freecalypso-sw: gsm-fw/nucleus/tct.S annotate

annotate gsm-fw/nucleus/tct.S @ 429:f114f5c547ec

rvinterf/README: beginning of proper documentation

author	Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
date	Sat, 21 Jun 2014 19:36:32 +0000
parents	afceeeb2cba1
children	962f0d3a4e7e

rev	line source
79 947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1 /*
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2 ************************************************************************
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	3 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	4 * Copyright Mentor Graphics Corporation 2002
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	5 * All Rights Reserved.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	6 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	7 * THIS WORK CONTAINS TRADE SECRET AND PROPRIETARY INFORMATION WHICH IS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	8 * THE PROPERTY OF MENTOR GRAPHICS CORPORATION OR ITS LICENSORS AND IS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	9 * SUBJECT TO LICENSE TERMS.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	10 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	11 ************************************************************************
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	12 ************************************************************************
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	13 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	14 * FILE NAME VERSION
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	15 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	16 * tct.s Nucleus PLUS\ARM925\Code Composer 1.14.1
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	17 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	18 * COMPONENT
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	19 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	20 * TC - Thread Control
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	21 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	22 * DESCRIPTION
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	23 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	24 * This file contains the target processor dependent routines for
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	25 * performing target-dependent scheduling functions.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	26 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	27 * FUNCTIONS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	28 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	29 * TCT_Control_Interrupts Enable / disable interrupts
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	30 * by changing
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	31 * TCD_Interrupt_Level
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	32 * TCT_Local_Control_Interrupts Enable/disable interrupts
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	33 * by not changing
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	34 * TCD_Interrupt_Level
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	35 * TCT_Restore_Interrupts Restores interrupts to the
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	36 * level in TCD_Interrupt_Level
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	37 * TCT_Build_Task_Stack Build initial task stack
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	38 * TCT_Build_HISR_Stack Build initial HISR stack
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	39 * TCT_Build_Signal_Frame Build signal handler frame
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	40 * TCT_Check_Stack Check current stack
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	41 * TCT_Schedule Schedule the next thread
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	42 * TCT_Control_To_Thread Transfer control to a thread
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	43 * TCT_Control_To_System Transfer control from thread
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	44 * TCT_Signal_Exit Exit from signal handler
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	45 * TCT_Current_Thread Returns a pointer to current
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	46 * thread
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	47 * TCT_Set_Execute_Task Sets TCD_Execute_Task under
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	48 * protection from interrupts
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	49 * TCT_Protect Protect critical section
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	50 * TCT_Unprotect Unprotect critical section
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	51 * TCT_Unprotect_Specific Release specific protection
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	52 * TCT_Set_Current_Protect Set the thread's current
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	53 * protection field
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	54 * TCT_Protect_Switch Switch to protected thread
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	55 * TCT_Schedule_Protected Schedule the protected thread
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	56 * TCT_Interrupt_Context_Save Save interrupted context
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	57 * TCT_Interrupt_Context_Restore Restore interrupted context
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	58 * TCT_Activate_HISR Activate a HISR
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	59 * TCT_HISR_Shell HISR execution shell
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	60 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	61 * DEPENDENCIES
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	62 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	63 * cs_extr.h Common Service functions
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	64 * tc_extr.h Thread Control functions
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	65 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	66 * HISTORY
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	67 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	68 * NAME DATE REMARKS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	69 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	70 * B. Ronquillo 08-28-2002 Released version 1.14.1
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	71 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	72 ************************************************************************
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	73 */
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	74
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	75 #define NU_SOURCE_FILE
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	76
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	77 /*
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	78 ******************************
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	79 * INCLUDE ASSEMBLY CONSTANTS *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	80 ******************************
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	81 * Define constants used in low-level initialization.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	82 */
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	83
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	84 #include "asm_defs.h"
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	85
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	86 .code 32
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	87
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	88 /* TCT_System_Limit is a global variable defined in this module */
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	89
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	90 .comm TCT_System_Limit,4,4
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	91
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	92 .text
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	93
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	94 /*
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	95 **********************************
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	96 * LOCAL VARIABLE DECLARATIONS *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	97 **********************************
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	98 * Define pointers to system variables so their addresses may be obtained in a
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	99 * pc-relative manner.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	100 */
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	101
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	102 System_Limit:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	103 .word TCT_System_Limit
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	104
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	105 Int_Level:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	106 .word TCD_Interrupt_Level
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	107
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	108 Task_Shell:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	109 .word TCC_Task_Shell
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	110
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	111 HISR_Shell:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	112 .word TCT_HISR_Shell
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	113
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	114 Signal_Shell:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	115 .word TCC_Signal_Shell
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	116
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	117 Current_Thread:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	118 .word TCD_Current_Thread
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	119
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	120 Execute_HISR:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	121 .word TCD_Execute_HISR
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	122
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	123 Execute_Task:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	124 .word TCD_Execute_Task
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	125
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	126 Time_Slice:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	127 .word TMD_Time_Slice
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	128
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	129 Slice_State:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	130 .word TMD_Time_Slice_State
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	131
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	132 System_Stack:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	133 .word TCD_System_Stack
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	134
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	135 Int_Count:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	136 .word TCD_Interrupt_Count
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	137
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	138 HISR_Tails:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	139 .word TCD_Active_HISR_Tails
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	140
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	141 HISR_Heads:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	142 .word TCD_Active_HISR_Heads
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	143
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	144 /*
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	145 ************************************************************************
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	146 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	147 * FUNCTION
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	148 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	149 * TCT_Control_Interrupts
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	150 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	151 * DESCRIPTION
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	152 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	153 * This function enables and disables interrupts as specified by
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	154 * the caller. Interrupts disabled by this call are left disabled
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	155 * until the another call is made to enable them.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	156 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	157 * CALLED BY
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	158 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	159 * Application
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	160 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	161 * CALLS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	162 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	163 * None
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	164 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	165 * INPUTS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	166 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	167 * new_level New interrupt enable level
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	168 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	169 * OUTPUTS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	170 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	171 * old_level Previous interrupt enable
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	172 * level
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	173 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	174 * HISTORY
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	175 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	176 * NAME DATE REMARKS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	177 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	178 * W. Lamie 02-15-1994 Created initial version 1.0
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	179 * D. Lamie 02-15-1994 Verified version 1.0
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	180 * C. Meredith 03-01-1994 Lockout interrupts while setting
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	181 * up the new level, resutling in
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	182 * version 1.1
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	183 * D. Lamie 03-18-1994 Verified version 1.1
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	184 * M. Trippi 02-03-1997 Masked the return value to only
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	185 * return the interrupt bits.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	186 * (SPR0252)
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	187 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	188 ************************************************************************
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	189 */
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	190
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	191 @INT TCT_Control_Interrupts (INT new_level)
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	192 @{
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	193
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	194 .globl TCT_Control_Interrupts
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	195 TCT_Control_Interrupts:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	196
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	197 @INT old_level; Old interrupt level
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	198
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	199 @ lock out all interrupts before any checking or changing
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	200
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	201 @ Obtain the current interrupt lockout posture.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	202 @ old_level = TCD_Interrupt_Level;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	203
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	204 @ Setup new interrupt lockout posture.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	205 @ TCD_Interrupt_Level = new_level;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	206
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	207 @ renable interrupts for the specified lockout
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	208
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	209 @ Return old interrupt lockout level.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	210 @ return(old_level);
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	211
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	212 MRS r2,CPSR @ Pickup current CPSR
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	213 ORR r2,r2,#LOCKOUT @ Build lockout CPSR
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	214 MSR CPSR,r2 @ Lockout interrupts temporarily
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	215 LDR r1, Int_Level @ Pickup interrupt level
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	216 LDR r3,[r1, #0] @ Pickup current interrupt lockout
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	217 BIC r2,r2,#LOCK_MSK @ Clear lockout mask
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	218 ORR r2,r2,r0 @ Build new CPSR with appropriate
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	219 @ interrupts locked out
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	220 STR r0,[r1,#0] @ Save current lockout
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	221 MSR CPSR,r2 @ Setup new CPSR lockout bits
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	222 AND r0,r3,#LOCK_MSK @ Return previous lockout (SPR0252)
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	223
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	224 BX r14 @ Return to caller
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	225
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	226 @}
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	227
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	228 /*
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	229 ************************************************************************
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	230 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	231 * FUNCTION
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	232 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	233 * TCT_Local_Control_Interrupts
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	234 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	235 * DESCRIPTION
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	236 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	237 * This function enables and disables interrupts as specified by
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	238 * the caller.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	239 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	240 * CALLED BY
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	241 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	242 * Application
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	243 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	244 * CALLS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	245 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	246 * None
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	247 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	248 * INPUTS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	249 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	250 * new_level New interrupt enable level
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	251 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	252 * OUTPUTS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	253 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	254 * old_level Previous interrupt enable
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	255 * level
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	256 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	257 * HISTORY
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	258 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	259 * NAME DATE REMARKS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	260 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	261 * C. Meredith 03-01-1994 Created initial version 1.1
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	262 * D. Lamie 03-18-1994 Verified version 1.1
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	263 * M. Trippi 02-03-1997 Masked the return value to only
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	264 * return the interrupt bits.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	265 * (SPR0252)
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	266 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	267 ************************************************************************
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	268 */
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	269
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	270 @INT TCT_Local_Control_Interrupts (INT new_level)
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	271 @{
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	272
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	273 .globl TCT_Local_Control_Interrupts
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	274 TCT_Local_Control_Interrupts:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	275
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	276 @INT old_level; Old interrupt level
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	277
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	278 @ read in the old level
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	279 @ old_level = current interrupt level of processor;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	280
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	281 MRS r2,CPSR @ Pickup current CPSR
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	282 MOV r3,r2 @ save the old level
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	283
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	284 @ clear out the old level and set the new level
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	285 @ current interrupt level of processor &= ~LOCKOUT;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	286 @ current interrupt level of processor \|= new_level;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	287
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	288 BIC r2,r2,#LOCK_MSK @ Clear all current interrupts
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	289 ORR r2,r2,r0 @ Build new CPSR with new
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	290 @ interrupt level
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	291 MSR CPSR,r2 @ Setup new CPSR interrupt bits
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	292
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	293 @ Return old interrupt lockout level.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	294 @ return(old_level);
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	295
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	296 AND r0,r3,#LOCK_MSK @ Return previous lockout (SPR0252)
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	297
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	298 BX r14 @ Return to caller
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	299
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	300 @}
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	301
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	302 /*
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	303 ************************************************************************
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	304 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	305 * FUNCTION
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	306 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	307 * TCT_Restore_Interrupts
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	308 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	309 * DESCRIPTION
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	310 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	311 * This function restores interrupts to that specified in the global
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	312 * TCD_Interrupt_Level variable.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	313 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	314 * CALLED BY
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	315 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	316 * Application
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	317 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	318 * CALLS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	319 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	320 * None
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	321 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	322 * INPUTS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	323 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	324 * None.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	325 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	326 * OUTPUTS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	327 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	328 * None.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	329 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	330 * HISTORY
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	331 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	332 * NAME DATE REMARKS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	333 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	334 * C. Meredith 03-01-1994 Created initial version 1.1
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	335 * D. Lamie 03-18-1994 Verified version 1.1
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	336 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	337 ************************************************************************
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	338 */
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	339
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	340 @VOID TCT_Restore_Interrupts (VOID)
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	341 @{
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	342
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	343 .globl TCT_Restore_Interrupts
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	344 TCT_Restore_Interrupts:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	345
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	346 @ Lock out all interrupts before any checking or changing
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	347 @ Obtain the current interrupt lockout posture.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	348 @ Reload the level base on the TCD_Interrupt_Level variable
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	349
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	350 MRS r1,CPSR @ Pickup current CPSR
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	351 MOV r2,r1 @ save the CPSR value
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	352 ORR r1,r1,#LOCKOUT @ Build lockout CPSR
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	353 MSR CPSR,r1 @ Lockout interrupts temporarily
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	354 BIC r2,r2,#LOCK_MSK @ Clear current interrupt levels
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	355 LDR r1,Int_Level @ Load address of TCD_Interrupt_Level
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	356 LDR r0,[r1, #0] @ Pickup current interrupt lockout
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	357 ORR r2,r2,r0 @ Build new CPSR with appropriate
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	358 @ interrupts locked out
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	359 MSR CPSR,r2 @ Setup new CPSR lockout bits
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	360
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	361 BX r14 @ Return to caller
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	362
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	363 @}
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	364
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	365 /*
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	366 ************************************************************************
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	367 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	368 * FUNCTION
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	369 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	370 * TCT_Build_Task_Stack
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	371 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	372 * DESCRIPTION
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	373 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	374 * This function builds an initial stack frame for a task. The
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	375 * initial stack contains information concerning initial values of
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	376 * registers and the task's point of entry. Furthermore, the
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	377 * initial stack frame is in the same form as an interrupt stack
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	378 * frame.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	379 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	380 * CALLED BY
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	381 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	382 * TCC_Create_Task Create a new task
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	383 * TCC_Reset_Task Reset the specified task
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	384 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	385 * CALLS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	386 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	387 * None
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	388 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	389 * INPUTS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	390 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	391 * task Task control block pointer
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	392 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	393 * OUTPUTS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	394 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	395 * None
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	396 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	397 * HISTORY
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	398 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	399 * NAME DATE REMARKS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	400 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	401 * W. Lamie 02-15-1994 Created initial version 1.0
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	402 * D. Lamie 02-15-1994 Verified version 1.0
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	403 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	404 ************************************************************************
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	405 */
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	406
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	407 @VOID TCT_Build_Task_Stack(TC_TCB *task)
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	408 @{
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	409
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	410 .globl TCT_Build_Task_Stack
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	411 TCT_Build_Task_Stack:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	412
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	413 @ Pickup the stack base.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	414 @ REG_Stack_Base = (BYTE_PTR) task -> tc_stack_start;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	415
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	416 LDR r2,[r0,#0x24] @ Pickup the stack starting address
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	417
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	418 @ Pickup the stack size.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	419 @ REG_Stack_Size = task -> tc_stack_size;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	420
