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authorMichal Simek <monstr@monstr.eu>2010-06-22 16:22:01 +0200
committerMichal Simek <monstr@monstr.eu>2010-08-04 10:22:52 +0200
commit06a54604a31f06715a393a4fdd099b03611cce10 (patch)
treea7428fe0382c3e0b25dfd7e0395c5db9392171ec /arch/microblaze/kernel/entry.S
parent40eb0dc456dc3dd3f01da94e1f36085e956f20cc (diff)
microblaze: Optimize SAVE_STATE macro
SAVE_STATE macro could be used for user_exception or interrupt functions. Signed-off-by: Michal Simek <monstr@monstr.eu>
Diffstat (limited to 'arch/microblaze/kernel/entry.S')
-rw-r--r--arch/microblaze/kernel/entry.S21
1 files changed, 13 insertions, 8 deletions
diff --git a/arch/microblaze/kernel/entry.S b/arch/microblaze/kernel/entry.S
index 8f4a45e34a9e..aa611cd35042 100644
--- a/arch/microblaze/kernel/entry.S
+++ b/arch/microblaze/kernel/entry.S
@@ -513,9 +513,6 @@ C_ENTRY(sys_rt_sigreturn_wrapper):
tophys(r1,r1); \
addik r1, r1, -STATE_SAVE_SIZE; /* Make room on the stack. */\
SAVE_REGS \
- /* PC, before IRQ/trap - this is one instruction above */ \
- swi r17, r1, PTO+PT_PC; \
- \
addi r11, r0, 1; /* Was in kernel-mode. */ \
swi r11, r1, PTO+PT_MODE; \
brid 2f; \
@@ -528,20 +525,19 @@ C_ENTRY(sys_rt_sigreturn_wrapper):
tophys(r1,r1); \
addik r1, r1, -STATE_SAVE_SIZE; /* Make room on the stack. */\
SAVE_REGS \
- /* PC, before IRQ/trap - this is one instruction above FIXME*/ \
- swi r17, r1, PTO+PT_PC; \
- \
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. */ \
-2: lwi CURRENT_TASK, r0, TOPHYS(PER_CPU(CURRENT_SAVE)); \
- tovirt(r1,r1)
+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 */
addik r17, r17, -4
SAVE_STATE /* Save registers */
+ /* PC, before IRQ/trap - this is one instruction above */
+ swi r17, r1, PTO+PT_PC;
+ tovirt(r1,r1)
/* FIXME this can be store directly in PT_ESR reg.
* I tested it but there is a fault */
/* where the trap should return need -8 to adjust for rtsd r15, 8 */
@@ -581,6 +577,9 @@ C_ENTRY(unaligned_data_trap):
set_ee;
lwi r11, r0, TOPHYS(PER_CPU(ENTRY_SP));
SAVE_STATE /* Save registers.*/
+ /* PC, before IRQ/trap - this is one instruction above */
+ swi r17, r1, PTO+PT_PC;
+ tovirt(r1,r1)
/* where the trap should return need -8 to adjust for rtsd r15, 8 */
addik r15, r0, ret_from_exc-8
mfs r3, resr /* ESR */
@@ -613,6 +612,9 @@ C_ENTRY(unaligned_data_trap):
/* data and intruction trap - which is choose is resolved int fault.c */
C_ENTRY(page_fault_data_trap):
SAVE_STATE /* Save registers.*/
+ /* PC, before IRQ/trap - this is one instruction above */
+ swi r17, r1, PTO+PT_PC;
+ tovirt(r1,r1)
/* where the trap should return need -8 to adjust for rtsd r15, 8 */
addik r15, r0, ret_from_exc-8
addik r5, r1, PTO /* parameter struct pt_regs * regs */
@@ -627,6 +629,9 @@ C_ENTRY(page_fault_data_trap):
C_ENTRY(page_fault_instr_trap):
SAVE_STATE /* Save registers.*/
+ /* PC, before IRQ/trap - this is one instruction above */
+ swi r17, r1, PTO+PT_PC;
+ tovirt(r1,r1)
/* where the trap should return need -8 to adjust for rtsd r15, 8 */
addik r15, r0, ret_from_exc-8
addik r5, r1, PTO /* parameter struct pt_regs * regs */