diff options
Diffstat (limited to 'arch/powerpc/mm/book3s32/hash_low.S')
| -rw-r--r-- | arch/powerpc/mm/book3s32/hash_low.S | 46 |
1 files changed, 29 insertions, 17 deletions
diff --git a/arch/powerpc/mm/book3s32/hash_low.S b/arch/powerpc/mm/book3s32/hash_low.S index 8bbbd9775c8a..c11b0a005196 100644 --- a/arch/powerpc/mm/book3s32/hash_low.S +++ b/arch/powerpc/mm/book3s32/hash_low.S @@ -25,6 +25,12 @@ #include <asm/feature-fixups.h> #include <asm/code-patching-asm.h> +#ifdef CONFIG_VMAP_STACK +#define ADDR_OFFSET 0 +#else +#define ADDR_OFFSET PAGE_OFFSET +#endif + #ifdef CONFIG_SMP .section .bss .align 2 @@ -47,8 +53,8 @@ mmu_hash_lock: .text _GLOBAL(hash_page) #ifdef CONFIG_SMP - lis r8, (mmu_hash_lock - PAGE_OFFSET)@h - ori r8, r8, (mmu_hash_lock - PAGE_OFFSET)@l + lis r8, (mmu_hash_lock - ADDR_OFFSET)@h + ori r8, r8, (mmu_hash_lock - ADDR_OFFSET)@l lis r0,0x0fff b 10f 11: lwz r6,0(r8) @@ -66,9 +72,12 @@ _GLOBAL(hash_page) cmplw 0,r4,r0 ori r3,r3,_PAGE_USER|_PAGE_PRESENT /* test low addresses as user */ mfspr r5, SPRN_SPRG_PGDIR /* phys page-table root */ +#ifdef CONFIG_VMAP_STACK + tovirt(r5, r5) +#endif blt+ 112f /* assume user more likely */ - lis r5, (swapper_pg_dir - PAGE_OFFSET)@ha /* if kernel address, use */ - addi r5 ,r5 ,(swapper_pg_dir - PAGE_OFFSET)@l /* kernel page table */ + lis r5, (swapper_pg_dir - ADDR_OFFSET)@ha /* if kernel address, use */ + addi r5 ,r5 ,(swapper_pg_dir - ADDR_OFFSET)@l /* kernel page table */ rlwimi r3,r9,32-12,29,29 /* MSR_PR -> _PAGE_USER */ 112: #ifndef CONFIG_PTE_64BIT @@ -80,6 +89,9 @@ _GLOBAL(hash_page) lwzx r8,r8,r5 /* Get L1 entry */ rlwinm. r8,r8,0,0,20 /* extract pt base address */ #endif +#ifdef CONFIG_VMAP_STACK + tovirt(r8, r8) +#endif #ifdef CONFIG_SMP beq- hash_page_out /* return if no mapping */ #else @@ -137,9 +149,9 @@ retry: #ifdef CONFIG_SMP eieio - lis r8, (mmu_hash_lock - PAGE_OFFSET)@ha + lis r8, (mmu_hash_lock - ADDR_OFFSET)@ha li r0,0 - stw r0, (mmu_hash_lock - PAGE_OFFSET)@l(r8) + stw r0, (mmu_hash_lock - ADDR_OFFSET)@l(r8) #endif /* Return from the exception */ @@ -152,9 +164,9 @@ retry: #ifdef CONFIG_SMP hash_page_out: eieio - lis r8, (mmu_hash_lock - PAGE_OFFSET)@ha + lis r8, (mmu_hash_lock - ADDR_OFFSET)@ha li r0,0 - stw r0, (mmu_hash_lock - PAGE_OFFSET)@l(r8) + stw r0, (mmu_hash_lock - ADDR_OFFSET)@l(r8) blr #endif /* CONFIG_SMP */ @@ -329,7 +341,7 @@ END_FTR_SECTION_IFCLR(CPU_FTR_NEED_COHERENT) patch_site 1f, patch__hash_page_A1 patch_site 2f, patch__hash_page_A2 /* Get the address of the primary PTE group in the hash table (r3) */ -0: lis r0, (Hash_base - PAGE_OFFSET)@h /* base address of hash table */ +0: lis r0, (Hash_base - ADDR_OFFSET)@h /* base address of hash table */ 1: rlwimi r0,r3,LG_PTEG_SIZE,HASH_LEFT,HASH_RIGHT /* VSID -> hash */ 2: rlwinm r3,r4,20+LG_PTEG_SIZE,HASH_LEFT,HASH_RIGHT /* PI -> hash */ xor r3,r3,r0 /* make primary hash */ @@ -343,10 +355,10 @@ END_FTR_SECTION_IFCLR(CPU_FTR_NEED_COHERENT) beq+ 10f /* no PTE: go look for an empty slot */ tlbie r4 - lis r4, (htab_hash_searches - PAGE_OFFSET)@ha - lwz r6, (htab_hash_searches - PAGE_OFFSET)@l(r4) + lis r4, (htab_hash_searches - ADDR_OFFSET)@ha + lwz r6, (htab_hash_searches - ADDR_OFFSET)@l(r4) addi r6,r6,1 /* count how many searches we do */ - stw r6, (htab_hash_searches - PAGE_OFFSET)@l(r4) + stw r6, (htab_hash_searches - ADDR_OFFSET)@l(r4) /* Search the primary PTEG for a PTE whose 1st (d)word matches r5 */ mtctr r0 @@ -378,10 +390,10 @@ END_FTR_SECTION_IFCLR(CPU_FTR_NEED_COHERENT) beq+ found_empty /* update counter of times that the primary PTEG is full */ - lis r4, (primary_pteg_full - PAGE_OFFSET)@ha - lwz r6, (primary_pteg_full - PAGE_OFFSET)@l(r4) + lis r4, (primary_pteg_full - ADDR_OFFSET)@ha + lwz r6, (primary_pteg_full - ADDR_OFFSET)@l(r4) addi r6,r6,1 - stw r6, (primary_pteg_full - PAGE_OFFSET)@l(r4) + stw r6, (primary_pteg_full - ADDR_OFFSET)@l(r4) patch_site 0f, patch__hash_page_C /* Search the secondary PTEG for an empty slot */ @@ -415,8 +427,8 @@ END_FTR_SECTION_IFCLR(CPU_FTR_NEED_COHERENT) * lockup here but that shouldn't happen */ -1: lis r4, (next_slot - PAGE_OFFSET)@ha /* get next evict slot */ - lwz r6, (next_slot - PAGE_OFFSET)@l(r4) +1: lis r4, (next_slot - ADDR_OFFSET)@ha /* get next evict slot */ + lwz r6, (next_slot - ADDR_OFFSET)@l(r4) addi r6,r6,HPTE_SIZE /* search for candidate */ andi. r6,r6,7*HPTE_SIZE stw r6,next_slot@l(r4) |