Blackfin: decode hwerrcause/excause when crashing
Having to decode hwerrcause/excause values is a pain, so automate it.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
diff --git a/cpu/blackfin/traps.c b/cpu/blackfin/traps.c
index 5a26c52..d17c0a1 100644
--- a/cpu/blackfin/traps.c
+++ b/cpu/blackfin/traps.c
@@ -236,10 +236,45 @@
sprintf(buf, "<0x%p> /* unknown address */", address);
}
+static char *strhwerrcause(uint16_t hwerrcause)
+{
+ switch (hwerrcause) {
+ case 0x02: return "system mmr error";
+ case 0x03: return "external memory addressing error";
+ case 0x12: return "performance monitor overflow";
+ case 0x18: return "raise 5 instruction";
+ default: return "undef";
+ }
+}
+
+static char *strexcause(uint16_t excause)
+{
+ switch (excause) {
+ case 0x00 ... 0xf: return "custom exception";
+ case 0x10: return "single step";
+ case 0x11: return "trace buffer full";
+ case 0x21: return "undef inst";
+ case 0x22: return "illegal inst";
+ case 0x23: return "dcplb prot violation";
+ case 0x24: return "misaligned data";
+ case 0x25: return "unrecoverable event";
+ case 0x26: return "dcplb miss";
+ case 0x27: return "multiple dcplb hit";
+ case 0x28: return "emulation watchpoint";
+ case 0x2a: return "misaligned inst";
+ case 0x2b: return "icplb prot violation";
+ case 0x2c: return "icplb miss";
+ case 0x2d: return "multiple icplb hit";
+ case 0x2e: return "illegal use of supervisor resource";
+ default: return "undef";
+ }
+}
+
void dump(struct pt_regs *fp)
{
char buf[150];
size_t i;
+ uint16_t hwerrcause, excause;
if (!ENABLE_DUMP)
return;
@@ -247,11 +282,14 @@
/* fp->ipend is garbage, so load it ourself */
fp->ipend = bfin_read_IPEND();
+ hwerrcause = (fp->seqstat & HWERRCAUSE) >> HWERRCAUSE_P;
+ excause = (fp->seqstat & EXCAUSE) >> EXCAUSE_P;
+
printf("SEQUENCER STATUS:\n");
printf(" SEQSTAT: %08lx IPEND: %04lx SYSCFG: %04lx\n",
fp->seqstat, fp->ipend, fp->syscfg);
- printf(" HWERRCAUSE: 0x%lx\n", (fp->seqstat & HWERRCAUSE) >> HWERRCAUSE_P);
- printf(" EXCAUSE : 0x%lx\n", (fp->seqstat & EXCAUSE) >> EXCAUSE_P);
+ printf(" HWERRCAUSE: 0x%lx: %s\n", hwerrcause, strhwerrcause(hwerrcause));
+ printf(" EXCAUSE : 0x%lx: %s\n", excause, strexcause(excause));
for (i = 6; i <= 15; ++i) {
if (fp->ipend & (1 << i)) {
decode_address(buf, bfin_read32(EVT0 + 4*i));