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| author | Michal Simek <monstr@monstr.eu> | 2010-03-22 20:37:23 +0100 |
|---|---|---|
| committer | Michal Simek <monstr@monstr.eu> | 2010-04-01 08:38:23 +0200 |
| commit | 7a6bbdc9304b45cc759e03623cbe63d81aff7337 (patch) | |
| tree | 42361021652ad0217317d5a7ee4e10f49832d839 /arch/microblaze/kernel | |
| parent | 708e7153d6fc4d2e5fe15c6ccc5d2907fe8a9c8d (diff) | |
| download | op-kernel-dev-7a6bbdc9304b45cc759e03623cbe63d81aff7337.zip op-kernel-dev-7a6bbdc9304b45cc759e03623cbe63d81aff7337.tar.gz | |
microblaze: Prepare work for optimization in exception code
Any sync branch must follow mts instructions not mfs.
Signed-off-by: Michal Simek <monstr@monstr.eu>
Diffstat (limited to 'arch/microblaze/kernel')
| -rw-r--r-- | arch/microblaze/kernel/hw_exception_handler.S | 9 |
1 files changed, 3 insertions, 6 deletions
diff --git a/arch/microblaze/kernel/hw_exception_handler.S b/arch/microblaze/kernel/hw_exception_handler.S index 6651bb4..ad6dbf0 100644 --- a/arch/microblaze/kernel/hw_exception_handler.S +++ b/arch/microblaze/kernel/hw_exception_handler.S @@ -562,7 +562,6 @@ ex_handler_done: */ mfs r11, rpid nop - bri 4 mfs r3, rear /* Get faulting address */ nop /* If we are faulting a kernel address, we have to use the @@ -679,18 +678,17 @@ ex_handler_done: */ handle_data_tlb_miss_exception: /* Working registers already saved: R3, R4, R5, R6 - * R3 = ESR + * R3 = EAR, R4 = ESR */ mfs r11, rpid nop - bri 4 mfs r3, rear /* Get faulting address */ nop /* If we are faulting a kernel address, we have to use the * kernel page tables. */ - ori r4, r0, CONFIG_KERNEL_START - cmpu r4, r3, r4 + ori r6, r0, CONFIG_KERNEL_START + cmpu r4, r3, r6 bgti r4, ex5 ori r4, r0, swapper_pg_dir mts rpid, r0 /* TLB will have 0 TID */ @@ -756,7 +754,6 @@ ex_handler_done: */ mfs r11, rpid nop - bri 4 mfs r3, rear /* Get faulting address */ nop |
