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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 | ||
c57c05d0 JF |
13 | #define __PHYSICAL_MASK ((phys_addr_t)(1ULL << __PHYSICAL_MASK_SHIFT) - 1) |
14 | #define __VIRTUAL_MASK ((1UL << __VIRTUAL_MASK_SHIFT) - 1) | |
15 | ||
2bd3a99c JF |
16 | /* Cast PAGE_MASK to a signed type so that it is sign-extended if |
17 | virtual addresses are 32-bits but physical addresses are larger | |
18 | (ie, 32-bit PAE). */ | |
19 | #define PHYSICAL_PAGE_MASK (((signed long)PAGE_MASK) & __PHYSICAL_MASK) | |
20 | ||
59438c9f JF |
21 | /* PTE_PFN_MASK extracts the PFN from a (pte|pmd|pud|pgd)val_t */ |
22 | #define PTE_PFN_MASK ((pteval_t)PHYSICAL_PAGE_MASK) | |
83a5101b | 23 | |
77be1fab JF |
24 | /* PTE_FLAGS_MASK extracts the flags from a (pte|pmd|pud|pgd)val_t */ |
25 | #define PTE_FLAGS_MASK (~PTE_PFN_MASK) | |
26 | ||
31422c51 AK |
27 | #define PMD_PAGE_SIZE (_AC(1, UL) << PMD_SHIFT) |
28 | #define PMD_PAGE_MASK (~(PMD_PAGE_SIZE-1)) | |
83a5101b JF |
29 | |
30 | #define HPAGE_SHIFT PMD_SHIFT | |
31 | #define HPAGE_SIZE (_AC(1,UL) << HPAGE_SHIFT) | |
32 | #define HPAGE_MASK (~(HPAGE_SIZE - 1)) | |
33 | #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) | |
34 | ||
b4718e62 AK |
35 | #define HUGE_MAX_HSTATE 2 |
36 | ||
3da1bcc2 IM |
37 | #ifndef __ASSEMBLY__ |
38 | #include <linux/types.h> | |
39 | #endif | |
83a5101b JF |
40 | |
41 | #ifdef CONFIG_X86_64 | |
11b7c7dc JF |
42 | #include <asm/page_64.h> |
43 | #else | |
44 | #include <asm/page_32.h> | |
83a5101b JF |
45 | #endif /* CONFIG_X86_64 */ |
46 | ||
83a5101b JF |
47 | #define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET) |
48 | ||
49 | #define VM_DATA_DEFAULT_FLAGS \ | |
50 | (((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \ | |
51 | VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) | |
52 | ||
53 | ||
345b904c | 54 | #ifndef __ASSEMBLY__ |
5f5192b9 | 55 | |
635ee418 TG |
56 | typedef struct { pgdval_t pgd; } pgd_t; |
57 | typedef struct { pgprotval_t pgprot; } pgprot_t; | |
58 | ||
5f5192b9 | 59 | extern int page_is_ram(unsigned long pagenr); |
ae531c26 | 60 | extern int devmem_is_allowed(unsigned long pagenr); |
635ee418 TG |
61 | extern void map_devmem(unsigned long pfn, unsigned long size, |
62 | pgprot_t vma_prot); | |
63 | extern void unmap_devmem(unsigned long pfn, unsigned long size, | |
64 | pgprot_t vma_prot); | |
5f5192b9 | 65 | |
f361a450 | 66 | extern unsigned long max_low_pfn_mapped; |
67794292 | 67 | extern unsigned long max_pfn_mapped; |
7d1116a9 | 68 | |
345b904c JF |
69 | struct page; |
70 | ||
f2f7abcb | 71 | static inline void clear_user_page(void *page, unsigned long vaddr, |
345b904c JF |
72 | struct page *pg) |
73 | { | |
74 | clear_page(page); | |
75 | } | |
76 | ||
f2f7abcb | 77 | static inline void copy_user_page(void *to, void *from, unsigned long vaddr, |
345b904c JF |
78 | struct page *topage) |
79 | { | |
80 | copy_page(to, from); | |
81 | } | |
82 | ||
83 | #define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \ | |
84 | alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr) | |
85 | #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE | |
86 | ||
38f0f127 IM |
87 | static inline pgd_t native_make_pgd(pgdval_t val) |
88 | { | |
89 | return (pgd_t) { val }; | |
90 | } | |
91 | ||
92 | static inline pgdval_t native_pgd_val(pgd_t pgd) | |
93 | { | |
94 | return pgd.pgd; | |
95 | } | |
96 | ||
97 | #if PAGETABLE_LEVELS >= 3 | |
98 | #if PAGETABLE_LEVELS == 4 | |