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	421 LDR r1,[r0,#0x30] @ Pickup the stack size in bytes
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	422
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	423 @ Calculate the stack ending address.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	424 @ REG_Stack_End = REG_Stack_Base + REG_Stack_Size - 1;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	425
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	426 ADD r3,r1,r2 @ Compute the beginning of stack
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	427 BIC r3,r3,#3 @ Insure word alignment
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	428 SUB r3,r3,#4 @ Reserve a word
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	429
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	430 @ Save the stack ending address.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	431 @ task -> tc_stack_end = REG_Stack_End;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	432
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	433 STR r3,[r0,#0x28] @ Save the stack ending address
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	434
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	435 @ Reference the task shell.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	436 @ REG_Function_Ptr = (VOID *) TCC_Task_Shell;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	437
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	438 @ Build an initial stack. This initial stack frame facilitates an
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	439 @ interrupt return to the TCC_Task_Shell function, which in turn
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	440 @ invokes the application task. The initial stack frame has the
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	441 @ following format:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	442
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	443 @ (Lower Address) Stack Top -> 1 (Interrupt stack type)
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	444 @ CPSR Saved CPSR
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	445 @ r0 Saved r0
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	446 @ r1 Saved r1
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	447 @ r2 Saved r2
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	448 @ r3 Saved r3
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	449 @ r4 Saved r4
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	450 @ r5 Saved r5
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	451 @ r6 Saved r6
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	452 @ r7 Saved r7
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	453 @ r8 Saved r8
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	454 @ r9/sb Saved r9/sl
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	455 @ r10/sl Saved r10/sl
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	456 @ fp Saved fp
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	457 @ r12 Saved r12
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	458 @ r13 Saved r13
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	459 @ r14 Saved r14
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	460 @ (Higher Address) Stack Bottom-> r15 Saved r15
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	461
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	462
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	463 LDR r2, Task_Shell @ Pickup address of shell entry
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	464 STR r2,[r3], #-4 @ Store entry address on stack
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	465 MOV r2,#0 @ Clear value for initial registers
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	466 STR r2,[r3], #-4 @ Store initial r14
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	467 ADD r2,r3,#8 @ Compute initial r13
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	468 STR r2,[r3], #-4 @ Store initial r13 (Stack Bottom)
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	469 STR r2,[r3], #-4 @ Store initial r12
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	470 STR r2,[r3], #-4 @ Store initial fp
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	471 LDR r2,[r0,#0x24] @ Pickup the stack starting address
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	472 STR r2,[r3], #-4 @ Store initial r10/sl
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	473 MOV r2,#0 @ Clear value for initial registers
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	474 STR r2,[r3], #-4 @ Store initial r9/sb
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	475 STR r2,[r3], #-4 @ Store initial r8
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	476 STR r2,[r3], #-4 @ Store initial r7
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	477 STR r2,[r3], #-4 @ Store initial r6
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	478 STR r2,[r3], #-4 @ Store initial r5
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	479 STR r2,[r3], #-4 @ Store initial r4
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	480 STR r2,[r3], #-4 @ Store initial r3
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	481 STR r2,[r3], #-4 @ Store initial r2
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	482 STR r2,[r3], #-4 @ Store initial r1
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	483 STR r2,[r3], #-4 @ Store initial r0
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	484 MSR CPSR_f,r2 @ Clear the flags
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	485 MRS r2,CPSR @ Pickup the CPSR
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	486 BIC r2,r2,#LOCK_MSK @ Clear initial interrupt lockout
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	487 STR r2,[r3], #-4 @ Store CPSR on the initial stack
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	488 MOV r2,#1 @ Build interrupt stack type (1)
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	489 STR r2,[r3, #0] @ Store stack type on the top
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	490
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	491 @ Save the minimum amount of remaining stack memory.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	492 @ task -> tc_stack_minimum = REG_Stack_Size - 72;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	493
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	494 MOV r2,#72 @ Size of interrupt stack frame
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	495 SUB r1,r1,r2 @ Compute minimum available bytes
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	496 STR r1,[r0, #0x34] @ Save in minimum stack area
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	497
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	498 @ Save the new stack pointer into the task's control block.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	499 @ task -> tc_stack_pointer = (VOID *) Stack_Top;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	500
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	501 STR r3,[r0, #0x2C] @ Save stack pointer
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	502
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	503 BX r14 @ Return to caller
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	504
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	505 @}
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	506
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	507 /*
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	508 ************************************************************************
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	509 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	510 * FUNCTION
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	511 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	512 * TCT_Build_HISR_Stack
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	513 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	514 * DESCRIPTION
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	515 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	516 * This function builds an HISR stack frame that allows quick
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	517 * scheduling of the HISR.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	518 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	519 * CALLED BY
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	520 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	521 * TCC_Create_HISR Create HISR function
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	522 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	523 * CALLS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	524 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	525 * None
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	526 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	527 * INPUTS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	528 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	529 * hisr HISR control block pointer
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	530 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	531 * OUTPUTS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	532 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	533 * None
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	534 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	535 * HISTORY
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	536 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	537 * NAME DATE REMARKS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	538 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	539 * W. Lamie 02-15-1994 Created initial version 1.0
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	540 * D. Lamie 02-15-1994 Verified version 1.0
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	541 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	542 ************************************************************************
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	543 */
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	544
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	545 @VOID TCT_Build_HISR_Stack(TC_HCB *hisr)
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	546 @{
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	547
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	548 .globl TCT_Build_HISR_Stack
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	549 TCT_Build_HISR_Stack:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	550
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	551 @ Pickup the stack base.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	552 @ REG_Stack_Base = (BYTE_PTR) hisr -> tc_stack_start;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	553
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	554 LDR r2,[r0,#0x24] @ Pickup the stack starting address
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	555
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	556 @ Pickup the stack size.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	557 @ REG_Stack_Size = hisr -> tc_stack_size;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	558
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	559 LDR r1,[r0,#0x30] @ Pickup the stack size in bytes
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	560
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	561 @ Calculate the stack ending address.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	562 @ REG_Stack_End = REG_Stack_Base + REG_Stack_Size;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	563
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	564 ADD r3,r1,r2 @ Compute the beginning of stack
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	565 BIC r3,r3,#3 @ Insure word alignment
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	566 SUB r3,r3,#4 @ Reserve a word
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	567
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	568 @ Save the stack ending address.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	569 @ hisr -> tc_stack_end = REG_Stack_End;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	570
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	571 STR r3,[r0,#0x28] @ Save the stack ending address
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	572
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	573 @ Reference the HISR shell.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	574 @ REG_Function_Ptr = (VOID *) TCT_HISR_Shell;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	575
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	576 @ Build an initial stack. This initial stack frame facilitates an
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	577 @ solicited return to the TCT_HISR_Shell function, which in turn
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	578 @ invokes the appropriate HISR. The initial HISR stack frame has the
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	579 @ following format:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	580
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	581 @ (Lower Address) Stack Top -> 0 (Solicited stack type)
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	582 @ !!FOR THUMB ONLY!! 0/0x20 Saved state mask
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	583 @ r4 Saved r4
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	584 @ r5 Saved r5
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	585 @ r6 Saved r6
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	586 @ r7 Saved r7
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	587 @ r8 Saved r8
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	588 @ r9/sb Saved r9/sl
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	589 @ r10/sl Saved r10/sl
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	590 @ fp Saved fp
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	591 @ r12 Saved r12
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	592 @ (Higher Address) Stack Bottom-> r15 Saved r15
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	593
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	594
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	595 LDR r2,HISR_Shell @ Pickup address of shell entry
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	596 STR r2,[r3], #-4 @ Store entry address on stack
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	597 ADD r2,r3,#4 @ Compute initial r13
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	598 STR r2,[r3], #-4 @ Store initial r12
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	599 STR r2,[r3], #-4 @ Store initial fp
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	600 LDR r2,[r0,#0x24] @ Pickup the stack starting address
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	601 STR r2,[r3], #-4 @ Store initial r10/sl
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	602 MOV r2,#0 @ Clear value for initial registers
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	603 STR r2,[r3], #-4 @ Store initial r9/sb
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	604 STR r2,[r3], #-4 @ Store initial r8
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	605 STR r2,[r3], #-4 @ Store initial r7
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	606 STR r2,[r3], #-4 @ Store initial r6
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	607 STR r2,[r3], #-4 @ Store initial r5
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	608 STR r2,[r3], #-4 @ Store initial r4
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	609 #if 1 /* was .if THUMB */
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	610 STR r2,[r3], #-4 @ Store initial state mask
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	611 #endif
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	612 STR r2,[r3, #0] @ Store solicited stack type on the
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	613 @ top of the stack
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	614
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	615 @ Save the minimum amount of remaining stack memory.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	616 @ hisr -> tc_stack_minimum = REG_Stack_Size - (ARM)44 or (THUMB)48;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	617
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	618 #if 1 /* was .if THUMB */
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	619 MOV r2,#48 @ Size of solicited stack frame
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	620 #else
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	621 MOV r2,#44 @ Size of solicited stack frame
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	622 #endif
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	623
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	624 SUB r1,r1,r2 @ Compute minimum available bytes
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	625 STR r1,[r0, #0x34] @ Save in minimum stack area
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	626
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	627 @ Save the new stack pointer into the task's control block.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	628 @ hisr -> tc_stack_pointer = (VOID *) Stack_Top;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	629
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	630 STR r3,[r0, #0x2C] @ Save stack pointer
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	631
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	632 BX r14 @ Return to caller
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	633
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	634 @}
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	635
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	636 /*
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	637 ************************************************************************
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	638 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	639 * FUNCTION
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	640 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	641 * TCT_Build_Signal_Frame
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	642 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	643 * DESCRIPTION
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	644 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	645 * This function builds a frame on top of the task's stack to
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	646 * cause the task's signal handler to execute the next time
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	647 * the task is executed.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	648 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	649 * CALLED BY
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	650 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	651 * TCC_Send_Signals Send signals to a task
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	652 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	653 * CALLS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	654 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	655 * None
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	656 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	657 * INPUTS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	658 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	659 * task Task control block pointer
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	660 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	661 * OUTPUTS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	662 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	663 * None
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	664 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	665 * HISTORY
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	666 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	667 * NAME DATE REMARKS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	668 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	669 * W. Lamie 02-15-1994 Created initial version 1.0
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	670 * D. Lamie 02-15-1994 Verified version 1.0
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	671 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	672 ************************************************************************
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	673 */
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	674
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	675 @VOID TCT_Build_Signal_Frame(TC_TCB *task)
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	676 @{
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	677
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	678 .globl TCT_Build_Signal_Frame
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	679 TCT_Build_Signal_Frame:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	680
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	681 @ Pickup the stack pointer.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	682 @ REG_Stack_Ptr = (BYTE_PTR) task -> tc_stack_pointer;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	683
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	684 LDR r3,[r0,#0x2c] @ Pickup the current stack pointer
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	685
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	686 @ Reference the Signal shell.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	687 @ REG_Function_Ptr = (VOID *) TCC_Signal_Shell;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	688
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	689 @ Build a signal stack. This signal stack frame facilitates an
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	690 @ solicited return to the TCC_Signal_Shell function, which in turn
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	691 @ invokes the appropriate signal handler. The initial HISR stack frame
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	692 @ has the following format:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	693
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	694 @ (Lower Address) Stack Top -> 0 (Solicited stack type)
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	695 @ !!FOR THUMB ONLY!! 0/0x20 Saved state mask
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	696 @ r4 Saved r4
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	697 @ r5 Saved r5
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	698 @ r6 Saved r6
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	699 @ r7 Saved r7
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	700 @ r8 Saved r8
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	701 @ r9/sb Saved r9/sl
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	702 @ r10/sl Saved r10/sl
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	703 @ fp Saved fp
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	704 @ r12 Saved r12
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	705 @ (Higher Address) Stack Bottom-> r15 Saved r15
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	706
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	707
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	708 LDR r2,Signal_Shell @ Pickup address of shell entry
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	709 SUB r3,r3,#4
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	710 STR r2,[r3], #-4 @ Store entry address on stack
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	711 ADD r2,r3,#4 @ Compute initial r13
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	712 STR r2,[r3], #-4 @ Store initial r12
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	713 STR r2,[r3], #-4 @ Store initial fp
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	714 LDR r2,[r0,#0x24] @ Pickup the stack starting address
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	715 STR r2,[r3], #-4 @ Store initial r10/sl
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	716 MOV r2,#0 @ Clear value for initial registers
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	717 STR r2,[r3], #-4 @ Store initial r9/sb
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	718 STR r2,[r3], #-4 @ Store initial r8
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	719 STR r2,[r3], #-4 @ Store initial r7
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	720 STR r2,[r3], #-4 @ Store initial r6
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	721 STR r2,[r3], #-4 @ Store initial r5
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	722 STR r2,[r3], #-4 @ Store initial r4
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	723 #if 0
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	724 MOV r1,#0x20 @ Get initial state mask
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	725 STR r1,[r3], #-4 @ Store initial state mask
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	726 #else
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	727 STR r2,[r3], #-4 @ TCC_Signal_Shell is an ARM proc
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	728 #endif
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	729
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	730 STR r2,[r3, #0] @ Store solicited stack type on the
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	731 @ top of the stack
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	732
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	733 @ Save the new stack pointer into the task's control block.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	734 @ task -> tc_stack_pointer = (VOID *) (REG_Stack_Ptr - REG_Stack_Size);
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	735
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	736 STR r3,[r0, #0x2C] @ Save stack pointer
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	737
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	738 BX r14 @ Return to caller
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	739
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	740 @}
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	741
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	742 /*
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	743 ************************************************************************
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	744 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	745 * FUNCTION
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	746 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	747 * TCT_Check_Stack
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	748 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	749 * DESCRIPTION
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	750 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	751 * This function checks the current stack for overflow conditions.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	752 * Additionally, this function keeps track of the minimum amount
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	753 * of stack space for the calling thread and returns the current
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	754 * available stack space.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	755 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	756 * CALLED BY
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	757 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	758 * TCC_Send_Signals Send signals to a task
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	759 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	760 * CALLS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	761 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	762 * ERC_System_Error System error handler
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	763 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	764 * INPUTS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	765 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	766 * None
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	767 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	768 * OUTPUTS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	769 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	770 * available bytes in stack
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	771 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	772 * HISTORY
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	773 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	774 * NAME DATE REMARKS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	775 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	776 * W. Lamie 02-15-1994 Created initial version 1.0
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	777 * D. Lamie 02-15-1994 Verified version 1.0
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	778 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	779 ************************************************************************
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	780 */
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	781
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	782 @UNSIGNED TCT_Check_Stack(void)
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	783 @{
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	784
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	785 .globl TCT_Check_Stack
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	786 TCT_Check_Stack:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	787
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	788 @TC_TCB *thread;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	789 @UNSIGNED remaining;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	790
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	791 @ Pickup the current task/HISR pointer.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	792 @ thread = (TC_TCB *) TCD_Current_Thread;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	793
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	794 LDR r0,Current_Thread @ Pickup address of thread pointer
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	795 LDR r0,[r0,#0] @ Pickup thread pointer
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	796
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	797 @ Determine if there is a current thread.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	798 @ if (thread)
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	799 @ {
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	800
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	801 CMP r0,#0 @ Determine if a thread is active
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	802 MOV r3,#0 @ Default remaining value
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	803 BEQ TCT_Skip_Stack_Check @ If NU_NULL, skip stack checking
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	804
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	805 @ Determine if the stack pointers are out of range.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	806 @ if ((thread -> tc_stack_pointer < thread -> tc_stack_start) \|\|
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	807 @ (thread -> tc_stack_pointer > thread -> tc_stack_end))
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	808
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	809 LDR r2,[r0,#0x24] @ Pickup start of stack area
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	810 CMP r13,r2 @ Compare with current stack ptr
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	811 BLT TCT_Stack_Range_Error @ If less, stack is out of range
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	812 LDR r1,[r0,#0x28] @ Pickup end of stack area
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	813 CMP r13,r1 @ Compare with current stack ptr
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	814 BLE TCT_Stack_Range_Okay @ If less, stack range is okay
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	815
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	816 @ Stack overflow condition exits.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	817 @ ERC_System_Error(NU_STACK_OVERFLOW);
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	818
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	819 TCT_Stack_Range_Error:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	820
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	821 STR r14,[r13, #4]! @ Store r14 on the stack
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	822 MOV r0,#3 @ Build NU_STACK_OVERFLOW code
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	823 BL ERC_System_Error @ Call system error handler. Note:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	824 @ control is not returned!
