mtspr SPRN_IVOR##vector_number,r26; \
sync
+#if (THREAD_SHIFT < 15)
+#define ALLOC_STACK_FRAME(reg, val) \
+ addi reg,reg,val
+#else
+#define ALLOC_STACK_FRAME(reg, val) \
+ addis reg,reg,val@ha; \
+ addi reg,reg,val@l
+#endif
+
#define NORMAL_EXCEPTION_PROLOG \
- mtspr SPRN_SPRG0,r10; /* save two registers to work with */\
- mtspr SPRN_SPRG1,r11; \
- mtspr SPRN_SPRG4W,r1; \
+ mtspr SPRN_SPRG_WSCRATCH0,r10;/* save two registers to work with */\
+ mtspr SPRN_SPRG_WSCRATCH1,r11; \
+ mtspr SPRN_SPRG_WSCRATCH2,r1; \
mfcr r10; /* save CR in r10 for now */\
mfspr r11,SPRN_SRR1; /* check whether user or kernel */\
andi. r11,r11,MSR_PR; \
beq 1f; \
- mfspr r1,SPRN_SPRG3; /* if from user, start at top of */\
+ mfspr r1,SPRN_SPRG_THREAD; /* if from user, start at top of */\
lwz r1,THREAD_INFO-THREAD(r1); /* this thread's kernel stack */\
- addi r1,r1,THREAD_SIZE; \
+ ALLOC_STACK_FRAME(r1, THREAD_SIZE); \
1: subi r1,r1,INT_FRAME_SIZE; /* Allocate an exception frame */\
mr r11,r1; \
stw r10,_CCR(r11); /* save various registers */\
stw r12,GPR12(r11); \
stw r9,GPR9(r11); \
- mfspr r10,SPRN_SPRG0; \
+ mfspr r10,SPRN_SPRG_RSCRATCH0; \
stw r10,GPR10(r11); \
- mfspr r12,SPRN_SPRG1; \
+ mfspr r12,SPRN_SPRG_RSCRATCH1; \
stw r12,GPR11(r11); \
mflr r10; \
stw r10,_LINK(r11); \
- mfspr r10,SPRN_SPRG4R; \
+ mfspr r10,SPRN_SPRG_RSCRATCH2; \
mfspr r12,SPRN_SRR0; \
stw r10,GPR1(r11); \
mfspr r9,SPRN_SRR1; \
* providing configurations that micro-optimize space usage.
*/
-/* CRIT_SPRG only used in critical exception handling */
-#define CRIT_SPRG SPRN_SPRG2
-/* MCHECK_SPRG only used in machine check exception handling */
-#define MCHECK_SPRG SPRN_SPRG6W
-
-#define MCHECK_STACK_BASE mcheckirq_ctx
+#define MC_STACK_BASE mcheckirq_ctx
#define CRIT_STACK_BASE critirq_ctx
-/* only on e200 for now */
-#define DEBUG_STACK_BASE dbgirq_ctx
-#define DEBUG_SPRG SPRN_SPRG6W
+/* only on e500mc/e200 */
+#define DBG_STACK_BASE dbgirq_ctx
-#define EXC_LVL_FRAME_OVERHEAD (THREAD_SIZE - INT_FRAME_SIZE)
+#define EXC_LVL_FRAME_OVERHEAD (THREAD_SIZE - INT_FRAME_SIZE - EXC_LVL_SIZE)
#ifdef CONFIG_SMP
#define BOOKE_LOAD_EXC_LEVEL_STACK(level) \
* critical/machine check exception stack at low physical addresses.
