diff options
Diffstat (limited to 'arch/ppc/kernel/head_booke.h')
| -rw-r--r-- | arch/ppc/kernel/head_booke.h | 94 |
1 files changed, 24 insertions, 70 deletions
diff --git a/arch/ppc/kernel/head_booke.h b/arch/ppc/kernel/head_booke.h index f213d12eec0..9c50f9d2657 100644 --- a/arch/ppc/kernel/head_booke.h +++ b/arch/ppc/kernel/head_booke.h @@ -67,46 +67,36 @@ #define CRIT_STACK_TOP (exception_stack_top) #ifdef CONFIG_SMP -#define BOOKE_LOAD_CRIT_STACK \ +#define BOOKE_LOAD_EXC_LEVEL_STACK(level) \ mfspr r8,SPRN_PIR; \ mulli r8,r8,BOOKE_EXCEPTION_STACK_SIZE; \ neg r8,r8; \ - addis r8,r8,CRIT_STACK_TOP@ha; \ - addi r8,r8,CRIT_STACK_TOP@l -#define BOOKE_LOAD_MCHECK_STACK \ - mfspr r8,SPRN_PIR; \ - mulli r8,r8,BOOKE_EXCEPTION_STACK_SIZE; \ - neg r8,r8; \ - addis r8,r8,MCHECK_STACK_TOP@ha; \ - addi r8,r8,MCHECK_STACK_TOP@l + addis r8,r8,level##_STACK_TOP@ha; \ + addi r8,r8,level##_STACK_TOP@l #else -#define BOOKE_LOAD_CRIT_STACK \ - lis r8,CRIT_STACK_TOP@h; \ - ori r8,r8,CRIT_STACK_TOP@l -#define BOOKE_LOAD_MCHECK_STACK \ - lis r8,MCHECK_STACK_TOP@h; \ - ori r8,r8,MCHECK_STACK_TOP@l +#define BOOKE_LOAD_EXC_LEVEL_STACK(level) \ + lis r8,level##_STACK_TOP@h; \ + ori r8,r8,level##_STACK_TOP@l #endif /* - * Exception prolog for critical exceptions. This is a little different - * from the normal exception prolog above since a critical exception - * can potentially occur at any point during normal exception processing. - * Thus we cannot use the same SPRG registers as the normal prolog above. - * Instead we use a portion of the critical exception stack at low physical - * addresses. + * Exception prolog for critical/machine check exceptions. This is a + * little different from the normal exception prolog above since a + * critical/machine check exception can potentially occur at any point + * during normal exception processing. Thus we cannot use the same SPRG + * registers as the normal prolog above. Instead we use a portion of the + * critical/machine check exception stack at low physical addresses. */ - -#define CRITICAL_EXCEPTION_PROLOG \ - mtspr CRIT_SPRG,r8; \ - BOOKE_LOAD_CRIT_STACK; /* r8 points to the crit stack */ \ +#define EXC_LEVEL_EXCEPTION_PROLOG(exc_level, exc_level_srr0, exc_level_srr1) \ + mtspr exc_level##_SPRG,r8; \ + BOOKE_LOAD_EXC_LEVEL_STACK(exc_level);/* r8 points to the exc_level stack*/ \ stw r10,GPR10-INT_FRAME_SIZE(r8); \ stw r11,GPR11-INT_FRAME_SIZE(r8); \ mfcr r10; /* save CR in r10 for now */\ - mfspr r11,SPRN_CSRR1; /* check whether user or kernel */\ + mfspr r11,exc_level_srr1; /* check whether user or kernel */\ andi. r11,r11,MSR_PR; \ mr r11,r8; \ - mfspr r8,CRIT_SPRG; \ + mfspr r8,exc_level##_SPRG; \ beq 1f; \ /* COMING FROM USER MODE */ \ mfspr r11,SPRN_SPRG3; /* if from