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	825 @ Examine stack to find return
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	826 @ address of this routine.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	827
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	828 TCT_Stack_Range_Okay:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	829
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	830 @ Calculate the amount of available space on the stack.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	831 @ remaining = (BYTE_PTR) thread -> tc_stack_pointer -
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	832 @ (BYTE_PTR) thread -> tc_stack_start;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	833
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	834 SUB r3,r13,r2 @ Calculate remaining stack size
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	835
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	836 @ Determine if there is enough memory on the stack to save all of the
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	837 @ registers.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	838 @ if (remaining < 80)
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	839
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	840 CMP r3,#80 @ Is there enough room for an
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	841 @ interrupt frame?
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	842 BCS TCT_No_Stack_Error @ If so, no stack overflow yet
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	843
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	844 @ Stack overflow condition is about to happen.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	845 @ ERC_System_Error(NU_STACK_OVERFLOW);
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	846
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	847 STR r14,[r13, #4]! @ Store r14 on the stack
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	848 MOV r0,#3 @ Build NU_STACK_OVERFLOW code
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	849 BL ERC_System_Error @ Call system error handler. Note:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	850 @ control is not returned!
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	851 @ Examine stack to find return
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	852 @ address of this routine.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	853
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	854 TCT_No_Stack_Error:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	855
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	856 @ Determine if this is a new minimum amount of stack space.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	857 @ if (remaining < thread -> tc_stack_minimum)
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	858
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	859 LDR r2,[r0,#0x34]
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	860 CMP r3,r2
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	861 STRCC r3,[r0,#0x34]
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	862
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	863 @ Save the new stack minimum.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	864 @ thread -> tc_stack_minimum = remaining;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	865 @ }
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	866 @ else
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	867
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	868 @ Set the remaining bytes to 0.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	869 @ remaining = 0;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	870
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	871 @ Return the remaining number of bytes on the stack.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	872 @ return(remaining);
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	873
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	874 TCT_Skip_Stack_Check:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	875 MOV r0,r3 @ Return remaining bytes
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	876
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	877 BX r14 @ Return to caller
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	878
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	879 @}
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	880
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	881 /*
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	882 ************************************************************************
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	883 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	884 * FUNCTION
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	885 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	886 * TCT_Schedule
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	887 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	888 * DESCRIPTION
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	889 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	890 * This function waits for a thread to become ready. Once a thread
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	891 * is ready, this function initiates a transfer of control to that
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	892 * thread.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	893 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	894 * CALLED BY
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	895 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	896 * INC_Initialize Main initialization routine
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	897 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	898 * CALLS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	899 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	900 * TCT_Control_To_Thread Transfer control to a thread
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	901 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	902 * INPUTS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	903 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	904 * TCD_Execute_Task Pointer to task to execute
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	905 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	906 * OUTPUTS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	907 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	908 * None
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	909 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	910 * HISTORY
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	911 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	912 * NAME DATE REMARKS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	913 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	914 * W. Lamie 02-15-1994 Created initial version 1.0
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	915 * D. Lamie 02-15-1994 Verified version 1.0
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	916 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	917 ************************************************************************
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	918 */
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	919
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	920 @VOID TCT_Schedule(void)
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	921 @{
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	922
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	923 .globl TCT_Schedule
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	924 TCT_Schedule:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	925
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	926 @ Restore interrupts according to the value contained in
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	927 @ TCD_Interrupt_Level.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	928
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	929 LDR r1,Int_Level @ Build address of interrupt level
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	930 MRS r0,CPSR @ Pickup current CPSR
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	931 LDR r2,[r1, #0] @ Pickup current interrupt lockout
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	932 BIC r0,r0,#LOCK_MSK @ Clear the interrupt lockout bits
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	933 ORR r0,r0,r2 @ Build new interrupt lockout CPSR
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	934 MSR CPSR,r0 @ Setup new CPSR
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	935 LDR r2,Execute_HISR @ Pickup TCD_Execute_HISR address
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	936 LDR r3,Execute_Task @ Pickup TCD_Execute_Task address
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	937
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	938 #ifdef INCLUDE_PROVIEW
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	939 @ Nucleus ProView Hook
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	940 @ We check if upon entering TCT_Schedule we already have a task to excute.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	941 @ if not, we start IDLE.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	942 LDR r0,[r2, #0] @ Pickup highest priority HISR ptr
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	943 CMP r0,#0 @ Is there a HISR active?
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	944 BNE TCT_Schedule_Thread @ Found an HISR
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	945 LDR r0,[r3, #0] @ Pickup highest priority Task ptr
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	946 CMP r0,#0 @ Is there a task active?
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	947 BNE TCT_Schedule_Thread @ If not, start IDLE.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	948 STR r2,[r13, #-4]! @ Save r2 on the stack
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	949 STR r3,[r13, #-4]! @ Save r3 on the stack
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	950 BL _NU_Idle_Hook
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	951 LDR r3,[r13], #4 @ Recover r2
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	952 LDR r2,[r13], #4 @ Recover r3
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	953 #endif
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	954
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	955
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	956 @ Wait until a thread (task or HISR) is available to execute.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	957 @ do
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	958 @ {
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	959 TCT_Schedule_Loop:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	960
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	961 @ } while ((!TCD_Execute_HISR) && (!TCD_Execute_Task));
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	962
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	963 LDR r0,[r2, #0] @ Pickup highest priority HISR ptr
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	964 CMP r0,#0 @ Is there a HISR active?
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	965 BNE TCT_Schedule_Thread @ Found an HISR
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	966 LDR r0,[r3, #0] @ Pickup highest priority Task ptr
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	967 CMP r0,#0 @ Is there a task active?
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	968 BEQ TCT_Schedule_Loop @ If not, continue the search
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	969
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	970 @ Yes, either a task or an HISR is ready to execute. Lockout
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	971 @ interrupts while the thread is transferred to.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	972
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	973 TCT_Schedule_Thread:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	974 MRS r1,CPSR @ Pickup CPSR again
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	975 ORR r1,r1,#LOCKOUT @ Build interrupt lockout value
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	976 MSR CPSR,r1 @ Lockout interrupts
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	977
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	978 @ Transfer control to the thread by falling through to the following
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	979 @ routine.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	980 @}
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	981
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	982 /*
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	983 ************************************************************************
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	984 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	985 * FUNCTION
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	986 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	987 * TCT_Control_To_Thread
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	988 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	989 * DESCRIPTION
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	990 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	991 * This function transfers control to the specified thread. Each
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	992 * time control is transferred to a thread, its scheduled counter
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	993 * is incremented. Additionally, time-slicing for task threads is
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	994 * enabled in this routine. The TCD_Current_Thread pointer is
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	995 * setup by this function.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	996 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	997 * CALLED BY
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	998 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	999 * TCT_Schedule Indirectly called
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1000 * TCT_Protect Protection task switch
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1001 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1002 * CALLS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1003 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1004 * None
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1005 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1006 * INPUTS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1007 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1008 * thread Thread control block pointer
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1009 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1010 * OUTPUTS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1011 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1012 * None
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1013 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1014 * HISTORY
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1015 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1016 * NAME DATE REMARKS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1017 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1018 * W. Lamie 02-15-1994 Created initial version 1.0
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1019 * D. Lamie 02-15-1994 Verified version 1.0
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1020 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1021 ************************************************************************
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1022 */
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1023
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1024 @VOID TCT_Control_To_Thread(TC_TCB *thread)
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1025 @{
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1026 TCT_Control_To_Thread:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1027
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1028 @ Setup the current thread pointer.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1029 @ TCD_Current_Thread = (VOID *) thread;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1030
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1031 LDR r1,Current_Thread @ Pickup current thread ptr address
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1032 LDR r2,[r0, #0x1c] @ Pickup scheduled count
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1033 STR r0,[r1, #0] @ Setup current thread pointer
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1034
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1035 @ Increment the thread scheduled counter.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1036 @ thread -> tc_scheduled++;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1037
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1038 LDR r3,[r0, #0x20] @ Pickup time slice value
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1039 ADD r2,r2,#1 @ Increment the scheduled count
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1040 STR r2,[r0, #0x1c] @ Store new scheduled count
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1041
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1042 @ Check for time slice option.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1043 @ if (thread -> tc_cur_time_slice)
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1044 @ {
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1045 CMP r3,#0 @ Is there a time slice?
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1046 BEQ TCT_No_Start_TS_1 @ If 0, there is no time slice
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1047
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1048 @ Start a time slice.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1049 @ TMD_Time_Slice = thread -> tc_cur_time_slice;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1050 @ TMD_Time_Slice_State = 0;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1051
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1052 LDR r2,Time_Slice @ Pickup address of TMD_Time_Slice
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1053 LDR r1,Slice_State @ Pickup address of
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1054 @ TMD_Time_Slice_State
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1055 STR r3,[r2, #0] @ Setup the time slice
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1056 MOV r2,#0 @ Build active state flag
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1057 STR r2,[r1,#0] @ Set the active flag
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1058 @ }
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1059 TCT_No_Start_TS_1:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1060 #ifdef INCLUDE_PROVIEW
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1061 @ Nucleus ProView Hook
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1062
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1063 STR r0,[r13, #-4]! @ Save r0 on the stack
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1064 BL _NU_Schedule_Task_Hook @ Branch to RTView
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1065 LDR r0,[r13], #4 @ Recover return address
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1066 #endif
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1067
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1068
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1069 @ Pickup the stack pointer and resume the thread.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1070 @ REG_Stack_Ptr = thread -> tc_stack_pointer;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1071
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1072 LDR r13,[r0, #0x2c] @ Switch to thread's stack pointer
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1073
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1074 @ Pop off the saved information associated with the thread. After we
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1075 @ determine which type of stack is present. A 1 on the top of the
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1076 @ stack indicates an interrupt stack, while a 0 on the top of the
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1077 @ stack indicates a solicited type of stack.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1078
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1079 @ Remember that the interrupt level that is restored must represent
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1080 @ the interrupt level in TCD_Interrupt_Level.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1081
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1082 LDR r1,[r13], #4 @ Pop off the stack type
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1083 CMP r1,#1 @ See if it is an interrupt stack
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1084 BEQ TCT_Interrupt_Resume @ If so, an interrupt resume of
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1085 @ thread is required
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1086 LDR r1, Int_Level @ Pickup address of interrupt
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1087 @ lockout
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1088 MRS r0,CPSR @ Pickup current CPSR
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1089 BIC r0,r0,#LOCK_MSK @ Clear lockout mask
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1090
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1091 BIC r0,r0,#0x80000000
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1092
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1093
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1094 LDR r2,[r1, #0] @ Pickup interrupt lockout mask
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1095 ORR r0,r0,r2 @ Build new interrupt lockout mask
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1096 #if 1 /* was .if THUMB */
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1097 LDR r2,[r13], #4 @ Pop off the state mask
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1098 ORR r0,r0,r2 @ Set appropriate state
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1099 #endif
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1100 MSR SPSR,r0 @ Place it into the SPSR
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1101 LDMIA r13!,{r4-r12,r15}^ @ A solicited return is required.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1102 @ This type of return only
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1103 @ recovers r4-r13 & r15
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1104 TCT_Interrupt_Resume:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1105 LDR r0,[r13], #4 @ Pop off the CPSR
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1106 LDR r1,Int_Level @ Pickup address of interrupt
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1107 @ lockout
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1108 BIC r0,r0,#LOCK_MSK @ Clear lockout mask
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1109 LDR r2,[r1, #0] @ Pickup interrupt lockout mask
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1110 ORR r0,r0,r2 @ Build new interrupt lockout mask
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1111 MSR SPSR,r0 @ Place it into the SPSR
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1112 LDMIA r13,{r0-r15}^ @ Recover all registers and resume
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1113 @ at point of interrupt
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1114 @}
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1115
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1116 /*
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1117 ************************************************************************
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1118 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1119 * FUNCTION
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1120 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1121 * TCT_Control_To_System
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1122 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1123 * DESCRIPTION
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1124 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1125 * This function returns control from a thread to the system. Note
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1126 * that this service is called in a solicited manner, i.e. it is
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1127 * not called from an interrupt thread. Registers required by the
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1128 * compiler to be preserved across function boundaries are saved by
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1129 * this routine. Note that this is usually a sub-set of the total
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1130 * number of available registers.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1131 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1132 * CALLED BY
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1133 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1134 * Other Components
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1135 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1136 * CALLS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1137 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1138 * TCT_Schedule Schedule the next thread
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1139 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1140 * INPUTS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1141 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1142 * None
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1143 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1144 * OUTPUTS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1145 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1146 * None
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1147 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1148 * HISTORY
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1149 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1150 * NAME DATE REMARKS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1151 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1152 * W. Lamie 02-15-1994 Created initial version 1.0
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1153 * D. Lamie 02-15-1994 Verified version 1.0
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1154 * C. Meredith 03-01-1994 Corrected problem in time-slice
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1155 * reset logic, resulting in
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1156 * version 1.1
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1157 * D. Lamie 03-18-1994 Verified version 1.1
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1158 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1159 ************************************************************************
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1160 */
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1161
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1162 @VOID TCT_Control_To_System(void)
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1163 @{
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1164
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1165 .globl TCT_Control_To_System
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1166 TCT_Control_To_System:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1167
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1168 @ Lockout interrupts.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1169
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1170 MRS r0,CPSR @ Pickup current CPSR
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1171 ORR r0,r0,#LOCKOUT @ Build interrupt lockout value
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1172 MSR CPSR,r0 @ Lockout interrupts
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1173
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1174 @ Save a minimal context of the thread.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1175
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1176 STMDB r13!,{r4-r12,r14} @ Save minimal context of thread on
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1177 @ the current stack
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1178 #if 1 /* was .if THUMB */
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1179 MOV r2,r14 @ Determine what state the caller
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1180 MOV r2,r2,LSL #31 @ was in and build an
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1181 MOV r2,r2,LSR #26 @ appropriate state mask
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1182 STR r2,[r13, #-4]! @ Place it on the stack
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1183 #endif
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1184
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1185 MOV r2,#0 @ Build solicited stack type value
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1186 @ and NU_NULL value
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1187 STR r2,[r13, #-4]! @ Place it on the top of the stack
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1188
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1189 @ Setup a pointer to the thread control block.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1190 @ REG_Thread_Ptr = (TC_TCB *) TCD_Current_Thread;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1191
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1192 LDR r1,Current_Thread @ Pickup current thread ptr address
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1193 LDR r0,[r1, #0] @ Pickup current thread pointer
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1194
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1195 @ Clear the current thread control block pointer.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1196 @ TCD_Current_Thread = NU_NULL;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1197
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1198 LDR r3,Slice_State @ Pickup time slice state address
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1199 STR r2,[r1, #0] @ Set current thread pointer to
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1200 @ NU_NULL
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1201
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1202 @ Check to see if a time slice is active. If so, copy the original time
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1203 @ slice into the current time slice field of the task's control block.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1204 @ if (TMD_Time_Slice_State == 0)
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1205 @ {
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1206 LDR r1,[r3, #0] @ Pickup time slice state flag
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1207 CMP r1,#0 @ Compare with active value
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1208 BNE TCT_No_Stop_TS_1 @ If non-active, don't disable
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1209
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1210
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1211 @ Insure that the next time the task runs it gets a fresh time
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1212 @ slice.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1213 @ REG_Thread_Ptr -> tc_cur_time_slice = REG_Thread_Ptr -> tc_time_slice;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1214
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1215 LDR r1,[r0, #0x40] @ Pickup original time slice
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1216
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1217 @ Clear any active time slice by setting the state to NOT_ACTIVE.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1218 @ TMD_Time_Slice_State = 1;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1219
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1220 MOV r2,#1 @ Build disable value
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1221 STR r2,[r3, #0] @ Disable time slice
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1222 STR r1,[r0, #0x20] @ Reset current time slice
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1223 @ }
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1224 TCT_No_Stop_TS_1:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1225
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1226 @ Save off the current stack pointer in the control block.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1227 @ REG_Thread_Ptr -> tc_stack_pointer = (VOID *) REG_Stack_Ptr;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1228
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1229 STR r13,[r0, #0x2c] @ Save the thread's stack pointer
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1230
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1231 @ Clear the task's current protection.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1232 @ (REG_Thread_Ptr -> tc_current_protect) -> tc_tcb_pointer = NU_NULL;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1233 @ REG_Thread_Ptr -> tc_current_protect = NU_NULL;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1234
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1235 LDR r1,[r0, #0x38] @ Pickup current thread pointer
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1236 MOV r2,#0 @ Build NU_NULL value
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1237 STR r2,[r0, #0x38] @ Clear the protect pointer field
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1238 STR r2,[r1, #0] @ Release the actual protection
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1239
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1240 @ Switch to the system stack.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1241 @ REG_Stack_Ptr = TCD_System_Stack;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1242
