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| author | Michal Simek <monstr@monstr.eu> | 2010-06-22 12:05:43 (GMT) |
|---|---|---|
| committer | Michal Simek <monstr@monstr.eu> | 2010-08-04 08:22:45 (GMT) |
| commit | 96014cc39bffe04429bcd143aa7bbde81f659ee4 (patch) | |
| tree | 4e665aa0455408f7a3fe7e925ca8597fe4ac8cc9 /arch/microblaze | |
| parent | 5c0d72b1b35fd0dad7dd70a114df068eadcc1b16 (diff) | |
| download | linux-96014cc39bffe04429bcd143aa7bbde81f659ee4.tar.xz | |
microblaze: Move BIP setup to the end of ret_from_trap/ret_from_exc
We don't need to protect by BIP whole ret_from_trap/ret_from_exc code.
Only restoring from user/hw exception should be covered.
If BIP is setup, IRQ can't occur.
Signed-off-by: Michal Simek <monstr@monstr.eu>
Diffstat (limited to 'arch/microblaze')
| -rw-r--r-- | arch/microblaze/kernel/entry.S | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/arch/microblaze/kernel/entry.S b/arch/microblaze/kernel/entry.S index 9a98f70..4a6cb1d 100644 --- a/arch/microblaze/kernel/entry.S +++ b/arch/microblaze/kernel/entry.S @@ -381,7 +381,6 @@ C_ENTRY(_user_exception): /* Entry point used to return from a syscall/trap */ /* We re-enable BIP bit before state restore */ C_ENTRY(ret_from_trap): - set_bip; /* Ints masked for state restore*/ swi r3, r1, PTO + PT_R3 swi r4, r1, PTO + PT_R4 @@ -423,7 +422,7 @@ C_ENTRY(ret_from_trap): add r6, r0, r0; /* Arg 2: sigset_t *oldset */ /* Finally, return to user state. */ -1: +1: set_bip; /* Ints masked for state restore */ swi CURRENT_TASK, r0, PER_CPU(CURRENT_SAVE); /* save current */ VM_OFF; tophys(r1,r1); @@ -433,7 +432,8 @@ C_ENTRY(ret_from_trap): bri 6f; /* Return to kernel state. */ -2: VM_OFF; +2: set_bip; /* Ints masked for state restore */ + VM_OFF; tophys(r1,r1); RESTORE_REGS; addik r1, r1, STATE_SAVE_SIZE /* Clean up stack space. */ @@ -647,7 +647,6 @@ C_ENTRY(page_fault_instr_trap): /* Entry point used to return from an exception. */ C_ENTRY(ret_from_exc): - set_bip; /* Ints masked for state restore*/ lwi r11, r1, PTO+PT_MODE; bnei r11, 2f; /* See if returning to kernel mode, */ /* ... if so, skip resched &c. */ @@ -686,7 +685,7 @@ C_ENTRY(ret_from_exc): add r6, r0, r0; /* Arg 2: sigset_t *oldset */ /* Finally, return to user state. */ -1: +1: set_bip; /* Ints masked for state restore */ swi CURRENT_TASK, r0, PER_CPU(CURRENT_SAVE); /* save current */ VM_OFF; tophys(r1,r1); @@ -697,7 +696,8 @@ C_ENTRY(ret_from_exc): lwi r1, r1, PT_R1 - PT_SIZE; /* Restore user stack pointer. */ bri 6f; /* Return to kernel state. */ -2: VM_OFF; +2: set_bip; /* Ints masked for state restore */ + VM_OFF; tophys(r1,r1); RESTORE_REGS; addik r1, r1, STATE_SAVE_SIZE /* Clean up stack space. */ |