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| author | Catalin Marinas <catalin.marinas@arm.com> | 2013-11-29 14:56:14 +0400 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2013-11-29 19:05:07 +0400 |
| commit | 4f00130b70e5eee813cc7bc298e0f3fdf79673cc (patch) | |
| tree | ff4efdbf6eabe114e59c979949bbaa9324065c50 | |
| parent | 2dacab73dc9f86ad12eb41bc3355d7f492696bca (diff) | |
| download | linux-4f00130b70e5eee813cc7bc298e0f3fdf79673cc.tar.xz | |
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 <catalin.marinas@arm.com>
| -rw-r--r-- | arch/arm64/include/asm/pgtable.h | 2 |
1 files changed, 1 insertions, 1 deletions
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 |