Commit | Line | Data |
---|---|---|
77ef50a5 VN |
1 | #ifndef ASM_X86__PAGE_H |
2 | #define ASM_X86__PAGE_H | |
83a5101b JF |
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); |
9542ada8 | 60 | extern int pagerange_is_ram(unsigned long start, unsigned long end); |
ae531c26 | 61 | extern int devmem_is_allowed(unsigned long pagenr); |
635ee418 TG |
62 | extern void map_devmem(unsigned long pfn, unsigned long size, |
63 | pgprot_t vma_prot); | |
64 | extern void unmap_devmem(unsigned long pfn, unsigned long size, | |
65 | pgprot_t vma_prot); | |
5f5192b9 | 66 | |
f361a450 | 67 | extern unsigned long max_low_pfn_mapped; |
67794292 | 68 | extern unsigned long max_pfn_mapped; |
7d1116a9 | 69 | |
345b904c JF |
70 | struct page; |
71 | ||
f2f7abcb | 72 | static inline void clear_user_page(void *page, unsigned long vaddr, |
345b904c JF |
73 | struct page *pg) |
74 | { | |
75 | clear_page(page); | |
76 | } | |
77 | ||
f2f7abcb | 78 | static inline void copy_user_page(void *to, void *from, unsigned long vaddr, |
345b904c JF |
79 | struct page *topage) |
80 | { | |
81 | copy_page(to, from); | |
82 | } | |
83 | ||
84 | #define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \ | |
85 | alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr) | |
86 | #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE | |
87 | ||
38f0f127 IM |
88 | static inline pgd_t native_make_pgd(pgdval_t val) |
89 | { | |
90 | return (pgd_t) { val }; | |
91 | } | |
92 | ||
93 | static inline pgdval_t native_pgd_val(pgd_t pgd) | |
94 | { | |
95 | return pgd.pgd; | |
96 | } | |
97 | ||
98 | #if PAGETABLE_LEVELS >= 3 | |
99 | #if PAGETABLE_LEVELS == 4 | |
100 | typedef struct { pudval_t pud; } pud_t; | |
101 | ||
102 | static inline pud_t native_make_pud(pmdval_t val) | |
103 | { | |
104 | return (pud_t) { val }; | |
105 | } | |
106 | ||
107 | static inline pudval_t native_pud_val(pud_t pud) | |
108 | { | |
109 | return pud.pud; | |
110 | } | |
111 | #else /* PAGETABLE_LEVELS == 3 */ | |
112 | #include <asm-generic/pgtable-nopud.h> | |
2f98b2fa JF |
113 | |
114 | static inline pudval_t native_pud_val(pud_t pud) | |
115 | { | |
116 | return native_pgd_val(pud.pgd); | |
117 | } | |
38f0f127 IM |
118 | #endif /* PAGETABLE_LEVELS == 4 */ |
119 | ||
120 | typedef struct { pmdval_t pmd; } pmd_t; | |
121 | ||
122 | static inline pmd_t native_make_pmd(pmdval_t val) | |
123 | { | |
124 | return (pmd_t) { val }; | |
125 | } | |
126 | ||
127 | static inline pmdval_t native_pmd_val(pmd_t pmd) | |
128 | { | |
129 | return pmd.pmd; | |
130 | } | |
131 | #else /* PAGETABLE_LEVELS == 2 */ | |
132 | #include <asm-generic/pgtable-nopmd.h> | |
2f98b2fa JF |
133 | |
134 | static inline pmdval_t native_pmd_val(pmd_t pmd) | |
135 | { | |
136 | return native_pgd_val(pmd.pud.pgd); | |
137 | } | |
38f0f127 IM |
138 | #endif /* PAGETABLE_LEVELS >= 3 */ |
139 | ||
c8e5393a JF |
140 | static inline pte_t native_make_pte(pteval_t val) |
141 | { | |
142 | return (pte_t) { .pte = val }; | |
143 | } | |
144 | ||
145 | static inline pteval_t native_pte_val(pte_t pte) | |
146 | { | |
147 | return pte.pte; | |
148 | } | |
149 | ||
c2e3277f RR |
150 | static inline pteval_t native_pte_flags(pte_t pte) |
151 | { | |
77be1fab | 152 | return native_pte_val(pte) & PTE_FLAGS_MASK; |
c2e3277f RR |
153 | } |
154 | ||
38f0f127 IM |
155 | #define pgprot_val(x) ((x).pgprot) |
156 | #define __pgprot(x) ((pgprot_t) { (x) } ) | |
157 | ||
158 | #ifdef CONFIG_PARAVIRT | |
159 | #include <asm/paravirt.h> | |
160 | #else /* !CONFIG_PARAVIRT */ | |
161 | ||
162 | #define pgd_val(x) native_pgd_val(x) | |
163 | #define __pgd(x) native_make_pgd(x) | |
164 | ||
165 | #ifndef __PAGETABLE_PUD_FOLDED | |
166 | #define pud_val(x) native_pud_val(x) | |
167 | #define __pud(x) native_make_pud(x) | |
168 | #endif | |
169 | ||
170 | #ifndef __PAGETABLE_PMD_FOLDED | |
171 | #define pmd_val(x) native_pmd_val(x) | |
172 | #define __pmd(x) native_make_pmd(x) | |
173 | #endif | |
174 | ||
175 | #define pte_val(x) native_pte_val(x) | |
c2e3277f | 176 | #define pte_flags(x) native_pte_flags(x) |
38f0f127 IM |
177 | #define __pte(x) native_make_pte(x) |
178 | ||
179 | #endif /* CONFIG_PARAVIRT */ | |
180 | ||
98fd5aee | 181 | #define __pa(x) __phys_addr((unsigned long)(x)) |
af5c2bd1 | 182 | #define __pa_nodebug(x) __phys_addr_nodebug((unsigned long)(x)) |
98fd5aee JF |
183 | /* __pa_symbol should be used for C visible symbols. |
184 | This seems to be the official gcc blessed way to do such arithmetic. */ | |
185 | #define __pa_symbol(x) __pa(__phys_reloc_hide((unsigned long)(x))) | |
186 | ||
187 | #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET)) | |
188 | ||
189 | #define __boot_va(x) __va(x) | |
190 | #define __boot_pa(x) __pa(x) | |
191 | ||
af5c2bd1 VN |
192 | /* |
193 | * virt_to_page(kaddr) returns a valid pointer if and only if | |
194 | * virt_addr_valid(kaddr) returns true. | |
195 | */ | |
98fd5aee JF |
196 | #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) |
197 | #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) | |
af5c2bd1 VN |
198 | extern bool __virt_addr_valid(unsigned long kaddr); |
199 | #define virt_addr_valid(kaddr) __virt_addr_valid((unsigned long) (kaddr)) | |
98fd5aee | 200 | |
345b904c JF |
201 | #endif /* __ASSEMBLY__ */ |
202 | ||
e62f4473 JF |
203 | #include <asm-generic/memory_model.h> |
204 | #include <asm-generic/page.h> | |
205 | ||
206 | #define __HAVE_ARCH_GATE_AREA 1 | |
345b904c | 207 | |
11b7c7dc | 208 | #endif /* __KERNEL__ */ |
77ef50a5 | 209 | #endif /* ASM_X86__PAGE_H */ |