arm64: add support to remap kernel cacheable memory to userspace

Signed-off-by: Haiying Wang <Haiying.Wang@freescale.com>
Reviewed-by: Roy Pledge <roy.pledge@freescale.com>
Reviewed-by: Stuart Yoder <stuart.yoder@freescale.com>

diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h
index 5628289..c1da873 100644 (file)
--- a/arch/arm64/include/asm/pgtable.h
+++ b/arch/arm64/include/asm/pgtable.h
@@ -482,6 +482,9 @@ static inline pmd_t pmd_mkdevmap(pmd_t pmd)
        __pgprot_modify(prot, PTE_ATTRINDX_MASK, PTE_ATTRINDX(MT_DEVICE_nGnRnE) | PTE_PXN | PTE_UXN)
 #define pgprot_writecombine(prot) \
        __pgprot_modify(prot, PTE_ATTRINDX_MASK, PTE_ATTRINDX(MT_NORMAL_NC) | PTE_PXN | PTE_UXN)
+#define pgprot_cached(prot) \
+       __pgprot_modify(prot, PTE_ATTRINDX_MASK, PTE_ATTRINDX(MT_NORMAL) | \
+                       PTE_PXN | PTE_UXN)
 #define pgprot_device(prot) \
        __pgprot_modify(prot, PTE_ATTRINDX_MASK, PTE_ATTRINDX(MT_DEVICE_nGnRE) | PTE_PXN | PTE_UXN)
 /*