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 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 59 void _exception_handler (void) 60 { 61 puts("User vector_exception\n"); 62 hang(); 63 } 64 #endif 65