diff options
Diffstat (limited to 'arch/powerpc/kernel/traps.c')
| -rw-r--r-- | arch/powerpc/kernel/traps.c | 117 |
1 files changed, 90 insertions, 27 deletions
diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c index 3031fc7..a45a63c 100644 --- a/arch/powerpc/kernel/traps.c +++ b/arch/powerpc/kernel/traps.c @@ -1,5 +1,6 @@ /* * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org) + * Copyright 2007-2010 Freescale Semiconductor, Inc. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License @@ -54,9 +55,6 @@ #endif #include <asm/kexec.h> #include <asm/ppc-opcode.h> -#ifdef CONFIG_FSL_BOOKE -#include <asm/dbell.h> -#endif #if defined(CONFIG_DEBUGGER) || defined(CONFIG_KEXEC) int (*__debugger)(struct pt_regs *regs) __read_mostly; @@ -305,7 +303,7 @@ static inline int check_io_access(struct pt_regs *regs) #ifndef CONFIG_FSL_BOOKE #define get_mc_reason(regs) ((regs)->dsisr) #else -#define get_mc_reason(regs) (mfspr(SPRN_MCSR) & MCSR_MASK) +#define get_mc_reason(regs) (mfspr(SPRN_MCSR)) #endif #define REASON_FP ESR_FP #define REASON_ILLEGAL (ESR_PIL | ESR_PUO) @@ -421,6 +419,91 @@ int machine_check_47x(struct pt_regs *regs) return 0; } #elif defined(CONFIG_E500) +int machine_check_e500mc(struct pt_regs *regs) +{ + unsigned long mcsr = mfspr(SPRN_MCSR); + unsigned long reason = mcsr; + int recoverable = 1; + + printk("Machine check in kernel mode.\n"); + printk("Caused by (from MCSR=%lx): ", reason); + + if (reason & MCSR_MCP) + printk("Machine Check Signal\n"); + + if (reason & MCSR_ICPERR) { + printk("Instruction Cache Parity Error\n"); + + /* + * This is recoverable by invalidating the i-cache. + */ + mtspr(SPRN_L1CSR1, mfspr(SPRN_L1CSR1) | L1CSR1_ICFI); + while (mfspr(SPRN_L1CSR1) & L1CSR1_ICFI) + ; + + /* + * This will generally be accompanied by an instruction + * fetch error report -- only treat MCSR_IF as fatal + * if it wasn't due to an L1 parity error. + */ + reason &= ~MCSR_IF; + } + + if (reason & MCSR_DCPERR_MC) { + printk("Data Cache Parity Error\n"); + recoverable = 0; + } + + if (reason & MCSR_L2MMU_MHIT) { + printk("Hit on multiple TLB entries\n"); + recoverable = 0; + } + + if (reason & MCSR_NMI) + printk("Non-maskable interrupt\n"); + + if (reason & MCSR_IF) { + printk("Instruction Fetch Error Report\n"); + recoverable = 0; + } + + if (reason & MCSR_LD) { + printk("Load Error Report\n"); + recoverable = 0; + } + + if (reason & MCSR_ST) { + printk("Store Error Report\n"); + recoverable = 0; + } + + if (reason & MCSR_LDG) { + printk("Guarded Load Error Report\n"); + recoverable = 0; + } + + if (reason & MCSR_TLBSYNC) + printk("Simultaneous tlbsync operations\n"); + + if (reason & MCSR_BSL2_ERR) { + printk("Level 2 Cache Error\n"); + recoverable = 0; + } + + if (reason & MCSR_MAV) { + u64 addr; + + addr = mfspr(SPRN_MCAR); + addr |= (u64)mfspr(SPRN_MCARU) << 32; + + printk("Machine Check %s Address: %#llx\n", + reason & MCSR_MEA ? "Effective" : "Physical", addr); + } + + mtspr(SPRN_MCSR, mcsr); + return mfspr(SPRN_MCSR) == 0 && recoverable; +} + int machine_check_e500(struct pt_regs *regs) { unsigned long reason = get_mc_reason(regs); @@ -602,7 +685,7 @@ void RunModeException(struct pt_regs *regs) void __kprobes single_step_exception(struct pt_regs *regs) { - regs->msr &= ~(MSR_SE | MSR_BE); /* Turn off 'trace' bits */ + clear_single_step(regs); if (notify_die(DIE_SSTEP, "single_step", regs, 5, 5, SIGTRAP) == NOTIFY_STOP) @@ -621,10 +704,8 @@ void __kprobes single_step_exception(struct pt_regs *regs) */ static void emulate_single_step(struct pt_regs *regs) { - if (single_stepping(regs)) { - clear_single_step(regs); - _exception(SIGTRAP, regs, TRAP_TRACE, 0); - } + if (single_stepping(regs)) + single_step_exception(regs); } static inline int __parse_fpscr(unsigned long fpscr) @@ -1258,24 +1339,6 @@ void vsx_assist_exception(struct pt_regs *regs) #endif /* CONFIG_VSX */ #ifdef CONFIG_FSL_BOOKE - -void doorbell_exception(struct pt_regs *regs) -{ -#ifdef CONFIG_SMP - int cpu = smp_processor_id(); - int msg; - - if (num_online_cpus() < 2) - return; - - for (msg = 0; msg < 4; msg++) - if (test_and_clear_bit(msg, &dbell_smp_message[cpu])) - smp_message_recv(msg); -#else - printk(KERN_WARNING "Received doorbell on non-smp system\n"); -#endif -} - void CacheLockingException(struct pt_regs *regs, unsigned long address, unsigned long error_code) { |