diff options
Diffstat (limited to 'arch/powerpc/kernel/head_8xx.S')
| -rw-r--r-- | arch/powerpc/kernel/head_8xx.S | 136 |
1 files changed, 22 insertions, 114 deletions
diff --git a/arch/powerpc/kernel/head_8xx.S b/arch/powerpc/kernel/head_8xx.S index 03c73b4c6435..885be7f3d29a 100644 --- a/arch/powerpc/kernel/head_8xx.S +++ b/arch/powerpc/kernel/head_8xx.S @@ -33,6 +33,8 @@ #include <asm/export.h> #include <asm/code-patching-asm.h> +#include "head_32.h" + #if CONFIG_TASK_SIZE <= 0x80000000 && CONFIG_PAGE_OFFSET >= 0x80000000 /* By simply checking Address >= 0x80000000, we know if its a kernel address */ #define SIMPLE_KERNEL_ADDRESS 1 @@ -123,102 +125,6 @@ instruction_counter: .space 4 #endif -/* - * Exception entry code. This code runs with address translation - * turned off, i.e. using physical addresses. - * We assume sprg3 has the physical address of the current - * task's thread_struct. - */ -#define EXCEPTION_PROLOG \ - mtspr SPRN_SPRG_SCRATCH0, r10; \ - mtspr SPRN_SPRG_SCRATCH1, r11; \ - mfcr r10; \ - EXCEPTION_PROLOG_1; \ - EXCEPTION_PROLOG_2 - -#define EXCEPTION_PROLOG_1 \ - mfspr r11,SPRN_SRR1; /* check whether user or kernel */ \ - andi. r11,r11,MSR_PR; \ - tophys(r11,r1); /* use tophys(r1) if kernel */ \ - beq 1f; \ - mfspr r11,SPRN_SPRG_THREAD; \ - lwz r11,TASK_STACK-THREAD(r11); \ - addi r11,r11,THREAD_SIZE; \ - tophys(r11,r11); \ -1: subi r11,r11,INT_FRAME_SIZE /* alloc exc. frame */ - - -#define EXCEPTION_PROLOG_2 \ - stw r10,_CCR(r11); /* save registers */ \ - stw r12,GPR12(r11); \ - stw r9,GPR9(r11); \ - mfspr r10,SPRN_SPRG_SCRATCH0; \ - stw r10,GPR10(r11); \ - mfspr r12,SPRN_SPRG_SCRATCH1; \ - stw r12,GPR11(r11); \ - mflr r10; \ - stw r10,_LINK(r11); \ - mfspr r12,SPRN_SRR0; \ - mfspr r9,SPRN_SRR1; \ - stw r1,GPR1(r11); \ - stw r1,0(r11); \ - tovirt(r1,r11); /* set new kernel sp */ \ - li r10,MSR_KERNEL & ~(MSR_IR|MSR_DR); /* can take exceptions */ \ - mtmsr r10; \ - stw r0,GPR0(r11); \ - lis r10, STACK_FRAME_REGS_MARKER@ha; /* exception frame marker */ \ - addi r10, r10, STACK_FRAME_REGS_MARKER@l; \ - stw r10, 8(r11); \ - SAVE_4GPRS(3, r11); \ - SAVE_2GPRS(7, r11) - -/* - * Note: code which follows this uses cr0.eq (set if from kernel), - * r11, r12 (SRR0), and r9 (SRR1). - * - * Note2: once we have set r1 we are in a position to take exceptions - * again, and we could thus set MSR:RI at that point. - */ - -/* - * Exception vectors. - */ -#define EXCEPTION(n, label, hdlr, xfer) \ - . = n; \ -label: \ - EXCEPTION_PROLOG; \ - addi r3,r1,STACK_FRAME_OVERHEAD; \ - xfer(n, hdlr) - -#define EXC_XFER_TEMPLATE(n, hdlr, trap, copyee, tfer, ret) \ - li r10,trap; \ - stw r10,_TRAP(r11); \ - li r10,MSR_KERNEL; \ - copyee(r10, r9); \ - bl tfer; \ -i##n: \ - .long hdlr; \ - .long ret - -#define COPY_EE(d, s) rlwimi d,s,0,16,16 -#define NOCOPY(d, s) - -#define EXC_XFER_STD(n, hdlr) \ - EXC_XFER_TEMPLATE(n, hdlr, n, NOCOPY, transfer_to_handler_full, \ - ret_from_except_full) - -#define EXC_XFER_LITE(n, hdlr) \ - EXC_XFER_TEMPLATE(n, hdlr, n+1, NOCOPY, transfer_to_handler, \ - ret_from_except) - -#define EXC_XFER_EE(n, hdlr) \ - EXC_XFER_TEMPLATE(n, hdlr, n, COPY_EE, transfer_to_handler_full, \ - ret_from_except_full) - -#define EXC_XFER_EE_LITE(n, hdlr) \ - EXC_XFER_TEMPLATE(n, hdlr, n+1, COPY_EE, transfer_to_handler, \ - ret_from_except) - /* System reset */ EXCEPTION(0x100, Reset, system_reset_exception, EXC_XFER_STD) @@ -261,7 +167,7 @@ Alignment: mfspr r5,SPRN_DSISR stw r5,_DSISR(r11) addi r3,r1,STACK_FRAME_OVERHEAD - EXC_XFER_EE(0x600, alignment_exception) + EXC_XFER_STD(0x600, alignment_exception) /* Program check exception */ EXCEPTION(0x700, ProgramCheck, program_check_exception, EXC_XFER_STD) @@ -273,19 +179,18 @@ Alignment: /* Decrementer */ EXCEPTION(0x900, Decrementer, timer_interrupt, EXC_XFER_LITE) - EXCEPTION(0xa00, Trap_0a, unknown_exception, EXC_XFER_EE) - EXCEPTION(0xb00, Trap_0b, unknown_exception, EXC_XFER_EE) + EXCEPTION(0xa00, Trap_0a, unknown_exception, EXC_XFER_STD) + EXCEPTION(0xb00, Trap_0b, unknown_exception, EXC_XFER_STD) /* System call */ . = 0xc00 SystemCall: - EXCEPTION_PROLOG - EXC_XFER_EE_LITE(0xc00, DoSyscall) + SYSCALL_ENTRY 0xc00 /* Single step - not used on 601 */ EXCEPTION(0xd00, SingleStep, single_step_exception, EXC_XFER_STD) - EXCEPTION(0xe00, Trap_0e, unknown_exception, EXC_XFER_EE) - EXCEPTION(0xf00, Trap_0f, unknown_exception, EXC_XFER_EE) + EXCEPTION(0xe00, Trap_0e, unknown_exception, EXC_XFER_STD) + EXCEPTION(0xf00, Trap_0f, unknown_exception, EXC_XFER_STD) /* On the MPC8xx, this is a software emulation interrupt. It occurs * for all unimplemented and illegal instructions. @@ -615,13 +520,13 @@ DARFixed:/* Return from dcbx instruction bug workaround */ /* 0x300 is DataAccess exception, needed by bad_page_fault() */ EXC_XFER_LITE(0x300, handle_page_fault) - EXCEPTION(0x1500, Trap_15, unknown_exception, EXC_XFER_EE) - EXCEPTION(0x1600, Trap_16, unknown_exception, EXC_XFER_EE) - EXCEPTION(0x1700, Trap_17, unknown_exception, EXC_XFER_EE) - EXCEPTION(0x1800, Trap_18, unknown_exception, EXC_XFER_EE) - EXCEPTION(0x1900, Trap_19, unknown_exception, EXC_XFER_EE) - EXCEPTION(0x1a00, Trap_1a, unknown_exception, EXC_XFER_EE) - EXCEPTION(0x1b00, Trap_1b, unknown_exception, EXC_XFER_EE) + EXCEPTION(0x1500, Trap_15, unknown_exception, EXC_XFER_STD) + EXCEPTION(0x1600, Trap_16, unknown_exception, EXC_XFER_STD) + EXCEPTION(0x1700, Trap_17, unknown_exception, EXC_XFER_STD) + EXCEPTION(0x1800, Trap_18, unknown_exception, EXC_XFER_STD) + EXCEPTION(0x1900, Trap_19, unknown_exception, EXC_XFER_STD) + EXCEPTION(0x1a00, Trap_1a, unknown_exception, EXC_XFER_STD) + EXCEPTION(0x1b00, Trap_1b, unknown_exception, EXC_XFER_STD) /* On the MPC8xx, these next four traps are used for development * support of breakpoints and such. Someday I will get around to @@ -643,7 +548,7 @@ DataBreakpoint: mfspr r4,SPRN_BAR stw r4,_DAR(r11) mfspr r5,SPRN_DSISR - EXC_XFER_EE(0x1c00, do_break) + EXC_XFER_STD(0x1c00, do_break) 11: mtcr r10 mfspr r10, SPRN_SPRG_SCRATCH0 @@ -663,10 +568,10 @@ InstructionBreakpoint: mfspr r10, SPRN_SPRG_SCRATCH0 rfi #else - EXCEPTION(0x1d00, Trap_1d, unknown_exception, EXC_XFER_EE) + EXCEPTION(0x1d00, Trap_1d, unknown_exception, EXC_XFER_STD) #endif - EXCEPTION(0x1e00, Trap_1e, unknown_exception, EXC_XFER_EE) - EXCEPTION(0x1f00, Trap_1f, unknown_exception, EXC_XFER_EE) + EXCEPTION(0x1e00, Trap_1e, unknown_exception, EXC_XFER_STD) + EXCEPTION(0x1f00, Trap_1f, unknown_exception, EXC_XFER_STD) . = 0x2000 @@ -853,6 +758,9 @@ start_here: /* * Decide what sort of machine this is and initialize the MMU. */ +#ifdef CONFIG_KASAN + bl kasan_early_init +#endif li r3,0 mr r4,r31 bl machine_init |