FreeCalypso > hg > fc-tourmaline
view src/nucleus/io_extr.h @ 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 */ /* */ /* io_extr.h Nucleus PLUS 1.14 */ /* */ /* COMPONENT */ /* */ /* IO - Input/Output Driver Management */ /* */ /* DESCRIPTION */ /* */ /* This file contains function prototypes of all functions */ /* accessible to other components. */ /* */ /* DATA STRUCTURES */ /* */ /* None */ /* */ /* FUNCTIONS */ /* */ /* None */ /* */ /* DEPENDENCIES */ /* */ /* io_defs.h I/O Driver Management consts */ /* tc_defs.h Thread control constants */ /* */ /* HISTORY */ /* */ /* DATE REMARKS */ /* */ /* 03-01-1993 Created initial version 1.0 */ /* 04-19-1993 Verified version 1.0 */ /* 03-01-1994 Moved include files outside of */ /* the file #ifndef to allow the */ /* use of actual data structures, */ /* changed function interfaces, */ /* resulting in version 1.1 */ /* */ /* 03-18-1994 Verified version 1.1 */ /* 04-17-1996 updated to version 1.2 */ /* 03-24-1998 Released version 1.3 */ /* 03-26-1999 Released 1.11m (new release */ /* numbering scheme) */ /* 04-17-2002 Released version 1.13m */ /* 11-07-2002 Released version 1.14 */ /*************************************************************************/ #include "io_defs.h" /* Include IO constants */ #include "tc_defs.h" /* Thread control constants */ /* Check to see if the file has been included already. */ #ifndef IO_EXTR #define IO_EXTR /* Initialization functions. */ VOID IOI_Initialize(VOID); /* Error checking functions. */ STATUS IOCE_Create_Driver(NU_DRIVER *driver, CHAR *name, VOID (*driver_entry)(NU_DRIVER *, NU_DRIVER_REQUEST *)); STATUS IOCE_Delete_Driver(NU_DRIVER *driver); STATUS IOCE_Request_Driver(NU_DRIVER *driver, NU_DRIVER_REQUEST *request); STATUS IOCE_Resume_Driver(NU_TASK *task); STATUS IOCE_Suspend_Driver(VOID (*terminate_routine)(VOID *), VOID *information, UNSIGNED timeout); /* Core processing functions. */ STATUS IOC_Create_Driver(NU_DRIVER *driver, CHAR *name, VOID (*driver_entry)(NU_DRIVER *, NU_DRIVER_REQUEST *)); STATUS IOC_Delete_Driver(NU_DRIVER *driver); STATUS IOC_Request_Driver(NU_DRIVER *driver, NU_DRIVER_REQUEST *request); STATUS IOC_Resume_Driver(NU_TASK *task); STATUS IOC_Suspend_Driver(VOID (*terminate_routine)(VOID *), VOID *information, UNSIGNED timeout); /* Information retrieval functions. */ UNSIGNED IOF_Established_Drivers(VOID); UNSIGNED IOF_Driver_Pointers(NU_DRIVER **pointer_list, UNSIGNED maximum_pointers); #endif