[POWERPC] pasemi: Machine check handler

Print out decoded machine check information on PA6T.

Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Paul Mackerras <paulus@samba.org>

diff --git a/arch/powerpc/platforms/pasemi/setup.c b/arch/powerpc/platforms/pasemi/setup.c
index 0505dd8..4142873 100644 (file)
--- a/arch/powerpc/platforms/pasemi/setup.c
+++ b/arch/powerpc/platforms/pasemi/setup.c
@@ -147,6 +147,48 @@ static void __init pas_progress(char *s, unsigned short hex)
 }
 
 
+static int pas_machine_check_handler(struct pt_regs *regs)
+{
+       int cpu = smp_processor_id();
+       unsigned long srr0, srr1, dsisr;
+
+       srr0 = regs->nip;
+       srr1 = regs->msr;
+       dsisr = mfspr(SPRN_DSISR);
+       printk(KERN_ERR "Machine Check on CPU %d\n", cpu);
+       printk(KERN_ERR "SRR0 0x%016lx SRR1 0x%016lx\n", srr0, srr1);
+       printk(KERN_ERR "DSISR 0x%016lx DAR 0x%016lx\n", dsisr, regs->dar);
+       printk(KERN_ERR "Cause:\n");
+
+       if (srr1 & 0x200000)
+               printk(KERN_ERR "Signalled by SDC\n");
+       if (srr1 & 0x100000) {
+               printk(KERN_ERR "Load/Store detected error:\n");
+               if (dsisr & 0x8000)
+                       printk(KERN_ERR "D-cache ECC double-bit error or bus error\n");
+               if (dsisr & 0x4000)
+                       printk(KERN_ERR "LSU snoop response error\n");
+               if (dsisr & 0x2000)
+                       printk(KERN_ERR "MMU SLB multi-hit or invalid B field\n");
+               if (dsisr & 0x1000)
+                       printk(KERN_ERR "Recoverable Duptags\n");
+               if (dsisr & 0x800)
+                       printk(KERN_ERR "Recoverable D-cache parity error count overflow\n");
+               if (dsisr & 0x400)
+                       printk(KERN_ERR "TLB parity error count overflow\n");
+       }
+       if (srr1 & 0x80000)
+               printk(KERN_ERR "Bus Error\n");
+       if (srr1 & 0x40000)
+               printk(KERN_ERR "I-side SLB multiple hit\n");
+       if (srr1 & 0x20000)
+               printk(KERN_ERR "I-cache parity error hit\n");
+
+       /* SRR1[62] is from MSR[62] if recoverable, so pass that back */
+       return !!(srr1 & 0x2);
+}
+
+
 /*
  * Called very early, MMU is off, device-tree isn't unflattened
  */
@@ -175,4 +217,5 @@ define_machine(pas) {
        .calibrate_decr         = generic_calibrate_decr,
        .check_legacy_ioport    = pas_check_legacy_ioport,
        .progress               = pas_progress,
+       .machine_check_exception = pas_machine_check_handler,
 };