diff options
Diffstat (limited to 'arch/powerpc/kernel/head_8xx.S')
| -rw-r--r-- | arch/powerpc/kernel/head_8xx.S | 41 |
1 files changed, 8 insertions, 33 deletions
diff --git a/arch/powerpc/kernel/head_8xx.S b/arch/powerpc/kernel/head_8xx.S index 73715cd0de45..32cc9e55b772 100644 --- a/arch/powerpc/kernel/head_8xx.S +++ b/arch/powerpc/kernel/head_8xx.S @@ -329,12 +329,9 @@ InstructionTLBMiss: /* Extract level 1 index */ rlwinm r10, r10, 32 - ((PAGE_SHIFT - 2) << 1), (PAGE_SHIFT - 2) << 1, 29 lwzx r11, r10, r11 /* Get the level 1 entry */ - rlwinm. r10, r11,0,0,19 /* Extract page descriptor page address */ - beq 2f /* If zero, don't try to find a pte */ + rlwinm r10, r11,0,0,19 /* Extract page descriptor page address */ - /* We have a pte table, so load the MI_TWC with the attributes - * for this "segment." - */ + /* Load the MI_TWC with the attributes for this "segment." */ MTSPR_CPU6(SPRN_MI_TWC, r11, r3) /* Set segment attributes */ mfspr r11, SPRN_SRR0 /* Get effective address of fault */ /* Extract level 2 index */ @@ -342,13 +339,11 @@ InstructionTLBMiss: lwzx r10, r10, r11 /* Get the pte */ #ifdef CONFIG_SWAP - andi. r11, r10, _PAGE_ACCESSED | _PAGE_PRESENT - cmpwi cr0, r11, _PAGE_ACCESSED | _PAGE_PRESENT - li r11, RPN_PATTERN - bne- cr0, 2f -#else - li r11, RPN_PATTERN + rlwinm r11, r10, 32-5, _PAGE_PRESENT + and r11, r11, r10 + rlwimi r10, r11, 0, _PAGE_PRESENT #endif + li r11, RPN_PATTERN /* The Linux PTE won't go exactly into the MMU TLB. * Software indicator bits 21 and 28 must be clear. * Software indicator bits 24, 25, 26, and 27 must be @@ -366,21 +361,6 @@ InstructionTLBMiss: mfspr r10, SPRN_SPRG_SCRATCH2 EXCEPTION_EPILOG_0 rfi -2: - mfspr r10, SPRN_SRR1 - /* clear all error bits as TLB Miss - * sets a few unconditionally - */ - rlwinm r10, r10, 0, 0xffff - mtspr SPRN_SRR1, r10 - - /* Restore registers */ -#ifdef CONFIG_8xx_CPU6 - mfspr r3, SPRN_DAR - mtspr SPRN_DAR, r11 /* Tag DAR */ -#endif - mfspr r10, SPRN_SPRG_SCRATCH2 - b InstructionTLBError1 . = 0x1200 DataStoreTLBMiss: @@ -403,8 +383,6 @@ DataStoreTLBMiss: /* Extract level 1 index */ rlwinm r10, r10, 32 - ((PAGE_SHIFT - 2) << 1), (PAGE_SHIFT - 2) << 1, 29 lwzx r11, r10, r11 /* Get the level 1 entry */ - rlwinm. r10, r11,0,0,19 /* Extract page descriptor page address */ - beq 2f /* If zero, don't try to find a pte */ /* We have a pte table, so load fetch the pte from the table. */ @@ -447,7 +425,7 @@ DataStoreTLBMiss: * set. All other Linux PTE bits control the behavior * of the MMU. */ -2: li r11, RPN_PATTERN + li r11, RPN_PATTERN rlwimi r10, r11, 0, 24, 28 /* Set 24-27, clear 28 */ MTSPR_CPU6(SPRN_MD_RPN, r10, r3) /* Update TLB entry */ @@ -466,10 +444,7 @@ DataStoreTLBMiss: */ . = 0x1300 InstructionTLBError: - EXCEPTION_PROLOG_0 -InstructionTLBError1: - EXCEPTION_PROLOG_1 - EXCEPTION_PROLOG_2 + EXCEPTION_PROLOG mr r4,r12 mr r5,r9 andis. r10,r5,0x4000 |