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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
line wrap: on
line source

/*************************************************************************/
/*                                                                       */
/*               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       */
/*                                                                       */
/*      erd.c                                          Nucleus PLUS 1.14 */
/*                                                                       */
/* COMPONENT                                                             */
/*                                                                       */
/*      ER - Error Management                                            */
/*                                                                       */
/* DESCRIPTION                                                           */
/*                                                                       */
/*      This file contains global data structures for use within the     */
/*      Error Management component.                                      */
/*                                                                       */
/* DATA STRUCTURES                                                       */
/*                                                                       */
/*      ERD_Error_Code                      Contains the system error    */
/*                                            code                       */
/*      ERD_Error_String                    Contains the ASCII system    */
/*                                            error string               */
/*                                                                       */
/* FUNCTIONS                                                             */
/*                                                                       */
/*      None                                                             */
/*                                                                       */
/* DEPENDENCIES                                                          */
/*                                                                       */
/*      nucleus.h                           System definitions           */
/*                                                                       */
/* HISTORY                                                               */
/*                                                                       */
/*        DATE                    REMARKS                                */
/*                                                                       */
/*      03-01-1993      Created initial version 1.0                      */
/*      04-19-1993      Verified version 1.0                             */
/*      03-01-1994      Modified copyright notice,                       */
/*                      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.                            */
/*      11-24-1998      Added ERD_Assert_Count.                          */
/*      03-26-1999      Released 1.11m (new release                      */
/*                        numbering scheme)                              */
/*      04-07-1999      Release 1.11mA                                   */
/*      04-17-2002      Released version 1.13m                           */
/*      11-07-2002      Released version 1.14                            */
/*************************************************************************/
#define         NU_SOURCE_FILE

#include        "nucleus.h"                 /* System definitions        */


/* ERD_Error_Code contains the system error code detected by the system.  */

INT     ERD_Error_Code;

#ifdef NU_DEBUG

/* ERD_Assert_Count contains the number of detected failed assertions. */
UNSIGNED ERD_Assert_Count;

#endif


#ifdef          NU_ERROR_STRING

/* ERD_Error_String is an area for building an ASCII string representation of
   the system error.  */

CHAR    ERD_Error_String[80];

#endif

#ifdef  NU_DEBUG_MEMORY

#include "er_defs.h"

/* NU_DEBUG_MEMORY wraps the calles to DMCE_Allocate_Memory and 
   DMCE_Deallocate_Memory with a set of calls that help track memory 
   problems in a memory pool.  The memory pool that will be examined
   is determined by the NU_MEMORY_POOL macro. */

/* The functions in NU_DEBUG_MEMORY require error checking.  
   NU_DEBUG_MEMORY can not be defined with NU_NO_ERROR_CHECKING */

#ifdef NU_NO_ERROR_CHECKING
#error Can not define NU_DEBUG_MEMORY and NU_NO_ERROR_CHECKING at the same time!
#endif /* NU_NO_ERROR_CHECKING */

#ifndef NU_DEBUG
#error NU_DEBUG must be defined when NU_DEBUG_MEMORY is enabled!
#endif /* NU_NO_ERROR_CHECKING */

/* ERD_AllocationCount is the current number of sucessful allocations that
        have not been deallocated.
   ERD_AllocationSequenceCounter identifies each successful allocation by 
        numbering them in the order they are created.
   ERD_TotalMemoryAllocated is the number of sucessful calls to 
        NU_Allocate_Memory.
   ERD_TotalMemoryAllocations is the sum of the sizes of each sucessful 
        allocation.
   ERD_MaxTotalMemoryAllocated is the most memory ever allocated at any
        point in time.
   ERD_MaxTotalMemoryAllocations is the most outstanding memory allocations
        (those that are not deallocated) at any point in time. */

UINT32 ERD_AllocationCount;
UINT32 ERD_AllocationSequenceCounter;
UINT32 ERD_TotalMemoryAllocated;
UINT32 ERD_TotalMemoryAllocations;
UINT32 ERD_MaxTotalMemoryAllocated;
UINT32 ERD_MaxTotalMemoryAllocations;

/* Constants to mark the header and footer */
const UINT8 ERD_MemoryAllocationHead[] = {'H','E','A','D'};
const UINT8 ERD_MemoryAllocationFoot[] = {'F','O','O','T'};

/* This is the head of a linked list that holds all the currently
   outstanding allocations in reverse chronological order.  
   RED_RecentAllocation is the most recent.  The 'prev' field always
   points to the allocation made beforehand. */
ER_DEBUG_ALLOCATION *ERD_RecentAllocation;

#endif /* NU_DEBUG_MEMORY */