diff options
| author | Vineet Gupta <vgupta@synopsys.com> | 2015-11-17 05:40:29 +0100 |
|---|---|---|
| committer | Vineet Gupta <vgupta@synopsys.com> | 2019-10-28 20:12:32 +0100 |
| commit | ad4c40e937f6d6a08a579c4a78206039618426b7 (patch) | |
| tree | 6aa267dceb8b36bde0b36433539d0766305b210b /arch/arc | |
| parent | ARC: mm: TLB Miss optim: avoid re-reading ECR (diff) | |
| download | linux-ad4c40e937f6d6a08a579c4a78206039618426b7.tar.xz linux-ad4c40e937f6d6a08a579c4a78206039618426b7.zip | |
ARC: mm: tlb flush optim: Make TLBWriteNI fallback to TLBWrite if not available
TLBWriteNI was introduced in MMUv2 (to not invalidate uTLBs in Fast Path
TLB Refill Handler). To avoid #ifdef'ery make it fallback to TLBWrite availabel on all MMUs. This will also help with next change
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Diffstat (limited to 'arch/arc')
| -rw-r--r-- | arch/arc/include/asm/mmu.h | 2 | ||||
| -rw-r--r-- | arch/arc/mm/tlbex.S | 4 |
2 files changed, 2 insertions, 4 deletions
diff --git a/arch/arc/include/asm/mmu.h b/arch/arc/include/asm/mmu.h index 0abacb82a72b..26b731d32a2b 100644 --- a/arch/arc/include/asm/mmu.h +++ b/arch/arc/include/asm/mmu.h @@ -67,6 +67,8 @@ #if (CONFIG_ARC_MMU_VER >= 2) #define TLBWriteNI 0x5 /* write JTLB without inv uTLBs */ #define TLBIVUTLB 0x6 /* explicitly inv uTLBs */ +#else +#define TLBWriteNI TLBWrite /* Not present in hardware, fallback */ #endif #if (CONFIG_ARC_MMU_VER >= 4) diff --git a/arch/arc/mm/tlbex.S b/arch/arc/mm/tlbex.S index 4c88148d4cd1..2efaf6ca0c06 100644 --- a/arch/arc/mm/tlbex.S +++ b/arch/arc/mm/tlbex.S @@ -292,11 +292,7 @@ ex_saved_reg1: sr TLBGetIndex, [ARC_REG_TLBCOMMAND] /* Commit the Write */ -#if (CONFIG_ARC_MMU_VER >= 2) /* introduced in v2 */ sr TLBWriteNI, [ARC_REG_TLBCOMMAND] -#else - sr TLBWrite, [ARC_REG_TLBCOMMAND] -#endif #else sr TLBInsertEntry, [ARC_REG_TLBCOMMAND] |