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-rw-r--r--arch/powerpc/kernel/head_booke.h50
1 files changed, 20 insertions, 30 deletions
diff --git a/arch/powerpc/kernel/head_booke.h b/arch/powerpc/kernel/head_booke.h
index 5f9febc8d143..50504ae39cb7 100644
--- a/arch/powerpc/kernel/head_booke.h
+++ b/arch/powerpc/kernel/head_booke.h
@@ -20,14 +20,14 @@
20#endif 20#endif
21 21
22#define NORMAL_EXCEPTION_PROLOG \ 22#define NORMAL_EXCEPTION_PROLOG \
23 mtspr SPRN_SPRG0,r10; /* save two registers to work with */\ 23 mtspr SPRN_SPRG_WSCRATCH0,r10;/* save two registers to work with */\
24 mtspr SPRN_SPRG1,r11; \ 24 mtspr SPRN_SPRG_WSCRATCH1,r11; \
25 mtspr SPRN_SPRG4W,r1; \ 25 mtspr SPRN_SPRG_WSCRATCH2,r1; \
26 mfcr r10; /* save CR in r10 for now */\ 26 mfcr r10; /* save CR in r10 for now */\
27 mfspr r11,SPRN_SRR1; /* check whether user or kernel */\ 27 mfspr r11,SPRN_SRR1; /* check whether user or kernel */\
28 andi. r11,r11,MSR_PR; \ 28 andi. r11,r11,MSR_PR; \
29 beq 1f; \ 29 beq 1f; \
30 mfspr r1,SPRN_SPRG3; /* if from user, start at top of */\ 30 mfspr r1,SPRN_SPRG_THREAD; /* if from user, start at top of */\
31 lwz r1,THREAD_INFO-THREAD(r1); /* this thread's kernel stack */\ 31 lwz r1,THREAD_INFO-THREAD(r1); /* this thread's kernel stack */\
32 ALLOC_STACK_FRAME(r1, THREAD_SIZE); \ 32 ALLOC_STACK_FRAME(r1, THREAD_SIZE); \
331: subi r1,r1,INT_FRAME_SIZE; /* Allocate an exception frame */\ 331: subi r1,r1,INT_FRAME_SIZE; /* Allocate an exception frame */\
@@ -35,13 +35,13 @@
35 stw r10,_CCR(r11); /* save various registers */\ 35 stw r10,_CCR(r11); /* save various registers */\
36 stw r12,GPR12(r11); \ 36 stw r12,GPR12(r11); \
37 stw r9,GPR9(r11); \ 37 stw r9,GPR9(r11); \
38 mfspr r10,SPRN_SPRG0; \ 38 mfspr r10,SPRN_SPRG_RSCRATCH0; \
39 stw r10,GPR10(r11); \ 39 stw r10,GPR10(r11); \
40 mfspr r12,SPRN_SPRG1; \ 40 mfspr r12,SPRN_SPRG_RSCRATCH1; \
41 stw r12,GPR11(r11); \ 41 stw r12,GPR11(r11); \
42 mflr r10; \ 42 mflr r10; \
43 stw r10,_LINK(r11); \ 43 stw r10,_LINK(r11); \
44 mfspr r10,SPRN_SPRG4R; \ 44 mfspr r10,SPRN_SPRG_RSCRATCH2; \
45 mfspr r12,SPRN_SRR0; \ 45 mfspr r12,SPRN_SRR0; \
46 stw r10,GPR1(r11); \ 46 stw r10,GPR1(r11); \
47 mfspr r9,SPRN_SRR1; \ 47 mfspr r9,SPRN_SRR1; \
@@ -69,21 +69,11 @@
69 * providing configurations that micro-optimize space usage. 69 * providing configurations that micro-optimize space usage.
