1 /* 2 * (C) Copyright 2007 Michal Simek 3 * 4 * Michal SIMEK <monstr@monstr.eu> 5 * 6 * See file CREDITS for list of people who contributed to this 7 * project. 8 * 9 * This program is free software; you can redistribute it and/or 10 * modify it under the terms of the GNU General Public License as 11 * published by the Free Software Foundation; either version 2 of 12 * the License, or (at your option) any later version. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * GNU General Public License for more details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with this program; if not, write to the Free Software 21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 22 * MA 02111-1307 USA 23 */ 24 25 #include <common.h> 26 #include <asm/asm.h> 27 28 void _hw_exception_handler (void) 29 { 30 int address = 0; 31 int state = 0; 32 /* loading address of exception EAR */ 33 MFS (address, rear); 34 /* loading excetpion state register ESR */ 35 MFS (state, resr); 36 printf ("Hardware exception at 0x%x address\n", address); 37 switch (state & 0x1f) { /* mask on exception cause */ 38 case 0x1: 39 puts ("Unaligned data access exception\n"); 40 break; 41 case 0x2: 42 puts ("Illegal op-code exception\n"); 43 break; 44 case 0x3: 45 puts ("Instruction bus error exception\n"); 46 break; 47 case 0x4: 48 puts ("Data bus error exception\n"); 49 break; 50 case 0x5: 51 puts ("Divide by zero exception\n"); 52 break; 53 #ifdef MICROBLAZE_V5 54 case 0x1000: 55 puts ("Exception in delay slot\n"); 56 break; 57 #endif 58 default: 59 puts ("Undefined cause\n"); 60 break; 61 } 62 printf ("Unaligned %sword access\n", ((state & 0x800) ? "" : "half")); 63 printf ("Unaligned %s access\n", ((state & 0x400) ? "store" : "load")); 64 printf ("Register R%x\n", (state & 0x3E) >> 5); 65 hang (); 66 } 67 68 #ifdef CONFIG_SYS_USR_EXCEP 69 void _exception_handler (void) 70 { 71 puts ("User vector_exception\n"); 72 hang (); 73 } 74 #endif 75