From 4f00130b70e5eee813cc7bc298e0f3fdf79673cc Mon Sep 17 00:00:00 2001 From: Catalin Marinas Date: Fri, 29 Nov 2013 10:56:14 +0000 Subject: [PATCH] arm64: Use Normal NonCacheable memory for writecombine This provides better performance compared to Device GRE and also allows unaligned accesses. Such memory is intended to be used with standard RAM (e.g. framebuffers) and not I/O. Signed-off-by: Catalin Marinas --- arch/arm64/include/asm/pgtable.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h index 17bd3af0a117..5347b39fdb35 100644 --- a/arch/arm64/include/asm/pgtable.h +++ b/arch/arm64/include/asm/pgtable.h @@ -254,7 +254,7 @@ static inline int has_transparent_hugepage(void) #define pgprot_noncached(prot) \ __pgprot_modify(prot, PTE_ATTRINDX_MASK, PTE_ATTRINDX(MT_DEVICE_nGnRnE)) #define pgprot_writecombine(prot) \ - __pgprot_modify(prot, PTE_ATTRINDX_MASK, PTE_ATTRINDX(MT_DEVICE_GRE)) + __pgprot_modify(prot, PTE_ATTRINDX_MASK, PTE_ATTRINDX(MT_NORMAL_NC)) #define pgprot_dmacoherent(prot) \ __pgprot_modify(prot, PTE_ATTRINDX_MASK, PTE_ATTRINDX(MT_NORMAL_NC)) #define __HAVE_PHYS_MEM_ACCESS_PROT -- 2.20.1