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| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2015-03-27 16:11:40 +1100 |
|---|---|---|
| committer | Stewart Smith <stewart@linux.vnet.ibm.com> | 2015-03-31 15:42:37 +1100 |
| commit | 989d8b68b63ba21a58fb96cd0b0a82505e669046 (patch) | |
| tree | 74388ed44bae1f00319108dba9aeed1927208242 /asm | |
| parent | e162dbe49d12603ed9663a16f3040fbe6fddb9e9 (diff) | |
| download | skiboot-989d8b68b63ba21a58fb96cd0b0a82505e669046.zip skiboot-989d8b68b63ba21a58fb96cd0b0a82505e669046.tar.gz skiboot-989d8b68b63ba21a58fb96cd0b0a82505e669046.tar.bz2 | |
exceptions: Catch exceptions at boot time
And print some informations about GPR state, backtrace, etc...
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
Diffstat (limited to 'asm')
| -rw-r--r-- | asm/asm-offsets.c | 2 | ||||
| -rw-r--r-- | asm/head.S | 91 |
2 files changed, 76 insertions, 17 deletions
diff --git a/asm/asm-offsets.c b/asm/asm-offsets.c index 74f3124..6278c5c 100644 --- a/asm/asm-offsets.c +++ b/asm/asm-offsets.c @@ -85,6 +85,8 @@ int main(void) OFFSET(STACK_CFAR, stack_frame, cfar); OFFSET(STACK_SRR0, stack_frame, srr0); OFFSET(STACK_SRR1, stack_frame, srr1); + OFFSET(STACK_HSRR0, stack_frame, hsrr0); + OFFSET(STACK_HSRR1, stack_frame, hsrr1); DEFINE(STACK_FRAMESIZE, sizeof(struct stack_frame)); return 0; @@ -28,13 +28,6 @@ #define PPC_INST_SLEEP .long 0x4c0003a4 #define PPC_INST_RVWINKLE .long 0x4c0003e4 -#define EXCEPTION(nr) \ - .= nr; \ - mtsprg0 %r3; \ - mfspr %r3,SPR_CFAR; \ - b . ; - - #define GET_STACK(stack_reg,pir_reg) \ sldi stack_reg,pir_reg,STACK_SHIFT; \ addis stack_reg,stack_reg,CPU_STACKS_OFFSET@ha; \ @@ -113,6 +106,14 @@ hir_trigger: li %r25,0 b boot_entry +#define EXCEPTION(nr) \ + .= nr ;\ + mtsprg0 %r3 ;\ + mfspr %r3,SPR_CFAR ;\ + mtsprg1 %r4 ;\ + li %r4,nr ;\ + b _exception + /* More exception stubs */ EXCEPTION(0x200) EXCEPTION(0x300) @@ -132,7 +133,6 @@ hir_trigger: EXCEPTION(0xe00) EXCEPTION(0xe20) EXCEPTION(0xe40) - EXCEPTION(0xe50) EXCEPTION(0xe60) EXCEPTION(0xf00) EXCEPTION(0xf20) @@ -144,15 +144,72 @@ hir_trigger: EXCEPTION(0x1400) EXCEPTION(0x1500) EXCEPTION(0x1600) - EXCEPTION(0x1700) - EXCEPTION(0x1800) - EXCEPTION(0x1900) - EXCEPTION(0x1a00) - EXCEPTION(0x1b00) - EXCEPTION(0x1c00) - EXCEPTION(0x1d00) - EXCEPTION(0x1e00) - EXCEPTION(0x1f00) + + .= 0x1e00 +_exception: + std %r4,16(%r1) + stdu %r1,-STACK_FRAMESIZE(%r1) + std %r3,STACK_CFAR(%r1) + std %r4,STACK_TYPE(%r1) + mfsprg0 %r3 + mfsprg1 %r4 + SAVE_GPR(0,%r1) + SAVE_GPR(1,%r1) + SAVE_GPR(2,%r1) + SAVE_GPR(3,%r1) + SAVE_GPR(4,%r1) + SAVE_GPR(5,%r1) + SAVE_GPR(6,%r1) + SAVE_GPR(7,%r1) + SAVE_GPR(8,%r1) + SAVE_GPR(9,%r1) + SAVE_GPR(10,%r1) + SAVE_GPR(11,%r1) + SAVE_GPR(12,%r1) + SAVE_GPR(13,%r1) + SAVE_GPR(14,%r1) + SAVE_GPR(15,%r1) + SAVE_GPR(16,%r1) + SAVE_GPR(17,%r1) + SAVE_GPR(18,%r1) + SAVE_GPR(19,%r1) + SAVE_GPR(20,%r1) + SAVE_GPR(21,%r1) + SAVE_GPR(22,%r1) + SAVE_GPR(23,%r1) + SAVE_GPR(24,%r1) + SAVE_GPR(25,%r1) + SAVE_GPR(26,%r1) + SAVE_GPR(27,%r1) + SAVE_GPR(28,%r1) + SAVE_GPR(29,%r1) + SAVE_GPR(30,%r1) + SAVE_GPR(31,%r1) + mfcr %r3 + mfxer %r4 + mfctr %r5 + mflr %r6 + stw %r3,STACK_CR(%r1) + stw %r4,STACK_XER(%r1) + stw %r5,STACK_CTR(%r1) + stw %r5,STACK_LR(%r1) + mfspr %r3,SPR_SRR0 + mfspr %r4,SPR_SRR1 + mfspr %r5,SPR_HSRR0 + mfspr %r6,SPR_HSRR1 + std %r3,STACK_SRR0(%r1) + std %r4,STACK_SRR1(%r1) + std %r5,STACK_HSRR0(%r1) + std %r6,STACK_HSRR1(%r1) + mr %r3,%r1 + LOAD_IMM64(%r4, SKIBOOT_BASE) + LOAD_IMM32(%r5, exception_entry_foo - __head) + add %r4,%r4,%r5 + mtctr %r4 + bctrl + b . +exception_entry_foo: + b exception_entry .= 0x2000 /* This is the OPAL branch table. It's populated at boot time |