*/
#define EXC_LEVEL_EXCEPTION_PROLOG(exc_level, exc_level_srr0, exc_level_srr1) \
- mtspr exc_level##_SPRG,r8; \
+ mtspr SPRN_SPRG_WSCRATCH_##exc_level,r8; \
BOOKE_LOAD_EXC_LEVEL_STACK(exc_level);/* r8 points to the exc_level stack*/ \
stw r9,GPR9(r8); /* save various registers */\
mfcr r9; /* save CR in r9 for now */\
stw r9,_CCR(r8); /* save CR on stack */\
mfspr r10,exc_level_srr1; /* check whether user or kernel */\
andi. r10,r10,MSR_PR; \
- mfspr r11,SPRN_SPRG3; /* if from user, start at top of */\
+ mfspr r11,SPRN_SPRG_THREAD; /* if from user, start at top of */\
lwz r11,THREAD_INFO-THREAD(r11); /* this thread's kernel stack */\
addi r11,r11,EXC_LVL_FRAME_OVERHEAD; /* allocate stack frame */\
beq 1f; \
lwz r9,TI_TASK-EXC_LVL_FRAME_OVERHEAD(r11); \
stw r9,TI_TASK-EXC_LVL_FRAME_OVERHEAD(r8); \
mr r11,r8; \
-2: mfspr r8,exc_level##_SPRG; \
+2: mfspr r8,SPRN_SPRG_RSCRATCH_##exc_level; \
stw r12,GPR12(r11); /* save various registers */\
mflr r10; \
stw r10,_LINK(r11); \
#define CRITICAL_EXCEPTION_PROLOG \
EXC_LEVEL_EXCEPTION_PROLOG(CRIT, SPRN_CSRR0, SPRN_CSRR1)
#define DEBUG_EXCEPTION_PROLOG \
- EXC_LEVEL_EXCEPTION_PROLOG(DEBUG, SPRN_DSRR0, SPRN_DSRR1)
+ EXC_LEVEL_EXCEPTION_PROLOG(DBG, SPRN_DSRR0, SPRN_DSRR1)
#define MCHECK_EXCEPTION_PROLOG \
- EXC_LEVEL_EXCEPTION_PROLOG(MCHECK, SPRN_MCSRR0, SPRN_MCSRR1)
+ EXC_LEVEL_EXCEPTION_PROLOG(MC, SPRN_MCSRR0, SPRN_MCSRR1)
/*
* Exception vectors.
* the code where the exception occurred (since exception entry \
* doesn't turn off DE automatically). We simulate the effect \
* of turning off DE on entry to an exception handler by turning \
- * off DE in the CSRR1 value and clearing the debug status. \
+ * off DE in the DSRR1 value and clearing the debug status. \
*/ \
mfspr r10,SPRN_DBSR; /* check single-step/branch taken */ \
- andis. r10,r10,DBSR_IC@h; \
+ andis. r10,r10,(DBSR_IC|DBSR_BT)@h; \
beq+ 2f; \
\
lis r10,KERNELBASE@h; /* check if exception in vectors */ \
\
/* here it looks like we got an inappropriate debug exception. */ \
1: rlwinm r9,r9,0,~MSR_DE; /* clear DE in the CDRR1 value */ \
- lis r10,DBSR_IC@h; /* clear the IC event */ \
+ lis r10,(DBSR_IC|DBSR_BT)@h; /* clear the IC event */ \
mtspr SPRN_DBSR,r10; \
/* restore state and get out */ \
lwz r10,_CCR(r11); \
mtspr SPRN_DSRR1,r9; \
lwz r9,GPR9(r11); \
lwz r12,GPR12(r11); \
- mtspr DEBUG_SPRG,r8; \
- BOOKE_LOAD_EXC_LEVEL_STACK(DEBUG); /* r8 points to the debug stack */ \
+ mtspr SPRN_SPRG_WSCRATCH_DBG,r8; \
+ BOOKE_LOAD_EXC_LEVEL_STACK(DBG); /* r8 points to the debug stack */ \
lwz r10,GPR10(r8); \
lwz r11,GPR11(r8); \
- mfspr r8,DEBUG_SPRG; \
+ mfspr r8,SPRN_SPRG_RSCRATCH_DBG; \
\
- RFDI; \
+ PPC_RFDI; \
b .; \
\
- /* continue normal handling for a critical exception... */ \
+ /* continue normal handling for a debug exception... */ \
2: mfspr r4,SPRN_DBSR; \
