From 8a13c4f972e6c107d8cff54de647544c00e25b41 Mon Sep 17 00:00:00 2001 From: Kumar Gala <galak@kernel.crashing.org> Date: Thu, 11 Oct 2007 13:36:52 -0500 Subject: [POWERPC] Use PAGE_OFFSET to tell if an address is user/kernel in SW TLB handlers Move to using PAGE_OFFSET instead of TASK_SIZE or KERNELBASE value on 6xx/40x/44x/fsl-booke to determine if the faulting address is a kernel or user space address. This mimics how the macro is_kernel_addr() works. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> --- arch/powerpc/kernel/head_32.S | 18 +++++++++--------- arch/powerpc/kernel/head_40x.S | 6 +++--- arch/powerpc/kernel/head_44x.S | 6 +++--- arch/powerpc/kernel/head_fsl_booke.S | 11 ++++------- 4 files changed, 19 insertions(+), 22 deletions(-) (limited to 'arch') diff --git a/arch/powerpc/kernel/head_32.S b/arch/powerpc/kernel/head_32.S index d83f04e5a599..a5b13ae7fd20 100644 --- a/arch/powerpc/kernel/head_32.S +++ b/arch/powerpc/kernel/head_32.S @@ -469,12 +469,12 @@ InstructionTLBMiss: mfctr r0 /* Get PTE (linux-style) and check access */ mfspr r3,SPRN_IMISS - lis r1,KERNELBASE@h /* check if kernel address */ - cmplw 0,r3,r1 + lis r1,PAGE_OFFSET@h /* check if kernel address */ + cmplw 0,r1,r3 mfspr r2,SPRN_SPRG3 li r1,_PAGE_USER|_PAGE_PRESENT /* low addresses tested as user */ lwz r2,PGDIR(r2) - blt+ 112f + bge- 112f mfspr r2,SPRN_SRR1 /* and MSR_PR bit from SRR1 */ rlwimi r1,r2,32-12,29,29 /* shift MSR_PR to _PAGE_USER posn */ lis r2,swapper_pg_dir@ha /* if kernel address, use */ @@ -543,12 +543,12 @@ DataLoadTLBMiss: mfctr r0 /* Get PTE (linux-style) and check access */ mfspr r3,SPRN_DMISS - lis r1,KERNELBASE@h /* check if kernel address */ - cmplw 0,r3,r1 + lis r1,PAGE_OFFSET@h /* check if kernel address */ + cmplw 0,r1,r3 mfspr r2,SPRN_SPRG3 li r1,_PAGE_USER|_PAGE_PRESENT /* low addresses tested as user */ lwz r2,PGDIR(r2) - blt+ 112f + bge- 112f mfspr r2,SPRN_SRR1 /* and MSR_PR bit from SRR1 */ rlwimi r1,r2,32-12,29,29 /* shift MSR_PR to _PAGE_USER posn */ lis r2,swapper_pg_dir@ha /* if kernel address, use */ @@ -615,12 +615,12 @@ DataStoreTLBMiss: mfctr r0 /* Get PTE (linux-style) and check access */ mfspr r3,SPRN_DMISS - lis r1,KERNELBASE@h /* check if kernel address */ - cmplw 0,r3,r1 + lis r1,PAGE_OFFSET@h /* check if kernel address */ + cmplw 0,r1,r3 mfspr r2,SPRN_SPRG3 li r1,_PAGE_RW|_PAGE_USER|_PAGE_PRESENT /* access flags */ lwz r2,PGDIR(r2) - blt+ 112f + bge- 112f mfspr r2,SPRN_SRR1 /* and MSR_PR bit from SRR1 */ rlwimi r1,r2,32-12,29,29 /* shift MSR_PR to _PAGE_USER posn */ lis r2,swapper_pg_dir@ha /* if kernel address, use */ diff --git a/arch/powerpc/kernel/head_40x.S b/arch/powerpc/kernel/head_40x.S index e312824bdd98..cfefc2df8f2a 100644 --- a/arch/powerpc/kernel/head_40x.S +++ b/arch/powerpc/kernel/head_40x.S @@ -289,7 +289,7 @@ label: /* If we are faulting a kernel address, we have to use the * kernel page tables. */ - lis r11, TASK_SIZE@h + lis r11, PAGE_OFFSET@h cmplw r10, r11 blt+ 3f lis r11, swapper_pg_dir@h @@ -481,7 +481,7 @@ label: /* If we are faulting a kernel address, we have to use the * kernel page tables. */ - lis r11, TASK_SIZE@h + lis r11, PAGE_OFFSET@h cmplw r10, r11 blt+ 3f lis r11, swapper_pg_dir@h @@ -581,7 +581,7 @@ label: /* If we are faulting a kernel address, we have to use the * kernel page tables. */ - lis r11, TASK_SIZE@h + lis r11, PAGE_OFFSET@h cmplw r10, r11 blt+ 3f lis r11, swapper_pg_dir@h diff --git a/arch/powerpc/kernel/head_44x.S b/arch/powerpc/kernel/head_44x.S index 864d63fbb204..409db6123924 100644 --- a/arch/powerpc/kernel/head_44x.S +++ b/arch/powerpc/kernel/head_44x.S @@ -319,7 +319,7 @@ interrupt_base: /* If we are faulting a kernel address, we have to use the * kernel page tables. */ - lis r11, TASK_SIZE@h + lis r11, PAGE_OFFSET@h cmplw r10, r11 blt+ 3f lis r11, swapper_pg_dir@h @@ -458,7 +458,7 @@ interrupt_base: /* If we are faulting a kernel address, we have to use the * kernel page tables. */ - lis r11, TASK_SIZE@h + lis r11, PAGE_OFFSET@h cmplw r10, r11 blt+ 3f lis r11, swapper_pg_dir@h @@ -528,7 +528,7 @@ interrupt_base: /* If we are faulting a kernel address, we have to use the * kernel page tables. */ - lis r11, TASK_SIZE@h + lis r11, PAGE_OFFSET@h cmplw r10, r11 blt+ 3f lis r11, swapper_pg_dir@h diff --git a/arch/powerpc/kernel/head_fsl_booke.S b/arch/powerpc/kernel/head_fsl_booke.S index ee33ddd97ef3..4b9822728aea 100644 --- a/arch/powerpc/kernel/head_fsl_booke.S +++ b/arch/powerpc/kernel/head_fsl_booke.S @@ -461,8 +461,7 @@ interrupt_base: /* If we are faulting a kernel address, we have to use the * kernel page tables. */ - lis r11, TASK_SIZE@h - ori r11, r11, TASK_SIZE@l + lis r11, PAGE_OFFSET@h cmplw 0, r10, r11 bge 2f @@ -584,8 +583,7 @@ interrupt_base: /* If we are faulting a kernel address, we have to use the * kernel page tables. */ - lis r11, TASK_SIZE@h - ori r11, r11, TASK_SIZE@l + lis r11, PAGE_OFFSET@h cmplw 5, r10, r11 blt 5, 3f lis r11, swapper_pg_dir@h @@ -645,8 +643,7 @@ interrupt_base: /* If we are faulting a kernel address, we have to use the * kernel page tables. */ - lis r11, TASK_SIZE@h - ori r11, r11, TASK_SIZE@l + lis r11, PAGE_OFFSET@h cmplw 5, r10, r11 blt 5, 3f lis r11, swapper_pg_dir@h @@ -744,7 +741,7 @@ data_access: * r10 - EA of fault * r11 - TLB (info from Linux PTE) * r12, r13 - available to use - * CR5 - results of addr < TASK_SIZE + * CR5 - results of addr >= PAGE_OFFSET * MAS0, MAS1 - loaded with proper value when we get here * MAS2, MAS3 - will need additional info from Linux PTE * Upon exit, we reload everything and RFI. -- cgit v1.2.3