From be24ef6e8ee48602f453bf16c7b7b708fac0eb2f Mon Sep 17 00:00:00 2001 From: Stefan Roese Date: Wed, 21 Jul 2010 19:06:26 +0200 Subject: [PATCH] ppc4xx: Add ECC status info to machine-check exception for IBM DDR2 core Signed-off-by: Stefan Roese --- arch/powerpc/cpu/ppc4xx/traps.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/arch/powerpc/cpu/ppc4xx/traps.c b/arch/powerpc/cpu/ppc4xx/traps.c index 1616772f0f..b5562ad978 100644 --- a/arch/powerpc/cpu/ppc4xx/traps.c +++ b/arch/powerpc/cpu/ppc4xx/traps.c @@ -209,6 +209,22 @@ MachineCheckException(struct pt_regs *regs) /* Clear MCSR */ mtspr(SPRN_MCSR, val); } + +#if defined(CONFIG_DDR_ECC) && defined(CONFIG_SDRAM_PPC4xx_IBM_DDR2) + /* + * Read and print ECC status register/info: + * The faulting address is only known upon uncorrectable ECC + * errors. + */ + mfsdram(SDRAM_ECCES, val); + if (val & SDRAM_ECCES_CE) + printf("ECC: Correctable error\n"); + if (val & SDRAM_ECCES_UE) { + printf("ECC: Uncorrectable error at 0x%02x%08x\n", + mfdcr(SDRAM_ERRADDULL), mfdcr(SDRAM_ERRADDLLL)); + } +#endif /* CONFIG_DDR_ECC ... */ + #if defined(CONFIG_440EPX) || defined(CONFIG_440GRX) mfsdram(DDR0_00, val) ; printf("DDR0: DDR0_00 %lx\n", val);