diff options
| author | davem <davem@cvs.openbsd.org> | 1995-10-23 11:07:14 +0000 |
|---|---|---|
| committer | davem <davem@cvs.openbsd.org> | 1995-10-23 11:07:14 +0000 |
| commit | 6f0f0dc94ccc98a5a887606b17a9b84b520a9a5f (patch) | |
| tree | e73e898c25b0ec32a54f3905a5f75a69f6091556 | |
| parent | 0ba699dfe97c4aebcd2caae04453736c53af6a23 (diff) | |
Make the bootup data/text fault trap table entries jump to memfault_bootup
which will watchdog the machine for post-mortem examination.
| -rw-r--r-- | sys/arch/sparc/sparc/locore.s | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/sys/arch/sparc/sparc/locore.s b/sys/arch/sparc/sparc/locore.s index af2bdfc65b2..a227ca8abe3 100644 --- a/sys/arch/sparc/sparc/locore.s +++ b/sys/arch/sparc/sparc/locore.s @@ -333,7 +333,7 @@ start: _trapbase: /* trap 0 is special since we cannot receive it */ b dostart; nop; nop; nop ! 00 = reset (fake) - VTRAP(T_TEXTFAULT, 0) ! 01 = instr. fetch fault (backpatch to memfault) + VTRAP(T_TEXTFAULT, memfault_bootup) ! 01 = instr. fetch fault (backpatch to memfault) TRAP(T_ILLINST) ! 02 = illegal instruction TRAP(T_PRIVINST) ! 03 = privileged instruction TRAP(T_FPDISABLED) ! 04 = fp instr, but EF bit off in psr @@ -341,7 +341,7 @@ _trapbase: WINDOW_UF ! 06 = window underflow TRAP(T_ALIGN) ! 07 = address alignment error VTRAP(T_FPE, fp_exception) ! 08 = fp exception - VTRAP(T_DATAFAULT, 0) ! 09 = data fetch fault (backpatch to memfault) + VTRAP(T_DATAFAULT, memfault_bootup) ! 09 = data fetch fault (backpatch to memfault) TRAP(T_TAGOF) ! 0a = tag overflow UTRAP(0x0b) UTRAP(0x0c) @@ -1287,6 +1287,14 @@ normal_mem_fault: b return_from_trap ! go return wr %l0, 0, %psr ! (but first disable traps again) +/* At bootup, we have to point the data/text fault trap table entry + * somewhere by default. Make the machine watchdog so that we can + * see what happened by looking at %tbr and %pc under the PROM. + */ +memfault_bootup: + call 0 + nop + /* NOTREACHED */ /* * fp_exception has to check to see if we are trying to save |