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Diffstat (limited to 'arch/ppc/cpu-85xx/traps.c')
-rw-r--r-- | arch/ppc/cpu-85xx/traps.c | 268 |
1 files changed, 0 insertions, 268 deletions
diff --git a/arch/ppc/cpu-85xx/traps.c b/arch/ppc/cpu-85xx/traps.c deleted file mode 100644 index f8e5e42290..0000000000 --- a/arch/ppc/cpu-85xx/traps.c +++ /dev/null @@ -1,268 +0,0 @@ -/* - * linux/arch/powerpc/kernel/traps.c - * - * Copyright 2007 Freescale Semiconductor. - * Copyright (C) 2003 Motorola - * Modified by Xianghua Xiao(x.xiao@motorola.com) - * - * 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. - * - */ - -/* - * This file handles the architecture-dependent parts of hardware exceptions - */ - -#include <common.h> -#include <command.h> -#include <init.h> -#include <asm/processor.h> -#include <mach/mpc85xx.h> - -int machinecheck_count; -int machinecheck_error; - -static inline void set_tsr(unsigned long val) -{ - asm volatile("mtspr 0x150, %0" : : "r" (val)); -} - -static inline unsigned long get_esr(void) -{ - unsigned long val; - asm volatile("mfspr %0, 0x03e" : "=r" (val) : ); - return val; -} - -#define ESR_MCI 0x80000000 -#define ESR_PIL 0x08000000 -#define ESR_PPR 0x04000000 -#define ESR_PTR 0x02000000 -#define ESR_DST 0x00800000 -#define ESR_DIZ 0x00400000 -#define ESR_U0F 0x00008000 - -/* - * 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 CritcalInputException(struct pt_regs *regs) -{ - panic("Critical Input Exception"); -} - -static int exception_init(void) -{ - machinecheck_count = 0; - machinecheck_error = 0; - - return 0; -} -core_initcall(exception_init); - -void MachineCheckException(struct pt_regs *regs) -{ - unsigned long fixup; - unsigned int mcsr, mcsrr0, mcsrr1, mcar; - - /* - * Probing PCI using config cycles cause this exception - * when a device is not present. Catch it and return to - * the PCI exception handler. - */ - fixup = search_exception_table(regs->nip); - if (fixup != 0) { - regs->nip = fixup; - return; - } - - mcsrr0 = mfspr(SPRN_MCSRR0); - mcsrr1 = mfspr(SPRN_MCSRR1); - mcsr = mfspr(SPRN_MCSR); - mcar = mfspr(SPRN_MCAR); - - machinecheck_count++; - machinecheck_error = 1; - -#if defined(CONFIG_KGDB) - if (debugger_exception_handler && (*debugger_exception_handler)(regs)) - return; -#endif - - printf("Machine check in kernel mode.\n"); - printf("Caused by (from mcsr): "); - printf("mcsr = 0x%08x\n", mcsr); - if (mcsr & 0x80000000) - printf("Machine check input pin\n"); - if (mcsr & 0x40000000) - printf("Instruction cache parity error\n"); - if (mcsr & 0x20000000) - printf("Data cache push parity error\n"); - if (mcsr & 0x10000000) - printf("Data cache parity error\n"); - if (mcsr & 0x00000080) - printf("Bus instruction address error\n"); - if (mcsr & 0x00000040) - printf("Bus Read address error\n"); - if (mcsr & 0x00000020) - printf("Bus Write address error\n"); - if (mcsr & 0x00000010) - printf("Bus Instruction data bus error\n"); - if (mcsr & 0x00000008) - printf("Bus Read data bus error\n"); - if (mcsr & 0x00000004) - printf("Bus Write bus error\n"); - if (mcsr & 0x00000002) - printf("Bus Instruction parity error\n"); - if (mcsr & 0x00000001) - printf("Bus Read parity error\n"); - - show_regs(regs); - printf("MCSR=0x%08x\tMCSRR0=0x%08x\nMCSRR1=0x%08x\tMCAR=0x%08x\n", - mcsr, mcsrr0, mcsrr1, mcar); - print_backtrace((unsigned long *)regs->gpr[1]); - - if (machinecheck_count > 10) - panic("machine check count too high\n"); - - if (machinecheck_count > 1) { - regs->nip += 4; /* skip offending instruction */ - printf("Skipping current instr, Returning to 0x%08lx\n", - regs->nip); - } else { - printf("Returning back to 0x%08lx\n", regs->nip); - } -} - -void AlignmentException(struct pt_regs *regs) -{ -#if defined(CONFIG_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) -{ - long esr_val; - -#if defined(CONFIG_KGDB) - if (debugger_exception_handler && (*debugger_exception_handler)(regs)) - return; -#endif - - show_regs(regs); - - esr_val = get_esr(); - if (esr_val & ESR_PIL) - printf("** Illegal Instruction **\n"); - else if (esr_val & ESR_PPR) - printf("** Privileged Instruction **\n"); - else if (esr_val & ESR_PTR) - printf("** Trap Instruction **\n"); - - print_backtrace((unsigned long *)regs->gpr[1]); - panic("Program Check Exception"); -} - -void PITException(struct pt_regs *regs) -{ - /* Reset PIT interrupt */ - set_tsr(0x0c000000); -} - -void UnknownException(struct pt_regs *regs) -{ -#if defined(CONFIG_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); -} - -void DebugException(struct pt_regs *regs) -{ - printf("Debugger trap at @ %lx\n", regs->nip); - show_regs(regs); -#if defined(CONFIG_BEDBUG) - do_bedbug_breakpoint(regs); -#endif -} |