diff options
Diffstat (limited to 'arch/powerpc/kernel/head_8xx.S')
| -rw-r--r-- | arch/powerpc/kernel/head_8xx.S | 156 |
1 files changed, 71 insertions, 85 deletions
diff --git a/arch/powerpc/kernel/head_8xx.S b/arch/powerpc/kernel/head_8xx.S index 46dff3f9c31f..7d445e4342c0 100644 --- a/arch/powerpc/kernel/head_8xx.S +++ b/arch/powerpc/kernel/head_8xx.S @@ -29,6 +29,13 @@ #include <asm/ptrace.h> #include <asm/export.h> #include <asm/code-patching-asm.h> +#include <asm/interrupt.h> + +/* + * Value for the bits that have fixed value in RPN entries. + * Also used for tagging DAR for DTLBerror. + */ +#define RPN_PATTERN 0x00f0 #include "head_32.h" @@ -42,12 +49,6 @@ #endif .endm -/* - * Value for the bits that have fixed value in RPN entries. - * Also used for tagging DAR for DTLBerror. - */ -#define RPN_PATTERN 0x00f0 - #define PAGE_SHIFT_512K 19 #define PAGE_SHIFT_8M 23 @@ -118,56 +119,54 @@ instruction_counter: #endif /* System reset */ - EXCEPTION(0x100, Reset, system_reset_exception, EXC_XFER_STD) + EXCEPTION(INTERRUPT_SYSTEM_RESET, Reset, system_reset_exception) /* Machine check */ - . = 0x200 -MachineCheck: - EXCEPTION_PROLOG handle_dar_dsisr=1 - save_dar_dsisr_on_stack r4, r5, r11 - li r6, RPN_PATTERN - mtspr SPRN_DAR, r6 /* Tag DAR, to be used in DTLB Error */ - addi r3,r1,STACK_FRAME_OVERHEAD - EXC_XFER_STD(0x200, machine_check_exception) + START_EXCEPTION(INTERRUPT_MACHINE_CHECK, MachineCheck) + EXCEPTION_PROLOG INTERRUPT_MACHINE_CHECK MachineCheck handle_dar_dsisr=1 + prepare_transfer_to_handler + bl machine_check_exception + b interrupt_return /* External interrupt */ - EXCEPTION(0x500, HardwareInterrupt, do_IRQ, EXC_XFER_LITE) + EXCEPTION(INTERRUPT_EXTERNAL, HardwareInterrupt, do_IRQ) /* Alignment exception */ - . = 0x600 -Alignment: - EXCEPTION_PROLOG handle_dar_dsisr=1 - save_dar_dsisr_on_stack r4, r5, r11 - li r6, RPN_PATTERN - mtspr SPRN_DAR, r6 /* Tag DAR, to be used in DTLB Error */ - addi r3,r1,STACK_FRAME_OVERHEAD - b .Lalignment_exception_ool + START_EXCEPTION(INTERRUPT_ALIGNMENT, Alignment) + EXCEPTION_PROLOG INTERRUPT_ALIGNMENT Alignment handle_dar_dsisr=1 + prepare_transfer_to_handler + bl alignment_exception + REST_NVGPRS(r1) + b interrupt_return /* Program check exception */ - EXCEPTION(0x700, ProgramCheck, program_check_exception, EXC_XFER_STD) + START_EXCEPTION(INTERRUPT_PROGRAM, ProgramCheck) + EXCEPTION_PROLOG INTERRUPT_PROGRAM ProgramCheck + prepare_transfer_to_handler + bl program_check_exception + REST_NVGPRS(r1) + b interrupt_return /* Decrementer */ - EXCEPTION(0x900, Decrementer, timer_interrupt, EXC_XFER_LITE) - - /* With VMAP_STACK there's not enough room for this at 0x600 */ - . = 0xa00 -.Lalignment_exception_ool: - EXC_XFER_STD(0x600, alignment_exception) + EXCEPTION(INTERRUPT_DECREMENTER, Decrementer, timer_interrupt) /* System call */ - . = 0xc00 -SystemCall: - SYSCALL_ENTRY 0xc00 + START_EXCEPTION(INTERRUPT_SYSCALL, SystemCall) + SYSCALL_ENTRY