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| author | Vineet Gupta <vgupta@synopsys.com> | 2013-06-17 14:33:15 +0530 |
|---|---|---|
| committer | Vineet Gupta <vgupta@synopsys.com> | 2013-06-27 14:37:57 +0530 |
| commit | dc81df244028e0d07c8723e3f7ebd1a35e848293 (patch) | |
| tree | 40aafc02150025631b15dc514469ff74318e71e6 /arch/arc/mm/tlbex.S | |
| parent | c3e757a77cab461d11cd3e365d700e8c8fb3fae0 (diff) | |
| download | linux-0-day-dc81df244028e0d07c8723e3f7ebd1a35e848293.tar.gz linux-0-day-dc81df244028e0d07c8723e3f7ebd1a35e848293.tar.xz | |
ARC: [tlb-miss] Fix bug with CONFIG_ARC_DBG_TLB_MISS_COUNT
LOAD_FAULT_PTE macro is expected to set r2 with faulting vaddr.
However in case of CONFIG_ARC_DBG_TLB_MISS_COUNT, it was getting
clobbered with statistics collection code.
Fix latter by using a different register.
Note that only I-TLB Miss handler was potentially affected.
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Diffstat (limited to 'arch/arc/mm/tlbex.S')
| -rw-r--r-- | arch/arc/mm/tlbex.S | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/arch/arc/mm/tlbex.S b/arch/arc/mm/tlbex.S index fcdc19ff6da77..5c5bb23001b07 100644 --- a/arch/arc/mm/tlbex.S +++ b/arch/arc/mm/tlbex.S @@ -147,9 +147,9 @@ ex_saved_reg1: #ifdef CONFIG_ARC_DBG_TLB_MISS_COUNT and.f 0, r0, _PAGE_PRESENT bz 1f - ld r2, [num_pte_not_present] - add r2, r2, 1 - st r2, [num_pte_not_present] + ld r3, [num_pte_not_present] + add r3, r3, 1 + st r3, [num_pte_not_present] 1: #endif @@ -271,7 +271,7 @@ ARC_ENTRY EV_TLBMissI #endif ;---------------------------------------------------------------- - ; Get the PTE corresponding to V-addr accessed + ; Get the PTE corresponding to V-addr accessed, r2 is setup with EFA LOAD_FAULT_PTE ;---------------------------------------------------------------- @@ -311,7 +311,7 @@ ARC_ENTRY EV_TLBMissD ;---------------------------------------------------------------- ; Get the PTE corresponding to V-addr accessed - ; If PTE exists, it will setup, r0 = PTE, r1 = Ptr to PTE + ; If PTE exists, it will setup, r0 = PTE, r1 = Ptr to PTE, r2 = EFA LOAD_FAULT_PTE ;---------------------------------------------------------------- |