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 0x7: 39 puts("Priviledged or stack protection violation exception\n"); 40 break; 41 case 0x1000: 42 puts ("Exception in delay slot\n"); 43 break; 44 #endif 45 default: 46 puts ("Undefined cause\n"); 47 break; 48 } 49 printf ("Unaligned %sword access\n", ((state & 0x800) ? "" : "half")); 50 printf ("Unaligned %s access\n", ((state & 0x400) ? "store" : "load")); 51 printf ("Register R%x\n", (state & 0x3E) >> 5); 52 hang (); 53 } 54 55 #ifdef CONFIG_SYS_USR_EXCEP 56 void _exception_handler (void) 57 { 58 puts ("User vector_exception\n"); 59 hang (); 60 } 61 #endif 62