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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 | ||
2bd3a99c JF |
13 | /* Cast PAGE_MASK to a signed type so that it is sign-extended if |
14 | virtual addresses are 32-bits but physical addresses are larger | |
15 | (ie, 32-bit PAE). */ | |
16 | #define PHYSICAL_PAGE_MASK (((signed long)PAGE_MASK) & __PHYSICAL_MASK) | |
17 | ||
18 | /* PTE_MASK extracts the PFN from a (pte|pmd|pud|pgd)val_t */ | |
19 | #define PTE_MASK ((pteval_t)PHYSICAL_PAGE_MASK) | |
83a5101b | 20 | |
31422c51 AK |
21 | #define PMD_PAGE_SIZE (_AC(1, UL) << PMD_SHIFT) |
22 | #define PMD_PAGE_MASK (~(PMD_PAGE_SIZE-1)) | |
83a5101b JF |
23 | |
24 | #define HPAGE_SHIFT PMD_SHIFT | |
25 | #define HPAGE_SIZE (_AC(1,UL) << HPAGE_SHIFT) | |
26 | #define HPAGE_MASK (~(HPAGE_SIZE - 1)) | |
27 | #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) | |
28 | ||
29 | /* to align the pointer to the (next) page boundary */ | |
30 | #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK) | |
31 | ||
1bb271db | 32 | #define __PHYSICAL_MASK ((phys_addr_t)(1ULL << __PHYSICAL_MASK_SHIFT) - 1) |
2bd3a99c | 33 | #define __VIRTUAL_MASK ((1UL << __VIRTUAL_MASK_SHIFT) - 1) |
83a5101b | 34 | |
3da1bcc2 IM |
35 | #ifndef __ASSEMBLY__ |
36 | #include <linux/types.h> | |
37 | #endif | |
83a5101b JF |
38 | |
39 | #ifdef CONFIG_X86_64 | |
11b7c7dc JF |
40 | #include <asm/page_64.h> |
41 | #else | |
42 | #include <asm/page_32.h> | |
83a5101b JF |
43 | #endif /* CONFIG_X86_64 */ |
44 | ||
83a5101b JF |
45 | #define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET) |
46 | ||
47 | #define VM_DATA_DEFAULT_FLAGS \ | |
48 | (((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \ | |
49 | VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) | |
50 | ||
51 | ||
345b904c | 52 | #ifndef __ASSEMBLY__ |
5f5192b9 TG |
53 | |
54 | extern int page_is_ram(unsigned long pagenr); | |
ae531c26 | 55 | extern int devmem_is_allowed(unsigned long pagenr); |
5f5192b9 | 56 | |
67794292 | 57 | extern unsigned long max_pfn_mapped; |
7d1116a9 | 58 | |
345b904c JF |
59 | struct page; |
60 | ||
f2f7abcb | 61 | static inline void clear_user_page(void *page, unsigned long vaddr, |
345b904c JF |
62 | struct page *pg) |
63 | { | |
64 | clear_page(page); | |
65 | } | |
66 | ||
f2f7abcb | 67 | static inline void copy_user_page(void *to, void *from, unsigned long vaddr, |
345b904c JF |
68 | struct page *topage) |
69 | { | |
70 | copy_page(to, from); | |
71 | } | |
72 | ||
73 | #define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \ | |
74 | alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr) | |
75 | #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE | |
76 | ||
38f0f127 IM |
77 | typedef struct { pgdval_t pgd; } pgd_t; |
78 | typedef struct { pgprotval_t pgprot; } pgprot_t; | |
79 | ||
80 | static inline pgd_t native_make_pgd(pgdval_t val) | |
81 | { | |
82 | return (pgd_t) { val }; | |
83 | } | |
84 | ||
85 | static inline pgdval_t native_pgd_val(pgd_t pgd) | |
86 | { | |
87 | return pgd.pgd; | |
88 | } | |
89 | ||
90 | #if PAGETABLE_LEVELS >= 3 | |
91 | #if PAGETABLE_LEVELS == 4 | |
92 | typedef struct { pudval_t pud; } pud_t; | |
93 | ||
