diff options
Diffstat (limited to 'cpu/mpc8220/traps.c')
-rw-r--r-- | cpu/mpc8220/traps.c | 236 |
1 files changed, 0 insertions, 236 deletions
diff --git a/cpu/mpc8220/traps.c b/cpu/mpc8220/traps.c deleted file mode 100644 index 4565780..0000000 --- a/cpu/mpc8220/traps.c +++ /dev/null @@ -1,236 +0,0 @@ -/* - * 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) - * fixed Machine Check Reasons by Reinhard Meyer (r.meyer@emk-elektronik.de) - * - * (C) Copyright 2000-2003 - * 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> - -/* 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 0x02000000 - -/* - * Trap & Exception support - */ - -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"); -} - -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"); - } - } -} - - -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); -} - -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); - /* refer to 603e Manual (MPC603EUM/AD), chapter 4.5.2.1 */ - switch (regs->msr & 0x000F0000) { - case (0x80000000 >> 12): - printf ("Machine check signal - probably due to mm fault\n" - "with mmu off\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"); -} - -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"); -} - -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"); -} - -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"); -} - - -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); -} - -#if defined(CONFIG_CMD_BEDBUG) -extern void do_bedbug_breakpoint (struct pt_regs *); -#endif - -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 -} - -/* Probe an address by reading. If not present, return -1, otherwise - * return 0. - */ -int addr_probe (uint * addr) -{ -#if 0 - int retval; - - __asm__ __volatile__ ("1: lwz %0,0(%1)\n" - " eieio\n" - " li %0,0\n" - "2:\n" - ".section .fixup,\"ax\"\n" - "3: li %0,-1\n" - " b 2b\n" - ".section __ex_table,\"a\"\n" - " .align 2\n" - " .long 1b,3b\n" - ".text":"=r" (retval):"r" (addr)); - - return (retval); -#endif - return 0; -} |