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| author | Dave Kleikamp <shaggy@linux.vnet.ibm.com> | 2010-03-05 03:43:18 +0000 |
|---|---|---|
| committer | Josh Boyer <jwboyer@linux.vnet.ibm.com> | 2010-05-05 09:27:22 -0400 |
| commit | fc5e709731429bc2db27897630e7c0089f297680 (patch) | |
| tree | 95d3f7a7a43b549b3347318245e752f699fd8223 | |
| parent | e7f75ad01d590243904c2d95ab47e6b2e9ef6dad (diff) | |
| download | linux-stable-fc5e709731429bc2db27897630e7c0089f297680.tar.gz linux-stable-fc5e709731429bc2db27897630e7c0089f297680.tar.bz2 linux-stable-fc5e709731429bc2db27897630e7c0089f297680.zip | |
powerpc/476: add machine check handler for 47x core
The 47x core's MCSR varies from 44x, so it needs it's own machine check
handler.
Signed-off-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
| -rw-r--r-- | arch/powerpc/include/asm/cputable.h | 1 | ||||
| -rw-r--r-- | arch/powerpc/kernel/cputable.c | 1 | ||||
| -rw-r--r-- | arch/powerpc/kernel/traps.c | 40 |
3 files changed, 42 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/cputable.h b/arch/powerpc/include/asm/cputable.h index 97ab5089df67..e3cba4e1eb34 100644 --- a/arch/powerpc/include/asm/cputable.h +++ b/arch/powerpc/include/asm/cputable.h @@ -72,6 +72,7 @@ extern int machine_check_4xx(struct pt_regs *regs); extern int machine_check_440A(struct pt_regs *regs); extern int machine_check_e500(struct pt_regs *regs); extern int machine_check_e200(struct pt_regs *regs); +extern int machine_check_47x(struct pt_regs *regs); /* NOTE WELL: Update identify_cpu() if fields are added or removed! */ struct cpu_spec { diff --git a/arch/powerpc/kernel/cputable.c b/arch/powerpc/kernel/cputable.c index a1d845839727..ad6baf834a76 100644 --- a/arch/powerpc/kernel/cputable.c +++ b/arch/powerpc/kernel/cputable.c @@ -1712,6 +1712,7 @@ static struct cpu_spec __initdata cpu_specs[] = { MMU_FTR_USE_TLBIVAX_BCAST | MMU_FTR_LOCK_BCAST_INVAL, .icache_bsize = 32, .dcache_bsize = 128, + .machine_check = machine_check_47x, .platform = "ppc470", }, { /* default match */ diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c index 29d128eb6c43..ca7ce85ebc2e 100644 --- a/arch/powerpc/kernel/traps.c +++ b/arch/powerpc/kernel/traps.c @@ -380,6 +380,46 @@ int machine_check_440A(struct pt_regs *regs) } return 0; } + +int machine_check_47x(struct pt_regs *regs) +{ + unsigned long reason = get_mc_reason(regs); + u32 mcsr; + + printk(KERN_ERR "Machine check in kernel mode.\n"); + if (reason & ESR_IMCP) { + printk(KERN_ERR + "Instruction Synchronous Machine Check exception\n"); + mtspr(SPRN_ESR, reason & ~ESR_IMCP); + return 0; + } + mcsr = mfspr(SPRN_MCSR); + if (mcsr & MCSR_IB) + printk(KERN_ERR "Instruction Read PLB Error\n"); + if (mcsr & MCSR_DRB) + printk(KERN_ERR "Data Read PLB Error\n"); + if (mcsr & MCSR_DWB) + printk(KERN_ERR "Data Write PLB Error\n"); + if (mcsr & MCSR_TLBP) + printk(KERN_ERR "TLB Parity Error\n"); + if (mcsr & MCSR_ICP) { + flush_instruction_cache(); + printk(KERN_ERR "I-Cache Parity Error\n"); + } + if (mcsr & MCSR_DCSP) + printk(KERN_ERR "D-Cache Search Parity Error\n"); + if (mcsr & PPC47x_MCSR_GPR) + printk(KERN_ERR "GPR Parity Error\n"); + if (mcsr & PPC47x_MCSR_FPR) + printk(KERN_ERR "FPR Parity Error\n"); + if (mcsr & PPC47x_MCSR_IPR) + printk(KERN_ERR "Machine Check exception is imprecise\n"); + + /* Clear MCSR */ + mtspr(SPRN_MCSR, mcsr); + + return 0; +} #elif defined(CONFIG_E500) int machine_check_e500(struct pt_regs *regs) { |