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H. Peter Anvin1965aae2008-10-22 22:26:29 -07001#ifndef _ASM_X86_PAGE_H
2#define _ASM_X86_PAGE_H
Jeremy Fitzhardinge83a51012008-01-30 13:32:41 +01003
Ingo Molnar56cefce2009-02-13 13:23:02 +01004#include <linux/types.h>
5
Jeremy Fitzhardinge11b7c7d2008-01-30 13:32:44 +01006#ifdef __KERNEL__
7
Jeremy Fitzhardinge51c78eb2009-02-08 22:52:14 -08008#include <asm/page_types.h>
Jeremy Fitzhardinge83a51012008-01-30 13:32:41 +01009
10#ifdef CONFIG_X86_64
Jeremy Fitzhardinge11b7c7d2008-01-30 13:32:44 +010011#include <asm/page_64.h>
12#else
13#include <asm/page_32.h>
Jeremy Fitzhardinge83a51012008-01-30 13:32:41 +010014#endif /* CONFIG_X86_64 */
15
Jeremy Fitzhardinge345b9042008-01-30 13:32:42 +010016#ifndef __ASSEMBLY__
Thomas Gleixner5f5192b2008-01-30 13:34:06 +010017
Jeremy Fitzhardinge345b9042008-01-30 13:32:42 +010018struct page;
19
Chuck Leverf2f7abc2008-03-04 14:55:45 -080020static inline void clear_user_page(void *page, unsigned long vaddr,
Jeremy Fitzhardinge51c78eb2009-02-08 22:52:14 -080021 struct page *pg)
Jeremy Fitzhardinge345b9042008-01-30 13:32:42 +010022{
23 clear_page(page);
24}
25
Chuck Leverf2f7abc2008-03-04 14:55:45 -080026static inline void copy_user_page(void *to, void *from, unsigned long vaddr,
Jeremy Fitzhardinge51c78eb2009-02-08 22:52:14 -080027 struct page *topage)
Jeremy Fitzhardinge345b9042008-01-30 13:32:42 +010028{
29 copy_page(to, from);
30}
31
32#define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \
33 alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr)
34#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
35
Jeremy Fitzhardinge98fd5ae2008-01-30 13:32:43 +010036#define __pa(x) __phys_addr((unsigned long)(x))
Vegard Nossumaf5c2bd2008-10-03 17:54:25 +020037#define __pa_nodebug(x) __phys_addr_nodebug((unsigned long)(x))
Jeremy Fitzhardinge98fd5ae2008-01-30 13:32:43 +010038/* __pa_symbol should be used for C visible symbols.
39 This seems to be the official gcc blessed way to do such arithmetic. */
Namhyung Kim8fd49932010-08-11 15:37:41 +090040/*
41 * We need __phys_reloc_hide() here because gcc may assume that there is no
42 * overflow during __pa() calculation and can optimize it unexpectedly.
43 * Newer versions of gcc provide -fno-strict-overflow switch to handle this
44 * case properly. Once all supported versions of gcc understand it, we can
45 * remove this Voodoo magic stuff. (i.e. once gcc3.x is deprecated)
46 */
Jeremy Fitzhardinge98fd5ae2008-01-30 13:32:43 +010047#define __pa_symbol(x) __pa(__phys_reloc_hide((unsigned long)(x)))
48
49#define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
50
51#define __boot_va(x) __va(x)
52#define __boot_pa(x) __pa(x)
53
Vegard Nossumaf5c2bd2008-10-03 17:54:25 +020054/*
55 * virt_to_page(kaddr) returns a valid pointer if and only if
56 * virt_addr_valid(kaddr) returns true.
57 */
Jeremy Fitzhardinge98fd5ae2008-01-30 13:32:43 +010058#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
59#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
Vegard Nossumaf5c2bd2008-10-03 17:54:25 +020060extern bool __virt_addr_valid(unsigned long kaddr);
61#define virt_addr_valid(kaddr) __virt_addr_valid((unsigned long) (kaddr))
Jeremy Fitzhardinge98fd5ae2008-01-30 13:32:43 +010062
Jeremy Fitzhardinge345b9042008-01-30 13:32:42 +010063#endif /* __ASSEMBLY__ */
64
Jeremy Fitzhardingee62f4472008-01-30 13:32:44 +010065#include <asm-generic/memory_model.h>
Arnd Bergmann5b17e1c2009-05-13 22:56:30 +000066#include <asm-generic/getorder.h>
Jeremy Fitzhardingee62f4472008-01-30 13:32:44 +010067
68#define __HAVE_ARCH_GATE_AREA 1
Jeremy Fitzhardinge345b9042008-01-30 13:32:42 +010069
Jeremy Fitzhardinge11b7c7d2008-01-30 13:32:44 +010070#endif /* __KERNEL__ */
H. Peter Anvin1965aae2008-10-22 22:26:29 -070071#endif /* _ASM_X86_PAGE_H */