2 * (C) Copyright 2000 - 2007
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License as
9 * published by the Free Software Foundation; either version 2 of
10 * the License, or (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
22 * Derived from the MPC83xx code.
26 * This file handles the architecture-dependent parts of hardware
31 #include <asm/processor.h>
33 DECLARE_GLOBAL_DATA_PTR;
35 extern unsigned long search_exception_table(unsigned long);
37 #define END_OF_MEM (gd->bd->bi_memstart + gd->bd->bi_memsize)
40 * Trap & Exception support
44 print_backtrace (unsigned long *sp)
49 puts ("Call backtrace: ");
51 if ((uint)sp > END_OF_MEM)
59 sp = (unsigned long *) *sp;
64 void show_regs (struct pt_regs * regs)
68 printf ("NIP: %08lX XER: %08lX LR: %08lX REGS: %p TRAP: %04lx DAR: %08lX\n",
69 regs->nip, regs->xer, regs->link, regs, regs->trap, regs->dar);
70 printf ("MSR: %08lx EE: %01x PR: %01x FP: %01x ME: %01x IR/DR: %01x%01x\n",
71 regs->msr, regs->msr & MSR_EE ? 1 : 0, regs->msr & MSR_PR ? 1 : 0,
72 regs->msr & MSR_FP ? 1 : 0,regs->msr & MSR_ME ? 1 : 0,
73 regs->msr & MSR_IR ? 1 : 0,
74 regs->msr & MSR_DR ? 1 : 0);
77 for (i = 0; i < 32; i++) {
79 printf ("GPR%02d: ", i);
82 printf ("%08lX ", regs->gpr[i]);
91 _exception (int signr, struct pt_regs *regs)
94 print_backtrace ((unsigned long *)regs->gpr[1]);
95 panic ("Exception at pc %lx signal %d", regs->nip,signr);
100 MachineCheckException (struct pt_regs *regs)
104 if ((fixup = search_exception_table (regs->nip)) != 0) {
109 #if (CONFIG_COMMANDS & CFG_CMD_KGDB)
110 if (debugger_exception_handler && (*debugger_exception_handler)(regs))
114 puts ("Machine check.\nCaused by (from msr): ");
115 printf ("regs %p ",regs);
116 switch (regs->msr & 0x00FF0000) {
117 case (0x80000000 >> 10):
118 puts ("Instruction cache parity signal\n");
120 case (0x80000000 >> 11):
121 puts ("Data cache parity signal\n");
123 case (0x80000000 >> 12):
124 puts ("Machine check signal\n");
126 case (0x80000000 >> 13):
127 puts ("Transfer error ack signal\n");
129 case (0x80000000 >> 14):
130 puts ("Data parity signal\n");
132 case (0x80000000 >> 15):
133 puts ("Address parity signal\n");
136 puts ("Unknown values in msr\n");
139 print_backtrace ((unsigned long *)regs->gpr[1]);
141 panic ("machine check");
145 AlignmentException (struct pt_regs *regs)
147 #if (CONFIG_COMMANDS & CFG_CMD_KGDB)
148 if (debugger_exception_handler && (*debugger_exception_handler)(regs))
152 print_backtrace ((unsigned long *)regs->gpr[1]);
153 panic ("Alignment Exception");
157 ProgramCheckException (struct pt_regs *regs)
159 #if (CONFIG_COMMANDS & CFG_CMD_KGDB)
160 if (debugger_exception_handler && (*debugger_exception_handler)(regs))
164 print_backtrace ((unsigned long *)regs->gpr[1]);
165 panic ("Program Check Exception");
169 SoftEmuException (struct pt_regs *regs)
171 #if (CONFIG_COMMANDS & CFG_CMD_KGDB)
172 if (debugger_exception_handler && (*debugger_exception_handler)(regs))
176 print_backtrace ((unsigned long *)regs->gpr[1]);
177 panic ("Software Emulation Exception");
182 UnknownException (struct pt_regs *regs)
184 #if (CONFIG_COMMANDS & CFG_CMD_KGDB)
185 if (debugger_exception_handler && (*debugger_exception_handler)(regs))
188 printf ("Bad trap at PC: %lx, SR: %lx, vector=%lx\n",
189 regs->nip, regs->msr, regs->trap);
190 _exception (0, regs);
193 #if (CONFIG_COMMANDS & CFG_CMD_BEDBUG)
194 extern void do_bedbug_breakpoint (struct pt_regs *);
198 DebugException (struct pt_regs *regs)
200 printf ("Debugger trap at @ %lx\n", regs->nip );
202 #if (CONFIG_COMMANDS & CFG_CMD_BEDBUG)
203 do_bedbug_breakpoint (regs);