arch/microblaze/cpu/exception.c

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