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 R17(address); 22 printf("Return address from exception 0x%x\n", address); 23 switch (state & 0x1f) { /* mask on exception cause */ 24 case 0x1: 25 puts ("Unaligned data access exception\n"); 26 break; 27 case 0x2: 28 puts ("Illegal op-code exception\n"); 29 break; 30 case 0x3: 31 puts ("Instruction bus error exception\n"); 32 break; 33 case 0x4: 34 puts ("Data bus error exception\n"); 35 break; 36 case 0x5: 37 puts ("Divide by zero exception\n"); 38 break; 39 #ifdef MICROBLAZE_V5 40 case 0x7: 41 puts("Priviledged or stack protection violation exception\n"); 42 break; 43 case 0x1000: 44 puts ("Exception in delay slot\n"); 45 break; 46 #endif 47 default: 48 puts ("Undefined cause\n"); 49 break; 50 } 51 printf ("Unaligned %sword access\n", ((state & 0x800) ? "" : "half")); 52 printf ("Unaligned %s access\n", ((state & 0x400) ? "store" : "load")); 53 printf ("Register R%x\n", (state & 0x3E) >> 5); 54 hang (); 55 } 56 57 #ifdef CONFIG_SYS_USR_EXCEP 58 void _exception_handler (void) 59 { 60 puts ("User vector_exception\n"); 61 hang (); 62 } 63 #endif 64