Messages in this thread Patch in this message | | | From | yalin wang <> | Subject | [PATCH V2] arm64: add kc_offset_to_vaddr and kc_vaddr_to_offset macro | Date | Sun, 6 Sep 2015 12:04:10 +0800 |
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This patch add kc_offset_to_vaddr() and kc_vaddr_to_offset(), the default version doesn't work on arm64, because arm64 kernel address is below the PAGE_OFFSET, like module address and vmemmap address are all below PAGE_OFFSET address.
Signed-off-by: yalin wang <yalin.wang2010@gmail.com> --- arch/arm64/include/asm/memory.h | 1 + arch/arm64/include/asm/pgtable.h | 2 ++ 2 files changed, 3 insertions(+)
diff --git a/arch/arm64/include/asm/memory.h b/arch/arm64/include/asm/memory.h index f800d45..2d09fe8 100644 --- a/arch/arm64/include/asm/memory.h +++ b/arch/arm64/include/asm/memory.h @@ -55,6 +55,7 @@ #define PCI_IO_START (PCI_IO_END - PCI_IO_SIZE) #define FIXADDR_TOP (PCI_IO_START - SZ_2M) #define TASK_SIZE_64 (UL(1) << VA_BITS) +#define __VIRTUAL_MASK ((1UL << VA_BITS) - 1) #ifdef CONFIG_COMPAT #define TASK_SIZE_32 UL(0x100000000) diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h index d374191..9da6681 100644 --- a/arch/arm64/include/asm/pgtable.h +++ b/arch/arm64/include/asm/pgtable.h @@ -660,6 +660,8 @@ static inline void update_mmu_cache(struct vm_area_struct *vma, #define update_mmu_cache_pmd(vma, address, pmd) do { } while (0) +#define kc_vaddr_to_offset(v) ((v) & __VIRTUAL_MASK) +#define kc_offset_to_vaddr(o) ((o) | ~__VIRTUAL_MASK) #endif /* !__ASSEMBLY__ */ #endif /* __ASM_PGTABLE_H */ -- 1.9.1
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