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1243 LDR r1, System_Stack @ Pickup address of stack pointer
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1244 LDR r2, System_Limit @ Pickup address of stack limit ptr
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1245 LDR r13,[r1, #0] @ Switch to system stack
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1246 LDR r10,[r2, #0] @ Setup system stack limit
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1247
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1248 @ Finished, return to the scheduling loop.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1249
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1250 B TCT_Schedule @ Return to scheduling loop
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1251 @}
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1252
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1253 /*
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1254 ************************************************************************
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1255 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1256 * FUNCTION
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1257 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1258 * TCT_Signal_Exit
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1259 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1260 * DESCRIPTION
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1261 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1262 * This function exits from a signal handler. The primary purpose
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1263 * of this function is to clear the scheduler protection and switch
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1264 * the stack pointer back to the normal task's stack pointer.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1265 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1266 * CALLED BY
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1267 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1268 * TCC_Signal_Shell Signal handling shell func
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1269 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1270 * CALLS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1271 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1272 * TCT_Schedule Scheduler
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1273 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1274 * INPUTS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1275 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1276 * None
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1277 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1278 * OUTPUTS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1279 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1280 * None
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1281 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1282 * HISTORY
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1283 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1284 * NAME DATE REMARKS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1285 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1286 * W. Lamie 02-15-1994 Created initial version 1.0
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1287 * D. Lamie 02-15-1994 Verified version 1.0
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1288 * C. Meredith 03-01-1994 Corrected problem in time-slice
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1289 * reset logic, resulting in
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1290 * version 1.1
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1291 * D. Lamie 03-18-1994 Verified version 1.1
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1292 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1293 ************************************************************************
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1294 */
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1295
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1296 @VOID TCT_Signal_Exit(void)
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1297 @{
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1298
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1299 .globl TCT_Signal_Exit
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1300 TCT_Signal_Exit:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1301
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1302 @ Lockout interrupts.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1303
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1304 MRS r3,CPSR @ Pickup current CPSR
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1305 ORR r3,r3,#LOCKOUT @ Build lockout value
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1306 MSR CPSR,r3 @ Lockout interrupts
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1307
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1308 @ Setup a pointer to the thread control block.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1309 @ REG_Thread_Ptr = (TC_TCB *) TCD_Current_Thread;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1310
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1311 LDR r1,Current_Thread @ Pickup address of thread pointer
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1312 MOV r2,#0 @ Build NU_NULL value
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1313 LDR r0,[r1,#0] @ Pickup current thread pointer
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1314
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1315 @ Clear the current thread control block.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1316 @ TCD_Current_Thread = NU_NULL;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1317
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1318 LDR r3,Slice_State @ Pickup time slice state address
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1319 STR r2,[r1, #0] @ Clear current thread pointer
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1320
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1321 @ Check to see if a time slice is active. If so, copy the original time
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1322 @ slice into the current time slice field of the task's control block.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1323 @ if (TMD_Time_Slice_State == 0)
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1324 @ {
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1325
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1326 LDR r1,[r3, #0] @ Pickup time slice state flag
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1327 CMP r1,#0 @ Compare with active value
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1328 BNE TCT_No_Stop_TS_2 @ If non-active, don't disable
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1329
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1330 @ Insure that the next time the task runs it gets a fresh time
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1331 @ slice.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1332 @ REG_Thread_Ptr -> tc_cur_time_slice = REG_Thread_Ptr -> tc_time_slice;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1333
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1334 LDR r1,[r0, #0x40] @ Pickup original time slice
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1335
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1336 @ Clear any active time slice by setting the state to NOT_ACTIVE.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1337 @ TMD_Time_Slice_State = 1;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1338
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1339 MOV r2,#1 @ Build disable value
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1340 STR r2,[r3, #0] @ Disable time slice
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1341 STR r1,[r0, #0x20] @ Reset current time slice
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1342 @ }
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1343 TCT_No_Stop_TS_2:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1344
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1345 @ Switch back to the saved stack. The saved stack pointer was saved
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1346 @ before the signal frame was built.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1347 @ REG_Thread_Ptr -> tc_stack_pointer =
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1348 @ REG_Thread_Ptr -> tc_saved_stack_ptr;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1349
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1350 LDR r1,[r0, #0x3c] @ Pickup saved stack pointer
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1351 STR r1,[r0, #0x2c] @ Place in current stack pointer
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1352
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1353 @ Clear the task's current protection.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1354 @ (REG_Thread_Ptr -> tc_current_protect) -> tc_tcb_pointer = NU_NULL;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1355 @ REG_Thread_Ptr -> tc_current_protect = NU_NULL;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1356
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1357 LDR r1,[r0, #0x38] @ Pickup current thread pointer
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1358 MOV r2,#0 @ Build NU_NULL value
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1359 STR r2,[r0, #0x38] @ Clear the protect pointer field
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1360 STR r2,[r1, #0] @ Release the actual protection
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1361
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1362 @ Switch to the system stack.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1363 @ REG_Stack_Ptr = (BYTE_PTR) TCD_System_Stack;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1364
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1365 LDR r1, System_Stack @ Pickup address of stack pointer
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1366 LDR r2, System_Limit @ Pickup address of stack limit ptr
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1367 LDR r13,[r1, #0] @ Switch to system stack
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1368 LDR r10,[r2, #0] @ Setup system stack limit
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1369
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1370 @ Finished, return to the scheduling loop.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1371
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1372 B TCT_Schedule @ Return to scheduling loop
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1373 @}
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1374
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1375 /*
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1376 ************************************************************************
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1377 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1378 * FUNCTION
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1379 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1380 * TCT_Current_Thread
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1381 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1382 * DESCRIPTION
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1383 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1384 * This function returns the current thread pointer.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1385 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1386 * CALLED BY
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1387 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1388 * Application
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1389 * System Components
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1390 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1391 * CALLS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1392 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1393 * None
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1394 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1395 * INPUTS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1396 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1397 * None
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1398 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1399 * OUTPUTS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1400 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1401 * Pointer to current thread
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1402 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1403 * HISTORY
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1404 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1405 * NAME DATE REMARKS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1406 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1407 * W. Lamie 02-15-1994 Created initial version 1.0
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1408 * D. Lamie 02-15-1994 Verified version 1.0
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1409 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1410 ************************************************************************
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1411 */
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1412
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1413 @VOID *TCT_Current_Thread(void)
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1414 @{
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1415
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1416 .globl TCT_Current_Thread
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1417 TCT_Current_Thread:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1418
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1419 @ Return the current thread pointer.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1420 @ return(TCD_Current_Thread);
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1421
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1422 LDR r0, Current_Thread @ Pickup address of thread pointer
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1423 LDR r0,[r0, #0] @ Pickup current thread pointer
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1424
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1425 BX r14 @ Return to caller
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1426
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1427 @}
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1428
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1429 /*
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1430 ************************************************************************
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1431 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1432 * FUNCTION
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1433 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1434 * TCT_Set_Execute_Task
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1435 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1436 * DESCRIPTION
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1437 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1438 * This function sets the current task to execute variable under
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1439 * protection against interrupts.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1440 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1441 * CALLED BY
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1442 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1443 * TCC Scheduling Routines
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1444 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1445 * CALLS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1446 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1447 * None
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1448 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1449 * INPUTS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1450 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1451 * task Pointer to task control block
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1452 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1453 * OUTPUTS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1454 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1455 * TCD_Execute_Task Modified variable
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1456 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1457 * HISTORY
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1458 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1459 * NAME DATE REMARKS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1460 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1461 * W. Lamie 02-15-1994 Created initial version 1.0
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1462 * D. Lamie 02-15-1994 Verified version 1.0
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1463 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1464 ************************************************************************
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1465 */
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1466
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1467 @VOID TCT_Set_Execute_Task(TC_TCB *task)
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1468 @{
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1469
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1470 .globl TCT_Set_Execute_Task
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1471 TCT_Set_Execute_Task:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1472
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1473 @ Now setup the TCD_Execute_Task pointer.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1474 @ TCD_Execute_Task = task;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1475
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1476 LDR r1, Execute_Task @ Pickup execute task ptr address
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1477 STR r0,[r1,#0] @ Setup new task to execute
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1478
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1479 BX r14 @ Return to caller
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1480
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1481 @}
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1482
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1483 /*
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1484 ************************************************************************
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1485 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1486 * FUNCTION
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1487 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1488 * TCT_Protect
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1489 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1490 * DESCRIPTION
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1491 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1492 * This function protects against multiple thread access.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1493 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1494 * CALLED BY
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1495 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1496 * Application
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1497 * System Components
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1498 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1499 * CALLS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1500 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1501 * None
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1502 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1503 * INPUTS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1504 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1505 * protect Pointer to protection block
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1506 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1507 * OUTPUTS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1508 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1509 * None
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1510 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1511 * HISTORY
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1512 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1513 * NAME DATE REMARKS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1514 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1515 * W. Lamie 02-15-1994 Created initial version 1.0
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1516 * D. Lamie 02-15-1994 Verified version 1.0
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1517 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1518 ************************************************************************
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1519 */
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1520
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1521 @VOID TCT_Protect(TC_PROTECT *protect)
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1522 @{
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1523
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1524 .globl TCT_Protect
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1525 TCT_Protect:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1526
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1527 @ Determine if the caller is in a task or HISR thread.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1528 @ if (TCD_Current_Thread)
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1529 @ {
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1530
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1531 LDR r1,Current_Thread @ Pickup current thread ptr address
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1532 LDR r3,[r1, #0] @ Pickup current thread pointer
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1533 CMP r3,#0 @ Check to see if it is non-NULL
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1534 BEQ TCT_Skip_Protect @ If NULL, skip protection
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1535
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1536 @ Lockout interrupts.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1537
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1538 MRS r1,CPSR @ Pickup current CPSR
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1539 ORR r1,r1,#LOCKOUT @ Place lockout value in
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1540 MSR CPSR,r1 @ Lockout interrupts
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1541
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1542 @ Wait until the protect structure is available.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1543 @ while (protect -> tc_tcb_pointer != NU_NULL)
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1544 @ {
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1545
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1546 TCT_Protect_Loop:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1547 LDR r1,[r0, #0] @ Pickup protection owner field
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1548 CMP r1,#0 @ Is there any protection?
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1549 BEQ TCT_Protect_Available @ If NU_NULL, no current protection
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1550
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1551 @ Protection structure is not available.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1552
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1553 @ Indicate that another thread is waiting.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1554 @ protect -> tc_thread_waiting = 1;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1555
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1556 MOV r2,#1 @ Build thread waiting flag
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1557 STR r2,[r0, #4] @ Set waiting field
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1558
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1559 @ Directly schedule the thread waiting.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1560 @ TCT_Schedule_Protected(protect -> tc_tcb_pointer);
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1561
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1562 STR r0,[r13, #-4]! @ Save r0 on the stack
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1563 STR r14,[r13, #-4]! @ Save r14 on the stack
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1564 MOV r0,r3 @ Place current thread into r0
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1565 BL TCT_Schedule_Protected @ Call routine to schedule the
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1566 @ owner of the thread
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1567
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1568 LDR r14,[r13], #4 @ Recover saved r14
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1569 LDR r0,[r13], #4 @ Recover saved r0
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1570
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1571 @ Lockout interrupts.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1572
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1573 LDR r1,Current_Thread @ Pickup current thread ptr address
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1574 LDR r3,[r1, #0] @ Pickup current thread pointer
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1575 MRS r1,CPSR @ Pickup current CPSR
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1576 ORR r1,r1,#LOCKOUT @ Place lockout value in
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1577 MSR CPSR,r1 @ Lockout interrupts
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1578 B TCT_Protect_Loop @ Examine protect flags again
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1579 @ }
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1580 TCT_Protect_Available:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1581
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1582 @ Protection structure is available.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1583
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1584 @ Indicate that this thread owns the protection.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1585 @ protect -> tc_tcb_pointer = TCD_Current_Thread;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1586
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1587 STR r3,[r0, #0] @ Indicate calling thread owns this
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1588 @ protection
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1589
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1590 @ Clear the thread waiting flag.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1591 @ protect -> tc_thread_waiting = 0;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1592
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1593 MOV r2,#0 @ Clear value
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1594 STR r2,[r0, #4] @ Clear the thread waiting flag
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1595
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1596 @ Save the protection pointer in the thread's control block. Note
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1597 @ that both task and HISR threads share the same control block
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1598 @ format.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1599 @ REG_Thread_Ptr = (TC_TCB *) TCD_Current_Thread;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1600 @ REG_Thread_Ptr -> tc_current_protect = protect;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1601
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1602 STR r0,[r3, #0x38] @ Setup current protection
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1603
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1604 @ Restore interrupts.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1605
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1606 LDR r2,Int_Level @ Pickup address of interrupt level
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1607 MRS r1,CPSR @ Pickup current CPSR
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1608 LDR r3,[r2, #0] @ Pickup interrupt lockout level
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1609 BIC r1,r1,#LOCK_MSK @ Clear lockout bits
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1610 ORR r1,r1,r3 @ Build new interrupt lockout
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1611 MSR CPSR,r1 @ Setup CPSR appropriately
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1612 @ }
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1613
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1614 TCT_Skip_Protect:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1615
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1616 BX r14 @ Return to caller
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1617
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1618 @}
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1619
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1620 /*
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1621 ************************************************************************
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1622 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1623 * FUNCTION
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1624 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1625 * TCT_Unprotect
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1626 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1627 * DESCRIPTION
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1628 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1629 * This function releases protection of the currently active
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1630 * thread. If the caller is not an active thread, then this
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1631 * request is ignored.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1632 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1633 * CALLED BY
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1634 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1635 * Application
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1636 * System Components
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1637 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1638 * CALLS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1639 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1640 * None
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1641 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1642 * INPUTS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1643 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1644 * None
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1645 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1646 * OUTPUTS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1647 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1648 * None
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1649 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1650 * HISTORY
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1651 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1652 * NAME DATE REMARKS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1653 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1654 * W. Lamie 02-15-1994 Created initial version 1.0
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1655 * D. Lamie 02-15-1994 Verified version 1.0
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1656 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1657 ************************************************************************
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1658 */
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1659
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1660 @VOID TCT_Unprotect(void)
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1661 @{
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1662
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1663 .globl TCT_Unprotect
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1664 TCT_Unprotect:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1665
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1666
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1667 @ Determine if the caller is in a task or HISR thread.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1668 @ if (TCD_Current_Thread)
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1669 @ {
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1670
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1671 LDR r1,Current_Thread @ Pickup current thread ptr address
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1672 LDR r3,[r1, #0] @ Pickup current thread pointer
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1673 CMP r3,#0 @ Check to see if it is non-NULL
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1674 BEQ TCT_Skip_Unprotect @ If NULL, skip unprotection
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1675
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1676 @ Setup a thread control block pointer.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1677 @ REG_Thread_Ptr = (TC_TCB *) TCD_Current_Thread;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1678
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1679 @ Determine if there is a currently active protection.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1680 @ if (REG_Thread_Ptr -> tc_current_protect)
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1681 @ {
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1682
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1683 LDR r0,[r3, #0x38] @ Pickup current protect field
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1684 CMP r0,#0 @ Is there a protection in force?
