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-rw-r--r--arch/powerpc/kernel/head_booke.h29
1 files changed, 11 insertions, 18 deletions
diff --git a/arch/powerpc/kernel/head_booke.h b/arch/powerpc/kernel/head_booke.h
index 721faef87095..9eacf4ca442a 100644
--- a/arch/powerpc/kernel/head_booke.h
+++ b/arch/powerpc/kernel/head_booke.h
@@ -43,9 +43,7 @@
43 SAVE_2GPRS(7, r11) 43 SAVE_2GPRS(7, r11)
44 44
45/* To handle the additional exception priority levels on 40x and Book-E 45/* To handle the additional exception priority levels on 40x and Book-E
46 * processors we allocate a 4k stack per additional priority level. The various 46 * processors we allocate a stack per additional priority level.
47 * head_xxx.S files allocate space (exception_stack_top) for each priority's
48 * stack times the number of CPUs
49 * 47 *
50 * On 40x critical is the only additional level 48 * On 40x critical is the only additional level
51 * On 44x/e500 we have critical and machine check 49 * On 44x/e500 we have critical and machine check
@@ -61,36 +59,31 @@
61 * going to critical or their own debug level we aren't currently 59 * going to critical or their own debug level we aren't currently
62 * providing configurations that micro-optimize space usage. 60 * providing configurations that micro-optimize space usage.
63 */ 61 */
64#ifdef CONFIG_44x
65#define NUM_EXCEPTION_LVLS 2
66#else
67#define NUM_EXCEPTION_LVLS 3
68#endif
69#define BOOKE_EXCEPTION_STACK_SIZE (4096 * NUM_EXCEPTION_LVLS)
70 62
71/* CRIT_SPRG only used in critical exception handling */ 63/* CRIT_SPRG only used in critical exception handling */
72#define CRIT_SPRG SPRN_SPRG2 64#define CRIT_SPRG SPRN_SPRG2
73/* MCHECK_SPRG only used in machine check exception handling */ 65/* MCHECK_SPRG only used in machine check exception handling */
74#define MCHECK_SPRG SPRN_SPRG6W 66#define MCHECK_SPRG SPRN_SPRG6W
75 67
76#define MCHECK_STACK_TOP (exception_stack_top - 4096) 68#define MCHECK_STACK_BASE mcheckirq_ctx
77#define CRIT_STACK_TOP (exception_stack_top) 69#define CRIT_STACK_BASE critirq_ctx
78 70
79/* only on e200 for now */ 71/* only on e200 for now */
80#define DEBUG_STACK_TOP (exception_stack_top - 8192) 72#define DEBUG_STACK_BASE dbgirq_ctx
81#define DEBUG_SPRG SPRN_SPRG6W 73#define DEBUG_SPRG SPRN_SPRG6W
82 74
83#ifdef CONFIG_SMP 75#ifdef CONFIG_SMP
84#define BOOKE_LOAD_EXC_LEVEL_STACK(level) \ 76#define BOOKE_LOAD_EXC_LEVEL_STACK(level) \
85 mfspr r8,SPRN_PIR; \ 77 mfspr r8,SPRN_PIR; \
86 mulli r8,r8,BOOKE_EXCEPTION_STACK_SIZE; \ 78 slwi r8,r8,2; \
87 neg r8,r8; \ 79 addis r8,r8,level##_STACK_BASE@ha; \
88 addis r8,r8,level##_STACK_TOP@ha; \ 80 lwz r8,level##_STACK_BASE@l(r8); \
89 addi r8,r8,level##_STACK_TOP@l 81 addi r8,r8,THREAD_SIZE;
90#else 82#else
91#define BOOKE_LOAD_EXC_LEVEL_STACK(level) \ 83#define BOOKE_LOAD_EXC_LEVEL_STACK(level) \
92 lis r8,level##_STACK_TOP@h; \ 84 lis r8,level##_STACK_BASE@ha; \
93 ori r8,r8,level##_STACK_TOP@l 85 lwz r8,level##_STACK_BASE@l(r8); \
86 addi r8,r8,THREAD_SIZE;
94#endif 87#endif
95 88
96/* 89/*