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83a5101b JF |
1 | #ifndef _ASM_X86_PAGE_H |
2 | #define _ASM_X86_PAGE_H | |
3 | ||
4 | #include <linux/const.h> | |
5 | ||
6 | /* PAGE_SHIFT determines the page size */ | |
7 | #define PAGE_SHIFT 12 | |
8 | #define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT) | |
9 | #define PAGE_MASK (~(PAGE_SIZE-1)) | |
10 | ||
11b7c7dc JF |
11 | #ifdef __KERNEL__ |
12 | ||
83a5101b | 13 | #define PHYSICAL_PAGE_MASK (PAGE_MASK & __PHYSICAL_MASK) |
b7fff536 | 14 | #define PTE_MASK (_AT(long, PHYSICAL_PAGE_MASK)) |
83a5101b | 15 | |
31422c51 AK |
16 | #define PMD_PAGE_SIZE (_AC(1, UL) << PMD_SHIFT) |
17 | #define PMD_PAGE_MASK (~(PMD_PAGE_SIZE-1)) | |
83a5101b JF |
18 | |
19 | #define HPAGE_SHIFT PMD_SHIFT | |
20 | #define HPAGE_SIZE (_AC(1,UL) << HPAGE_SHIFT) | |
21 | #define HPAGE_MASK (~(HPAGE_SIZE - 1)) | |
22 | #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) | |
23 | ||
24 | /* to align the pointer to the (next) page boundary */ | |
25 | #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK) | |
26 | ||
6724a1d2 | 27 | #define __PHYSICAL_MASK _AT(phys_addr_t, (_AC(1,ULL) << __PHYSICAL_MASK_SHIFT) - 1) |
83a5101b JF |
28 | #define __VIRTUAL_MASK ((_AC(1,UL) << __VIRTUAL_MASK_SHIFT) - 1) |
29 | ||
3da1bcc2 IM |
30 | #ifndef __ASSEMBLY__ |
31 | #include <linux/types.h> | |
32 | #endif | |
83a5101b JF |
33 | |
34 | #ifdef CONFIG_X86_64 | |
11b7c7dc JF |
35 | #include <asm/page_64.h> |
36 | #else | |
37 | #include <asm/page_32.h> | |
83a5101b JF |
38 | #endif /* CONFIG_X86_64 */ |
39 | ||
83a5101b JF |
40 | #define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET) |
41 | ||
42 | #define VM_DATA_DEFAULT_FLAGS \ | |
43 | (((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \ | |
44 | VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) | |
45 | ||
46 | ||
345b904c | 47 | #ifndef __ASSEMBLY__ |
5f5192b9 TG |
48 | |
49 | extern int page_is_ram(unsigned long pagenr); | |
ae531c26 | 50 | extern int devmem_is_allowed(unsigned long pagenr); |
5f5192b9 | 51 | |
67794292 | 52 | extern unsigned long max_pfn_mapped; |
7d1116a9 | 53 | |
345b904c JF |
54 | struct page; |
55 | ||
f2f7abcb | 56 | static inline void clear_user_page(void *page, unsigned long vaddr, |
345b904c JF |
57 | struct page *pg) |
58 | { | |
59 | clear_page(page); | |
60 | } | |
61 | ||
f2f7abcb | 62 | static inline void copy_user_page(void *to, void *from, unsigned long vaddr, |
345b904c JF |
63 | struct page *topage) |
64 | { | |
65 | copy_page(to, from); | |
66 | } | |
67 | ||
68 | #define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \ | |
69 | alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr) | |
70 | #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE | |
71 | ||
38f0f127 IM |
72 | typedef struct { pgdval_t pgd; } pgd_t; |
73 | typedef struct { pgprotval_t pgprot; } pgprot_t; | |
74 | ||
75 | static inline pgd_t native_make_pgd(pgdval_t val) | |
76 | { | |
77 | return (pgd_t) { val }; | |
78 | } | |
79 | ||
80 | static inline pgdval_t native_pgd_val(pgd_t pgd) | |
81 | { | |
82 | return pgd.pgd; | |
83 | } | |
84 | ||
85 | #if PAGETABLE_LEVELS >= 3 | |
86 | #if PAGETABLE_LEVELS == 4 | |
87 | typedef struct { pudval_t pud; } pud_t; | |