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1685 BEQ TCT_Skip_Unprotect @ If not, nothing is protected
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1686
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1687 @ Lockout interrupts.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1688
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1689 MRS r1,CPSR @ Pickup current CPSR
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1690 ORR r1,r1,#LOCKOUT @ Place lockout value in
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1691 MSR CPSR,r1 @ Lockout interrupts
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1692
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1693 @ Yes, this thread still has this protection structure.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1694 @ REG_Protect_Ptr = REG_Thread_Ptr -> tc_current_protect;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1695
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1696 @ Is there a higher priority thread waiting for the protection
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1697 @ structure?
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1698 @ if (REG_Protect_Ptr -> tc_thread_waiting)
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1699
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1700 LDR r2,[r0, #4] @ Pickup thread waiting flag
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1701 CMP r2,#0 @ Are there any threads waiting?
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1702 BEQ TCT_Not_Waiting_Unpr @ If not, just release protection
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1703
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1704 @ Transfer control to the system. Note that this
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1705 @ automatically clears the current protection and it returns
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1706 @ to the caller of this routine instead of this routine.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1707 @ TCT_Control_To_System();
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1708
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1709 B TCT_Control_To_System @ Return control to the system
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1710
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1711 @ else
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1712 @ {
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1713 TCT_Not_Waiting_Unpr:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1714
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1715 @ Clear the protection.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1716 @ REG_Thread_Ptr -> tc_current_protect = NU_NULL;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1717 @ REG_Protect_Ptr -> tc_tcb_pointer = NU_NULL;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1718
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1719 MOV r2,#0 @ Build NU_NULL value
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1720 STR r2,[r0, #0] @ Release the protection
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1721 STR r2,[r3, #0x38] @ Clear protection pointer in the
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1722 @ control block
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1723
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1724 @ }
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1725
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1726 TCT_Not_Protected:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1727 @ Restore interrupts again.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1728
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1729 LDR r2,Int_Level @ Pickup address of interrupt level
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1730 MRS r1,CPSR @ Pickup current CPSR
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1731 LDR r3,[r2, #0] @ Pickup interrupt lockout level
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1732 BIC r1,r1,#LOCK_MSK @ Clear lockout bits
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1733 ORR r1,r1,r3 @ Build new interrupt lockout
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1734 MSR CPSR,r1 @ Setup CPSR appropriately
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1735
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1736 @ }
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1737 @ }
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1738 TCT_Skip_Unprotect:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1739
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1740 BX r14 @ Return to caller
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1741
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1742 @}
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1743
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1744 /*
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1745 ************************************************************************
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1746 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1747 * FUNCTION
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1748 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1749 * TCT_Unprotect_Specific
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1750 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1751 * DESCRIPTION
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1752 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1753 * This function releases a specific protection structure.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1754 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1755 * CALLED BY
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1756 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1757 * Application
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1758 * System Components
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1759 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1760 * CALLS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1761 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1762 * None
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1763 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1764 * INPUTS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1765 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1766 * protect Pointer to protection block
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1767 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1768 * OUTPUTS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1769 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1770 * None
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1771 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1772 * HISTORY
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1773 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1774 * NAME DATE REMARKS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1775 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1776 * W. Lamie 02-15-1994 Created initial version 1.0
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1777 * D. Lamie 02-15-1994 Verified version 1.0
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1778 * C. Meredith 03-01-1994 Corrected problem in time-slice
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1779 * reset logic, corrected bug
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1780 * using protect ptr, resulting
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1781 * in version 1.1
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1782 * D. Lamie 03-18-1994 Verified version 1.1
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1783 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1784 ************************************************************************
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1785 */
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1786
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1787 @VOID Specific(TC_PROTECT *protect)
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1788 @{
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1789
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1790 .globl TCT_Unprotect_Specific
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1791 TCT_Unprotect_Specific:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1792
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1793 @ Determine if the caller is in a task or HISR thread.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1794 @ if (TCD_Current_Thread)
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1795 @ {
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1796
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1797 LDR r1,Current_Thread @ Pickup current thread ptr address
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1798 LDR r3,[r1, #0] @ Pickup current thread pointer
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1799 CMP r3,#0 @ Check to see if it is non-NULL
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1800 BEQ TCT_Skip_Unprot_Spec @ If NULL, skip unprotect specific
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1801
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1802 @ Lockout interrupts.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1803
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1804 MRS r1,CPSR @ Pickup current CPSR
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1805 ORR r1,r1,#LOCKOUT @ Place lockout value in
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1806 MSR CPSR,r1 @ Lockout interrupts
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1807
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1808 @ Clear the protection pointer.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1809 @ protect -> tc_tcb_pointer = NU_NULL;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1810
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1811 MOV r2,#0 @ Build NU_NULL value
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1812 STR r2,[r0, #0] @ Clear protection ownership
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1813
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1814 @ Determine if a thread is waiting.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1815 @ if (protect -> tc_thread_waiting)
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1816 @ {
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1817
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1818 LDR r1,[r0, #4] @ Pickup the waiting field
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1819 CMP r1,#0 @ Is there another thread waiting?
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1820 BEQ TCT_Not_Waiting_Unspec @ No, restore interrupts and return
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1821
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1822 @ A higher-priority thread is waiting.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1823
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1824 @ Save a minimal context of the thread.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1825
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1826 STMDB r13!,{r4-r12,r14} @ Save minimal context of thread on
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1827 @ the current stack
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1828
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1829 #if 1 /* was .if THUMB */
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1830 MOV r2,r14 @ Determine what state the caller
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1831 MOV r2,r2,LSL #31 @ was in and build an
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1832 MOV r2,r2,LSR #26 @ appropriate state mask
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1833 STR r2,[r13, #-4]! @ Place it on the stack
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1834 #endif
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1835
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1836 MOV r2,#0 @ Build solicited stack type value
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1837 @ and NU_NULL value
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1838 STR r2,[r13, #-4]! @ Place it on the top of the stack
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1839
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1840 @ Setup a pointer to the thread control block.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1841 @ REG_Thread_Ptr = (TC_TCB *) TCD_Current_Thread;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1842
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1843 LDR r1,Current_Thread @ Pickup current thread ptr address
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1844 LDR r0,[r1, #0] @ Pickup current thread pointer
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1845
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1846 @ Clear the current thread control block pointer.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1847 @ TCD_Current_Thread = NU_NULL;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1848
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1849 LDR r3,Slice_State @ Pickup time slice state address
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1850 STR r2,[r1, #0] @ Set current thread pointer to
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1851 @ NU_NULL
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1852
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1853 @ Check to see if a time slice is active. If so, copy the
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1854 @ original time slice into the current time slice field of the
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1855 @ thread's control block.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1856 @ if (TMD_Time_Slice_State == 0)
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1857 @ {
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1858
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1859 LDR r1,[r3, #0] @ Pickup time slice state flag
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1860 CMP r1,#0 @ Compare with active value
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1861 BNE TCT_No_Stop_TS_3 @ If non-active, don't disable
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1862
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1863 @ Insure that the next time the task runs it gets a fresh time
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1864 @ slice.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1865 @ REG_Thread_Ptr -> tc_cur_time_slice =
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1866 @ REG_Thread_Ptr -> tc_time_slice;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1867
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1868 LDR r1,[r0, #0x40] @ Pickup original time slice
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1869
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1870 @ Clear any active time slice by setting the state to
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1871 @ NOT_ACTIVE.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1872 @ TMD_Time_Slice_State = 1;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1873
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1874 MOV r2,#1 @ Build disable value
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1875 STR r2,[r3, #0] @ Disable time slice
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1876 STR r1,[r0, #0x20] @ Reset current time slice
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1877 @ }
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1878
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1879 TCT_No_Stop_TS_3:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1880
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1881 @ Save off the current stack pointer in the control block.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1882 @ REG_Thread_Ptr -> tc_stack_pointer = (VOID *) REG_Stack_Ptr;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1883
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1884 STR r13,[r0, #0x2c] @ Save the thread's stack pointer
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1885
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1886 @ Switch to the system stack.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1887 @ REG_Stack_Ptr = TCD_System_Stack;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1888
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1889 LDR r1,System_Stack @ Pickup address of stack pointer
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1890 LDR r2,System_Limit @ Pickup address of stack limit ptr
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1891 LDR r13,[r1, #0] @ Switch to system stack
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1892 LDR r10,[r2, #0] @ Setup system stack limit
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1893
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1894 @ Finished, return to the scheduling loop.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1895
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1896 B TCT_Schedule @ Return to scheduling loop
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1897
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1898 @ }
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1899 @ else
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1900 @ {
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1901 TCT_Not_Waiting_Unspec:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1902
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1903 @ No higher-priority thread is waiting.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1904
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1905 @ Restore interrupts.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1906
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1907 LDR r2,Int_Level @ Pickup address of interrupt level
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1908 MRS r1,CPSR @ Pickup current CPSR
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1909 LDR r3,[r2, #0] @ Pickup interrupt lockout level
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1910 BIC r1,r1,#LOCK_MSK @ Clear lockout bits
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1911 ORR r1,r1,r3 @ Build new interrupt lockout
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1912 MSR CPSR,r1 @ Setup CPSR appropriately
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1913
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1914 @ }
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1915 @ }
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1916
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1917 TCT_Skip_Unprot_Spec:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1918
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1919 BX r14 @ Return to caller
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1920
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1921 @}
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1922
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1923 /*
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1924 ************************************************************************
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1925 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1926 * FUNCTION
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1927 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1928 * TCT_Set_Current_Protect
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1929 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1930 * DESCRIPTION
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1931 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1932 * This function sets the current protection field of the current
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1933 * thread's control block to the specified protection pointer.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1934 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1935 * CALLED BY
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1936 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1937 * TCC_Resume_Task Resume task function
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1938 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1939 * CALLS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1940 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1941 * None
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1942 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1943 * INPUTS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1944 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1945 * protect Pointer to protection block
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1946 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1947 * OUTPUTS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1948 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1949 * None
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1950 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1951 * HISTORY
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1952 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1953 * NAME DATE REMARKS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1954 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1955 * W. Lamie 02-15-1994 Created initial version 1.0
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1956 * D. Lamie 02-15-1994 Verified version 1.0
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1957 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1958 ************************************************************************
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1959 */
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1960
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1961 @VOID TCT_Set_Current_Protect(TC_PROTECT *protect)
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1962 @{
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1963
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1964 .globl TCT_Set_Current_Protect
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1965 TCT_Set_Current_Protect:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1966
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1967 @ Determine if the caller is in a task or HISR thread.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1968 @ if (TCD_Current_Thread)
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1969 @ {
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1970
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1971 LDR r1,Current_Thread @ Pickup current thread ptr address
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1972 LDR r3,[r1, #0] @ Pickup current thread pointer
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1973 CMP r3,#0 @ Check to see if a thread is
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1974 @ active
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1975
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1976 @ Point at the current thread control block.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1977 @ REG_Thread_Ptr = (TC_TCB *) TCD_Current_Thread;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1978
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1979 @ Modify the current protection.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1980 @ REG_Thread_Ptr -> tc_current_protect = protect;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1981
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1982 STRNE r0,[r3, #0x38] @ Setup new protection
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1983 @ }
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1984
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1985
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1986 BX r14 @ Return to caller
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1987
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1988 @}
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1989
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1990 /*
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1991 ************************************************************************
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1992 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1993 * FUNCTION
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1994 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1995 * TCT_Protect_Switch
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1996 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1997 * DESCRIPTION
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1998 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	1999 * This function waits until a specific task no longer has any
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2000 * protection associated with it. This is necessary since task's
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2001 * cannot be suspended or terminated unless they have released all
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2002 * of their protection.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2003 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2004 * CALLED BY
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2005 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2006 * System Components
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2007 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2008 * CALLS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2009 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2010 * None
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2011 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2012 * INPUTS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2013 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2014 * thread Pointer to thread control blk
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2015 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2016 * OUTPUTS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2017 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2018 * None
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2019 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2020 * HISTORY
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2021 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2022 * NAME DATE REMARKS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2023 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2024 * W. Lamie 02-15-1994 Created initial version 1.0
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2025 * D. Lamie 02-15-1994 Verified version 1.0
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2026 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2027 ************************************************************************
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2028 */
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2029
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2030 @VOID TCT_Protect_Switch(VOID *thread)
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2031 @{
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2032
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2033 .globl TCT_Protect_Switch
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2034 TCT_Protect_Switch:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2035
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2036 @ Lockout interrupts.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2037
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2038 MRS r1,CPSR @ Pickup current CPSR
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2039 ORR r1,r1,#LOCKOUT @ Place lockout value in
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2040 MSR CPSR,r1 @ Lockout interrupts
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2041
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2042 @ REG_Thread_Ptr = (TC_TCB *) thread;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2043
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2044 @ Wait until the specified task has no protection associated with it.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2045 @ while (REG_Thread_Ptr -> tc_current_protect)
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2046 @ {
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2047
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2048 LDR r1,[r0, #0x38] @ Pickup protection of specified
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2049 @ thread
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2050 CMP r1,#0 @ Does the specified thread have
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2051 @ an active protection?
