diff options
Diffstat (limited to 'arch/powerpc/kernel/entry_32.S')
| -rw-r--r-- | arch/powerpc/kernel/entry_32.S | 125 |
1 files changed, 123 insertions, 2 deletions
diff --git a/arch/powerpc/kernel/entry_32.S b/arch/powerpc/kernel/entry_32.S index c94aba54b5dd..fe21674d4f06 100644 --- a/arch/powerpc/kernel/entry_32.S +++ b/arch/powerpc/kernel/entry_32.S @@ -46,14 +46,52 @@ #ifdef CONFIG_BOOKE .globl mcheck_transfer_to_handler mcheck_transfer_to_handler: - b transfer_to_handler_full + mfspr r0,SPRN_DSRR0 + stw r0,_DSRR0(r11) + mfspr r0,SPRN_DSRR1 + stw r0,_DSRR1(r11) + /* fall through */ .globl debug_transfer_to_handler debug_transfer_to_handler: - b transfer_to_handler_full + mfspr r0,SPRN_CSRR0 + stw r0,_CSRR0(r11) + mfspr r0,SPRN_CSRR1 + stw r0,_CSRR1(r11) + /* fall through */ .globl crit_transfer_to_handler crit_transfer_to_handler: +#ifdef CONFIG_FSL_BOOKE + mfspr r0,SPRN_MAS0 + stw r0,MAS0(r11) + mfspr r0,SPRN_MAS1 + stw r0,MAS1(r11) + mfspr r0,SPRN_MAS2 + stw r0,MAS2(r11) + mfspr r0,SPRN_MAS3 + stw r0,MAS3(r11) + mfspr r0,SPRN_MAS6 + stw r0,MAS6(r11) +#ifdef CONFIG_PHYS_64BIT + mfspr r0,SPRN_MAS7 + stw r0,MAS7(r11) +#endif /* CONFIG_PHYS_64BIT */ +#endif /* CONFIG_FSL_BOOKE */ +#ifdef CONFIG_44x + mfspr r0,SPRN_MMUCR + stw r0,MMUCR(r11) +#endif + mfspr r0,SPRN_SRR0 + stw r0,_SRR0(r11) + mfspr r0,SPRN_SRR1 + stw r0,_SRR1(r11) + + mfspr r8,SPRN_SPRG3 + lwz r0,KSP_LIMIT(r8) + stw r0,SAVED_KSP_LIMIT(r11) + rlwimi r0,r1,0,0,(31-THREAD_SHIFT) + stw r0,KSP_LIMIT(r8) /* fall through */ #endif @@ -64,6 +102,16 @@ crit_transfer_to_handler: stw r0,GPR10(r11) lwz r0,crit_r11@l(0) stw r0,GPR11(r11) + mfspr r0,SPRN_SRR0 + stw r0,crit_srr0@l(0) + mfspr r0,SPRN_SRR1 + stw r0,crit_srr1@l(0) + + mfspr r8,SPRN_SPRG3 + lwz r0,KSP_LIMIT(r8) + stw r0,saved_ksp_limit@l(0) + rlwimi r0,r1,0,0,(31-THREAD_SHIFT) + stw r0,KSP_LIMIT(r8) /* fall through */ #endif @@ -854,17 +902,90 @@ exc_exit_restart_end: exc_lvl_rfi; \ b .; /* prevent prefetch past exc_lvl_rfi */ +#define RESTORE_xSRR(exc_lvl_srr0, exc_lvl_srr1) \ + lwz r9,_##exc_lvl_srr0(r1); \ + lwz r10,_##exc_lvl_srr1(r1); \ + mtspr SPRN_##exc_lvl_srr0,r9; \ + mtspr SPRN_##exc_lvl_srr1,r10; + +#if defined(CONFIG_FSL_BOOKE) +#ifdef CONFIG_PHYS_64BIT +#define RESTORE_MAS7 \ + lwz r11,MAS7(r1); \ + mtspr SPRN_MAS7,r11; +#else +#define RESTORE_MAS7 +#endif /* CONFIG_PHYS_64BIT */ +#define RESTORE_MMU_REGS \ + lwz r9,MAS0(r1); \ + lwz r10,MAS1(r1); \ + lwz r11,MAS2(r1); \ + mtspr SPRN_MAS0,r9; \ + lwz r9,MAS3(r1); \ + mtspr SPRN_MAS1,r10; \ + lwz r10,MAS6(r1); \ + mtspr SPRN_MAS2,r11; \ + mtspr SPRN_MAS3,r9; \ + mtspr SPRN_MAS6,r10; \ + RESTORE_MAS7; +#elif defined(CONFIG_44x) +#define RESTORE_MMU_REGS \ + lwz r9,MMUCR(r1); \ + mtspr SPRN_MMUCR,r9; +#else +#define RESTORE_MMU_REGS +#endif + +#ifdef CONFIG_40x .globl ret_from_crit_exc ret_from_crit_exc: + mfspr r9,SPRN_SPRG3 + lis r10,saved_ksp_limit@ha; + lwz r10,saved_ksp_limit@l(r10); + tovirt(r9,r9); + stw r10,KSP_LIMIT(r9) + lis r9,crit_srr0@ha; + lwz r9,crit_srr0@l(r9); + lis r10,crit_srr1@ha; + lwz r10,crit_srr1@l(r10); + mtspr SPRN_SRR0,r9; + mtspr SPRN_SRR1,r10; RET_FROM_EXC_LEVEL(SPRN_CSRR0, SPRN_CSRR1, RFCI) +#endif /* CONFIG_40x */ #ifdef CONFIG_BOOKE + .globl ret_from_crit_exc +ret_from_crit_exc: + mfspr r9,SPRN_SPRG3 + lwz r10,SAVED_KSP_LIMIT(r1) + stw r10,KSP_LIMIT(r9) + RESTORE_xSRR(SRR0,SRR1); + RESTORE_MMU_REGS; + RET_FROM_EXC_LEVEL(SPRN_CSRR0, SPRN_CSRR1, RFCI) + .globl ret_from_debug_exc ret_from_debug_exc: + mfspr r9,SPRN_SPRG3 + lwz r10,SAVED_KSP_LIMIT(r1) + stw r10,KSP_LIMIT(r9) + lwz r9,THREAD_INFO-THREAD(r9) + rlwinm r10,r1,0,0,(31-THREAD_SHIFT) + lwz r10,TI_PREEMPT(r10) + stw r10,TI_PREEMPT(r9) + RESTORE_xSRR(SRR0,SRR1); + RESTORE_xSRR(CSRR0,CSRR1); + RESTORE_MMU_REGS; RET_FROM_EXC_LEVEL(SPRN_DSRR0, SPRN_DSRR1, RFDI) .globl ret_from_mcheck_exc ret_from_mcheck_exc: + mfspr r9,SPRN_SPRG3 + lwz r10,SAVED_KSP_LIMIT(r1) + stw r10,KSP_LIMIT(r9) + RESTORE_xSRR(SRR0,SRR1); + RESTORE_xSRR(CSRR0,CSRR1); + RESTORE_xSRR(DSRR0,DSRR1); + RESTORE_MMU_REGS; RET_FROM_EXC_LEVEL(SPRN_MCSRR0, SPRN_MCSRR1, RFMCI) #endif /* CONFIG_BOOKE */ |