ARC: mm: tlb flush optim: Make TLBWriteNI fallback to TLBWrite if not available (ad4c40e9) · Commits · 戴 / test

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>

arch/arc/include/asm/mmu.h

+2 −0

Original line number	Diff line number	Diff line
		@@ -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)

arch/arc/mm/tlbex.S

+0 −4

Original line number	Diff line number	Diff line
		@@ -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]

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