user, start at top of */\ @@ -122,9 +112,9 @@ stw r12,_DEAR(r11); /* since they may have had stuff */\ mfspr r9,SPRN_ESR; /* in them at the point where the */\ stw r9,_ESR(r11); /* exception was taken */\ - mfspr r12,SPRN_CSRR0; \ + mfspr r12,exc_level_srr0; \ stw r1,GPR1(r11); \ - mfspr r9,SPRN_CSRR1; \ + mfspr r9,exc_level_srr1; \ stw r1,0(r11); \ mr r1,r11; \ rlwinm r9,r9,0,14,12; /* clear MSR_WE (necessary?) */\ @@ -132,45 +122,10 @@ SAVE_4GPRS(3, r11); \ SAVE_2GPRS(7, r11) -/* - * Exception prolog for machine check exceptions. This is similar to - * the critical exception prolog, except that machine check exceptions - * have their stack. - */ -#define MCHECK_EXCEPTION_PROLOG \ - mtspr MCHECK_SPRG,r8; \ - BOOKE_LOAD_MCHECK_STACK; /* r8 points to the mcheck stack */\ - stw r10,GPR10-INT_FRAME_SIZE(r8); \ - stw r11,GPR11-INT_FRAME_SIZE(r8); \ - mfcr r10; /* save CR in r10 for now */\ - mfspr r11,SPRN_MCSRR1; /* check whether user or kernel */\ - andi. r11,r11,MSR_PR; \ - mr r11,r8; \ - mfspr r8,MCHECK_SPRG; \ - beq 1f; \ - /* COMING FROM USER MODE */ \ - mfspr r11,SPRN_SPRG3; /* if from user, start at top of */\ - lwz r11,THREAD_INFO-THREAD(r11); /* this thread's kernel stack */\ - addi r11,r11,THREAD_SIZE; \ -1: subi r11,r11,INT_FRAME_SIZE; /* Allocate an exception frame */\ - stw r10,_CCR(r11); /* save various registers */\ - stw r12,GPR12(r11); \ - stw r9,GPR9(r11); \ - mflr r10; \ - stw r10,_LINK(r11); \ - mfspr r12,SPRN_DEAR; /* save DEAR and ESR in the frame */\ - stw r12,_DEAR(r11); /* since they may have had stuff */\ - mfspr r9,SPRN_ESR; /* in them at the point where the */\ - stw r9,_ESR(r11); /* exception was taken */\ - mfspr r12,SPRN_MCSRR0; \ - stw r1,GPR1(r11); \ - mfspr r9,SPRN_MCSRR1; \ - stw r1,0(r11); \ - mr r1,r11; \ - rlwinm r9,r9,0,14,12; /* clear MSR_WE (necessary?) */\ - stw r0,GPR0(r11); \ - SAVE_4GPRS(3, r11); \ - SAVE_2GPRS(7, r11) +#define CRITICAL_EXCEPTION_PROLOG \ + EXC_LEVEL_EXCEPTION_PROLOG(CRIT, SPRN_CSRR0, SPRN_CSRR1) +#define MCHECK_EXCEPTION_PROLOG \ + EXC_LEVEL_EXCEPTION_PROLOG(MCHECK, SPRN_MCSRR0, SPRN_MCSRR1) /* * Exception vectors. @@ -237,7 +192,6 @@ label: EXC_XFER_TEMPLATE(hdlr, n+1, MSR_KERNEL, COPY_EE, transfer_to_handler, \ ret_from_except) - /* Check for a single step debug exception while in an exception * handler before state has been saved. This is to catch the case * where an instruction that we are trying to single step causes @@ -291,7 +245,7 @@ label: lwz r9,GPR9(r11); \ lwz r12,GPR12(r11); \ mtspr CRIT_SPRG,r8; \ - BOOKE_LOAD_CRIT_STACK; /* r8 points to the crit stack */ \ + BOOKE_LOAD_EXC_LEVEL_STACK(CRIT); /* r8 points to the debug stack */ \ lwz r10,GPR10-INT_FRAME_SIZE(r8); \ lwz r11,GPR11-INT_FRAME_SIZE(r8); \ mfspr r8,CRIT_SPRG; \ |