FreeCalypso > hg > fc-tourmaline
view src/nucleus/mbse.c @ 268:f2e52cab0a73
abb_inth.c: check all interrupt causes, not just one
The original code used if - else if - else if etc constructs, thus
the first detected interrupt was the only one handled. However,
Iota ITSTATREG is a clear-on-read register, thus if we only handle
the first detected interrupt and skip checking the others, then the
other interrupts will be lost, if more than one interrupt happened
to occur in one ABB interrupt handling cycle - a form of rare race
condition. Change the code to check all interrupts that were read
in this cycle.
| author | Mychaela Falconia <falcon@freecalypso.org> |
|---|---|
| date | Sun, 13 Jun 2021 18:17:53 +0000 |
| parents | 4e78acac3d88 |
| children |
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/*************************************************************************/ /* */ /* Copyright Mentor Graphics Corporation 2002 */ /* All Rights Reserved. */ /* */ /* THIS WORK CONTAINS TRADE SECRET AND PROPRIETARY INFORMATION WHICH IS */ /* THE PROPERTY OF MENTOR GRAPHICS CORPORATION OR ITS LICENSORS AND IS */ /* SUBJECT TO LICENSE TERMS. */ /* */ /*************************************************************************/ /*************************************************************************/ /* */ /* FILE NAME VERSION */ /* */ /* mbse.c Nucleus PLUS 1.14 */ /* */ /* COMPONENT */ /* */ /* MB - Mailbox Management */ /* */ /* DESCRIPTION */ /* */ /* This file contains the error checking routines for the functions */ /* in the Mailbox component. This permits easy removal of error */ /* checking logic when it is not needed. */ /* */ /* DATA STRUCTURES */ /* */ /* None */ /* */ /* FUNCTIONS */ /* */ /* MBSE_Reset_Mailbox Reset a mailbox */ /* MBSE_Receive_From_Mailbox Receive a mailbox message */ /* */ /* DEPENDENCIES */ /* */ /* cs_extr.h Common Service functions */ /* tc_extr.h Thread Control functions */ /* mb_extr.h Mailbox functions */ /* */ /* HISTORY */ /* */ /* DATE REMARKS */ /* */ /* 03-01-1994 Created initial version 1.1 from */ /* routines originally in core */ /* error checking file */ /* */ /* 03-18-1994 Verified version 1.1 */ /* 04-17-1996 updated to version 1.2 */ /* 03-24-1998 Released version 1.3 */ /* 04-17-2002 Released version 1.13m */ /* 11-07-2002 Released version 1.14 */ /*************************************************************************/ #define NU_SOURCE_FILE #include "cs_extr.h" /* Common service functions */ #include "tc_extr.h" /* Thread control functions */ #include "mb_extr.h" /* Mailbox functions */ /*************************************************************************/ /* */ /* FUNCTION */ /* */ /* MBSE_Reset_Mailbox */ /* */ /* DESCRIPTION */ /* */ /* This function performs error checking on the parameters supplied */ /* to the actual reset mailbox function. */ /* */ /* CALLED BY */ /* */ /* Application */ /* */ /* CALLS */ /* */ /* MBS_Reset_Mailbox Actual reset mailbox function*/ /* */ /* INPUTS */ /* */ /* mailbox_ptr Mailbox control block pointer*/ /* */ /* OUTPUTS */ /* */ /* NU_INVALID_MAILBOX Invalid mailbox supplied */ /* */ /* HISTORY */ /* */ /* DATE REMARKS */ /* */ /* 03-01-1993 Created initial version 1.0 */ /* 04-19-1993 Verified version 1.0 */ /* 03-01-1994 Modified interface to exactly */ /* match prototype, resulting in */ /* version 1.1 */ /* */ /* 03-18-1994 Verified version 1.1 */ /* */ /*************************************************************************/ STATUS MBSE_Reset_Mailbox(NU_MAILBOX *mailbox_ptr) { MB_MCB *mailbox; /* Mailbox control block ptr */ STATUS status; /* Completion status */ /* Move input mailbox pointer into internal pointer. */ mailbox = (MB_MCB *) mailbox_ptr; /* Determine if the mailbox pointer is valid. */ if ((mailbox) && (mailbox -> mb_id == MB_MAILBOX_ID)) /* Mailbox pointer is valid, call function to reset it. */ status = MBS_Reset_Mailbox(mailbox_ptr); else /* Mailbox pointer is invalid, indicate in completion status. */ status = NU_INVALID_MAILBOX; /* Return completion status. */ return(status); } /*************************************************************************/ /* */ /* FUNCTION */ /* */ /* MBSE_Broadcast_To_Mailbox */ /* */ /* DESCRIPTION */ /* */ /* This function performs error checking on the parameters supplied */ /* to the mailbox broadcast function. */ /* */ /* CALLED BY */ /* */ /* Application */ /* */ /* CALLS */ /* */ /* MBS_Broadcast_To_Mailbox Actual broadcast mailbox func*/ /* TCCE_Suspend_Error Check suspend validity */ /* */ /* INPUTS */ /* */ /* mailbox_ptr Mailbox control block pointer*/ /* message Pointer to message to send */ /* suspend Suspension option if full */ /* */ /* OUTPUTS */ /* */ /* NU_INVALID_MAILBOX Mailbox pointer is invalid */ /* NU_INVALID_POINTER Message pointer is invalid */ /* NU_INVALID_SUSPEND Invalid suspend request */ /* */ /* HISTORY */ /* */ /* DATE REMARKS */ /* */ /* 03-01-1993 Created initial version 1.0 */ /* 04-19-1993 Verified version 1.0 */ /* 03-01-1994 Modified interface to exactly */ /* match prototype, resulting in */ /* version 1.1 */ /* */ /* 03-18-1994 Verified version 1.1 */ /* */ /*************************************************************************/ STATUS MBSE_Broadcast_To_Mailbox(NU_MAILBOX *mailbox_ptr, VOID *message, UNSIGNED suspend) { MB_MCB *mailbox; /* Mailbox control block ptr */ STATUS status; /* Completion status */ /* Move input mailbox pointer into internal pointer. */ mailbox = (MB_MCB *) mailbox_ptr; /* Determine if mailbox pointer is invalid. */ if (mailbox == NU_NULL) /* Mailbox pointer is invalid, indicate in completion status. */ status = NU_INVALID_MAILBOX; else if (mailbox -> mb_id != MB_MAILBOX_ID) /* Mailbox pointer is invalid, indicate in completion status. */ status = NU_INVALID_MAILBOX; else if (message == NU_NULL) /* Message pointer is invalid, indicate in completion status. */ status = NU_INVALID_POINTER; else if ((suspend) && (TCCE_Suspend_Error())) /* Indicate that suspension is only valid from a task thread. */ status = NU_INVALID_SUSPEND; else /* Parameters are valid, call actual function. */ status = MBS_Broadcast_To_Mailbox(mailbox_ptr, message, suspend); /* Return the completion status. */ return(status); }