INTERRUPT_SYSCALL /* Single step - not used on 601 */ - EXCEPTION(0xd00, SingleStep, single_step_exception, EXC_XFER_STD) + EXCEPTION(INTERRUPT_TRACE, SingleStep, single_step_exception) /* On the MPC8xx, this is a software emulation interrupt. It occurs * for all unimplemented and illegal instructions. */ - EXCEPTION(0x1000, SoftEmu, emulation_assist_interrupt, EXC_XFER_STD) + START_EXCEPTION(INTERRUPT_SOFT_EMU_8xx, SoftEmu) + EXCEPTION_PROLOG INTERRUPT_SOFT_EMU_8xx SoftEmu + prepare_transfer_to_handler + bl emulation_assist_interrupt + REST_NVGPRS(r1) + b interrupt_return - . = 0x1100 /* * For the MPC8xx, this is a software tablewalk to load the instruction * TLB. The task switch loads the M_TWB register with the pointer to the first @@ -189,7 +188,7 @@ SystemCall: #define INVALIDATE_ADJACENT_PAGES_CPU15(addr, tmp) #endif -InstructionTLBMiss: + START_EXCEPTION(INTERRUPT_INST_TLB_MISS_8xx, InstructionTLBMiss) mtspr SPRN_SPRG_SCRATCH2, r10 mtspr SPRN_M_TW, r11 @@ -245,8 +244,7 @@ InstructionTLBMiss: rfi #endif - . = 0x1200 -DataStoreTLBMiss: + START_EXCEPTION(INTERRUPT_DATA_TLB_MISS_8xx, DataStoreTLBMiss) mtspr SPRN_SPRG_SCRATCH2, r10 mtspr SPRN_M_TW, r11 mfcr r11 @@ -309,83 +307,74 @@ DataStoreTLBMiss: * to many reasons, such as executing guarded memory or illegal instruction * addresses. There is nothing to do but handle a big time error fault. */ - . = 0x1300 -InstructionTLBError: - EXCEPTION_PROLOG + START_EXCEPTION(INTERRUPT_INST_TLB_ERROR_8xx, InstructionTLBError) + /* 0x400 is InstructionAccess exception, needed by bad_page_fault() */ + EXCEPTION_PROLOG INTERRUPT_INST_STORAGE InstructionTLBError andis. r5,r9,DSISR_SRR1_MATCH_32S@h /* Filter relevant SRR1 bits */ andis. r10,r9,SRR1_ISI_NOPT@h beq+ .Litlbie tlbie r12 - /* 0x400 is InstructionAccess exception, needed by bad_page_fault() */ .Litlbie: stw r12, _DAR(r11) stw r5, _DSISR(r11) - EXC_XFER_LITE(0x400, handle_page_fault) + prepare_transfer_to_handler + bl do_page_fault + b interrupt_return /* This is the data TLB error on the MPC8xx. This could be due to * many reasons, including a dirty update to a pte. We bail out to * a higher level function that can handle it. */ - . = 0x1400 -DataTLBError: + START_EXCEPTION(INTERRUPT_DATA_TLB_ERROR_8xx, DataTLBError) EXCEPTION_PROLOG_0 handle_dar_dsisr=1 mfspr r11, SPRN_DAR cmpwi cr1, r11, RPN_PATTERN beq- cr1, FixupDAR /* must be a buggy dcbX, icbi insn. */ DARFixed:/* Return from dcbx instruction bug workaround */ -#ifdef CONFIG_VMAP_STACK - li r11, RPN_PATTERN - mtspr SPRN_DAR, r11 /* Tag DAR, to be used in DTLB Error */ -#endif EXCEPTION_PROLOG_1 - EXCEPTION_PROLOG_2 handle_dar_dsisr=1 - get_and_save_dar_dsisr_on_stack r4, r5, r11 + /* 0x300 is DataAccess exception, needed by bad_page_fault() */ + EXCEPTION_PROLOG_2 INTERRUPT_DATA_STORAGE DataTLBError handle_dar_dsisr=1 + lwz r4, _DAR(r11) + lwz r5, _DSISR(r11) andis. r10,r5,DSISR_NOHPTE@h