annotate gsm-fw/nucleus/tct.S @ 484:c617a6adcb69

top level README: status update
author Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
date Sun, 29 Jun 2014 19:05:52 +0000
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1 /*
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2 ************************************************************************
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3 *
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4 * Copyright Mentor Graphics Corporation 2002
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5 * All Rights Reserved.
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6 *
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7 * THIS WORK CONTAINS TRADE SECRET AND PROPRIETARY INFORMATION WHICH IS
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8 * THE PROPERTY OF MENTOR GRAPHICS CORPORATION OR ITS LICENSORS AND IS
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9 * SUBJECT TO LICENSE TERMS.
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10 *
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11 ************************************************************************
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12 ************************************************************************
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13 *
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14 * FILE NAME VERSION
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15 *
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16 * tct.s Nucleus PLUS\ARM925\Code Composer 1.14.1
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17 *
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18 * COMPONENT
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19 *
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20 * TC - Thread Control
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21 *
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22 * DESCRIPTION
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23 *
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24 * This file contains the target processor dependent routines for
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25 * performing target-dependent scheduling functions.
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26 *
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27 * FUNCTIONS
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28 *
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29 * TCT_Control_Interrupts Enable / disable interrupts
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30 * by changing
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31 * TCD_Interrupt_Level
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32 * TCT_Local_Control_Interrupts Enable/disable interrupts
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33 * by not changing
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34 * TCD_Interrupt_Level
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35 * TCT_Restore_Interrupts Restores interrupts to the
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36 * level in TCD_Interrupt_Level
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37 * TCT_Build_Task_Stack Build initial task stack
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38 * TCT_Build_HISR_Stack Build initial HISR stack
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39 * TCT_Build_Signal_Frame Build signal handler frame
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40 * TCT_Check_Stack Check current stack
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41 * TCT_Schedule Schedule the next thread
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42 * TCT_Control_To_Thread Transfer control to a thread
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43 * TCT_Control_To_System Transfer control from thread
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44 * TCT_Signal_Exit Exit from signal handler
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45 * TCT_Current_Thread Returns a pointer to current
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46 * thread
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47 * TCT_Set_Execute_Task Sets TCD_Execute_Task under
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48 * protection from interrupts
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49 * TCT_Protect Protect critical section
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50 * TCT_Unprotect Unprotect critical section
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51 * TCT_Unprotect_Specific Release specific protection
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52 * TCT_Set_Current_Protect Set the thread's current
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53 * protection field
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54 * TCT_Protect_Switch Switch to protected thread
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55 * TCT_Schedule_Protected Schedule the protected thread
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56 * TCT_Interrupt_Context_Save Save interrupted context
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57 * TCT_Interrupt_Context_Restore Restore interrupted context
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58 * TCT_Activate_HISR Activate a HISR
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59 * TCT_HISR_Shell HISR execution shell
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60 *
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61 * DEPENDENCIES
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62 *
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63 * cs_extr.h Common Service functions
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64 * tc_extr.h Thread Control functions
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65 *
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66 * HISTORY
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67 *
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68 * NAME DATE REMARKS
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69 *
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70 * B. Ronquillo 08-28-2002 Released version 1.14.1
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71 *
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72 ************************************************************************
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73 */
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74
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75 #define NU_SOURCE_FILE
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76
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77 /*
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78 ******************************
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79 * INCLUDE ASSEMBLY CONSTANTS *
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80 ******************************
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81 * Define constants used in low-level initialization.
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82 */
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83
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84 #include "asm_defs.h"
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85
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86 .code 32
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87
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88 /* TCT_System_Limit is a global variable defined in this module */
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89
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90 .comm TCT_System_Limit,4,4
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91
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92 .text
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93
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94 /*
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95 **********************************
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96 * LOCAL VARIABLE DECLARATIONS *
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97 **********************************
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98 * Define pointers to system variables so their addresses may be obtained in a
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99 * pc-relative manner.
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100 */
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101
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102 System_Limit:
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103 .word TCT_System_Limit
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104
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105 Int_Level:
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106 .word TCD_Interrupt_Level
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107
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108 Task_Shell:
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109 .word TCC_Task_Shell
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110
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111 HISR_Shell:
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112 .word TCT_HISR_Shell
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113
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114 Signal_Shell:
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115 .word TCC_Signal_Shell
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116
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117 Current_Thread:
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118 .word TCD_Current_Thread
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119
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120 Execute_HISR:
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121 .word TCD_Execute_HISR
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122
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123 Execute_Task:
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124 .word TCD_Execute_Task
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125
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126 Time_Slice:
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127 .word TMD_Time_Slice
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128
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129 Slice_State:
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130 .word TMD_Time_Slice_State
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131
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132 System_Stack:
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133 .word TCD_System_Stack
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134
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135 Int_Count:
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136 .word TCD_Interrupt_Count
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137
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138 HISR_Tails:
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139 .word TCD_Active_HISR_Tails
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140
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141 HISR_Heads:
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142 .word TCD_Active_HISR_Heads
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143
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144 /*
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145 ************************************************************************
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146 *
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147 * FUNCTION
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148 *
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149 * TCT_Control_Interrupts
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
150 *
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
151 * DESCRIPTION
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
152 *
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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
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
155 * until the another call is made to enable them.
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
156 *
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
157 * CALLED BY
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
158 *
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
159 * Application
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
160 *
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
161 * CALLS
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
162 *
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
163 * None
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
164 *
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
165 * INPUTS
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
166 *
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
167 * new_level New interrupt enable level
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
168 *
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
169 * OUTPUTS
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
170 *
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
171 * old_level Previous interrupt enable
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
172 * level
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
173 *
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
174 * HISTORY
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
175 *
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
176 * NAME DATE REMARKS
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
177 *
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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
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
180 * C. Meredith 03-01-1994 Lockout interrupts while setting
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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
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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
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
185 * return the interrupt bits.
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
186 * (SPR0252)
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
187 *
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
188 ************************************************************************
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
189 */
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
190
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
191 @INT TCT_Control_Interrupts (INT new_level)
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
192 @{
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
193
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
194 .globl TCT_Control_Interrupts
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
195 TCT_Control_Interrupts:
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
196
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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
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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
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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
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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
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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
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
219 @ interrupts locked out
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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
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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
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
226 @}
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
227
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
228 /*
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
229 ************************************************************************
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
230 *
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
231 * FUNCTION
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
232 *
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
233 * TCT_Local_Control_Interrupts
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
234 *
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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 *
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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 *
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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 *
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
244 * CALLS
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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
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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 *
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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
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
255 * level
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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
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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