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1da177e4 LT |
1 | #ifndef _I386_PAGE_H |
2 | #define _I386_PAGE_H | |
3 | ||
4 | /* PAGE_SHIFT determines the page size */ | |
5 | #define PAGE_SHIFT 12 | |
6 | #define PAGE_SIZE (1UL << PAGE_SHIFT) | |
7 | #define PAGE_MASK (~(PAGE_SIZE-1)) | |
8 | ||
9 | #define LARGE_PAGE_MASK (~(LARGE_PAGE_SIZE-1)) | |
10 | #define LARGE_PAGE_SIZE (1UL << PMD_SHIFT) | |
11 | ||
12 | #ifdef __KERNEL__ | |
13 | #ifndef __ASSEMBLY__ | |
14 | ||
1da177e4 LT |
15 | #ifdef CONFIG_X86_USE_3DNOW |
16 | ||
17 | #include <asm/mmx.h> | |
18 | ||
19 | #define clear_page(page) mmx_clear_page((void *)(page)) | |
20 | #define copy_page(to,from) mmx_copy_page(to,from) | |
21 | ||
22 | #else | |
23 | ||
24 | /* | |
25 | * On older X86 processors it's not a win to use MMX here it seems. | |
26 | * Maybe the K6-III ? | |
27 | */ | |
28 | ||
29 | #define clear_page(page) memset((void *)(page), 0, PAGE_SIZE) | |
30 | #define copy_page(to,from) memcpy((void *)(to), (void *)(from), PAGE_SIZE) | |
31 | ||
32 | #endif | |
33 | ||
34 | #define clear_user_page(page, vaddr, pg) clear_page(page) | |
35 | #define copy_user_page(to, from, vaddr, pg) copy_page(to, from) | |
36 | ||
37 | #define alloc_zeroed_user_highpage(vma, vaddr) alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO, vma, vaddr) | |
38 | #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE | |
39 | ||
40 | /* | |
41 | * These are used to make use of C type-checking.. | |
42 | */ | |
43 | extern int nx_enabled; | |
3dc494e8 | 44 | |
1da177e4 LT |
45 | #ifdef CONFIG_X86_PAE |
46 | extern unsigned long long __supported_pte_mask; | |
47 | typedef struct { unsigned long pte_low, pte_high; } pte_t; | |
48 | typedef struct { unsigned long long pmd; } pmd_t; | |
49 | typedef struct { unsigned long long pgd; } pgd_t; | |
50 | typedef struct { unsigned long long pgprot; } pgprot_t; | |
3dc494e8 JF |
51 | |
52 | static inline unsigned long long native_pgd_val(pgd_t pgd) | |
53 | { | |
54 | return pgd.pgd; | |
55 | } | |
56 | ||
57 | static inline unsigned long long native_pmd_val(pmd_t pmd) | |
58 | { | |
59 | return pmd.pmd; | |
60 | } | |
61 | ||
62 | static inline unsigned long long native_pte_val(pte_t pte) | |
63 | { | |
64 | return pte.pte_low | ((unsigned long long)pte.pte_high << 32); | |
65 | } | |
66 | ||
67 | static inline pgd_t native_make_pgd(unsigned long long val) | |
68 | { | |
69 | return (pgd_t) { val }; | |
70 | } | |
71 | ||
72 | static inline pmd_t native_make_pmd(unsigned long long val) | |
73 | { | |
74 | return (pmd_t) { val }; | |
75 | } | |
76 | ||
77 | static inline pte_t native_make_pte(unsigned long long val) | |
78 | { | |
79 | return (pte_t) { .pte_low = val, .pte_high = (val >> 32) } ; | |
80 | } | |
81 | ||
82 | #ifndef CONFIG_PARAVIRT | |
83 | #define pmd_val(x) native_pmd_val(x) | |
84 | #define __pmd(x) native_make_pmd(x) | |
85 | #endif | |
86 | ||
1da177e4 | 87 | #define HPAGE_SHIFT 21 |
a2952d89 | 88 | #include <asm-generic/pgtable-nopud.h> |
3dc494e8 | 89 | #else /* !CONFIG_X86_PAE */ |
1da177e4 LT |
90 | typedef struct { unsigned long pte_low; } pte_t; |
91 | typedef struct { unsigned long pgd; } pgd_t; | |
92 | typedef struct { unsigned long pgprot; } pgprot_t; | |
93 | #define boot_pte_t pte_t /* or would you rather have a typedef */ | |
3dc494e8 JF |
94 | |
95 | static inline unsigned long native_pgd_val(pgd_t pgd) | |
96 | { | |
97 | return pgd.pgd; | |
98 | } | |
99 | ||
100 | static inline unsigned long native_pte_val(pte_t pte) | |
101 | { | |
102 | return pte.pte_low; | |
103 | } | |
104 | ||
105 | static inline pgd_t native_make_pgd(unsigned long val) | |
106 | { | |
107 | return (pgd_t) { val }; | |
108 | } | |
109 | ||
110 | static inline pte_t native_make_pte(unsigned long val) | |
111 | { | |