addi r3,r1,STACK_FRAME_OVERHEAD; \
EXC_XFER_TEMPLATE(DebugException, 0x2008, (MSR_KERNEL & ~(MSR_ME|MSR_DE|MSR_CE)), NOCOPY, debug_transfer_to_handler, ret_from_debug_exc)
* off DE in the CSRR1 value and clearing the debug status. \
*/ \
mfspr r10,SPRN_DBSR; /* check single-step/branch taken */ \
- andis. r10,r10,DBSR_IC@h; \
+ andis. r10,r10,(DBSR_IC|DBSR_BT)@h; \
beq+ 2f; \
\
lis r10,KERNELBASE@h; /* check if exception in vectors */ \
cmplw r12,r10; \
blt+ 2f; /* addr below exception vectors */ \
\
- lis r10,DebugCrit@h; \
+ lis r10,DebugCrit@h; \
ori r10,r10,DebugCrit@l; \
cmplw r12,r10; \
bgt+ 2f; /* addr above exception vectors */ \
\
/* here it looks like we got an inappropriate debug exception. */ \
1: rlwinm r9,r9,0,~MSR_DE; /* clear DE in the CSRR1 value */ \
- lis r10,DBSR_IC@h; /* clear the IC event */ \
+ lis r10,(DBSR_IC|DBSR_BT)@h; /* clear the IC event */ \
mtspr SPRN_DBSR,r10; \
/* restore state and get out */ \
lwz r10,_CCR(r11); \
mtspr SPRN_CSRR1,r9; \
lwz r9,GPR9(r11); \
lwz r12,GPR12(r11); \
- mtspr CRIT_SPRG,r8; \
+ mtspr SPRN_SPRG_WSCRATCH_CRIT,r8; \
BOOKE_LOAD_EXC_LEVEL_STACK(CRIT); /* r8 points to the debug stack */ \
lwz r10,GPR10(r8); \
lwz r11,GPR11(r8); \
- mfspr r8,CRIT_SPRG; \
+ mfspr r8,SPRN_SPRG_RSCRATCH_CRIT; \
\
rfci; \
b .; \
addi r3,r1,STACK_FRAME_OVERHEAD; \
EXC_XFER_TEMPLATE(DebugException, 0x2002, (MSR_KERNEL & ~(MSR_ME|MSR_DE|MSR_CE)), NOCOPY, crit_transfer_to_handler, ret_from_crit_exc)
+#define DATA_STORAGE_EXCEPTION \
+ START_EXCEPTION(DataStorage) \
+ NORMAL_EXCEPTION_PROLOG; \
+ mfspr r5,SPRN_ESR; /* Grab the ESR and save it */ \
+ stw r5,_ESR(r11); \
+ mfspr r4,SPRN_DEAR; /* Grab the DEAR */ \
+ EXC_XFER_EE_LITE(0x0300, handle_page_fault)
+
#define INSTRUCTION_STORAGE_EXCEPTION \
START_EXCEPTION(InstructionStorage) \
NORMAL_EXCEPTION_PROLOG; \
#define FP_UNAVAILABLE_EXCEPTION \
START_EXCEPTION(FloatingPointUnavailable) \
NORMAL_EXCEPTION_PROLOG; \
- bne load_up_fpu; /* if from user, just load it up */ \
- addi r3,r1,STACK_FRAME_OVERHEAD; \
+ beq 1f; \
+ bl load_up_fpu; /* if from user, just load it up */ \
+ b fast_exception_return; \
+1: addi r3,r1,STACK_FRAME_OVERHEAD; \
EXC_XFER_EE_LITE(0x800, kernel_fp_unavailable_exception)
+#ifndef __ASSEMBLY__
+struct exception_regs {
+ unsigned long mas0;
+ unsigned long mas1;
+ unsigned long mas2;
+ unsigned long mas3;
+ unsigned long mas6;
+ unsigned long mas7;
+ unsigned long srr0;
+ unsigned long srr1;
+ unsigned long csrr0;
+ unsigned long csrr1;
+ unsigned long dsrr0;
+ unsigned long dsrr1;
+ unsigned long saved_ksp_limit;
+};
+
+/* ensure this structure is always sized to a multiple of the stack alignment */
+#define STACK_EXC_LVL_FRAME_SIZE _ALIGN_UP(sizeof (struct exception_regs), 16)
+
+#endif /* __ASSEMBLY__ */
#endif /* __HEAD_BOOKE_H__ */
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff