1*6260fb04SPeter Tyser /* 2*6260fb04SPeter Tyser * (C) Copyright 2007 Michal Simek 3*6260fb04SPeter Tyser * 4*6260fb04SPeter Tyser * Michal SIMEK <monstr@monstr.eu> 5*6260fb04SPeter Tyser * 6*6260fb04SPeter Tyser * See file CREDITS for list of people who contributed to this 7*6260fb04SPeter Tyser * project. 8*6260fb04SPeter Tyser * 9*6260fb04SPeter Tyser * This program is free software; you can redistribute it and/or 10*6260fb04SPeter Tyser * modify it under the terms of the GNU General Public License as 11*6260fb04SPeter Tyser * published by the Free Software Foundation; either version 2 of 12*6260fb04SPeter Tyser * the License, or (at your option) any later version. 13*6260fb04SPeter Tyser * 14*6260fb04SPeter Tyser * This program is distributed in the hope that it will be useful, 15*6260fb04SPeter Tyser * but WITHOUT ANY WARRANTY; without even the implied warranty of 16*6260fb04SPeter Tyser * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17*6260fb04SPeter Tyser * GNU General Public License for more details. 18*6260fb04SPeter Tyser * 19*6260fb04SPeter Tyser * You should have received a copy of the GNU General Public License 20*6260fb04SPeter Tyser * along with this program; if not, write to the Free Software 21*6260fb04SPeter Tyser * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 22*6260fb04SPeter Tyser * MA 02111-1307 USA 23*6260fb04SPeter Tyser */ 24*6260fb04SPeter Tyser 25*6260fb04SPeter Tyser #include <common.h> 26*6260fb04SPeter Tyser #include <asm/asm.h> 27*6260fb04SPeter Tyser 28*6260fb04SPeter Tyser void _hw_exception_handler (void) 29*6260fb04SPeter Tyser { 30*6260fb04SPeter Tyser int address = 0; 31*6260fb04SPeter Tyser int state = 0; 32*6260fb04SPeter Tyser /* loading address of exception EAR */ 33*6260fb04SPeter Tyser MFS (address, rear); 34*6260fb04SPeter Tyser /* loading excetpion state register ESR */ 35*6260fb04SPeter Tyser MFS (state, resr); 36*6260fb04SPeter Tyser printf ("Hardware exception at 0x%x address\n", address); 37*6260fb04SPeter Tyser switch (state & 0x1f) { /* mask on exception cause */ 38*6260fb04SPeter Tyser case 0x1: 39*6260fb04SPeter Tyser puts ("Unaligned data access exception\n"); 40*6260fb04SPeter Tyser break; 41*6260fb04SPeter Tyser case 0x2: 42*6260fb04SPeter Tyser puts ("Illegal op-code exception\n"); 43*6260fb04SPeter Tyser break; 44*6260fb04SPeter Tyser case 0x3: 45*6260fb04SPeter Tyser puts ("Instruction bus error exception\n"); 46*6260fb04SPeter Tyser break; 47*6260fb04SPeter Tyser case 0x4: 48*6260fb04SPeter Tyser puts ("Data bus error exception\n"); 49*6260fb04SPeter Tyser break; 50*6260fb04SPeter Tyser case 0x5: 51*6260fb04SPeter Tyser puts ("Divide by zero exception\n"); 52*6260fb04SPeter Tyser break; 53*6260fb04SPeter Tyser #ifdef MICROBLAZE_V5 54*6260fb04SPeter Tyser case 0x1000: 55*6260fb04SPeter Tyser puts ("Exception in delay slot\n"); 56*6260fb04SPeter Tyser break; 57*6260fb04SPeter Tyser #endif 58*6260fb04SPeter Tyser default: 59*6260fb04SPeter Tyser puts ("Undefined cause\n"); 60*6260fb04SPeter Tyser break; 61*6260fb04SPeter Tyser } 62*6260fb04SPeter Tyser printf ("Unaligned %sword access\n", ((state & 0x800) ? "" : "half")); 63*6260fb04SPeter Tyser printf ("Unaligned %s access\n", ((state & 0x400) ? "store" : "load")); 64*6260fb04SPeter Tyser printf ("Register R%x\n", (state & 0x3E) >> 5); 65*6260fb04SPeter Tyser hang (); 66*6260fb04SPeter Tyser } 67*6260fb04SPeter Tyser 68*6260fb04SPeter Tyser #ifdef CONFIG_SYS_USR_EXCEP 69*6260fb04SPeter Tyser void _exception_handler (void) 70*6260fb04SPeter Tyser { 71*6260fb04SPeter Tyser puts ("User vector_exception\n"); 72*6260fb04SPeter Tyser hang (); 73*6260fb04SPeter Tyser } 74*6260fb04SPeter Tyser #endif 75