99 | typedef struct { pudval_t pud; } pud_t; | |
100 | ||
101 | static inline pud_t native_make_pud(pmdval_t val) | |
102 | { | |
103 | return (pud_t) { val }; | |
104 | } | |
105 | ||
106 | static inline pudval_t native_pud_val(pud_t pud) | |
107 | { | |
108 | return pud.pud; | |
109 | } | |
110 | #else /* PAGETABLE_LEVELS == 3 */ | |
111 | #include <asm-generic/pgtable-nopud.h> | |
2f98b2fa JF |
112 | |
113 | static inline pudval_t native_pud_val(pud_t pud) | |
114 | { | |
115 | return native_pgd_val(pud.pgd); | |
116 | } | |
38f0f127 IM |
117 | #endif /* PAGETABLE_LEVELS == 4 */ |
118 | ||
119 | typedef struct { pmdval_t pmd; } pmd_t; | |
120 | ||
121 | static inline pmd_t native_make_pmd(pmdval_t val) | |
122 | { | |
123 | return (pmd_t) { val }; | |
124 | } | |
125 | ||
126 | static inline pmdval_t native_pmd_val(pmd_t pmd) | |
127 | { | |
128 | return pmd.pmd; | |
129 | } | |
130 | #else /* PAGETABLE_LEVELS == 2 */ | |
131 | #include <asm-generic/pgtable-nopmd.h> | |
2f98b2fa JF |
132 | |
133 | static inline pmdval_t native_pmd_val(pmd_t pmd) | |
134 | { | |
135 | return native_pgd_val(pmd.pud.pgd); | |
136 | } | |
38f0f127 IM |
137 | #endif /* PAGETABLE_LEVELS >= 3 */ |
138 | ||
c8e5393a JF |
139 | static inline pte_t native_make_pte(pteval_t val) |
140 | { | |
141 | return (pte_t) { .pte = val }; | |
142 | } | |
143 | ||
144 | static inline pteval_t native_pte_val(pte_t pte) | |
145 | { | |
146 | return pte.pte; | |
147 | } | |
148 | ||
c2e3277f RR |
149 | static inline pteval_t native_pte_flags(pte_t pte) |
150 | { | |
77be1fab | 151 | return native_pte_val(pte) & PTE_FLAGS_MASK; |
c2e3277f RR |
152 | } |
153 | ||
38f0f127 IM |
154 | #define pgprot_val(x) ((x).pgprot) |
155 | #define __pgprot(x) ((pgprot_t) { (x) } ) | |
156 | ||
157 | #ifdef CONFIG_PARAVIRT | |
158 | #include <asm/paravirt.h> | |
159 | #else /* !CONFIG_PARAVIRT */ | |
160 | ||
161 | #define pgd_val(x) native_pgd_val(x) | |
162 | #define __pgd(x) native_make_pgd(x) | |
163 | ||
164 | #ifndef __PAGETABLE_PUD_FOLDED | |
165 | #define pud_val(x) native_pud_val(x) | |
166 | #define __pud(x) native_make_pud(x) | |
167 | #endif | |
168 | ||
169 | #ifndef __PAGETABLE_PMD_FOLDED | |
170 | #define pmd_val(x) native_pmd_val(x) | |
171 | #define __pmd(x) native_make_pmd(x) | |
172 | #endif | |
173 | ||
174 | #define pte_val(x) native_pte_val(x) | |
c2e3277f | 175 | #define pte_flags(x) native_pte_flags(x) |
38f0f127 IM |
176 | #define __pte(x) native_make_pte(x) |
177 | ||
178 | #endif /* CONFIG_PARAVIRT */ | |
179 | ||
98fd5aee JF |
180 | #define __pa(x) __phys_addr((unsigned long)(x)) |
181 | /* __pa_symbol should be used for C visible symbols. | |
182 | This seems to be the official gcc blessed way to do such arithmetic. */ | |
183 | #define __pa_symbol(x) __pa(__phys_reloc_hide((unsigned long)(x))) | |
184 | ||
185 | #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET)) | |
186 | ||
187 | #define __boot_va(x) __va(x) | |
188 | #define __boot_pa(x) __pa(x) | |
189 | ||
190 | #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) | |
191 | #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) | |
192 | #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) | |
193 | ||
345b904c JF |
194 | #endif /* __ASSEMBLY__ */ |
195 | ||
e62f4473 JF |
196 | #include <asm-generic/memory_model.h> |
197 | #include <asm-generic/page.h> | |
198 | ||
199 | #define __HAVE_ARCH_GATE_AREA 1 | |
345b904c | 200 | |
11b7c7dc | 201 | #endif /* __KERNEL__ */ |
83a5101b | 202 | #endif /* _ASM_X86_PAGE_H */ |