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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 | ||
15 | #include <linux/config.h> | |
16 | ||
17 | #ifdef CONFIG_X86_USE_3DNOW | |
18 | ||
19 | #include <asm/mmx.h> | |
20 | ||
21 | #define clear_page(page) mmx_clear_page((void *)(page)) | |
22 | #define copy_page(to,from) mmx_copy_page(to,from) | |
23 | ||
24 | #else | |
25 | ||
26 | /* | |
27 | * On older X86 processors it's not a win to use MMX here it seems. | |
28 | * Maybe the K6-III ? | |
29 | */ | |
30 | ||
31 | #define clear_page(page) memset((void *)(page), 0, PAGE_SIZE) | |
32 | #define copy_page(to,from) memcpy((void *)(to), (void *)(from), PAGE_SIZE) | |
33 | ||
34 | #endif | |
35 | ||
36 | #define clear_user_page(page, vaddr, pg) clear_page(page) | |
37 | #define copy_user_page(to, from, vaddr, pg) copy_page(to, from) | |
38 | ||
39 | #define alloc_zeroed_user_highpage(vma, vaddr) alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO, vma, vaddr) | |
40 | #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE | |
41 | ||
42 | /* | |
43 | * These are used to make use of C type-checking.. | |
44 | */ | |
45 | extern int nx_enabled; | |
46 | #ifdef CONFIG_X86_PAE | |
47 | extern unsigned long long __supported_pte_mask; | |
48 | typedef struct { unsigned long pte_low, pte_high; } pte_t; | |
49 | typedef struct { unsigned long long pmd; } pmd_t; | |
50 | typedef struct { unsigned long long pgd; } pgd_t; | |
51 | typedef struct { unsigned long long pgprot; } pgprot_t; | |
52 | #define pmd_val(x) ((x).pmd) | |
53 | #define pte_val(x) ((x).pte_low | ((unsigned long long)(x).pte_high << 32)) | |
54 | #define __pmd(x) ((pmd_t) { (x) } ) | |
55 | #define HPAGE_SHIFT 21 | |
56 | #else | |
57 | typedef struct { unsigned long pte_low; } pte_t; | |
58 | typedef struct { unsigned long pgd; } pgd_t; | |
59 | typedef struct { unsigned long pgprot; } pgprot_t; | |
60 | #define boot_pte_t pte_t /* or would you rather have a typedef */ | |
61 | #define pte_val(x) ((x).pte_low) | |
62 | #define HPAGE_SHIFT 22 | |
63 | #endif | |
64 | #define PTE_MASK PAGE_MASK | |
65 | ||
66 | #ifdef CONFIG_HUGETLB_PAGE | |
67 | #define HPAGE_SIZE ((1UL) << HPAGE_SHIFT) | |
68 | #define HPAGE_MASK (~(HPAGE_SIZE - 1)) | |
69 | #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) | |
70 | #define HAVE_ARCH_HUGETLB_UNMAPPED_AREA | |
71 | #endif | |
72 | ||
73 | #define pgd_val(x) ((x).pgd) | |
74 | #define pgprot_val(x) ((x).pgprot) | |
75 | ||
76 | #define __pte(x) ((pte_t) { (x) } ) | |
77 | #define __pgd(x) ((pgd_t) { (x) } ) | |
78 | #define __pgprot(x) ((pgprot_t) { (x) } ) | |
79 | ||
80 | #endif /* !__ASSEMBLY__ */ | |
81 | ||
82 | /* to align the pointer to the (next) page boundary */ | |
83 | #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK) | |
84 | ||
85 | /* | |
86 | * This handles the memory map.. We could make this a config | |
87 | * option, but too many people screw it up, and too few need | |
88 | * it. | |
89 | * | |
90 | * A __PAGE_OFFSET of 0xC0000000 means that the kernel has | |
91 | * a virtual address space of one gigabyte, which limits the | |
92 | * amount of physical memory you can use to about 950MB. | |
93 | * | |
94 | * If you want more physical memory than this then see the CONFIG_HIGHMEM4G | |
95 | * and CONFIG_HIGHMEM64G options in the kernel configuration. | |
96 | */ | |
97 | ||
98 | #ifndef __ASSEMBLY__ | |
99 | ||
100 | /* | |
101 | * This much address space is reserved for vmalloc() and iomap() | |
102 | * as well as fixmap mappings. | |
103 | */ | |
104 | extern unsigned int __VMALLOC_RESERVE; | |
105 | ||
1da177e4 LT |
106 | extern int sysctl_legacy_va_layout; |
107 | ||
5b505b90 DH |
108 | extern int page_is_ram(unsigned long pagenr); |
109 | ||
1da177e4 LT |
110 | #endif /* __ASSEMBLY__ */ |
111 | ||
112 | #ifdef __ASSEMBLY__ | |
113 | #define __PAGE_OFFSET (0xC0000000) | |
3d345e3f | 114 | #define __PHYSICAL_START CONFIG_PHYSICAL_START |
1da177e4 LT |
115 | #else |
116 | #define __PAGE_OFFSET (0xC0000000UL) | |
3d345e3f | 117 | #define __PHYSICAL_START ((unsigned long)CONFIG_PHYSICAL_START) |
1da177e4 | 118 | #endif |
3d345e3f | 119 | #define __KERNEL_START (__PAGE_OFFSET + __PHYSICAL_START) |
1da177e4 LT |
120 | |
121 | ||
122 | #define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET) | |
123 | #define VMALLOC_RESERVE ((unsigned long)__VMALLOC_RESERVE) | |
124 | #define MAXMEM (-__PAGE_OFFSET-__VMALLOC_RESERVE) | |
125 | #define __pa(x) ((unsigned long)(x)-PAGE_OFFSET) | |
126 | #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET)) | |
127 | #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) | |
05b79bdc | 128 | #ifdef CONFIG_FLATMEM |
1da177e4 LT |
129 | #define pfn_to_page(pfn) (mem_map + (pfn)) |
130 | #define page_to_pfn(page) ((unsigned long)((page) - mem_map)) | |
131 | #define pfn_valid(pfn) ((pfn) < max_mapnr) | |
05b79bdc | 132 | #endif /* CONFIG_FLATMEM */ |
1da177e4 LT |
133 | #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) |
134 | ||
135 | #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) | |
136 | ||
137 | #define VM_DATA_DEFAULT_FLAGS \ | |
138 | (VM_READ | VM_WRITE | \ | |
139 | ((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0 ) | \ | |
140 | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) | |
141 | ||
142 | #endif /* __KERNEL__ */ | |
143 | ||
fd4fd5aa SR |
144 | #include <asm-generic/page.h> |
145 | ||
1da177e4 | 146 | #endif /* _I386_PAGE_H */ |