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Diffstat (limited to 'cpu/blackfin/traps.c')
-rw-r--r--cpu/blackfin/traps.c54
1 files changed, 46 insertions, 8 deletions
diff --git a/cpu/blackfin/traps.c b/cpu/blackfin/traps.c
index 2eb45b5..d17c0a1 100644
--- a/cpu/blackfin/traps.c
+++ b/cpu/blackfin/traps.c
@@ -236,19 +236,60 @@ static void decode_address(char *buf, unsigned long address)
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;
+ /* 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));
@@ -263,8 +304,9 @@ void dump(struct pt_regs *fp)
printf(" RETX: %s\n", buf);
decode_address(buf, fp->rets);
printf(" RETS: %s\n", buf);
+ /* we lie and store RETI in "pc" */
decode_address(buf, fp->pc);
- printf(" PC : %s\n", buf);
+ printf(" RETI: %s\n", buf);
if (fp->seqstat & EXCAUSE) {
decode_address(buf, bfin_read_DCPLB_FAULT_ADDR());
@@ -344,10 +386,6 @@ void bfin_panic(struct pt_regs *regs)
);
dump(regs);
dump_bfin_trace_buffer();
- printf(
- "\n"
- "Please reset the board\n"
- "\n"
- );
+ puts("\n");
bfin_reset_or_hang();
}