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Date: Tue, 23 Aug 2016 14:15:56 +0200 (CEST) From: Christophe Leroy <christophe.leroy@....fr> To: Benjamin Herrenschmidt <benh@...nel.crashing.org>, Paul Mackerras <paulus@...ba.org>, Michael Ellerman <mpe@...erman.id.au>, Scott Wood <oss@...error.net> Cc: linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org Subject: [PATCH] powerpc/8xx: add dedicated machine check handler Signed-off-by: Christophe Leroy <christophe.leroy@....fr> --- arch/powerpc/include/asm/cputable.h | 1 + arch/powerpc/kernel/cputable.c | 1 + arch/powerpc/kernel/traps.c | 13 +++++++++++++ 3 files changed, 15 insertions(+) diff --git a/arch/powerpc/include/asm/cputable.h b/arch/powerpc/include/asm/cputable.h index 82026b4..863b356 100644 --- a/arch/powerpc/include/asm/cputable.h +++ b/arch/powerpc/include/asm/cputable.h @@ -43,6 +43,7 @@ extern int machine_check_e500mc(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); +extern int machine_check_8xx(struct pt_regs *regs); extern void cpu_down_flush_e500v2(void); extern void cpu_down_flush_e500mc(void); diff --git a/arch/powerpc/kernel/cputable.c b/arch/powerpc/kernel/cputable.c index 74248ab..f7bee9e 100644 --- a/arch/powerpc/kernel/cputable.c +++ b/arch/powerpc/kernel/cputable.c @@ -1229,6 +1229,7 @@ static struct cpu_spec __initdata cpu_specs[] = { .mmu_features = MMU_FTR_TYPE_8xx, .icache_bsize = 16, .dcache_bsize = 16, + .machine_check = machine_check_8xx, .platform = "ppc823", }, #endif /* CONFIG_8xx */ diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c index 2cb5892..37db564 100644 --- a/arch/powerpc/kernel/traps.c +++ b/arch/powerpc/kernel/traps.c @@ -664,6 +664,19 @@ int machine_check_e200(struct pt_regs *regs) return 0; } +#elif defined(CONFIG_PPC_8xx) +int machine_check_8xx(struct pt_regs *regs) +{ + unsigned long reason = get_mc_reason(regs); + + printk("Machine check in kernel mode.\n"); + printk("Caused by (from SRR1=%lx): ", reason); + if (reason & 0x40000000) + printk("Fetch error at address %lx\n", regs->nip); + else + printk("Data access error at address %lx\n", regs->dar); + return 0; +} #else int machine_check_generic(struct pt_regs *regs) { -- 2.1.0
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