diff options
Diffstat (limited to 'cpu/mpc85xx/traps.c')
| -rw-r--r-- | cpu/mpc85xx/traps.c | 99 |
1 files changed, 79 insertions, 20 deletions
diff --git a/cpu/mpc85xx/traps.c b/cpu/mpc85xx/traps.c index 9cd621c..efc80c7 100644 --- a/cpu/mpc85xx/traps.c +++ b/cpu/mpc85xx/traps.c @@ -1,6 +1,7 @@ /* * linux/arch/ppc/kernel/traps.c * + * Copyright 2007 Freescale Semiconductor. * Copyright (C) 2003 Motorola * Modified by Xianghua Xiao(x.xiao@motorola.com) * @@ -145,10 +146,13 @@ CritcalInputException(struct pt_regs *regs) panic("Critical Input Exception"); } +int machinecheck_count = 0; +int machinecheck_error = 0; 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 @@ -159,34 +163,62 @@ MachineCheckException(struct pt_regs *regs) 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_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 - 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"); - } + 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]); - panic("machine check"); + 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%08x\n", + regs->nip); + } else { + printf("Returning back to 0x%08x\n",regs->nip); + } } void @@ -253,6 +285,33 @@ UnknownException(struct pt_regs *regs) regs->nip, regs->msr, regs->trap); _exception(0, regs); } +void +ExtIntException(struct pt_regs *regs) +{ + volatile immap_t *immap = (immap_t *)CFG_IMMR; + volatile ccsr_pic_t *pic = &immap->im_pic; + uint vect; + +#if defined(CONFIG_CMD_KGDB) + if (debugger_exception_handler && (*debugger_exception_handler)(regs)) + return; +#endif + + printf("External Interrupt Exception at PC: %lx, SR: %lx, vector=%lx", + regs->nip, regs->msr, regs->trap); + vect = pic->iack0; + printf(" irq IACK0@%05x=%d\n",&pic->iack0,vect); + show_regs(regs); + print_backtrace((unsigned long *)regs->gpr[1]); + machinecheck_count++; +#ifdef EXTINT_NOSKIP + printf("Returning back to 0x%08x\n",regs->nip); +#else + regs->nip += 4; /* skip offending instruction */ + printf("Skipping current instr, Returning to 0x%08x\n",regs->nip); +#endif + +} void DebugException(struct pt_regs *regs) |