diff options
Diffstat (limited to 'arch/ppc/kernel/entry.S')
| -rw-r--r-- | arch/ppc/kernel/entry.S | 164 |
1 files changed, 63 insertions, 101 deletions
diff --git a/arch/ppc/kernel/entry.S b/arch/ppc/kernel/entry.S index 661523707e8c..8377b6ca26da 100644 --- a/arch/ppc/kernel/entry.S +++ b/arch/ppc/kernel/entry.S @@ -46,26 +46,23 @@ #ifdef CONFIG_BOOKE #include "head_booke.h" +#define TRANSFER_TO_HANDLER_EXC_LEVEL(exc_level) \ + mtspr exc_level##_SPRG,r8; \ + BOOKE_LOAD_EXC_LEVEL_STACK(exc_level); \ + lwz r0,GPR10-INT_FRAME_SIZE(r8); \ + stw r0,GPR10(r11); \ + lwz r0,GPR11-INT_FRAME_SIZE(r8); \ + stw r0,GPR11(r11); \ + mfspr r8,exc_level##_SPRG + .globl mcheck_transfer_to_handler mcheck_transfer_to_handler: - mtspr MCHECK_SPRG,r8 - BOOKE_LOAD_MCHECK_STACK - lwz r0,GPR10-INT_FRAME_SIZE(r8) - stw r0,GPR10(r11) - lwz r0,GPR11-INT_FRAME_SIZE(r8) - stw r0,GPR11(r11) - mfspr r8,MCHECK_SPRG + TRANSFER_TO_HANDLER_EXC_LEVEL(MCHECK) b transfer_to_handler_full .globl crit_transfer_to_handler crit_transfer_to_handler: - mtspr CRIT_SPRG,r8 - BOOKE_LOAD_CRIT_STACK - lwz r0,GPR10-INT_FRAME_SIZE(r8) - stw r0,GPR10(r11) - lwz r0,GPR11-INT_FRAME_SIZE(r8) - stw r0,GPR11(r11) - mfspr r8,CRIT_SPRG + TRANSFER_TO_HANDLER_EXC_LEVEL(CRIT) /* fall through */ #endif @@ -783,99 +780,64 @@ exc_exit_restart_end: * time of the critical interrupt. * */ - .globl ret_from_crit_exc -ret_from_crit_exc: - REST_NVGPRS(r1) - lwz r3,_MSR(r1) - andi. r3,r3,MSR_PR - LOAD_MSR_KERNEL(r10,MSR_KERNEL) - bne user_exc_return - - lwz r0,GPR0(r1) - lwz r2,GPR2(r1) - REST_4GPRS(3, r1) - REST_2GPRS(7, r1) - - lwz r10,_XER(r1) - lwz r11,_CTR(r1) - mtspr SPRN_XER,r10 - mtctr r11 - - PPC405_ERR77(0,r1) - stwcx. r0,0,r1 /* to clear the reservation */ - - lwz r11,_LINK(r1) - mtlr r11 - lwz r10,_CCR(r1) - mtcrf 0xff,r10 #ifdef CONFIG_40x - /* avoid any possible TLB misses here by turning off MSR.DR, we - * assume the instructions here are mapped by a pinned TLB entry */ - li r10,MSR_IR - mtmsr r10 - isync - tophys(r1, r1) +#define PPC_40x_TURN_OFF_MSR_DR \ + /* avoid any possible TLB misses here by turning off MSR.DR, we \ + * assume the instructions here are mapped by a pinned TLB entry */ \ + li r10,MSR_IR; \ + mtmsr r10; \ + isync; \ + tophys(r1, r1); +#else +#define PPC_40x_TURN_OFF_MSR_DR #endif - lwz r9,_DEAR(r1) - lwz r10,_ESR(r1) - mtspr SPRN_DEAR,r9 - mtspr SPRN_ESR,r10 - lwz r11,_NIP(r1) - lwz r12,_MSR(r1) - mtspr SPRN_CSRR0,r11 - mtspr SPRN_CSRR1,r12 - lwz r9,GPR9(r1) - lwz r12,GPR12(r1) - lwz r10,GPR10(r1) - lwz r11,GPR11(r1) - lwz r1,GPR1(r1) - PPC405_ERR77_SYNC - rfci - b . /* prevent prefetch past rfci */ + +#define RET_FROM_EXC_LEVEL(exc_lvl_srr0, exc_lvl_srr1, exc_lvl_rfi) \ + REST_NVGPRS(r1); \ + lwz r3,_MSR(r1); \ + andi. r3,r3,MSR_PR; \ + LOAD_MSR_KERNEL(r10,MSR_KERNEL); \ + bne user_exc_return; \ + lwz r0,GPR0(r1); \ + lwz r2,GPR2(r1); \ + REST_4GPRS(3, r1); \ + REST_2GPRS(7, r1); \ + lwz r10,_XER(r1); \ + lwz r11,_CTR(r1); \ + mtspr SPRN_XER,r10; \ + mtctr r11; \ + PPC405_ERR77(0,r1); \ + stwcx. r0,0,r1; /* to clear the reservation */ \ + lwz r11,_LINK(r1); \ + mtlr r11; \ + lwz r10,_CCR(r1); \ + mtcrf 0xff,r10; \ + PPC_40x_TURN_OFF_MSR_DR; \ + lwz r9,_DEAR(r1); \ + lwz r10,_ESR(r1); \ + mtspr SPRN_DEAR,r9; \ + mtspr SPRN_ESR,r10; \ + lwz r11,_NIP(r1); \ + lwz r12,_MSR(r1); \ + mtspr exc_lvl_srr0,r11; \ + mtspr exc_lvl_srr1,r12; \ + lwz r9,GPR9(r1); \ + lwz r12,GPR12(r1); \ + lwz r10,GPR10(r1); \ + lwz r11,GPR11(r1); \ + lwz r1,GPR1(r1); \ + PPC405_ERR77_SYNC; \ + exc_lvl_rfi; \ + b .; /* prevent prefetch past exc_lvl_rfi */ + + .globl ret_from_crit_exc +ret_from_crit_exc: + RET_FROM_EXC_LEVEL(SPRN_CSRR0, SPRN_CSRR1, RFCI) #ifdef CONFIG_BOOKE -/* - * Return from a machine check interrupt, similar to a critical - * interrupt. - */ .globl ret_from_mcheck_exc ret_from_mcheck_exc: - REST_NVGPRS(r1) - lwz r3,_MSR(r1) - andi. r3,r3,MSR_PR - LOAD_MSR_KERNEL(r10,MSR_KERNEL) - bne user_exc_return - - lwz r0,GPR0(r1) - lwz r2,GPR2(r1) - REST_4GPRS(3, r1) - REST_2GPRS(7, r1) - - lwz r10,_XER(r1) - lwz r11,_CTR(r1) - mtspr SPRN_XER,r10 - mtctr r11 - - stwcx. r0,0,r1 /* to clear the reservation */ - - lwz r11,_LINK(r1) - mtlr r11 - lwz r10,_CCR(r1) - mtcrf 0xff,r10 - lwz r9,_DEAR(r1) - lwz r10,_ESR(r1) - mtspr SPRN_DEAR,r9 - mtspr SPRN_ESR,r10 - lwz r11,_NIP(r1) - lwz r12,_MSR(r1) - mtspr SPRN_MCSRR0,r11 - mtspr SPRN_MCSRR1,r12 - lwz r9,GPR9(r1) - lwz r12,GPR12(r1) - lwz r10,GPR10(r1) - lwz r11,GPR11(r1) - lwz r1,GPR1(r1) - RFMCI + RET_FROM_EXC_LEVEL(SPRN_MCSRR0, SPRN_MCSRR1, RFMCI) #endif /* CONFIG_BOOKE */ /* |