+++ /dev/null
-/*
- * linux/arch/ppc/kernel/traps.c
- *
- * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
- *
- * Modified by Cort Dougan (cort@cs.nmt.edu)
- * and Paul Mackerras (paulus@cs.anu.edu.au)
- *
- * (C) Copyright 2000
- * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
- *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- */
-
-/*
- * This file handles the architecture-dependent parts of hardware exceptions
- */
-
-#include <common.h>
-#include <command.h>
-#include <kgdb.h>
-#include <asm/processor.h>
-
-#if defined(CONFIG_CMD_BEDBUG)
-extern void do_bedbug_breakpoint(struct pt_regs *);
-#endif
-
-/* Returns 0 if exception not found and fixup otherwise. */
-extern unsigned long search_exception_table(unsigned long);
-
-/* THIS NEEDS CHANGING to use the board info structure.
-*/
-#define END_OF_MEM 0x0001000
-
-
-/*
- * Print stack backtrace
- */
-void print_backtrace(unsigned long *sp)
-{
- int cnt = 0;
- unsigned long i;
-
- printf("Call backtrace: ");
- while (sp) {
- if ((uint)sp > END_OF_MEM)
- break;
-
- i = sp[1];
- if (cnt++ % 7 == 0)
- printf("\n");
- printf("%08lX ", i);
- if (cnt > 32) break;
- sp = (unsigned long *)*sp;
- }
- printf("\n");
-}
-
-/*
- * Print current registers
- */
-void show_regs(struct pt_regs * regs)
-{
- int i;
- printf("NIP: %08lX XER: %08lX LR: %08lX REGS: %p TRAP: %04lx DAR: %08lX\n",
- regs->nip, regs->xer, regs->link, regs, regs->trap, regs->dar);
- printf("MSR: %08lx EE: %01x PR: %01x FP: %01x ME: %01x IR/DR: %01x%01x\n",
- regs->msr, regs->msr&MSR_EE ? 1 : 0, regs->msr&MSR_PR ? 1 : 0,
- regs->msr & MSR_FP ? 1 : 0,regs->msr&MSR_ME ? 1 : 0,
- regs->msr&MSR_IR ? 1 : 0,
- regs->msr&MSR_DR ? 1 : 0);
-
- printf("\n");
- for (i = 0; i < 32; i++) {
- if ((i % 8) == 0)
- {
- printf("GPR%02d: ", i);
- }
-
- printf("%08lX ", regs->gpr[i]);
- if ((i % 8) == 7)
- {
- printf("\n");
- }
- }
-}
-
-
-/*
- * General exception handler routine
- */
-void _exception(int signr, struct pt_regs *regs)
-{
- show_regs(regs);
- print_backtrace((unsigned long *)regs->gpr[1]);
- panic("Exception in kernel pc %lx signal %d",regs->nip,signr);
-}
-
-/*
- * Machine check exception handler routine
- */
-void MachineCheckException(struct pt_regs *regs)
-{
- unsigned long fixup;
-
- /* Probing PCI using config cycles cause this exception
- * when a device is not present. Catch it and return to
- * the PCI exception handler.
- */
- if ((fixup = search_exception_table(regs->nip)) != 0) {
- regs->nip = fixup;
- return;
- }
-
-#if defined(CONFIG_CMD_KGDB)
- if (debugger_exception_handler && (*debugger_exception_handler)(regs))
- return;
-#endif
-
- printf("Machine check in kernel mode.\n");
- printf("Caused by (from msr): ");
- printf("regs %p ",regs);
- switch( regs->msr & 0x000F0000) {
- case (0x80000000>>12):
- printf("Machine check signal\n");
- break;
- case (0x80000000>>13):
- printf("Transfer error ack signal\n");
- break;
- case (0x80000000>>14):
- printf("Data parity signal\n");
- break;
- case (0x80000000>>15):
- printf("Address parity signal\n");
- break;
- default:
- printf("Unknown values in msr\n");
- }
- show_regs(regs);
- print_backtrace((unsigned long *)regs->gpr[1]);
- panic("machine check");
-}
-
-/*
- * Alignment exception handler routine
- */
-void AlignmentException(struct pt_regs *regs)
-{
-#if defined(CONFIG_CMD_KGDB)
- if (debugger_exception_handler && (*debugger_exception_handler)(regs))
- return;
-#endif
- show_regs(regs);
- print_backtrace((unsigned long *)regs->gpr[1]);
- panic("Alignment Exception");
-}
-
-/*
- * Program check exception handler routine
- */
-void ProgramCheckException(struct pt_regs *regs)
-{
-#if defined(CONFIG_CMD_KGDB)
- if (debugger_exception_handler && (*debugger_exception_handler)(regs))
- return;
-#endif
- show_regs(regs);
- print_backtrace((unsigned long *)regs->gpr[1]);
- panic("Program Check Exception");
-}
-
-/*
- * Software emulation exception handler routine
- */
-void SoftEmuException(struct pt_regs *regs)
-{
-#if defined(CONFIG_CMD_KGDB)
- if (debugger_exception_handler && (*debugger_exception_handler)(regs))
- return;
-#endif
- show_regs(regs);
- print_backtrace((unsigned long *)regs->gpr[1]);
- panic("Software Emulation Exception");
-}
-
-
-/*
- * Unknown exception handler routine
- */
-void UnknownException(struct pt_regs *regs)
-{
-#if defined(CONFIG_CMD_KGDB)
- if (debugger_exception_handler && (*debugger_exception_handler)(regs))
- return;
-#endif
- printf("Bad trap at PC: %lx, SR: %lx, vector=%lx\n",
- regs->nip, regs->msr, regs->trap);
- _exception(0, regs);
-}
-
-/*
- * Debug exception handler routine
- */
-void DebugException(struct pt_regs *regs)
-{
- printf("Debugger trap at @ %lx\n", regs->nip );
- show_regs(regs);
-#if defined(CONFIG_CMD_BEDBUG)
- do_bedbug_breakpoint( regs );
-#endif
-}
projects / u-boot / blobdiff