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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>
This commit is contained in:
Vineet Gupta 2015-11-17 10:10:29 +05:30
parent f4e2f7cc69
commit ad4c40e937
2 changed files with 2 additions and 4 deletions
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2
arch/arc/include/asm/mmu.h
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@ -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)

4
arch/arc/mm/tlbex.S
View File

@ -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]