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2052 BEQ TCT_Switch_Done @ If not, protect switch is done
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2053
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2054 @ Let the task run again in an attempt to clear its protection.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2055
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2056 @ Indicate that a higher priority thread is waiting.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2057 @ (REG_Thread_Ptr -> tc_current_protect) -> tc_thread_waiting = 1;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2058
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2059 MOV r2,#1 @ Build waiting flag value
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2060 STR r2,[r1, #4] @ Set waiting flag of the
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2061 @ protection owned by the other
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2062 @ thread
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2063
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2064 @ Directly schedule the thread waiting.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2065 @ TCT_Schedule_Protected((REG_Thread_Ptr -> tc_current_protect)
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2066 @ -> tc_tcb_pointer);
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2067
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2068 LDR r2,Current_Thread @ Pickup current thread ptr address
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2069 STR r0,[r13, #-4]! @ Save r0 on the stack
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2070 STR r14,[r13, #-4]! @ Save r14 on the stack
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2071 MOV r1,r0 @ Move new thread into r1
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2072 LDR r0,[r2, #0] @ Pickup current thread pointer
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2073 BL TCT_Schedule_Protected @ Call routine to schedule the
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2074 @ owner of the thread
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2075
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2076 LDR r14,[r13], #4 @ Recover saved r14
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2077 LDR r0,[r13], #4 @ Recover saved r0
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2078
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2079 @ Lockout interrupts.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2080
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2081 B TCT_Protect_Switch @ Branch to top of routine and
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2082 @ start over
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2083 @ }
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2084 TCT_Switch_Done:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2085
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2086 @ Restore interrupts.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2087
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2088 LDR r2,Int_Level @ Pickup address of interrupt level
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2089 MRS r1,CPSR @ Pickup current CPSR
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2090 LDR r3,[r2, #0] @ Pickup interrupt lockout level
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2091 BIC r1,r1,#LOCK_MSK @ Clear lockout bits
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2092 ORR r1,r1,r3 @ Build new interrupt lockout
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2093 MSR CPSR,r1 @ Setup CPSR appropriately
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2094
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2095
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2096 BX r14 @ Return to caller
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2097
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2098 @}
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2099
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2100 /*
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2101 ************************************************************************
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2102 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2103 * FUNCTION
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2104 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2105 * TCT_Schedule_Protected
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2106 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2107 * DESCRIPTION
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2108 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2109 * This function saves the minimal context of the thread and then
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2110 * directly schedules the thread that has protection over the
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2111 * the thread that called this routine.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2112 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2113 * CALLED BY
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2114 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2115 * TCT_Protect
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2116 * TCT_Protect_Switch
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2117 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2118 * CALLS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2119 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2120 * TCT_Control_To_Thread Transfer control to protected
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2121 * thread
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2122 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2123 * INPUTS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2124 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2125 * None
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2126 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2127 * OUTPUTS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2128 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2129 * None
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2130 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2131 * HISTORY
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2132 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2133 * NAME DATE REMARKS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2134 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2135 * W. Lamie 02-15-1994 Created initial version 1.0
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2136 * D. Lamie 02-15-1994 Verified version 1.0
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2137 * C. Meredith 03-01-1994 Corrected problem in time-slice
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2138 * reset logic, resulting in
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2139 * version 1.1
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2140 * D. Lamie 03-18-1994 Verified version 1.1
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2141 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2142 ************************************************************************
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2143 */
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2144
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2145 @VOID TCT_Schedule_Protected(VOID *thread)
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2146 @{
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2147
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2148 .globl TCT_Schedule_Protected
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2149 TCT_Schedule_Protected:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2150
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2151 @ Interrupts are already locked out by the caller.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2152
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2153 @ Save minimal context required by the system.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2154
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2155 STMDB r13!,{r4-r12,r14} @ Save minimal context of thread on
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2156 @ the current stack
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2157
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2158 #if 1 /* was .if THUMB */
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2159 MOV r2,r14 @ Determine what state the caller
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2160 MOV r2,r2,LSL #31 @ was in and build an
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2161 MOV r2,r2,LSR #26 @ appropriate state mask
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2162 STR r2,[r13, #-4]! @ Place it on the stack
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2163 #endif
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2164
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2165 MOV r2,#0 @ Build solicited stack type value
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2166 @ and NU_NULL value
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2167 STR r2,[r13, #-4]! @ Place it on the top of the stack
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2168 MOV r4,r1 @ Save thread to schedule
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2169
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2170 @ Setup a pointer to the thread control block.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2171 @ REG_Thread_Ptr = (TC_TCB *) TCD_Current_Thread;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2172
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2173 LDR r1,Current_Thread @ Pickup current thread ptr address
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2174
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2175 @ Clear the current thread control block.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2176 @ TCD_Current_Thread = NU_NULL;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2177
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2178 LDR r3,Slice_State @ Pickup time slice state address
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2179 STR r2,[r1, #0] @ Set current thread pointer to
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2180 @ NU_NULL
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2181
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2182 @ Check to see if a time slice is active. If so, copy the original time
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2183 @ slice into the current time slice field of the task's control block.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2184 @ if (TMD_Time_Slice_State == 0)
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2185 @ {
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2186
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2187 LDR r1,[r3, #0] @ Pickup time slice state flag
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2188 CMP r1,#0 @ Compare with active value
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2189 BNE TCT_No_Stop_TS_4 @ If non-active, don't disable
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2190
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2191 @ Insure that the next time the task runs it gets a fresh time
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2192 @ slice.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2193 @ REG_Thread_Ptr -> tc_cur_time_slice = REG_Thread_Ptr -> tc_time_slice;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2194
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2195 LDR r1,[r0, #0x40] @ Pickup original time slice
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2196
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2197 @ Clear any active time slice by setting the state to NOT_ACTIVE.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2198 @ TMD_Time_Slice_State = 1;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2199
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2200 MOV r2,#1 @ Build disable value
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2201 STR r2,[r3, #0] @ Disable time slice
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2202 STR r1,[r0, #0x20] @ Reset current time slice
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2203
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2204 @ }
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2205 TCT_No_Stop_TS_4:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2206
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2207 @ Save off the current stack pointer in the control block.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2208 @ REG_Thread_Ptr -> tc_stack_pointer = (VOID *) REG_Stack_Ptr;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2209
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2210 STR r13,[r0, #0x2c] @ Save the thread's stack pointer
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2211
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2212 @ Switch to the system stack.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2213 @ TCD_System_Stack = (VOID *) REG_Stack_Ptr;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2214
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2215 LDR r1,System_Stack @ Pickup address of stack pointer
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2216 LDR r2,System_Limit @ Pickup address of stack limit ptr
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2217 LDR r13,[r1, #0] @ Switch to system stack
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2218 LDR r10,[r2, #0] @ Setup system stack limit
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2219
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2220 @ Transfer control to the specified thread directly.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2221 @ TCT_Control_To_Thread(thread);
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2222
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2223 LDR r2,Int_Level @ Pickup address of interrupt level
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2224 MRS r1,CPSR @ Pickup current CPSR
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2225 LDR r3,[r2, #0] @ Pickup interrupt lockout level
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2226 BIC r1,r1,#LOCK_MSK @ Clear lockout bits
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2227 ORR r1,r1,r3 @ Build new interrupt lockout
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2228 MOV r0,r4 @ Indicate thread to schedule
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2229 MSR CPSR,r1 @ Setup CPSR appropriately
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2230 ORR r1,r1,#LOCKOUT @ Build lockout value again
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2231 MSR CPSR,r1 @ Lockout interrupts again
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2232 B TCT_Control_To_Thread @ Schedule the thread indirectly
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2233 @}
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2234
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2235 /*
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2236 ************************************************************************
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2237 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2238 * FUNCTION
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2239 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2240 * TCT_Interrupt_Context_Save
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2241 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2242 * DESCRIPTION
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2243 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2244 * This function saves the interrupted thread's context. Nested
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2245 * interrupts are also supported. If a task or HISR thread was
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2246 * interrupted, the stack pointer is switched to the system stack
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2247 * after the context is saved.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2248 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2249 * CALLED BY
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2250 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2251 * Application ISRs Assembly language ISRs
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2252 * INT_Interrupt_Shell Interrupt handler shell
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2253 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2254 * CALLS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2255 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2256 * None
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2257 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2258 * INPUTS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2259 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2260 * vector Interrupt's vector number
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2261 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2262 * OUTPUTS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2263 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2264 * None
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2265 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2266 * HISTORY
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2267 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2268 * NAME DATE REMARKS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2269 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2270 * W. Lamie 02-15-1994 Created initial version 1.0
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2271 * D. Lamie 02-15-1994 Verified version 1.0
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2272 * D. Driscoll 01-04-2002 Released version 1.13.3.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2273 * Updated to handle nested /
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2274 * prioritized IRQs
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2275 ************************************************************************
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2276 */
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2277
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2278 @VOID TCT_Interrupt_Context_Save(INT vector)
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2279 @{
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2280
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2281 .globl TCT_Interrupt_Context_Save
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2282 TCT_Interrupt_Context_Save:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2283 @ Determine if this is a nested interrupt.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2284 LDR r1,Int_Count @ Pickup address of interrupt count
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2285 LDR r2,[r1, #0] @ Pickup interrupt counter
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2286 ADD r2,r2,#1 @ Add 1 to interrupt counter
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2287 STR r2,[r1, #0] @ Store new interrupt counter value
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2288 CMP r2,#1 @ Is it nested?
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2289 BEQ TCT_Not_Nested_Save @ No
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2290
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2291 @ Nested interrupt. Save complete context on the current stack.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2292 TCT_Nested_Save:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2293
132 2c5160a9d652 nuc-fw: switched from nucdemo to Riviera, got some serial output Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: 79 diff changeset	2294 /* No longer needed in the FreeCalypso version, as we can use r0 instead. */
2c5160a9d652 nuc-fw: switched from nucdemo to Riviera, got some serial output Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: 79 diff changeset	2295 #if 0
79 947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2296 @ 1. Save another register on the exception stack so we have enough to work with
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2297 STMDB r13!,{r5}
132 2c5160a9d652 nuc-fw: switched from nucdemo to Riviera, got some serial output Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: 79 diff changeset	2298 #endif
79 947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2299
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2300 @ 2. Save the necessary exception registers into r1-r3
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2301 MOV r1,r13 @ Put the exception r13 into r1
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2302 MOV r2,r14 @ Move the return address for the caller
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2303 @ of this function into r2
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2304 MRS r3,spsr @ Put the exception spsr into r3
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2305
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2306 @ 3. Adjust the exception stack pointer for future exceptions
132 2c5160a9d652 nuc-fw: switched from nucdemo to Riviera, got some serial output Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: 79 diff changeset	2307 ADD r13,r13,#20 @ r13 reset to pre-interrupt value
79 947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2308
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2309 @ 4. Switch CPU modes to save context on system stack
132 2c5160a9d652 nuc-fw: switched from nucdemo to Riviera, got some serial output Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: 79 diff changeset	2310 MRS r0,CPSR @ Pickup the current CPSR
2c5160a9d652 nuc-fw: switched from nucdemo to Riviera, got some serial output Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: 79 diff changeset	2311 BIC r0,r0,#MODE_MASK @ Clear the mode bits
79 947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2312
132 2c5160a9d652 nuc-fw: switched from nucdemo to Riviera, got some serial output Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: 79 diff changeset	2313 ORR r0,r0,#SUP_MODE @ Change to supervisor mode (SVD)
79 947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2314
132 2c5160a9d652 nuc-fw: switched from nucdemo to Riviera, got some serial output Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: 79 diff changeset	2315 MSR CPSR,r0 @ Switch modes (IRQ->SVC)
79 947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2316
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2317 @ 5. Store the SVC r13 into r5 so the r13 can be saved as is.
132 2c5160a9d652 nuc-fw: switched from nucdemo to Riviera, got some serial output Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: 79 diff changeset	2318 @ FreeCalyspo: using r0 instead
2c5160a9d652 nuc-fw: switched from nucdemo to Riviera, got some serial output Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: 79 diff changeset	2319 MOV r0,r13
79 947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2320
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2321 @ 6. Save the exception return address on the stack (r15).
132 2c5160a9d652 nuc-fw: switched from nucdemo to Riviera, got some serial output Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: 79 diff changeset	2322 STMDB r0!,{r4}
2c5160a9d652 nuc-fw: switched from nucdemo to Riviera, got some serial output Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: 79 diff changeset	2323
2c5160a9d652 nuc-fw: switched from nucdemo to Riviera, got some serial output Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: 79 diff changeset	2324 @ 7. Save r5-r14 on stack (used to be r6-r14)
2c5160a9d652 nuc-fw: switched from nucdemo to Riviera, got some serial output Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: 79 diff changeset	2325 STMDB r0!,{r5-r14}
79 947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2326
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2327 @ 8. Switch back to using r13 now that the original r13 has been saved.
132 2c5160a9d652 nuc-fw: switched from nucdemo to Riviera, got some serial output Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: 79 diff changeset	2328 MOV r13,r0
2c5160a9d652 nuc-fw: switched from nucdemo to Riviera, got some serial output Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: 79 diff changeset	2329
2c5160a9d652 nuc-fw: switched from nucdemo to Riviera, got some serial output Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: 79 diff changeset	2330 /* no longer relevant */
2c5160a9d652 nuc-fw: switched from nucdemo to Riviera, got some serial output Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: 79 diff changeset	2331 #if 0
79 947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2332 @ 9. Get r5 and exception enable registers off of exception stack and
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2333 @ save r5 (stored in r4) back to the system stack.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2334 LDMIA r1!,{r4-r5}
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2335 STMDB r13!,{r4}
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2336 MOV r4,r5 @ Put exception enable value into r4
132 2c5160a9d652 nuc-fw: switched from nucdemo to Riviera, got some serial output Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: 79 diff changeset	2337 #endif
79 947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2338
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2339 @ 10. Get the rest of the registers off the exception stack and
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2340 @ save them onto the system stack.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2341 LDMIA r1!,{r5-r8,r11} @ Get r0-r4 off exception stack
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2342 STMDB r13!,{r5-r8,r11} @ Put r0-r4 on system stack
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2343
132 2c5160a9d652 nuc-fw: switched from nucdemo to Riviera, got some serial output Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: 79 diff changeset	2344 /* no longer relevant */
2c5160a9d652 nuc-fw: switched from nucdemo to Riviera, got some serial output Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: 79 diff changeset	2345 #if 0
79 947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2346 @ 11. Store the exception enable value back on the exception stack.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2347 STMDB r1,{r4}
132 2c5160a9d652 nuc-fw: switched from nucdemo to Riviera, got some serial output Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: 79 diff changeset	2348 #endif
79 947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2349
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2350 @ 12. Save the SPSR on the system stack (CPSR)
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2351 STMDB r13!,{r3}
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2352
132 2c5160a9d652 nuc-fw: switched from nucdemo to Riviera, got some serial output Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: 79 diff changeset	2353 /* TI's approach to interrupt handling does not support re-enabling here */
2c5160a9d652 nuc-fw: switched from nucdemo to Riviera, got some serial output Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: 79 diff changeset	2354 #if 0
79 947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2355 @ 13. Re-enable interrupts
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2356 MRS r1,CPSR
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2357 BIC r1,r1,#(IRQ_BIT_OR_FIQ_BIT)
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2358 MSR CPSR,r1
132 2c5160a9d652 nuc-fw: switched from nucdemo to Riviera, got some serial output Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: 79 diff changeset	2359 #endif
79 947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2360
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2361 BX r2 @ Return to calling ISR
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2362 @ }
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2363 @ else
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2364 @ {
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2365 TCT_Not_Nested_Save:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2366
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2367 @ Determine if a thread was interrupted.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2368 @ if (TCD_Current_Thread)
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2369 @ {
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2370
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2371 LDR r1,Current_Thread @ Pickup current thread ptr address
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2372 LDR r1,[r1, #0] @ Pickup the current thread pointer
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2373 CMP r1,#0 @ Is it NU_NULL?