88 | ||
89 | static inline pud_t native_make_pud(pmdval_t val) | |
90 | { | |
91 | return (pud_t) { val }; | |
92 | } | |
93 | ||
94 | static inline pudval_t native_pud_val(pud_t pud) | |
95 | { | |
96 | return pud.pud; | |
97 | } | |
98 | #else /* PAGETABLE_LEVELS == 3 */ | |
99 | #include <asm-generic/pgtable-nopud.h> | |
2f98b2fa JF |
100 | |
101 | static inline pudval_t native_pud_val(pud_t pud) | |
102 | { | |
103 | return native_pgd_val(pud.pgd); | |
104 | } | |
38f0f127 IM |
105 | #endif /* PAGETABLE_LEVELS == 4 */ |
106 | ||
107 | typedef struct { pmdval_t pmd; } pmd_t; | |
108 | ||
109 | static inline pmd_t native_make_pmd(pmdval_t val) | |
110 | { | |
111 | return (pmd_t) { val }; | |
112 | } | |
113 | ||
114 | static inline pmdval_t native_pmd_val(pmd_t pmd) | |
115 | { | |
116 | return pmd.pmd; | |
117 | } | |
118 | #else /* PAGETABLE_LEVELS == 2 */ | |
119 | #include <asm-generic/pgtable-nopmd.h> | |
2f98b2fa JF |
120 | |
121 | static inline pmdval_t native_pmd_val(pmd_t pmd) | |
122 | { | |
123 | return native_pgd_val(pmd.pud.pgd); | |
124 | } | |
38f0f127 IM |
125 | #endif /* PAGETABLE_LEVELS >= 3 */ |
126 | ||
c8e5393a JF |
127 | static inline pte_t native_make_pte(pteval_t val) |
128 | { | |
129 | return (pte_t) { .pte = val }; | |
130 | } | |
131 | ||
132 | static inline pteval_t native_pte_val(pte_t pte) | |
133 | { | |
134 | return pte.pte; | |
135 | } | |
136 | ||
38f0f127 IM |
137 | #define pgprot_val(x) ((x).pgprot) |
138 | #define __pgprot(x) ((pgprot_t) { (x) } ) | |
139 | ||
140 | #ifdef CONFIG_PARAVIRT | |
141 | #include <asm/paravirt.h> | |
142 | #else /* !CONFIG_PARAVIRT */ | |
143 | ||
144 | #define pgd_val(x) native_pgd_val(x) | |
145 | #define __pgd(x) native_make_pgd(x) | |
146 | ||
147 | #ifndef __PAGETABLE_PUD_FOLDED | |
148 | #define pud_val(x) native_pud_val(x) | |
149 | #define __pud(x) native_make_pud(x) | |
150 | #endif | |
151 | ||
152 | #ifndef __PAGETABLE_PMD_FOLDED | |
153 | #define pmd_val(x) native_pmd_val(x) | |
154 | #define __pmd(x) native_make_pmd(x) | |
155 | #endif | |
156 | ||
157 | #define pte_val(x) native_pte_val(x) | |
158 | #define __pte(x) native_make_pte(x) | |
159 | ||
160 | #endif /* CONFIG_PARAVIRT */ | |
161 | ||
98fd5aee JF |
162 | #define __pa(x) __phys_addr((unsigned long)(x)) |
163 | /* __pa_symbol should be used for C visible symbols. | |
164 | This seems to be the official gcc blessed way to do such arithmetic. */ | |
165 | #define __pa_symbol(x) __pa(__phys_reloc_hide((unsigned long)(x))) | |
166 | ||
167 | #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET)) | |
168 | ||
169 | #define __boot_va(x) __va(x) | |
170 | #define __boot_pa(x) __pa(x) | |
171 | ||
172 | #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) | |
173 | #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) | |
174 | #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) | |
175 | ||
345b904c JF |
176 | #endif /* __ASSEMBLY__ */ |
177 | ||
e62f4473 JF |
178 | #include <asm-generic/memory_model.h> |
179 | #include <asm-generic/page.h> | |
180 | ||
181 | #define __HAVE_ARCH_GATE_AREA 1 | |
345b904c | 182 | |
11b7c7dc | 183 | #endif /* __KERNEL__ */ |
83a5101b | 184 | #endif /* _ASM_X86_PAGE_H */ |