lkml.org 
[lkml]   [2015]   [Sep]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH V2] arm64: add kc_offset_to_vaddr and kc_vaddr_to_offset macro
Date
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


\
 
 \ /
  Last update: 2015-09-06 06:21    [W:0.588 / U:0.012 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site