LXR uboot/arch/microblaze/cpu/exception.c

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * (C) Copyright 2007 Michal Simek
   4 *
   5 * Michal  SIMEK <monstr@monstr.eu>
   6 */
   7
   8#include <common.h>
   9#include <hang.h>
  10#include <asm/asm.h>
  11
  12void _hw_exception_handler (void)
  13{
  14        int address = 0;
  15        int state = 0;
  16
  17        /* loading address of exception EAR */
  18        MFS(address, rear);
  19        /* loading excetpion state register ESR */
  20        MFS(state, resr);
  21        printf("Hardware exception at 0x%x address\n", address);
  22        R17(address);
  23        printf("Return address from exception 0x%x\n", address);
  24        switch (state & 0x1f) { /* mask on exception cause */
  25        case 0x1:
  26                puts("Unaligned data access exception\n");
  27                break;
  28        case 0x2:
  29                puts("Illegal op-code exception\n");
  30                break;
  31        case 0x3:
  32                puts("Instruction bus error exception\n");
  33                break;
  34        case 0x4:
  35                puts("Data bus error exception\n");
  36                break;
  37        case 0x5:
  38                puts("Divide by zero exception\n");
  39                break;
  40#ifdef MICROBLAZE_V5
  41        case 0x7:
  42                puts("Priviledged or stack protection violation exception\n");
  43                break;
  44        case 0x1000:
  45                puts("Exception in delay slot\n");
  46                break;
  47#endif
  48        default:
  49                puts("Undefined cause\n");
  50                break;
  51        }
  52        printf("Unaligned %sword access\n", ((state & 0x800) ? "" : "half"));
  53        printf("Unaligned %s access\n", ((state & 0x400) ? "store" : "load"));
  54        printf("Register R%x\n", (state & 0x3E) >> 5);
  55        hang();
  56}
  57
  58#ifdef CONFIG_SYS_USR_EXCEP
  59void _exception_handler (void)
  60{
  61        puts("User vector_exception\n");
  62        hang();
  63}
  64#endif
  65