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| author | Michal Simek <monstr@monstr.eu> | 2010-06-22 16:22:01 +0200 |
|---|---|---|
| committer | Michal Simek <monstr@monstr.eu> | 2010-08-04 10:22:52 +0200 |
| commit | 06a54604a31f06715a393a4fdd099b03611cce10 (patch) | |
| tree | a7428fe0382c3e0b25dfd7e0395c5db9392171ec /arch/microblaze/kernel/entry.S | |
| parent | microblaze: Remove additional loading (diff) | |
| download | linux-06a54604a31f06715a393a4fdd099b03611cce10.tar.xz linux-06a54604a31f06715a393a4fdd099b03611cce10.zip | |
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.S | 21 |
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 */ |