94 | static inline pud_t native_make_pud(pmdval_t val) | |
95 | { | |
96 | return (pud_t) { val }; | |
97 | } | |
98 | ||
99 | static inline pudval_t native_pud_val(pud_t pud) | |
100 | { | |
101 | return pud.pud; | |
102 | } | |
103 | #else /* PAGETABLE_LEVELS == 3 */ | |
104 | #include <asm-generic/pgtable-nopud.h> | |
2f98b2fa JF |
105 | |
106 | static inline pudval_t native_pud_val(pud_t pud) | |
107 | { | |
108 | return native_pgd_val(pud.pgd); | |
109 | } | |
38f0f127 IM |
110 | #endif /* PAGETABLE_LEVELS == 4 */ |
111 | ||
112 | typedef struct { pmdval_t pmd; } pmd_t; | |
113 | ||
114 | static inline pmd_t native_make_pmd(pmdval_t val) | |
115 | { | |
116 | return (pmd_t) { val }; | |
117 | } | |
118 | ||
119 | static inline pmdval_t native_pmd_val(pmd_t pmd) | |
120 | { | |
121 | return pmd.pmd; | |
122 | } | |
123 | #else /* PAGETABLE_LEVELS == 2 */ | |
124 | #include <asm-generic/pgtable-nopmd.h> | |
2f98b2fa JF |
125 | |
126 | static inline pmdval_t native_pmd_val(pmd_t pmd) | |
127 | { | |
128 | return native_pgd_val(pmd.pud.pgd); | |
129 | } | |
38f0f127 IM |
130 | #endif /* PAGETABLE_LEVELS >= 3 */ |
131 | ||
c8e5393a JF |
132 | static inline pte_t native_make_pte(pteval_t val) |
133 | { | |
134 | return (pte_t) { .pte = val }; | |
135 | } | |
136 | ||
137 | static inline pteval_t native_pte_val(pte_t pte) | |
138 | { | |
139 | return pte.pte; | |
140 | } | |
141 | ||
38f0f127 IM |
142 | #define pgprot_val(x) ((x).pgprot) |
143 | #define __pgprot(x) ((pgprot_t) { (x) } ) | |
144 | ||
145 | #ifdef CONFIG_PARAVIRT | |
146 | #include <asm/paravirt.h> | |
147 | #else /* !CONFIG_PARAVIRT */ | |
148 | ||
149 | #define pgd_val(x) native_pgd_val(x) | |
150 | #define __pgd(x) native_make_pgd(x) | |
151 | ||
152 | #ifndef __PAGETABLE_PUD_FOLDED | |
153 | #define pud_val(x) native_pud_val(x) | |
154 | #define __pud(x) native_make_pud(x) | |
155 | #endif | |
156 | ||
157 | #ifndef __PAGETABLE_PMD_FOLDED | |
158 | #define pmd_val(x) native_pmd_val(x) | |
159 | #define __pmd(x) native_make_pmd(x) | |
160 | #endif | |
161 | ||
162 | #define pte_val(x) native_pte_val(x) | |
163 | #define __pte(x) native_make_pte(x) | |
164 | ||
165 | #endif /* CONFIG_PARAVIRT */ | |
166 | ||
98fd5aee JF |
167 | #define __pa(x) __phys_addr((unsigned long)(x)) |
168 | /* __pa_symbol should be used for C visible symbols. | |
169 | This seems to be the official gcc blessed way to do such arithmetic. */ | |
170 | #define __pa_symbol(x) __pa(__phys_reloc_hide((unsigned long)(x))) | |
171 | ||
172 | #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET)) | |
173 | ||
174 | #define __boot_va(x) __va(x) | |
175 | #define __boot_pa(x) __pa(x) | |
176 | ||
177 | #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) | |
178 | #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) | |
179 | #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) | |
180 | ||
345b904c JF |
181 | #endif /* __ASSEMBLY__ */ |
182 | ||
e62f4473 JF |
183 | #include <asm-generic/memory_model.h> |
184 | #include <asm-generic/page.h> | |
185 | ||
186 | #define __HAVE_ARCH_GATE_AREA 1 | |
345b904c | 187 | |
11b7c7dc | 188 | #endif /* __KERNEL__ */ |
83a5101b | 189 | #endif /* _ASM_X86_PAGE_H */ |