1 #ifndef _ASM_X86_PAGE_H
2 #define _ASM_X86_PAGE_H
3
4 #include <linux/types.h>
5
6 #ifdef __KERNEL__
7
8 #include <asm/page_types.h>
9
10 #ifdef CONFIG_X86_64
11 #include <asm/page_64.h>
12 #else
13 #include <asm/page_32.h>
14 #endif /* CONFIG_X86_64 */
15
16 #ifndef __ASSEMBLY__
17
18 struct page;
19
20 static inline void clear_user_page(void *page, unsigned long vaddr,
21 struct page *pg)
22 {
23 clear_page(page);
24 }
25
26 static inline void copy_user_page(void *to, void *from, unsigned long vaddr,
27 struct page *topage)
28 {
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
36 #define __pa(x) __phys_addr((unsigned long)(x))
37 #define __pa_nodebug(x) __phys_addr_nodebug((unsigned long)(x))
38 /* __pa_symbol should be used for C visible symbols.
39 This seems to be the official gcc blessed way to do such arithmetic. */
40 #define __pa_symbol(x) __pa(__phys_reloc_hide((unsigned long)(x)))
41
42 #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
43
44 #define __boot_va(x) __va(x)
45 #define __boot_pa(x) __pa(x)
46
47 /*
48 * virt_to_page(kaddr) returns a valid pointer if and only if
49 * virt_addr_valid(kaddr) returns true.
50 */
51 #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
52 #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
53 extern bool __virt_addr_valid(unsigned long kaddr);
54 #define virt_addr_valid(kaddr) __virt_addr_valid((unsigned long) (kaddr))
55
56 #endif /* __ASSEMBLY__ */
57
58 #include <asm-generic/memory_model.h>
59 #include <asm-generic/getorder.h>
60
61 #define __HAVE_ARCH_GATE_AREA 1
62
63 #endif /* __KERNEL__ */
64 #endif /* _ASM_X86_PAGE_H */
65
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