diff options
Diffstat (limited to 'arch/powerpc/kernel/head_8xx.S')
| -rw-r--r-- | arch/powerpc/kernel/head_8xx.S | 72 |
1 files changed, 71 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/head_8xx.S b/arch/powerpc/kernel/head_8xx.S index 1a9c99d..c032fe8c 100644 --- a/arch/powerpc/kernel/head_8xx.S +++ b/arch/powerpc/kernel/head_8xx.S @@ -329,6 +329,12 @@ InstructionTLBMiss: mtspr SPRN_SPRG_SCRATCH2, r3 #endif EXCEPTION_PROLOG_0 +#ifdef CONFIG_PPC_8xx_PERF_EVENT + lis r10, (itlb_miss_counter - PAGE_OFFSET)@ha + lwz r11, (itlb_miss_counter - PAGE_OFFSET)@l(r10) + addi r11, r11, 1 + stw r11, (itlb_miss_counter - PAGE_OFFSET)@l(r10) +#endif /* If we are faulting a kernel address, we have to use the * kernel page tables. @@ -429,6 +435,12 @@ InstructionTLBMiss: DataStoreTLBMiss: mtspr SPRN_SPRG_SCRATCH2, r3 EXCEPTION_PROLOG_0 +#ifdef CONFIG_PPC_8xx_PERF_EVENT + lis r10, (dtlb_miss_counter - PAGE_OFFSET)@ha + lwz r11, (dtlb_miss_counter - PAGE_OFFSET)@l(r10) + addi r11, r11, 1 + stw r11, (dtlb_miss_counter - PAGE_OFFSET)@l(r10) +#endif mfcr r3 /* If we are faulting a kernel address, we have to use the @@ -561,6 +573,7 @@ InstructionTLBError: andis. r10,r5,0x4000 beq+ 1f tlbie r4 +itlbie: /* 0x400 is InstructionAccess exception, needed by bad_page_fault() */ 1: EXC_XFER_LITE(0x400, handle_page_fault) @@ -585,6 +598,7 @@ DARFixed:/* Return from dcbx instruction bug workaround */ andis. r10,r5,0x4000 beq+ 1f tlbie r4 +dtlbie: 1: li r10,RPN_PATTERN mtspr SPRN_DAR,r10 /* Tag DAR, to be used in DTLB Error */ /* 0x300 is DataAccess exception, needed by bad_page_fault() */ @@ -602,8 +616,43 @@ DARFixed:/* Return from dcbx instruction bug workaround */ * support of breakpoints and such. Someday I will get around to * using them. */ - EXCEPTION(0x1c00, Trap_1c, unknown_exception, EXC_XFER_EE) + . = 0x1c00 +DataBreakpoint: + EXCEPTION_PROLOG_0 + mfcr r10 + mfspr r11, SPRN_SRR0 + cmplwi cr0, r11, (dtlbie - PAGE_OFFSET)@l + cmplwi cr7, r11, (itlbie - PAGE_OFFSET)@l + beq- cr0, 11f + beq- cr7, 11f + EXCEPTION_PROLOG_1 + EXCEPTION_PROLOG_2 + addi r3,r1,STACK_FRAME_OVERHEAD + mfspr r4,SPRN_BAR + stw r4,_DAR(r11) + mfspr r5,SPRN_DSISR + EXC_XFER_EE(0x1c00, do_break) +11: + mtcr r10 + EXCEPTION_EPILOG_0 + rfi + +#ifdef CONFIG_PPC_8xx_PERF_EVENT + . = 0x1d00 +InstructionBreakpoint: + EXCEPTION_PROLOG_0 + lis r10, (instruction_counter - PAGE_OFFSET)@ha + lwz r11, (instruction_counter - PAGE_OFFSET)@l(r10) + addi r11, r11, -1 + stw r11, (instruction_counter - PAGE_OFFSET)@l(r10) + lis r10, 0xffff + ori r10, r10, 0x01 + mtspr SPRN_COUNTA, r10 + EXCEPTION_EPILOG_0 + rfi +#else EXCEPTION(0x1d00, Trap_1d, unknown_exception, EXC_XFER_EE) +#endif EXCEPTION(0x1e00, Trap_1e, unknown_exception, EXC_XFER_EE) EXCEPTION(0x1f00, Trap_1f, unknown_exception, EXC_XFER_EE) @@ -977,6 +1026,14 @@ initial_mmu: lis r8, IDC_ENABLE@h mtspr SPRN_DC_CST, r8 #endif + /* Disable debug mode entry on breakpoints */ + mfspr r8, SPRN_DER +#ifdef CONFIG_PPC_8xx_PERF_EVENT + rlwinm r8, r8, 0, ~0xc +#else + rlwinm r8, r8, 0, ~0x8 +#endif + mtspr SPRN_DER, r8 blr @@ -1010,3 +1067,16 @@ cpu6_errata_word: .space 16 #endif +#ifdef CONFIG_PPC_8xx_PERF_EVENT + .globl itlb_miss_counter +itlb_miss_counter: + .space 4 + + .globl dtlb_miss_counter +dtlb_miss_counter: + .space 4 + + .globl instruction_counter +instruction_counter: + .space 4 +#endif |