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2374 BEQ TCT_Idle_Context_Save @ If no, no real save is necessary
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2375
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2376
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2377 @ Yes, a thread was interrupted. Save complete context on the
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2378 @ thread's stack.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2379
132 2c5160a9d652 nuc-fw: switched from nucdemo to Riviera, got some serial output Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: 79 diff changeset	2380 /* No longer needed in the FreeCalypso version, as we can use r0 instead. */
2c5160a9d652 nuc-fw: switched from nucdemo to Riviera, got some serial output Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: 79 diff changeset	2381 #if 0
79 947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2382 @ 1. Save another register on the exception stack so we have enough to work with
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2383 STMDB r13!,{r5}
132 2c5160a9d652 nuc-fw: switched from nucdemo to Riviera, got some serial output Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: 79 diff changeset	2384 #endif
79 947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2385
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2386 @ 2. Save the necessary exception registers into r1-r3
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2387 MOV r1,r13 @ Put the exception r13 into r1
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2388 MOV r2,r14 @ Move the return address for the caller
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2389 @ of this function into r2
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2390 MRS r3,spsr @ Put the exception spsr into r3
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2391
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2392 @ 3. Adjust the exception stack pointer for future exceptions
132 2c5160a9d652 nuc-fw: switched from nucdemo to Riviera, got some serial output Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: 79 diff changeset	2393 ADD r13,r13,#20 @ r13 reset to pre-interrupt value
79 947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2394
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2395 @ 4. Switch CPU modes to save context on system stack
132 2c5160a9d652 nuc-fw: switched from nucdemo to Riviera, got some serial output Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: 79 diff changeset	2396 MRS r0,CPSR @ Pickup the current CPSR
2c5160a9d652 nuc-fw: switched from nucdemo to Riviera, got some serial output Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: 79 diff changeset	2397 BIC r0,r0,#MODE_MASK @ Clear the mode bits
79 947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2398
132 2c5160a9d652 nuc-fw: switched from nucdemo to Riviera, got some serial output Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: 79 diff changeset	2399 ORR r0,r0,#SUP_MODE @ Change to supervisor mode (SVD)
79 947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2400
132 2c5160a9d652 nuc-fw: switched from nucdemo to Riviera, got some serial output Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: 79 diff changeset	2401 MSR CPSR,r0 @ Switch modes (IRQ->SVC)
79 947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2402
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2403 @ 5. Store the SVC r13 into r5 so the r13 can be saved as is.
132 2c5160a9d652 nuc-fw: switched from nucdemo to Riviera, got some serial output Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: 79 diff changeset	2404 @ FreeCalyspo: using r0 instead
2c5160a9d652 nuc-fw: switched from nucdemo to Riviera, got some serial output Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: 79 diff changeset	2405 MOV r0,r13
79 947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2406
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2407 @ 6. Save the exception return address on the stack (r15).
132 2c5160a9d652 nuc-fw: switched from nucdemo to Riviera, got some serial output Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: 79 diff changeset	2408 STMDB r0!,{r4}
2c5160a9d652 nuc-fw: switched from nucdemo to Riviera, got some serial output Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: 79 diff changeset	2409
2c5160a9d652 nuc-fw: switched from nucdemo to Riviera, got some serial output Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: 79 diff changeset	2410 @ 7. Save r5-r14 on stack (used to be r6-r14)
2c5160a9d652 nuc-fw: switched from nucdemo to Riviera, got some serial output Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: 79 diff changeset	2411 STMDB r0!,{r5-r14}
79 947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2412
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2413 @ 8. Switch back to using r13 now that the original r13 has been saved.
132 2c5160a9d652 nuc-fw: switched from nucdemo to Riviera, got some serial output Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: 79 diff changeset	2414 MOV r13,r0
2c5160a9d652 nuc-fw: switched from nucdemo to Riviera, got some serial output Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: 79 diff changeset	2415
2c5160a9d652 nuc-fw: switched from nucdemo to Riviera, got some serial output Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: 79 diff changeset	2416 /* no longer relevant */
2c5160a9d652 nuc-fw: switched from nucdemo to Riviera, got some serial output Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: 79 diff changeset	2417 #if 0
79 947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2418 @ 9. Get r5 and exception enable registers off of exception stack and
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2419 @ save r5 (stored in r4) back to the system stack.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2420 LDMIA r1!,{r4-r5}
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2421 STMDB r13!,{r4}
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2422 MOV r4,r5 @ Put exception enable value into r4
132 2c5160a9d652 nuc-fw: switched from nucdemo to Riviera, got some serial output Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: 79 diff changeset	2423 #endif
79 947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2424
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2425 @ 10. Get the rest of the registers off the exception stack and
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2426 @ save them onto the system stack.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2427 LDMIA r1!,{r5-r8,r11} @ Get r0-r4 off exception stack
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2428 STMDB r13!,{r5-r8,r11} @ Put r0-r4 on system stack
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2429
132 2c5160a9d652 nuc-fw: switched from nucdemo to Riviera, got some serial output Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: 79 diff changeset	2430 /* no longer relevant */
2c5160a9d652 nuc-fw: switched from nucdemo to Riviera, got some serial output Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: 79 diff changeset	2431 #if 0
79 947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2432 @ 11. Store the exception enable value back on the exception stack.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2433 STMDB r1,{r4}
132 2c5160a9d652 nuc-fw: switched from nucdemo to Riviera, got some serial output Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: 79 diff changeset	2434 #endif
79 947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2435
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2436 @ 12. Save the SPSR on the system stack (CPSR)
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2437 STMDB r13!,{r3}
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2438
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2439 @ 13. Save stack type to the task stack (1=interrupt stack)
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2440 MOV r1,#1 @ Interrupt stack type
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2441 STMDB r13!,{r1}
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2442
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2443 @ Save the thread's stack pointer in the control block.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2444 @ REG_Thread_Ptr = (TC_TCB *) TCD_Current_Thread
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2445 @ REG_Thread_Ptr -> tc_stack_pointer = (VOID *) REG_Stack_Ptr
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2446
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2447 LDR r1,Current_Thread @ Pickup current thread ptr address
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2448 LDR r3,[r1, #0] @ Pickup current thread pointer
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2449 STR r13,[r3, #TC_STACK_POINTER] @ Save stack pointer
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2450
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2451 @ Switch to the system stack.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2452 @ REG_Stack_Ptr = TCD_System_Stack
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2453
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2454 LDR r1,System_Stack @ Pickup address of stack pointer
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2455 LDR r3,System_Limit @ Pickup address of stack limit ptr
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2456 LDR r13,[r1, #0] @ Switch to system stack
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2457 LDR r10,[r3, #0] @ Setup system stack limit
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2458
132 2c5160a9d652 nuc-fw: switched from nucdemo to Riviera, got some serial output Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: 79 diff changeset	2459 /* TI's approach to interrupt handling does not support re-enabling here */
2c5160a9d652 nuc-fw: switched from nucdemo to Riviera, got some serial output Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: 79 diff changeset	2460 #if 0
79 947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2461 @ Re-enable interrupts
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2462 MRS r1,CPSR
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2463 BIC r1,r1,#(IRQ_BIT_OR_FIQ_BIT)
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2464 MSR CPSR,r1
132 2c5160a9d652 nuc-fw: switched from nucdemo to Riviera, got some serial output Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: 79 diff changeset	2465 #endif
79 947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2466
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2467 @ Return to caller ISR.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2468
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2469 BX r2 @ Return to caller ISR
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2470
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2471 @ }
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2472
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2473 TCT_Idle_Context_Save:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2474
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2475 MOV r2,r14 @ Save r14 in r2
132 2c5160a9d652 nuc-fw: switched from nucdemo to Riviera, got some serial output Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: 79 diff changeset	2476 @ LDR r3,[r13] @ Get exception enable value from stack
79 947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2477 ADD r13,r13,#20 @ Adjust exception r13 for future interrupts
132 2c5160a9d652 nuc-fw: switched from nucdemo to Riviera, got some serial output Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: 79 diff changeset	2478 @ STR r3,[r13] @ Put exception enable value back on stack
79 947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2479
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2480 MRS r1,CPSR @ Pickup current CPSR
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2481 BIC r1,r1,#MODE_MASK @ Clear the current mode
132 2c5160a9d652 nuc-fw: switched from nucdemo to Riviera, got some serial output Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: 79 diff changeset	2482 @ BIC r1,r1,#(IRQ_BIT_OR_FIQ_BIT) @ Re-enable interrupts
79 947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2483
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2484 ORR r1,r1,#SUP_MODE @ Prepare to switch to supervisor
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2485 @ mode (SVC)
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2486 MSR CPSR,r1 @ Switch to supervisor mode (SVC)
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2487
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2488 BX r2 @ Return to caller ISR
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2489
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2490 @ }
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2491 @}
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2492
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2493 /*
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2494 ************************************************************************
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2495 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2496 * FUNCTION
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2497 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2498 * TCT_Interrupt_Context_Restore
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2499 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2500 * DESCRIPTION
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2501 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2502 * This function restores the interrupt context if a nested
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2503 * interrupt condition is present. Otherwise, this routine
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2504 * transfers control to the scheduling function.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2505 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2506 * CALLED BY
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2507 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2508 * Application ISRs Assembly language ISRs
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2509 * INT_Interrupt_Shell Interrupt handler shell
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2510 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2511 * CALLS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2512 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2513 * TCT_Schedule Thread scheduling function
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2514 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2515 * INPUTS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2516 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2517 * None
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2518 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2519 * OUTPUTS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2520 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2521 * None
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2522 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2523 * HISTORY
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2524 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2525 * NAME DATE REMARKS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2526 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2527 * W. Lamie 02-15-1994 Created initial version 1.0
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2528 * D. Lamie 02-15-1994 Verified version 1.0
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2529 * D. Driscoll 01-04-2002 Released version 1.13.3.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2530 * Updated to handle nested /
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2531 * prioritized IRQs
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2532 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2533 ************************************************************************
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2534 */
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2535
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2536 @VOID TCT_Interrupt_Context_Restore(void)
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2537 @{
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2538
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2539 .globl TCT_Interrupt_Context_Restore
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2540 TCT_Interrupt_Context_Restore:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2541 @ It is assumed that anything pushed on the stack by ISRs has been
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2542 @ removed upon entry into this routine.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2543
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2544 @ Decrement and check for nested interrupt conditions.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2545 @ if (--TCD_Interrupt_Count)
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2546 @ {
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2547
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2548 LDR r1,Int_Count @ Pickup address of interrupt count
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2549 LDR r2,[r1, #0] @ Pickup interrupt counter
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2550 SUB r2,r2,#1 @ Decrement interrupt counter
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2551 STR r2,[r1, #0] @ Store interrupt counter
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2552 CMP r2,#0
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2553 BEQ TCT_Not_Nested_Restore
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2554
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2555 @ Restore previous context.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2556
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2557 LDR r1,[r13], #4 @ Pickup the saved CPSR
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2558
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2559 MSR SPSR,r1 @ Place into saved SPSR
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2560 LDMIA r13,{r0-r15}^ @ Return to the point of interrupt
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2561
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2562 @ }
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2563 @ else
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2564 @ {
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2565
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2566 TCT_Not_Nested_Restore:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2567
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2568 @ Determine if a thread is active.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2569 @ if (TCD_Current_Thread)
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2570 @ {
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2571
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2572 LDR r1,Current_Thread @ Pickup current thread ptr address
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2573 LDR r0,[r1, #0] @ Pickup current thread pointer
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2574 CMP r0,#0 @ Determine if a thread is active
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2575 BEQ TCT_Idle_Context_Restore @ If not, idle system restore
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2576
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2577 @ Clear the current thread pointer.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2578 @ TCD_Current_Thread = NU_NULL
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2579
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2580 MOV r2,#0 @ Build NU_NULL value
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2581 STR r2,[r1, #0] @ Set current thread ptr to NU_NULL
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2582
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2583 @ Determine if a time slice is active. If so, the remaining
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2584 @ time left on the time slice must be saved in the task's
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2585 @ control block.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2586 @ if (TMD_Time_Slice_State == 0)
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2587 @ {
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2588
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2589 LDR r3,Slice_State @ Pickup time slice state address
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2590 LDR r1,[r3, #0] @ Pickup time slice state
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2591 CMP r1,#0 @ Determine if time slice active
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2592 BNE TCT_Idle_Context_Restore @ If not, skip time slice reset
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2593
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2594 @ Pickup the remaining portion of the time slice and save it
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2595 @ in the task's control block.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2596 @ REG_Thread_Ptr -> tc_cur_time_slice = TMD_Time_Slice
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2597 @ TMD_Time_Slice_State = 1
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2598
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2599 LDR r2,Time_Slice @ Pickup address of time slice left
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2600 MOV r1,#1 @ Build disable time slice value
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2601 LDR r2,[r2, #0] @ Pickup remaining time slice
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2602 STR r1,[r3, #0] @ Disable time slice
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2603 STR r2,[r0, #TC_CUR_TIME_SLICE] @ Store remaining time slice
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2604
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2605 @ }
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2606 @ }
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2607 TCT_Idle_Context_Restore:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2608
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2609 @ Reset the system stack pointer.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2610 LDR r1,System_Stack @ Pickup address of stack pointer
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2611 LDR r2,System_Limit @ Pickup address of stack limit ptr
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2612 LDR r13,[r1, #0] @ Switch to system stack
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2613 LDR r10,[r2, #0] @ Setup system stack limit
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2614
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2615 @ Return to scheduler.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2616
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2617 B TCT_Schedule @ Return to scheduling loop
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2618
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2619 @ }
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2620 @}
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2621
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2622 /*
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2623 ************************************************************************
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2624 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2625 * FUNCTION
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2626 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2627 * TCT_Activate_HISR
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2628 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2629 * DESCRIPTION
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2630 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2631 * This function activates the specified HISR. If the HISR is
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2632 * already activated, the HISR's activation count is simply
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2633 * incremented. Otherwise, the HISR is placed on the appropriate
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2634 * HISR priority list in preparation for execution.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2635 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2636 * CALLED BY
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2637 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2638 * Application LISRs
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2639 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2640 * CALLS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2641 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2642 * None
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2643 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2644 * INPUTS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2645 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2646 * hisr Pointer to HISR to activate
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2647 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2648 * OUTPUTS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2649 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2650 * NU_SUCCESS Successful completion
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2651 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2652 * HISTORY
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2653 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2654 * NAME DATE REMARKS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2655 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2656 * W. Lamie 02-15-1994 Created initial version 1.0
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2657 * D. Lamie 02-15-1994 Verified version 1.0
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2658 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2659 ************************************************************************
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2660 */
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2661
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2662 @STATUS TCT_Activate_HISR(TC_HCB *hisr)
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2663 @{
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2664
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2665 .globl TCT_Activate_HISR
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2666 TCT_Activate_HISR:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2667
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2668 @INT priority;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2669
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2670
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2671 @ Lockout interrupts.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2672
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2673 STR r4,[r13, #-4]! @ Save r4
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2674 MRS r4,CPSR @ Pickup current CPSR
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2675 ORR r1,r4,#LOCKOUT @ Build interrupt lockout value
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2676 MSR CPSR,r1 @ Lockout interrupts
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2677
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2678 @ Determine if the HISR is already active.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2679 @ if (hisr -> tc_activation_count)
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2680 @ {
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2681
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2682 LDR r1,[r0,#0x40] @ Pickup current activation count
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2683 CMP r1,#0 @ Is it the first activation?
