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| author | Christophe Leroy <christophe.leroy@c-s.fr> | 2016-09-16 08:42:04 +0200 |
|---|---|---|
| committer | Scott Wood <oss@buserror.net> | 2016-09-25 02:38:56 -0500 |
| commit | d1b9f81456d27dd44c0e7193a8a24ec0bfeda98b (patch) | |
| tree | 85113d5db6a7d5e4391f6d1bdf28adf09061bd9e /arch/powerpc | |
| parent | 5dc6f3fedee58efa343e822558fc3e2f0eb2ad1f (diff) | |
| download | linux-d1b9f81456d27dd44c0e7193a8a24ec0bfeda98b.tar.gz linux-d1b9f81456d27dd44c0e7193a8a24ec0bfeda98b.tar.xz | |
powerpc/8xx: use r3 to scratch CR in ITLBmiss
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Scott Wood <oss@buserror.net>
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/kernel/head_8xx.S | 21 |
1 files changed, 9 insertions, 12 deletions
diff --git a/arch/powerpc/kernel/head_8xx.S b/arch/powerpc/kernel/head_8xx.S index f559f217cd87..451e78929f16 100644 --- a/arch/powerpc/kernel/head_8xx.S +++ b/arch/powerpc/kernel/head_8xx.S @@ -321,7 +321,7 @@ SystemCall: #endif InstructionTLBMiss: -#ifdef CONFIG_8xx_CPU6 +#if defined(CONFIG_8xx_CPU6) || defined(CONFIG_MODULES) || defined (CONFIG_DEBUG_PAGEALLOC) mtspr SPRN_SPRG_SCRATCH2, r3 #endif EXCEPTION_PROLOG_0 @@ -329,23 +329,20 @@ InstructionTLBMiss: /* If we are faulting a kernel address, we have to use the * kernel page tables. */ + mfspr r10, SPRN_SRR0 /* Get effective address of fault */ + INVALIDATE_ADJACENT_PAGES_CPU15(r11, r10) #if defined(CONFIG_MODULES) || defined (CONFIG_DEBUG_PAGEALLOC) /* Only modules will cause ITLB Misses as we always * pin the first 8MB of kernel memory */ - mfspr r11, SPRN_SRR0 /* Get effective address of fault */ - INVALIDATE_ADJACENT_PAGES_CPU15(r10, r11) - mfcr r10 - IS_KERNEL(r11, r11) + mfcr r3 + IS_KERNEL(r11, r10) +#endif mfspr r11, SPRN_M_TW /* Get level 1 table */ +#if defined(CONFIG_MODULES) || defined (CONFIG_DEBUG_PAGEALLOC) BRANCH_UNLESS_KERNEL(3f) lis r11, (swapper_pg_dir-PAGE_OFFSET)@ha 3: - mtcr r10 - mfspr r10, SPRN_SRR0 /* Get effective address of fault */ -#else - mfspr r10, SPRN_SRR0 /* Get effective address of fault */ - INVALIDATE_ADJACENT_PAGES_CPU15(r11, r10) - mfspr r11, SPRN_M_TW /* Get level 1 table base address */ + mtcr r3 #endif /* Insert level 1 index */ rlwimi r11, r10, 32 - ((PAGE_SHIFT - 2) << 1), (PAGE_SHIFT - 2) << 1, 29 @@ -377,7 +374,7 @@ InstructionTLBMiss: MTSPR_CPU6(SPRN_MI_RPN, r10, r3) /* Update TLB entry */ /* Restore registers */ -#ifdef CONFIG_8xx_CPU6 +#if defined(CONFIG_8xx_CPU6) || defined(CONFIG_MODULES) || defined (CONFIG_DEBUG_PAGEALLOC) mfspr r3, SPRN_SPRG_SCRATCH2 #endif EXCEPTION_EPILOG_0 |