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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>
hifive-unleashed-5.1
Dave Kleikamp 2010-03-05 03:43:18 +00:00 committed by Josh Boyer
parent e7f75ad01d
commit fc5e709731
3 changed files with 42 additions and 0 deletions
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1
arch/powerpc/include/asm/cputable.h
View File

@ -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 {

1
arch/powerpc/kernel/cputable.c
View File

@ -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 */

40
arch/powerpc/kernel/traps.c
View File

@ -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)
{