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authorNiklaus Giger <niklaus.giger@nestal.com>2007-06-25 17:03:13 +0200
committerStefan Roese <sr@denx.de>2007-06-25 17:03:13 +0200
commita1bd6200eccd3a02040a955d5f43d3ee1fc9f93b (patch)
treef33e30b395a710c684d6728409ed1d0c87fc5824
parent807018fb7faceb429ce0cb47baa2073746b33a4e (diff)
downloadu-boot-linaro-stable-a1bd6200eccd3a02040a955d5f43d3ee1fc9f93b.tar.gz
ppc4xx: PPC440EPx Emit DDR0 registers on machine check interrupt
This patch prints the DDR status registers upon machine check interrupt on the 440EPx/GRx. This can be useful especially when ECC support is enabled. I added some small changes to the original patch from Niklaus to make it compile clean. Signed-off-by: Niklaus Giger <niklaus.giger@nestal.com> Signed-off-by: Stefan Roese <sr@denx.de>
-rwxr-xr-x[-rw-r--r--]cpu/ppc4xx/traps.c87
1 files changed, 86 insertions, 1 deletions
diff --git a/cpu/ppc4xx/traps.c b/cpu/ppc4xx/traps.c
index 7c44a2990..eb9420e57 100644..100755
--- a/cpu/ppc4xx/traps.c
+++ b/cpu/ppc4xx/traps.c
@@ -145,6 +145,9 @@ void
MachineCheckException(struct pt_regs *regs)
{
unsigned long fixup, val;
+#if defined(CONFIG_440EPX) || defined(CONFIG_440GRX)
+ u32 value2;
+#endif
/* Probing PCI using config cycles cause this exception
* when a device is not present. Catch it and return to
@@ -203,7 +206,89 @@ MachineCheckException(struct pt_regs *regs)
/* Clear MCSR */
mtspr(SPRN_MCSR, val);
}
-#endif
+#if defined(CONFIG_440EPX) || defined(CONFIG_440GRX)
+ mfsdram(DDR0_00, val) ;
+ printf("DDR0: DDR0_00 %p\n", val);
+ val = (val >> 16) & 0xff;
+ if (val & 0x80)
+ printf("DDR0: At least one interrupt active\n");
+ if (val & 0x40)
+ printf("DDR0: DRAM initialization complete.\n");
+ if (val & 0x20)
+ printf("DDR0: Multiple uncorrectable ECC events.\n");
+ if (val & 0x10)
+ printf("DDR0: Single uncorrectable ECC event.\n");
+ if (val & 0x08)
+ printf("DDR0: Multiple correctable ECC events.\n");
+ if (val & 0x04)
+ printf("DDR0: Single correctable ECC event.\n");
+ if (val & 0x02)
+ printf("Multiple accesses outside the defined"
+ " physical memory space detected\n");
+ if (val & 0x01)
+ printf("DDR0: Single access outside the defined"
+ " physical memory space detected.\n");
+
+ mfsdram(DDR0_01, val);
+ val = (val >> 8) & 0x7;
+ switch (val ) {
+ case 0:
+ printf("DDR0: Write Out-of-Range command\n");
+ break;
+ case 1:
+ printf("DDR0: Read Out-of-Range command\n");
+ break;
+ case 2:
+ printf("DDR0: Masked write Out-of-Range command\n");
+ break;
+ case 4:
+ printf("DDR0: Wrap write Out-of-Range command\n");
+ break;
+ case 5:
+ printf("DDR0: Wrap read Out-of-Range command\n");
+ break;
+ default:
+ mfsdram(DDR0_01, value2);
+ printf("DDR0: No DDR0 error know 0x%x %p\n", val, value2);
+ }
+ mfsdram(DDR0_23, val);
+ if ( (val >> 16) & 0xff)
+ printf("DDR0: Syndrome for correctable ECC event 0x%x\n",
+ (val >> 16) & 0xff);
+ mfsdram(DDR0_23, val);
+ if ( (val >> 8) & 0xff)
+ printf("DDR0: Syndrome for uncorrectable ECC event 0x%x\n",
+ (val >> 8) & 0xff);
+ mfsdram(DDR0_33, val);
+ if (val)
+ printf("DDR0: Address of command that caused an "
+ "Out-of-Range interrupt %p\n", val);
+ mfsdram(DDR0_34, val);
+ if (val)
+ printf("DDR0: Address of uncorrectable ECC event %p\n", val);
+ mfsdram(DDR0_35, val);
+ if (val)
+ printf("DDR0: Address of uncorrectable ECC event %p\n", val);
+ mfsdram(DDR0_36, val);
+ if (val)
+ printf("DDR0: Data of uncorrectable ECC event 0x%08x\n", val);
+ mfsdram(DDR0_37, val);
+ if (val)
+ printf("DDR0: Data of uncorrectable ECC event 0x%08x\n", val);
+ mfsdram(DDR0_38, val);
+ if (val)
+ printf("DDR0: Address of correctable ECC event %p\n", val);
+ mfsdram(DDR0_39, val);
+ if (val)
+ printf("DDR0: Address of correctable ECC event %p\n", val);
+ mfsdram(DDR0_40, val);
+ if (val)
+ printf("DDR0: Data of correctable ECC event 0x%08x\n", val);
+ mfsdram(DDR0_41, val);
+ if (val)
+ printf("DDR0: Data of correctable ECC event 0x%08x\n", val);
+#endif /* CONFIG_440EPX */
+#endif /* CONFIG_440 */
show_regs(regs);
print_backtrace((unsigned long *)regs->gpr[1]);
panic("machine check");