diff options
Diffstat (limited to 'arch/powerpc/kernel/head_32.h')
| -rw-r--r-- | arch/powerpc/kernel/head_32.h | 37 |
1 files changed, 15 insertions, 22 deletions
diff --git a/arch/powerpc/kernel/head_32.h b/arch/powerpc/kernel/head_32.h index 7c767765071d..541664d95702 100644 --- a/arch/powerpc/kernel/head_32.h +++ b/arch/powerpc/kernel/head_32.h @@ -40,38 +40,31 @@ .macro EXCEPTION_PROLOG_1 for_rtas=0 #ifdef CONFIG_VMAP_STACK - mr r11, r1 + mtspr SPRN_SPRG_SCRATCH2,r1 subi r1, r1, INT_FRAME_SIZE /* use r1 if kernel */ beq 1f mfspr r1,SPRN_SPRG_THREAD lwz r1,TASK_STACK-THREAD(r1) addi r1, r1, THREAD_SIZE - INT_FRAME_SIZE +1: + mtcrf 0x7f, r1 + bt 32 - THREAD_ALIGN_SHIFT, stack_overflow #else subi r11, r1, INT_FRAME_SIZE /* use r1 if kernel */ beq 1f mfspr r11,SPRN_SPRG_THREAD lwz r11,TASK_STACK-THREAD(r11) addi r11, r11, THREAD_SIZE - INT_FRAME_SIZE -#endif -1: - tophys_novmstack r11, r11 -#ifdef CONFIG_VMAP_STACK - mtcrf 0x7f, r1 - bt 32 - THREAD_ALIGN_SHIFT, stack_overflow +1: tophys(r11, r11) #endif .endm .macro EXCEPTION_PROLOG_2 handle_dar_dsisr=0 #ifdef CONFIG_VMAP_STACK - mtcr r10 - li r10, MSR_KERNEL & ~(MSR_IR | MSR_RI) /* can take DTLB miss */ - mtmsr r10 + li r11, MSR_KERNEL & ~(MSR_IR | MSR_RI) /* can take DTLB miss */ + mtmsr r11 isync -#else - stw r10,_CCR(r11) /* save registers */ -#endif - mfspr r10, SPRN_SPRG_SCRATCH0 -#ifdef CONFIG_VMAP_STACK + mfspr r11, SPRN_SPRG_SCRATCH2 stw r11,GPR1(r1) stw r11,0(r1) mr r11, r1 @@ -80,14 +73,12 @@ stw r1,0(r11) tovirt(r1, r11) /* set new kernel sp */ #endif + stw r10,_CCR(r11) /* save registers */ stw r12,GPR12(r11) stw r9,GPR9(r11) - stw r10,GPR10(r11) -#ifdef CONFIG_VMAP_STACK - mfcr r10 - stw r10, _CCR(r11) -#endif + mfspr r10,SPRN_SPRG_SCRATCH0 mfspr r12,SPRN_SPRG_SCRATCH1 + stw r10,GPR10(r11) stw r12,GPR11(r11) mflr r10 stw r10,_LINK(r11) @@ -101,7 +92,6 @@ stw r10, _DSISR(r11) .endif lwz r9, SRR1(r12) - andi. r10, r9, MSR_PR lwz r12, SRR0(r12) #else mfspr r12,SPRN_SRR0 @@ -222,7 +212,10 @@ #endif mtspr SPRN_SRR1,r10 mtspr SPRN_SRR0,r11 - RFI /* jump to handler, enable MMU */ + rfi /* jump to handler, enable MMU */ +#ifdef CONFIG_40x + b . /* Prevent prefetch past rfi */ +#endif 99: b ret_from_kernel_syscall .endm |