From cce1f106c64dc1d19d5e9406320fde18dfc662df Mon Sep 17 00:00:00 2001 From: Shaohui Xie Date: Thu, 18 Nov 2010 14:57:32 +0800 Subject: [PATCH] powerpc/fsl_rio: move machine_check handler Add support for machine_check support into machine_check_e500 and machine_check_e500mc. Signed-off-by: Shaohui Xie Cc: Li Yang Cc: Roy Zang Cc: Alexandre Bounine Signed-off-by: Kumar Gala --- arch/powerpc/include/asm/rio.h | 5 +++++ arch/powerpc/kernel/traps.c | 13 +++++++++++++ arch/powerpc/sysdev/fsl_rio.c | 15 +++------------ 3 files changed, 21 insertions(+), 12 deletions(-) diff --git a/arch/powerpc/include/asm/rio.h b/arch/powerpc/include/asm/rio.h index 0018bf80cb25..d902abd33995 100644 --- a/arch/powerpc/include/asm/rio.h +++ b/arch/powerpc/include/asm/rio.h @@ -14,5 +14,10 @@ #define ASM_PPC_RIO_H extern void platform_rio_init(void); +#ifdef CONFIG_RAPIDIO +extern int fsl_rio_mcheck_exception(struct pt_regs *); +#else +static inline int fsl_rio_mcheck_exception(struct pt_regs *regs) {return 0; } +#endif #endif /* ASM_PPC_RIO_H */ diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c index b13306b0d925..0ff4ab98d50c 100644 --- a/arch/powerpc/kernel/traps.c +++ b/arch/powerpc/kernel/traps.c @@ -55,6 +55,7 @@ #endif #include #include +#include #if defined(CONFIG_DEBUGGER) || defined(CONFIG_KEXEC) int (*__debugger)(struct pt_regs *regs) __read_mostly; @@ -424,6 +425,12 @@ int machine_check_e500mc(struct pt_regs *regs) unsigned long reason = mcsr; int recoverable = 1; + if (reason & MCSR_BUS_RBERR) { + recoverable = fsl_rio_mcheck_exception(regs); + if (recoverable == 1) + goto silent_out; + } + printk("Machine check in kernel mode.\n"); printk("Caused by (from MCSR=%lx): ", reason); @@ -499,6 +506,7 @@ int machine_check_e500mc(struct pt_regs *regs) reason & MCSR_MEA ? "Effective" : "Physical", addr); } +silent_out: mtspr(SPRN_MCSR, mcsr); return mfspr(SPRN_MCSR) == 0 && recoverable; } @@ -507,6 +515,11 @@ int machine_check_e500(struct pt_regs *regs) { unsigned long reason = get_mc_reason(regs); + if (reason & MCSR_BUS_RBERR) { + if (fsl_rio_mcheck_exception(regs)) + return 1; + } + printk("Machine check in kernel mode.\n"); printk("Caused by (from MCSR=%lx): ", reason); diff --git a/arch/powerpc/sysdev/fsl_rio.c b/arch/powerpc/sysdev/fsl_rio.c index 49798532b477..34440e1bac18 100644 --- a/arch/powerpc/sysdev/fsl_rio.c +++ b/arch/powerpc/sysdev/fsl_rio.c @@ -260,9 +260,7 @@ struct rio_priv { static void __iomem *rio_regs_win; #ifdef CONFIG_E500 -static int (*saved_mcheck_exception)(struct pt_regs *regs); - -static int fsl_rio_mcheck_exception(struct pt_regs *regs) +int fsl_rio_mcheck_exception(struct pt_regs *regs) { const struct exception_table_entry *entry = NULL; unsigned long reason = mfspr(SPRN_MCSR); @@ -284,11 +282,9 @@ static int fsl_rio_mcheck_exception(struct pt_regs *regs) } } - if (saved_mcheck_exception) - return saved_mcheck_exception(regs); - else - return cur_cpu_spec->machine_check(regs); + return 0; } +EXPORT_SYMBOL_GPL(fsl_rio_mcheck_exception); #endif /** @@ -1538,11 +1534,6 @@ int fsl_rio_setup(struct platform_device *dev) fsl_rio_doorbell_init(port); fsl_rio_port_write_init(port); -#ifdef CONFIG_E500 - saved_mcheck_exception = ppc_md.machine_check_exception; - ppc_md.machine_check_exception = fsl_rio_mcheck_exception; -#endif - return 0; err: iounmap(priv->regs_win); -- 2.34.1