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2684 BEQ TCT_First_Activate @ Yes, place it on the correct list
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2685
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2686 @ Increment the activation count. Make sure that it does not go
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2687 @ to zero.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2688 @ hisr -> tc_activation_count++;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2689
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2690 ADDS r1,r1,#1 @ Increment the activation count
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2691 STR r1,[r0,#0x40] @ Store new activation count
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2692
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2693 @ if (hisr -> tc_activation_count == 0)
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2694
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2695 @ hisr -> tc_activation_count = 0xFFFFFFFFUL;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2696
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2697 MVNEQ r1,#0 @ If counter rolled-over reset
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2698 STREQ r1,[r0,#0x40] @ Store all ones count
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2699 B TCT_Activate_Done @ Finished with activation
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2700 @ }
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2701 @ else
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2702 @ {
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2703 TCT_First_Activate:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2704
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2705
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2706 @ Set the activation count to 1.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2707 @ hisr -> tc_activation_count = 1;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2708
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2709 MOV r1,#1 @ Initial activation count
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2710 STR r1,[r0,#0x40] @ Store initial activation count
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2711
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2712 @ Pickup the HISR's priority.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2713 @ priority = hisr -> tc_priority;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2714
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2715 @ Determine if there is something in the given priority list.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2716 @ if (TCD_Active_HISR_Tails[priority])
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2717 @ {
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2718
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2719 LDRB r1,[r0,#0x1a] @ Pickup priority of HISR
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2720 LDR r2,HISR_Tails @ Pickup tail pointer base
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2721 LDR r3,[r2,r1,LSL #2] @ Pickup tail pointer for priority
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2722 CMP r3,#0 @ Is this first HISR at priority?
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2723 BEQ TCT_First_HISR @ No, append to end of HISR list
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2724
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2725 @ Something is already on this list. Add after the tail.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2726 @ (TCD_Active_HISR_Tails[priority]) -> tc_active_next = hisr;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2727 @ TCD_Active_HISR_Tails[priority] = hisr;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2728
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2729 STR r0,[r3,#0x3c] @ Setup the active next pointer
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2730 STR r0,[r2,r1,LSL #2] @ Setup the tail pointer
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2731 B TCT_Activate_Done @ Finished with activate processing
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2732 @ }
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2733 @ else
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2734 @ {
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2735 TCT_First_HISR:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2736
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2737 @ Nothing is on this list.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2738 @ TCD_Active_HISR_Heads[priority] = hisr;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2739 @ TCD_Active_HISR_Tails[priority] = hisr;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2740
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2741 LDR r3,HISR_Heads @ Pickup address of head pointers
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2742 STR r0,[r2,r1,LSL #2] @ Set tail pointer to this HISR
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2743 STR r0,[r3,r1,LSL #2] @ Set head pointer to this HISR
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2744
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2745 @ Determine the highest priority HISR.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2746 @ if (TCD_Active_HISR_Heads[0])
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2747 @ TCD_Execute_HISR = TCD_Active_HISR_Heads[0];
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2748 @ else if (TCD_Active_HISR_Heads[1])
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2749 @ TCD_Execute_HISR = TCD_Active_HISR_Heads[1];
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2750 @ else
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2751 @ TCD_Execute_HISR = TCD_Active_HISR_Heads[2];
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2752
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2753 LDR r1,[r3,#0] @ Pickup priority 0 head pointer
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2754 LDR r0,Execute_HISR @ Build address to execute HISR ptr
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2755 CMP r1,#0 @ Is priority 0 active?
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2756 LDREQ r1,[r3,#4] @ If not, pickup priority 1 head
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2757 CMPEQ r1,#0 @ Is priority 1 active?
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2758 LDREQ r1,[r3,#8] @ Else, must be priority 2 active
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2759 STR r1,[r0,#0] @ Store which ever priority is the
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2760 @ active one
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2761 @ }
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2762 @ }
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2763 TCT_Activate_Done:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2764
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2765 MSR CPSR,r4 @ Restore interrupt lockout
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2766 LDR r4,[r13], #4 @ Restore corrupted r4
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2767
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2768 @ return(NU_SUCCESS);
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2769
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2770 MOV r0,#0 @ Always return NU_SUCCESS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2771
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2772 BX r14 @ Return to caller
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2773
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2774 @}
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2775
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2776 /*
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2777 ************************************************************************
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2778 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2779 * FUNCTION
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2780 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2781 * TCT_HISR_Shell
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2782 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2783 * DESCRIPTION
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2784 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2785 * This function is the execution shell of each and every HISR. If
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2786 * the HISR has completed its processing, this shell routine exits
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2787 * back to the system. Otherwise, it sequentially calls the HISR
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2788 * routine until the activation count goes to zero.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2789 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2790 * CALLED BY
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2791 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2792 * HISR Scheduling
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2793 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2794 * CALLS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2795 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2796 * hisr -> tc_entry Actual entry function of HISR
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2797 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2798 * INPUTS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2799 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2800 * None
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2801 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2802 * OUTPUTS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2803 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2804 * None
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2805 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2806 * HISTORY
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2807 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2808 * NAME DATE REMARKS
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2809 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2810 * W. Lamie 02-15-1994 Created initial version 1.0
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2811 * D. Lamie 02-15-1994 Verified version 1.0
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2812 *
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2813 ************************************************************************
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2814 */
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2815
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2816 @VOID TCT_HISR_Shell(void)
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2817 @{
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2818 .globl TCT_HISR_Shell
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2819 TCT_HISR_Shell:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2820
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2821 @ Point at the HISR.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2822 @ REG_HISR_Ptr = (TC_HCB *) TCD_Current_Thread;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2823
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2824 LDR r0,Current_Thread @ Build address of thread pointer
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2825 LDR r5,[r0, #0] @ Pickup control block pointer
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2826
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2827 @ do
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2828 @ {
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2829 TCT_HISR_Loop:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2830
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2831 @ Call the HISR's entry routine.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2832 @ (*(REG_HISR_Ptr -> tc_entry)) ();
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2833
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2834 /* old TMS470 code:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2835
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2836 .if THUMB = 0
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2837
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2838 MOV r14,r15 ; Setup return value
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2839 LDR r15,[r5,#44h] ; Call HISR entry function
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2840 .else
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2841 LDR r4,[r5,#44h] ; Get HISR entry function
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2842 TST r4,#1 ; See if calling Thumb or ARM
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2843 BNE Thumbsec
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2844 MOV r14,r15 ; Setup return value
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2845 BX r4
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2846 B ARMCODE
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2847 Thumbsec:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2848 ADD r14, r15, #1
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2849 BX r4
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2850 .state16
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2851 ThumbAfterHisr
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2852 MOV r1, r15
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2853 BX r1
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2854 .state32
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2855 .endif
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2856 */
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2857
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2858 /* new code for the GNU style of ARM/Thumb interworking */
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2859 ldr r4, [r5, #TC_HISR_ENTRY]
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2860 mov lr, pc
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2861 bx r4
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2862
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2863 @ Lockout interrupts.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2864
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2865 MRS r1,CPSR @ Pickup current CPSR
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2866 ORR r1,r1,#LOCKOUT @ Build interrupt lockout
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2867 MSR CPSR,r1 @ Lockout interrupts
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2868
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2869 @ On return, decrement the activation count and check to see if
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2870 @ it is 0. Once it reaches 0, the HISR should be made inactive.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2871 @ REG_HISR_Ptr -> tc_activation_count--;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2872
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2873
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2874 LDR r0,[r5, #0x40] @ Pickup current activation count
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2875 SUBS r0,r0,#1 @ Subtract and set condition codes
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2876 STR r0,[r5, #0x40] @ Store new activation count
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2877 BEQ TCT_HISR_Finished @ Finished processing HISR
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2878
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2879 @ Restore interrupts.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2880
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2881 LDR r2,Int_Level @ Pickup address of interrupt level
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2882 MRS r1,CPSR @ Pickup current CPSR
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2883 LDR r3,[r2, #0] @ Pickup interrupt lockout level
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2884 BIC r1,r1,#LOCK_MSK @ Clear lockout bits
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2885 ORR r1,r1,r3 @ Build new interrupt lockout
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2886 MSR CPSR,r1 @ Setup CPSR appropriately
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2887 B TCT_HISR_Loop @ Return to HISR loop
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2888 @ }
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2889 @ while (REG_HISR_Ptr -> tc_activation_count);
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2890
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2891 TCT_HISR_Finished:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2892
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2893 @ At this point, the HISR needs to be made inactive.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2894
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2895 @ Determine if this is the only HISR on the given priority list.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2896 @ if (REG_HISR_Ptr == TCD_Active_HISR_Tails[REG_HISR_Ptr -> tc_priority])
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2897 @ {
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2898
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2899 LDR r14,HISR_Tails @ Pickup tail pointers address
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2900 LDRB r3,[r5,#0x1a] @ Pickup priority
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2901 LDR r6,[r14,r3,LSL #2] @ Pickup this priority tail pointer
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2902 LDR r2,Execute_HISR @ Build address to execute HISR ptr
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2903 MOV r12,#0 @ Clear r12
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2904 LDR r1,HISR_Heads @ Pickup head pointers address
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2905 CMP r6,r5 @ Is this priority tail the same as
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2906 @ the current HISR?
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2907 BNE TCT_More_HISRs @ If not, more HISRs at this
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2908 @ priority
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2909
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2910 @ The only HISR on the list. Clean up the list and check for the
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2911 @ highest priority HISR.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2912 @ TCD_Active_HISR_Heads[REG_HISR_Ptr -> tc_priority] = NU_NULL;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2913 @ TCD_Active_HISR_Tails[REG_HISR_Ptr -> tc_priority] = NU_NULL;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2914
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2915 STR r12,[r1,r3,LSL #2] @ Set head pointer to NU_NULL
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2916 STR r12,[r14,r3,LSL #2] @ Set tail pointer to NU_NULL
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2917
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2918 @ Determine the highest priority HISR.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2919 @ if (TCD_Active_HISR_Heads[0])
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2920 @ TCD_Execute_HISR = TCD_Active_HISR_Heads[0];
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2921 @ else if (TCD_Active_HISR_Heads[1])
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2922 @ TCD_Execute_HISR = TCD_Active_HISR_Heads[1];
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2923 @ else
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2924 @ TCD_Execute_HISR = TCD_Active_HISR_Heads[2];
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2925
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2926 LDR r3,[r1,#0] @ Pickup priority 0 head pointer
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2927 CMP r3,#0 @ Is there an HISR active?
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2928 LDREQ r3,[r1,#4] @ If not, pickup priority 1 pointer
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2929 CMPEQ r3,#0 @ Is there an HISR active?
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2930 LDREQ r3,[r1,#8] @ If not, pickup priority 2 pointer
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2931 STR r3,[r2,#0] @ Setup execute HISR pointer
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2932 B TCT_HISR_Exit @ Exit HISR processing
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2933 @ }
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2934 @ else
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2935 @ {
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2936
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2937 TCT_More_HISRs:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2938
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2939 @ Move the head pointer to the next HISR in the list.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2940 @ TCD_Active_HISR_Heads[REG_HISR_Ptr -> tc_priority] =
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2941 @ REG_HISR_Ptr -> tc_active_next;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2942
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2943 @ Also set the TCD_Execute_HISR pointer.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2944 @ TCD_Execute_HISR = REG_HISR_Ptr -> tc_active_next;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2945
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2946 LDR r14,[r5,#0x3c] @ Pickup next HISR to activate
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2947 STR r14,[r1,r3,LSL #2] @ Setup new head pointer
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2948 STR r14,[r2, #0] @ Setup execute HISR pointer
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2949 @ }
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2950
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2951 TCT_HISR_Exit:
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2952
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2953 @ Build fake return to the top of this loop. The next time the HISR
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2954 @ is activated, it will return to the top of this function.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2955
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2956 LDR r14,HISR_Shell @ Pickup address of shell entry
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2957 STMDB r13!,{r4-r12,r14} @ Save minimal context of thread on
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2958 @ the current stack
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2959 MOV r2,#0 @ Build solicited stack type value
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2960 @ and NU_NULL value
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2961 #if 1 /* was .if THUMB */
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2962 STR r2,[r13, #-4]! @ Save state mask
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2963 #endif
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2964 STR r2,[r13, #-4]! @ Place it on the top of the stack
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2965
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2966 @ Clear the current thread control block.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2967 @ TCD_Current_Thread = NU_NULL;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2968
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2969 LDR r1,Current_Thread @ Pickup current thread ptr address
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2970 STR r2,[r1, #0] @ Set current thread pointer to
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2971 @ NU_NULL
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2972
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2973 @ Save off the current stack pointer in the control block.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2974 @ REG_HISR_Ptr -> tc_stack_pointer = (VOID *) REG_Stack_Ptr;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2975
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2976
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2977 STR r13,[r5, #0x2c] @ Save the thread's stack pointer
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2978
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2979
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2980 @ Switch to the system stack.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2981 @ REG_Stack_Ptr = (BYTE_PTR) TCD_System_Stack;
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2982
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2983 LDR r1,System_Stack @ Pickup address of stack pointer
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2984 LDR r2,System_Limit @ Pickup address of stack limit ptr
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2985 LDR r13,[r1, #0] @ Switch to system stack
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2986 LDR r10,[r2, #0] @ Setup system stack limit
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2987
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2988 @ Transfer control to the main scheduling loop.
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2989
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2990 B TCT_Schedule @ Return to main scheduling loop
947b1f473960 beginning of nuc-fw Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: diff changeset	2991 @}
132 2c5160a9d652 nuc-fw: switched from nucdemo to Riviera, got some serial output Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: 79 diff changeset	2992
2c5160a9d652 nuc-fw: switched from nucdemo to Riviera, got some serial output Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: 79 diff changeset	2993 /* FreeCalypso addition, used by riviera/rvf/rvf_task.c: */
2c5160a9d652 nuc-fw: switched from nucdemo to Riviera, got some serial output Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: 79 diff changeset	2994 .globl INT_Check_IRQ_Mask
2c5160a9d652 nuc-fw: switched from nucdemo to Riviera, got some serial output Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: 79 diff changeset	2995 INT_Check_IRQ_Mask:
2c5160a9d652 nuc-fw: switched from nucdemo to Riviera, got some serial output Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: 79 diff changeset	2996 MRS r0,CPSR
2c5160a9d652 nuc-fw: switched from nucdemo to Riviera, got some serial output Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: 79 diff changeset	2997 BX lr
2c5160a9d652 nuc-fw: switched from nucdemo to Riviera, got some serial output Michael Spacefalcon <msokolov@ivan.Harhan.ORG> parents: 79 diff changeset	2998

FreeCalypso > hg > freecalypso-sw

annotate gsm-fw/nucleus/tct.S @ 429:f114f5c547ec