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microblaze: Move SAVE_STATE upward 

SAVE_STATE macro could be used by other rutines too.

Signed-off-by: Michal Simek <monstr@monstr.eu>
This commit is contained in:
Michal Simek 2010-06-22 17:58:26 +02:00
parent 66f7de8634
commit e5d2af2b96
1 changed files with 31 additions and 32 deletions
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63
arch/microblaze/kernel/entry.S
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@ -269,6 +269,37 @@
lwi r30, r1, PTO+PT_R30; \
lwi r31, r1, PTO+PT_R31; /* Restore cur task reg */
#define SAVE_STATE \
swi r1, r0, TOPHYS(PER_CPU(ENTRY_SP)); /* save stack */ \
/* See if already in kernel mode.*/ \
mfs r1, rmsr; \
nop; \
andi r1, r1, MSR_UMS; \
bnei r1, 1f; \
/* Kernel-mode state save. */ \
/* Reload kernel stack-ptr. */ \
lwi r1, r0, TOPHYS(PER_CPU(ENTRY_SP)); \
tophys(r1,r1); \
addik r1, r1, -STATE_SAVE_SIZE; /* Make room on the stack. */\
SAVE_REGS \
swi r1, r1, PTO+PT_MODE; \
brid 2f; \
nop; /* Fill delay slot */ \
1: /* User-mode state save. */ \
lwi r1, r0, TOPHYS(PER_CPU(CURRENT_SAVE)); /* get saved current */\
tophys(r1,r1); \
lwi r1, r1, TS_THREAD_INFO; /* get the thread info */ \
addik r1, r1, THREAD_SIZE; /* calculate kernel stack pointer */\
tophys(r1,r1); \
addik r1, r1, -STATE_SAVE_SIZE; /* Make room on the stack. */\
SAVE_REGS \
swi r0, r1, PTO + PT_MODE; /* Was in user-mode. */ \
lwi r11, r0, TOPHYS(PER_CPU(ENTRY_SP)); \
swi r11, r1, PTO+PT_R1; /* Store user SP. */ \
/* MS: I am clearing UMS even in case when I come from kernel space */ \
clear_ums; \
2: lwi CURRENT_TASK, r0, TOPHYS(PER_CPU(CURRENT_SAVE));
.text
/*
@ -511,38 +542,6 @@ C_ENTRY(sys_rt_sigreturn_wrapper):
/*
* HW EXCEPTION rutine start
*/
#define SAVE_STATE \
swi r1, r0, TOPHYS(PER_CPU(ENTRY_SP)); /* save stack */ \
/* See if already in kernel mode.*/ \
mfs r1, rmsr; \
nop; \
andi r1, r1, MSR_UMS; \
bnei r1, 1f; \
/* Kernel-mode state save. */ \
/* Reload kernel stack-ptr. */ \
lwi r1, r0, TOPHYS(PER_CPU(ENTRY_SP)); \
tophys(r1,r1); \
addik r1, r1, -STATE_SAVE_SIZE; /* Make room on the stack. */\
SAVE_REGS \
swi r1, r1, PTO+PT_MODE; \
brid 2f; \
nop; /* Fill delay slot */ \
1: /* User-mode state save. */ \
lwi r1, r0, TOPHYS(PER_CPU(CURRENT_SAVE)); /* get saved current */\
tophys(r1,r1); \
lwi r1, r1, TS_THREAD_INFO; /* get the thread info */ \
addik r1, r1, THREAD_SIZE; /* calculate kernel stack pointer */\
tophys(r1,r1); \
addik r1, r1, -STATE_SAVE_SIZE; /* Make room on the stack. */\
SAVE_REGS \
swi r0, r1, PTO + PT_MODE; /* Was in user-mode. */ \
lwi r11, r0, TOPHYS(PER_CPU(ENTRY_SP)); \
swi r11, r1, PTO+PT_R1; /* Store user SP. */ \
/* MS: I am clearing UMS even in case when I come from kernel space */ \
clear_ums; \
2: lwi CURRENT_TASK, r0, TOPHYS(PER_CPU(CURRENT_SAVE));
C_ENTRY(full_exception_trap):
/* adjust exception address for privileged instruction
* for finding where is it */