diff options
| author | Kumar Gala <galak@kernel.crashing.org> | 2009-09-01 15:48:42 +0000 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2009-09-02 16:20:41 +1000 |
| commit | 76acc2c1a7a9a8c2cae7e9cf8d0a8b374a48aa94 (patch) | |
| tree | 3d65ea23c18d4a73ce55724de66ae9eb7eb2358d /arch/powerpc/kernel | |
| parent | 1d5d9527d8ed8d87beb22a4fd954366aeabd12c7 (diff) | |
powerpc/fsl-booke: Use HW PTE format if CONFIG_PTE_64BIT
Switch to using the Power ISA defined PTE format when we have a 64-bit
PTE. This makes the code handling between fsl-booke and book3e-64
similiar for TLB faults.
Additionally this lets use take advantage of the page size encodings and
full permissions that the HW PTE defines.
Also defined _PMD_PRESENT, _PMD_PRESENT_MASK, and _PMD_BAD since the
32-bit ppc arch code expects them.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/kernel')
| -rw-r--r-- | arch/powerpc/kernel/head_fsl_booke.S | 36 |
1 files changed, 25 insertions, 11 deletions
diff --git a/arch/powerpc/kernel/head_fsl_booke.S b/arch/powerpc/kernel/head_fsl_booke.S index 2c5af525647..975788ca05d 100644 --- a/arch/powerpc/kernel/head_fsl_booke.S +++ b/arch/powerpc/kernel/head_fsl_booke.S @@ -575,7 +575,12 @@ interrupt_base: * place or can we save a couple of instructions here ? */ mfspr r12,SPRN_ESR +#ifdef CONFIG_PTE_64BIT + li r13,_PAGE_PRESENT + oris r13,r13,_PAGE_ACCESSED@h +#else li r13,_PAGE_PRESENT|_PAGE_ACCESSED +#endif rlwimi r13,r12,11,29,29 FIND_PTE @@ -643,7 +648,12 @@ interrupt_base: 4: /* Make up the required permissions */ +#ifdef CONFIG_PTE_64BIT + li r13,_PAGE_PRESENT | _PAGE_EXEC + oris r13,r13,_PAGE_ACCESSED@h +#else li r13,_PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_EXEC +#endif FIND_PTE andc. r13,r13,r11 /* Check permission */ @@ -733,7 +743,7 @@ finish_tlb_load: mfspr r12, SPRN_MAS2 #ifdef CONFIG_PTE_64BIT - rlwimi r12, r11, 26, 24, 31 /* extract ...WIMGE from pte */ + rlwimi r12, r11, 32-19, 27, 31 /* extract WIMGE from pte */ #else rlwimi r12, r11, 26, 27, 31 /* extract WIMGE from pte */ #endif @@ -742,6 +752,20 @@ finish_tlb_load: #endif mtspr SPRN_MAS2, r12 +#ifdef CONFIG_PTE_64BIT + rlwinm r12, r11, 32-2, 26, 31 /* Move in perm bits */ + andi. r10, r11, _PAGE_DIRTY + bne 1f + li r10, MAS3_SW | MAS3_UW + andc r12, r12, r10 +1: rlwimi r12, r13, 20, 0, 11 /* grab RPN[32:43] */ + rlwimi r12, r11, 20, 12, 19 /* grab RPN[44:51] */ + mtspr SPRN_MAS3, r12 +BEGIN_MMU_FTR_SECTION + srwi r10, r13, 12 /* grab RPN[12:31] */ + mtspr SPRN_MAS7, r10 +END_MMU_FTR_SECTION_IFSET(MMU_FTR_BIG_PHYS) +#else li r10, (_PAGE_EXEC | _PAGE_PRESENT) rlwimi r10, r11, 31, 29, 29 /* extract _PAGE_DIRTY into SW */ and r12, r11, r10 @@ -749,16 +773,6 @@ finish_tlb_load: slwi r10, r12, 1 or r10, r10, r12 iseleq r12, r12, r10 - -#ifdef CONFIG_PTE_64BIT - rlwimi r12, r13, 24, 0, 7 /* grab RPN[32:39] */ - rlwimi r12, r11, 24, 8, 19 /* grab RPN[40:51] */ - mtspr SPRN_MAS3, r12 -BEGIN_MMU_FTR_SECTION - srwi r10, r13, 8 /* grab RPN[8:31] */ - mtspr SPRN_MAS7, r10 -END_MMU_FTR_SECTION_IFSET(MMU_FTR_BIG_PHYS) -#else rlwimi r11, r12, 0, 20, 31 /* Extract RPN from PTE and merge with perms */ mtspr SPRN_MAS3, r11 #endif |