112 | return (pte_t) { .pte_low = val }; | |
113 | } | |
114 | ||
1da177e4 | 115 | #define HPAGE_SHIFT 22 |
a2952d89 | 116 | #include <asm-generic/pgtable-nopmd.h> |
3dc494e8 JF |
117 | #endif /* CONFIG_X86_PAE */ |
118 | ||
1da177e4 LT |
119 | #define PTE_MASK PAGE_MASK |
120 | ||
121 | #ifdef CONFIG_HUGETLB_PAGE | |
122 | #define HPAGE_SIZE ((1UL) << HPAGE_SHIFT) | |
123 | #define HPAGE_MASK (~(HPAGE_SIZE - 1)) | |
124 | #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) | |
125 | #define HAVE_ARCH_HUGETLB_UNMAPPED_AREA | |
126 | #endif | |
127 | ||
1da177e4 | 128 | #define pgprot_val(x) ((x).pgprot) |
1da177e4 LT |
129 | #define __pgprot(x) ((pgprot_t) { (x) } ) |
130 | ||
3dc494e8 JF |
131 | #ifndef CONFIG_PARAVIRT |
132 | #define pgd_val(x) native_pgd_val(x) | |
133 | #define __pgd(x) native_make_pgd(x) | |
134 | #define pte_val(x) native_pte_val(x) | |
135 | #define __pte(x) native_make_pte(x) | |
136 | #endif | |
137 | ||
1da177e4 LT |
138 | #endif /* !__ASSEMBLY__ */ |
139 | ||
140 | /* to align the pointer to the (next) page boundary */ | |
141 | #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK) | |
142 | ||
143 | /* | |
144 | * This handles the memory map.. We could make this a config | |
145 | * option, but too many people screw it up, and too few need | |
146 | * it. | |
147 | * | |
148 | * A __PAGE_OFFSET of 0xC0000000 means that the kernel has | |
149 | * a virtual address space of one gigabyte, which limits the | |
150 | * amount of physical memory you can use to about 950MB. | |
151 | * | |
152 | * If you want more physical memory than this then see the CONFIG_HIGHMEM4G | |
153 | * and CONFIG_HIGHMEM64G options in the kernel configuration. | |
154 | */ | |
155 | ||
156 | #ifndef __ASSEMBLY__ | |
157 | ||
e6e5494c IM |
158 | struct vm_area_struct; |
159 | ||
1da177e4 LT |
160 | /* |
161 | * This much address space is reserved for vmalloc() and iomap() | |
162 | * as well as fixmap mappings. | |
163 | */ | |
164 | extern unsigned int __VMALLOC_RESERVE; | |
165 | ||
1da177e4 LT |
166 | extern int sysctl_legacy_va_layout; |
167 | ||
5b505b90 DH |
168 | extern int page_is_ram(unsigned long pagenr); |
169 | ||
1da177e4 LT |
170 | #endif /* __ASSEMBLY__ */ |
171 | ||
172 | #ifdef __ASSEMBLY__ | |
975b3d3d | 173 | #define __PAGE_OFFSET CONFIG_PAGE_OFFSET |
1da177e4 | 174 | #else |
975b3d3d | 175 | #define __PAGE_OFFSET ((unsigned long)CONFIG_PAGE_OFFSET) |
1da177e4 LT |
176 | #endif |
177 | ||
178 | ||
179 | #define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET) | |
180 | #define VMALLOC_RESERVE ((unsigned long)__VMALLOC_RESERVE) | |
181 | #define MAXMEM (-__PAGE_OFFSET-__VMALLOC_RESERVE) | |
182 | #define __pa(x) ((unsigned long)(x)-PAGE_OFFSET) | |
9f45accf EB |
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(RELOC_HIDE((unsigned long)(x),0)) | |
1da177e4 LT |
186 | #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET)) |
187 | #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) | |
05b79bdc | 188 | #ifdef CONFIG_FLATMEM |
1da177e4 | 189 | #define pfn_valid(pfn) ((pfn) < max_mapnr) |
05b79bdc | 190 | #endif /* CONFIG_FLATMEM */ |
1da177e4 LT |
191 | #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) |
192 | ||
193 | #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) | |
194 | ||
195 | #define VM_DATA_DEFAULT_FLAGS \ | |
196 | (VM_READ | VM_WRITE | \ | |
197 | ((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \ | |
198 | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) | |
199 | ||
ad658b38 | 200 | #include <asm-generic/memory_model.h> |
fd4fd5aa SR |
201 | #include <asm-generic/page.h> |
202 | ||
e6e5494c | 203 | #define __HAVE_ARCH_GATE_AREA 1 |
cd469e0c DW |
204 | #endif /* __KERNEL__ */ |
205 | ||
1da177e4 | 206 | #endif /* _I386_PAGE_H */ |