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| author | Nicholas Piggin <npiggin@gmail.com> | 2016-12-19 21:30:03 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2017-04-28 14:02:25 +0300 |
| commit | a4087a4d38981bef3de7dd814493df202919cd2e (patch) | |
| tree | b5e8a1e65a1bce277f6d27f3233a224360da94a3 /arch/powerpc/include | |
| parent | 83a980f7f4769c0673f0f966350d1db26993a193 (diff) | |
| download | linux-a4087a4d38981bef3de7dd814493df202919cd2e.tar.xz | |
powerpc/64s: Exception macro for stack frame and initial register save
This code is common to a few exceptions, and another user will be added.
This causes a trivial change to generated code:
- 604: std r9,416(r1)
- 608: mfspr r11,314
- 60c: std r11,368(r1)
- 610: mfspr r12,315
+ 604: mfspr r11,314
+ 608: mfspr r12,315
+ 60c: std r9,416(r1)
+ 610: std r11,368(r1)
machine_check_powernv_early could also use this, but that requires non
trivial changes to generated code, so that's for another patch.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/include')
| -rw-r--r-- | arch/powerpc/include/asm/exception-64s.h | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/arch/powerpc/include/asm/exception-64s.h b/arch/powerpc/include/asm/exception-64s.h index 99ed1d811684..229f22a2e9b1 100644 --- a/arch/powerpc/include/asm/exception-64s.h +++ b/arch/powerpc/include/asm/exception-64s.h @@ -323,6 +323,15 @@ END_FTR_SECTION_NESTED(ftr,ftr,943) #define NOTEST(n) +#define EXCEPTION_PROLOG_COMMON_1() \ + std r9,_CCR(r1); /* save CR in stackframe */ \ + std r11,_NIP(r1); /* save SRR0 in stackframe */ \ + std r12,_MSR(r1); /* save SRR1 in stackframe */ \ + std r10,0(r1); /* make stack chain pointer */ \ + std r0,GPR0(r1); /* save r0 in stackframe */ \ + std r10,GPR1(r1); /* save r1 in stackframe */ \ + + /* * The common exception prolog is used for all except a few exceptions * such as a segment miss on a kernel address. We have to be prepared @@ -347,12 +356,7 @@ END_FTR_SECTION_NESTED(ftr,ftr,943) addi r3,r13,area; /* r3 -> where regs are saved*/ \ RESTORE_CTR(r1, area); \ b bad_stack; \ -3: std r9,_CCR(r1); /* save CR in stackframe */ \ - std r11,_NIP(r1); /* save SRR0 in stackframe */ \ - std r12,_MSR(r1); /* save SRR1 in stackframe */ \ - std r10,0(r1); /* make stack chain pointer */ \ - std r0,GPR0(r1); /* save r0 in stackframe */ \ - std r10,GPR1(r1); /* save r1 in stackframe */ \ +3: EXCEPTION_PROLOG_COMMON_1(); \ beq 4f; /* if from kernel mode */ \ ACCOUNT_CPU_USER_ENTRY(r13, r9, r10); \ SAVE_PPR(area, r9, r10); \ |