70 */ 70 */
71 71
72/* CRIT_SPRG only used in critical exception handling */ 72#define MC_STACK_BASE mcheckirq_ctx
73#define CRIT_SPRG SPRN_SPRG2
74/* MCHECK_SPRG only used in machine check exception handling */
75#define MCHECK_SPRG SPRN_SPRG6W
76
77#define MCHECK_STACK_BASE mcheckirq_ctx
78#define CRIT_STACK_BASE critirq_ctx 73#define CRIT_STACK_BASE critirq_ctx
79 74
80/* only on e500mc/e200 */ 75/* only on e500mc/e200 */
81#define DEBUG_STACK_BASE dbgirq_ctx 76#define DBG_STACK_BASE dbgirq_ctx
82#ifdef CONFIG_E200
83#define DEBUG_SPRG SPRN_SPRG6W
84#else
85#define DEBUG_SPRG SPRN_SPRG9
86#endif
87 77
88#define EXC_LVL_FRAME_OVERHEAD (THREAD_SIZE - INT_FRAME_SIZE - EXC_LVL_SIZE) 78#define EXC_LVL_FRAME_OVERHEAD (THREAD_SIZE - INT_FRAME_SIZE - EXC_LVL_SIZE)
89 79
@@ -110,7 +100,7 @@
110 * critical/machine check exception stack at low physical addresses. 100 * critical/machine check exception stack at low physical addresses.
111 */ 101 */
112#define EXC_LEVEL_EXCEPTION_PROLOG(exc_level, exc_level_srr0, exc_level_srr1) \ 102#define EXC_LEVEL_EXCEPTION_PROLOG(exc_level, exc_level_srr0, exc_level_srr1) \
113 mtspr exc_level##_SPRG,r8; \ 103 mtspr SPRN_SPRG_WSCRATCH_##exc_level,r8; \
114 BOOKE_LOAD_EXC_LEVEL_STACK(exc_level);/* r8 points to the exc_level stack*/ \ 104 BOOKE_LOAD_EXC_LEVEL_STACK(exc_level);/* r8 points to the exc_level stack*/ \
115 stw r9,GPR9(r8); /* save various registers */\ 105 stw r9,GPR9(r8); /* save various registers */\
116 mfcr r9; /* save CR in r9 for now */\ 106 mfcr r9; /* save CR in r9 for now */\
@@ -119,7 +109,7 @@
119 stw r9,_CCR(r8); /* save CR on stack */\ 109 stw r9,_CCR(r8); /* save CR on stack */\
120 mfspr r10,exc_level_srr1; /* check whether user or kernel */\ 110 mfspr r10,exc_level_srr1; /* check whether user or kernel */\
121 andi. r10,r10,MSR_PR; \ 111 andi. r10,r10,MSR_PR; \
122 mfspr r11,SPRN_SPRG3; /* if from user, start at top of */\ 112 mfspr r11,SPRN_SPRG_THREAD; /* if from user, start at top of */\
123 lwz r11,THREAD_INFO-THREAD(r11); /* this thread's kernel stack */\ 113 lwz r11,THREAD_INFO-THREAD(r11); /* this thread's kernel stack */\
124 addi r11,r11,EXC_LVL_FRAME_OVERHEAD; /* allocate stack frame */\ 114 addi r11,r11,EXC_LVL_FRAME_OVERHEAD; /* allocate stack frame */\
125 beq 1f; \ 115 beq 1f; \
@@ -140,7 +130,7 @@
140 lwz r9,TI_TASK-EXC_LVL_FRAME_OVERHEAD(r11); \ 130 lwz r9,TI_TASK-EXC_LVL_FRAME_OVERHEAD(r11); \
141 stw r9,TI_TASK-EXC_LVL_FRAME_OVERHEAD(r8); \ 131 stw r9,TI_TASK-EXC_LVL_FRAME_OVERHEAD(r8); \
142 mr r11,r8; \ 132 mr r11,r8; \
1432: mfspr r8,exc_level##_SPRG; \ 1332: mfspr r8,SPRN_SPRG_RSCRATCH_##exc_level; \
144 stw r12,GPR12(r11); /* save various registers */\ 134 stw r12,GPR12(r11); /* save various registers */\
145 mflr r10; \ 135 mflr r10; \
146 stw r10,_LINK(r11); \ 136 stw r10,_LINK(r11); \
@@ -161,9 +151,9 @@
161#define CRITICAL_EXCEPTION_PROLOG \ 151#define CRITICAL_EXCEPTION_PROLOG \
162 EXC_LEVEL_EXCEPTION_PROLOG(CRIT, SPRN_CSRR0, SPRN_CSRR1) 152 EXC_LEVEL_EXCEPTION_PROLOG(CRIT, SPRN_CSRR0, SPRN_CSRR1)
163#define DEBUG_EXCEPTION_PROLOG \ 153#define DEBUG_EXCEPTION_PROLOG \
164 EXC_LEVEL_EXCEPTION_PROLOG(DEBUG, SPRN_DSRR0, SPRN_DSRR1) 154 EXC_LEVEL_EXCEPTION_PROLOG(DBG, SPRN_DSRR0, SPRN_DSRR1)
165#define MCHECK_EXCEPTION_PROLOG \ 155#define MCHECK_EXCEPTION_PROLOG \
166 EXC_LEVEL_EXCEPTION_PROLOG(MCHECK, SPRN_MCSRR0, SPRN_MCSRR1) 156 EXC_LEVEL_EXCEPTION_PROLOG(MC, SPRN_MCSRR0, SPRN_MCSRR1)
167 157
168/* 158/*
169 * Exception vectors. 159 * Exception vectors.
@@ -282,13 +272,13 @@ label:
282 mtspr SPRN_DSRR1,r9; \ 272 mtspr SPRN_DSRR1,r9; \
283 lwz r9,GPR9(r11); \ 273 lwz r9,GPR9(r11); \
284 lwz r12,GPR12(r11); \ 274 lwz r12,GPR12(r11); \
285 mtspr DEBUG_SPRG,r8; \ 275 mtspr SPRN_SPRG_WSCRATCH_DBG,r8; \
286 BOOKE_LOAD_EXC_LEVEL_STACK(DEBUG); /* r8 points to the debug stack */ \ 276 BOOKE_LOAD_EXC_LEVEL_STACK(DBG); /* r8 points to the debug stack */ \
287 lwz r10,GPR10(r8); \ 277 lwz r10,GPR10(r8); \
288 lwz r11,GPR11(r8); \ 278 lwz r11,GPR11(r8); \
289 mfspr r8,DEBUG_SPRG; \ 279 mfspr r8,SPRN_SPRG_RSCRATCH_DBG; \
290 \ 280 \
291 PPC_RFDI; \ 281 PPC_RFDI; \
292 b .; \ 282 b .; \
293 \ 283 \
294 /* continue normal handling for a debug exception... */ \ 284 /* continue normal handling for a debug exception... */ \
@@ -335,11 +325,11 @@ label:
335 mtspr SPRN_CSRR1,r9; \ 325 mtspr SPRN_CSRR1,r9; \
336 lwz r9,GPR9(r11); \ 326 lwz r9,GPR9(r11); \
337 lwz r12,GPR12(r11); \ 327 lwz r12,GPR12(r11); \
338 mtspr CRIT_SPRG,r8; \ 328 mtspr SPRN_SPRG_WSCRATCH_CRIT,r8; \
339 BOOKE_LOAD_EXC_LEVEL_STACK(CRIT); /* r8 points to the debug stack */ \ 329 BOOKE_LOAD_EXC_LEVEL_STACK(CRIT); /* r8 points to the debug stack */ \
340 lwz r10,GPR10(r8); \ 330 lwz r10,GPR10(r8); \
341 lwz r11,GPR11(r8); \ 331 lwz r11,GPR11(r8); \
342 mfspr r8,CRIT_SPRG; \ 332 mfspr r8,SPRN_SPRG_RSCRATCH_CRIT; \
343 \ 333 \
344 rfci; \ 334 rfci; \
345 b .; \ 335 b .; \
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