diff options
Diffstat (limited to 'arch/powerpc/kernel/head_booke.h')
| -rw-r--r-- | arch/powerpc/kernel/head_booke.h | 29 |
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 @@ SAVE_2GPRS(7, r11) /* To handle the additional exception priority levels on 40x and Book-E - * processors we allocate a 4k stack per additional priority level. The various - * head_xxx.S files allocate space (exception_stack_top) for each priority's - * stack times the number of CPUs + * processors we allocate a stack per additional priority level. * * On 40x critical is the only additional level * On 44x/e500 we have critical and machine check @@ -61,36 +59,31 @@ * going to critical or their own debug level we aren't currently * providing configurations that micro-optimize space usage. */ -#ifdef CONFIG_44x -#define NUM_EXCEPTION_LVLS 2 -#else -#define NUM_EXCEPTION_LVLS 3 -#endif -#define BOOKE_EXCEPTION_STACK_SIZE (4096 * NUM_EXCEPTION_LVLS) /* 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_TOP (exception_stack_top - 4096) -#define CRIT_STACK_TOP (exception_stack_top) +#define MCHECK_STACK_BASE mcheckirq_ctx +#define CRIT_STACK_BASE critirq_ctx /* only on e200 for now */ -#define DEBUG_STACK_TOP (exception_stack_top - 8192) +#define DEBUG_STACK_BASE dbgirq_ctx #define DEBUG_SPRG SPRN_SPRG6W #ifdef CONFIG_SMP #define BOOKE_LOAD_EXC_LEVEL_STACK(level) \ mfspr r8,SPRN_PIR; \ - mulli r8,r8,BOOKE_EXCEPTION_STACK_SIZE; \ - neg r8,r8; \ - addis r8,r8,level##_STACK_TOP@ha; \ - addi r8,r8,level##_STACK_TOP@l + slwi r8,r8,2; \ + addis r8,r8,level##_STACK_BASE@ha; \ + lwz r8,level##_STACK_BASE@l(r8); \ + addi r8,r8,THREAD_SIZE; #else #define BOOKE_LOAD_EXC_LEVEL_STACK(level) \ - lis r8,level##_STACK_TOP@h; \ - ori r8,r8,level##_STACK_TOP@l + lis r8,level##_STACK_BASE@ha; \ + lwz r8,level##_STACK_BASE@l(r8); \ + addi r8,r8,THREAD_SIZE; #endif /* |