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| author | LEROY Christophe <christophe.leroy@c-s.fr> | 2015-04-20 07:54:40 +0200 |
|---|---|---|
| committer | Scott Wood <scottwood@freescale.com> | 2015-06-02 21:37:25 -0500 |
| commit | d5fd9d7d669e81e024737a198d12ff8af4fd89cf (patch) | |
| tree | d206643d2a4a4bc768d8b833756ecd0506ea5075 /arch/powerpc/kernel/head_8xx.S | |
| parent | 90883a8255148e98026591e52a3495db18b29905 (diff) | |
| download | linux-d5fd9d7d669e81e024737a198d12ff8af4fd89cf.tar.gz linux-d5fd9d7d669e81e024737a198d12ff8af4fd89cf.tar.xz | |
powerpc/8xx: Handle CR out of exception PROLOG/EPILOG
In order to be able to reduce scope during which CR is saved, we take
CR saving/restoring out of exception PROLOG and EPILOG
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Scott Wood <scottwood@freescale.com>
Diffstat (limited to 'arch/powerpc/kernel/head_8xx.S')
| -rw-r--r-- | arch/powerpc/kernel/head_8xx.S | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/arch/powerpc/kernel/head_8xx.S b/arch/powerpc/kernel/head_8xx.S index 1279018b3749..5a69c5e82363 100644 --- a/arch/powerpc/kernel/head_8xx.S +++ b/arch/powerpc/kernel/head_8xx.S @@ -116,13 +116,13 @@ turn_on_mmu: */ #define EXCEPTION_PROLOG \ EXCEPTION_PROLOG_0; \ + mfcr r10; \ EXCEPTION_PROLOG_1; \ EXCEPTION_PROLOG_2 #define EXCEPTION_PROLOG_0 \ mtspr SPRN_SPRG_SCRATCH0,r10; \ - mtspr SPRN_SPRG_SCRATCH1,r11; \ - mfcr r10 + mtspr SPRN_SPRG_SCRATCH1,r11 #define EXCEPTION_PROLOG_1 \ mfspr r11,SPRN_SRR1; /* check whether user or kernel */ \ @@ -162,7 +162,6 @@ turn_on_mmu: * Exception exit code. */ #define EXCEPTION_EPILOG_0 \ - mtcr r10; \ mfspr r10,SPRN_SPRG_SCRATCH0; \ mfspr r11,SPRN_SPRG_SCRATCH1 @@ -313,6 +312,7 @@ InstructionTLBMiss: mtspr SPRN_DAR, r3 #endif EXCEPTION_PROLOG_0 + mfcr r10 mtspr SPRN_SPRG_SCRATCH2, r10 mfspr r10, SPRN_SRR0 /* Get effective address of fault */ INVALIDATE_ADJACENT_PAGES_CPU15(r11, r10) @@ -363,6 +363,7 @@ InstructionTLBMiss: mtspr SPRN_DAR, r11 /* Tag DAR */ #endif mfspr r10, SPRN_SPRG_SCRATCH2 + mtcr r10 EXCEPTION_EPILOG_0 rfi @@ -372,6 +373,7 @@ DataStoreTLBMiss: mtspr SPRN_DAR, r3 #endif EXCEPTION_PROLOG_0 + mfcr r10 mtspr SPRN_SPRG_SCRATCH2, r10 mfspr r10, SPRN_MD_EPN @@ -437,6 +439,7 @@ DataStoreTLBMiss: #endif mtspr SPRN_DAR, r11 /* Tag DAR */ mfspr r10, SPRN_SPRG_SCRATCH2 + mtcr r10 EXCEPTION_EPILOG_0 rfi @@ -462,6 +465,7 @@ InstructionTLBError: . = 0x1400 DataTLBError: EXCEPTION_PROLOG_0 + mfcr r10 mfspr r11, SPRN_DAR cmpwi cr0, r11, RPN_PATTERN |