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| author | Jeremy Fitzhardinge <jeremy@goop.org> | 2008-01-30 15:32:43 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-01-30 15:32:43 +0300 |
| commit | 98fd5aee348f0420afd1c636790d50aaaec6ceec (patch) | |
| tree | c2e0e421ce7cfb809b643a6934e19f82e2c1ceae /include/asm-x86/page.h | |
| parent | 6724a1d2fc6b40d55f232b8dacc12a915878bdc7 (diff) | |
| download | linux-98fd5aee348f0420afd1c636790d50aaaec6ceec.tar.xz | |
x86: page.h: move pa and va related things
# HG changeset patch
# User Jeremy Fitzhardinge <jeremy@xensource.com>
# Date 1199319656 28800
# Node ID d617b72a0cc9d14bde2087d065c36d4ed3265761
# Parent 3bd7db6e85e66e7f3362874802df26a82fcb2d92
x86: page.h: move pa and va related things
Move and unify the virtual<->physical address space conversion
functions.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'include/asm-x86/page.h')
| -rw-r--r-- | include/asm-x86/page.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/include/asm-x86/page.h b/include/asm-x86/page.h index ef393c3df902..9830eeb57173 100644 --- a/include/asm-x86/page.h +++ b/include/asm-x86/page.h @@ -80,6 +80,9 @@ void clear_page(void *page); void copy_page(void *to, void *from); +extern unsigned long __phys_addr(unsigned long); +#define __phys_reloc_hide(x) (x) + /* * These are used to make use of C type-checking.. */ @@ -174,6 +177,13 @@ static inline pte_t native_make_pte(unsigned long val) #endif #ifndef __ASSEMBLY__ +#define __phys_addr(x) ((x)-PAGE_OFFSET) +#define __phys_reloc_hide(x) RELOC_HIDE((x), 0) + +#ifdef CONFIG_FLATMEM +#define pfn_valid(pfn) ((pfn) < max_mapnr) +#endif /* CONFIG_FLATMEM */ + #ifdef CONFIG_X86_USE_3DNOW #include <asm/mmx.h> @@ -299,6 +309,20 @@ static inline pmdval_t native_pmd_val(pmd_t pmd) #endif /* CONFIG_PARAVIRT */ +#define __pa(x) __phys_addr((unsigned long)(x)) +/* __pa_symbol should be used for C visible symbols. + This seems to be the official gcc blessed way to do such arithmetic. */ +#define __pa_symbol(x) __pa(__phys_reloc_hide((unsigned long)(x))) + +#define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET)) + +#define __boot_va(x) __va(x) +#define __boot_pa(x) __pa(x) + +#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) +#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) +#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) + #endif /* __ASSEMBLY__ */ |