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Diffstat (limited to 'cpu/ppc4xx/traps.c')
-rw-r--r--cpu/ppc4xx/traps.c49
1 files changed, 32 insertions, 17 deletions
diff --git a/cpu/ppc4xx/traps.c b/cpu/ppc4xx/traps.c
index 899cdbd..f5365cb 100644
--- a/cpu/ppc4xx/traps.c
+++ b/cpu/ppc4xx/traps.c
@@ -147,14 +147,21 @@ MachineCheckException(struct pt_regs *regs)
unsigned long fixup, val;
#if defined(CONFIG_440EPX) || defined(CONFIG_440GRX)
u32 value2;
+ int corr_ecc = 0;
+ int uncorr_ecc = 0;
#endif
- /* Probing PCI using config cycles cause this exception
- * when a device is not present. Catch it and return to
- * the PCI exception handler.
+ /* Probing PCI(E) using config cycles may cause this exception
+ * when a device is not present. To gracefully recover in such
+ * scenarios config read/write routines need to be instrumented in
+ * order to return via fixup handler. For examples refer to
+ * pcie_in_8(), pcie_in_le16() and pcie_in_le32()
*/
if ((fixup = search_exception_table(regs->nip)) != 0) {
regs->nip = fixup;
+ val = mfspr(MCSR);
+ /* Clear MCSR */
+ mtspr(SPRN_MCSR, val);
return;
}
@@ -214,14 +221,22 @@ MachineCheckException(struct pt_regs *regs)
printf("DDR0: At least one interrupt active\n");
if (val & 0x40)
printf("DDR0: DRAM initialization complete.\n");
- if (val & 0x20)
+ if (val & 0x20) {
printf("DDR0: Multiple uncorrectable ECC events.\n");
- if (val & 0x10)
+ uncorr_ecc = 1;
+ }
+ if (val & 0x10) {
printf("DDR0: Single uncorrectable ECC event.\n");
- if (val & 0x08)
+ uncorr_ecc = 1;
+ }
+ if (val & 0x08) {
printf("DDR0: Multiple correctable ECC events.\n");
- if (val & 0x04)
+ corr_ecc = 1;
+ }
+ if (val & 0x04) {
printf("DDR0: Single correctable ECC event.\n");
+ corr_ecc = 1;
+ }
if (val & 0x02)
printf("Multiple accesses outside the defined"
" physical memory space detected\n");
@@ -252,11 +267,11 @@ MachineCheckException(struct pt_regs *regs)
printf("DDR0: No DDR0 error know 0x%x %p\n", val, value2);
}
mfsdram(DDR0_23, val);
- if ( (val >> 16) & 0xff)
+ if (((val >> 16) & 0xff) && corr_ecc)
printf("DDR0: Syndrome for correctable ECC event 0x%x\n",
(val >> 16) & 0xff);
mfsdram(DDR0_23, val);
- if ( (val >> 8) & 0xff)
+ if (((val >> 8) & 0xff) && uncorr_ecc)
printf("DDR0: Syndrome for uncorrectable ECC event 0x%x\n",
(val >> 8) & 0xff);
mfsdram(DDR0_33, val);
@@ -264,28 +279,28 @@ MachineCheckException(struct pt_regs *regs)
printf("DDR0: Address of command that caused an "
"Out-of-Range interrupt %p\n", val);
mfsdram(DDR0_34, val);
- if (val)
+ if (val && uncorr_ecc)
printf("DDR0: Address of uncorrectable ECC event %p\n", val);
mfsdram(DDR0_35, val);
- if (val)
+ if (val && uncorr_ecc)
printf("DDR0: Address of uncorrectable ECC event %p\n", val);
mfsdram(DDR0_36, val);
- if (val)
+ if (val && uncorr_ecc)
printf("DDR0: Data of uncorrectable ECC event 0x%08x\n", val);
mfsdram(DDR0_37, val);
- if (val)
+ if (val && uncorr_ecc)
printf("DDR0: Data of uncorrectable ECC event 0x%08x\n", val);
mfsdram(DDR0_38, val);
- if (val)
+ if (val && corr_ecc)
printf("DDR0: Address of correctable ECC event %p\n", val);
mfsdram(DDR0_39, val);
- if (val)
+ if (val && corr_ecc)
printf("DDR0: Address of correctable ECC event %p\n", val);
mfsdram(DDR0_40, val);
- if (val)
+ if (val && corr_ecc)
printf("DDR0: Data of correctable ECC event 0x%08x\n", val);
mfsdram(DDR0_41, val);
- if (val)
+ if (val && corr_ecc)
printf("DDR0: Data of correctable ECC event 0x%08x\n", val);
#endif /* CONFIG_440EPX */
#endif /* CONFIG_440 */