beq+ .Ldtlbie tlbie r4 .Ldtlbie: -#ifndef CONFIG_VMAP_STACK - li r10,RPN_PATTERN - mtspr SPRN_DAR,r10 /* Tag DAR, to be used in DTLB Error */ -#endif - /* 0x300 is DataAccess exception, needed by bad_page_fault() */ - EXC_XFER_LITE(0x300, handle_page_fault) + prepare_transfer_to_handler + bl do_page_fault + b interrupt_return -stack_overflow: +#ifdef CONFIG_VMAP_STACK vmap_stack_overflow_exception +#endif /* On the MPC8xx, these next four traps are used for development * support of breakpoints and such. Someday I will get around to * using them. */ -do_databreakpoint: - EXCEPTION_PROLOG_1 - EXCEPTION_PROLOG_2 handle_dar_dsisr=1 - addi r3,r1,STACK_FRAME_OVERHEAD - mfspr r4,SPRN_BAR - stw r4,_DAR(r11) -#ifndef CONFIG_VMAP_STACK - mfspr r5,SPRN_DSISR - stw r5,_DSISR(r11) -#endif - EXC_XFER_STD(0x1c00, do_break) - - . = 0x1c00 -DataBreakpoint: + START_EXCEPTION(INTERRUPT_DATA_BREAKPOINT_8xx, DataBreakpoint) EXCEPTION_PROLOG_0 handle_dar_dsisr=1 mfspr r11, SPRN_SRR0 cmplwi cr1, r11, (.Ldtlbie - PAGE_OFFSET)@l cmplwi cr7, r11, (.Litlbie - PAGE_OFFSET)@l cror 4*cr1+eq, 4*cr1+eq, 4*cr7+eq - bne cr1, do_databreakpoint + bne cr1, 1f mtcr r10 mfspr r10, SPRN_SPRG_SCRATCH0 mfspr r11, SPRN_SPRG_SCRATCH1 rfi +1: EXCEPTION_PROLOG_1 + EXCEPTION_PROLOG_2 INTERRUPT_DATA_BREAKPOINT_8xx DataBreakpoint handle_dar_dsisr=1 + mfspr r4,SPRN_BAR + stw r4,_DAR(r11) + prepare_transfer_to_handler + bl do_break + REST_NVGPRS(r1) + b interrupt_return + #ifdef CONFIG_PERF_EVENTS - . = 0x1d00 -InstructionBreakpoint: + START_EXCEPTION(INTERRUPT_INST_BREAKPOINT_8xx, InstructionBreakpoint) mtspr SPRN_SPRG_SCRATCH0, r10 lwz r10, (instruction_counter - PAGE_OFFSET)@l(0) addi r10, r10, -1 @@ -396,11 +385,12 @@ InstructionBreakpoint: mfspr r10, SPRN_SPRG_SCRATCH0 rfi #else - EXCEPTION(0x1d00, Trap_1d, unknown_exception, EXC_XFER_STD) + EXCEPTION(INTERRUPT_INST_BREAKPOINT_8xx, Trap_1d, unknown_exception) #endif - EXCEPTION(0x1e00, Trap_1e, unknown_exception, EXC_XFER_STD) - EXCEPTION(0x1f00, Trap_1f, unknown_exception, EXC_XFER_STD) + EXCEPTION(0x1e00, Trap_1e, unknown_exception) + EXCEPTION(0x1f00, Trap_1f, unknown_exception) + __HEAD . = 0x2000 /* This is the procedure to calculate the data EA for buggy dcbx,dcbi instructions @@ -510,14 +500,10 @@ FixupDAR:/* Entry point for dcbx workaround. */ 152: mfdar r11 mtctr r11 /* restore ctr reg from DAR */ -#ifdef CONFIG_VMAP_STACK mfspr r11, SPRN_SPRG_THREAD stw r10, DAR(r11) mfspr r10, SPRN_DSISR stw r10, DSISR(r11) -#else - mtdar r10 /* save fault EA to DAR */ -#endif mfspr r10,SPRN_M_TW b DARFixed /* Go back to normal TLB handling */ @@ -819,7 +805,7 @@ EXPORT_SYMBOL(empty_zero_page) swapper_pg_dir: .space PGD_TABLE_SIZE -/* Room for two PTE table poiners, usually the kernel and current user +/* Room for two PTE table pointers, usually the kernel and current user * pointer to their respective root page table (pgdir). */ .globl abatron_pteptrs |