aboutsummaryrefslogtreecommitdiffstats
path: root/arch/powerpc/kernel/traps.c
diff options
context:
space:
mode:
authorDave Kleikamp <shaggy@linux.vnet.ibm.com>2010-03-05 03:43:18 +0000
committerJosh Boyer <jwboyer@linux.vnet.ibm.com>2010-05-05 09:27:22 -0400
commitfc5e709731429bc2db27897630e7c0089f297680 (patch)
tree95d3f7a7a43b549b3347318245e752f699fd8223 /arch/powerpc/kernel/traps.c
parente7f75ad01d590243904c2d95ab47e6b2e9ef6dad (diff)
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>
Diffstat (limited to 'arch/powerpc/kernel/traps.c')
-rw-r--r--arch/powerpc/kernel/traps.c40
1 files changed, 40 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index 29d128eb6c4..ca7ce85ebc2 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)
{