]>
Commit | Line | Data |
---|---|---|
11b7c7dc JF |
1 | #ifndef _ASM_X86_PAGE_32_H |
2 | #define _ASM_X86_PAGE_32_H | |
3 | ||
4 | /* | |
5 | * This handles the memory map. | |
6 | * | |
7 | * A __PAGE_OFFSET of 0xC0000000 means that the kernel has | |
8 | * a virtual address space of one gigabyte, which limits the | |
9 | * amount of physical memory you can use to about 950MB. | |
10 | * | |
11 | * If you want more physical memory than this then see the CONFIG_HIGHMEM4G | |
12 | * and CONFIG_HIGHMEM64G options in the kernel configuration. | |
13 | */ | |
14 | #define __PAGE_OFFSET _AC(CONFIG_PAGE_OFFSET, UL) | |
15 | ||
16 | #ifdef CONFIG_X86_PAE | |
17 | #define __PHYSICAL_MASK_SHIFT 36 | |
18 | #define __VIRTUAL_MASK_SHIFT 32 | |
19 | #define PAGETABLE_LEVELS 3 | |
1da177e4 | 20 | |
1da177e4 | 21 | #ifndef __ASSEMBLY__ |
11b7c7dc JF |
22 | typedef u64 pteval_t; |
23 | typedef u64 pmdval_t; | |
24 | typedef u64 pudval_t; | |
25 | typedef u64 pgdval_t; | |
26 | typedef u64 pgprotval_t; | |
27 | typedef u64 phys_addr_t; | |
1da177e4 | 28 | |
c8e5393a JF |
29 | typedef union { |
30 | struct { | |
31 | unsigned long pte_low, pte_high; | |
32 | }; | |
33 | pteval_t pte; | |
34 | } pte_t; | |
11b7c7dc | 35 | #endif /* __ASSEMBLY__ |
1da177e4 | 36 | */ |
11b7c7dc JF |
37 | #else /* !CONFIG_X86_PAE */ |
38 | #define __PHYSICAL_MASK_SHIFT 32 | |
39 | #define __VIRTUAL_MASK_SHIFT 32 | |
40 | #define PAGETABLE_LEVELS 2 | |
41 | ||
42 | #ifndef __ASSEMBLY__ | |
43 | typedef unsigned long pteval_t; | |
44 | typedef unsigned long pmdval_t; | |
45 | typedef unsigned long pudval_t; | |
46 | typedef unsigned long pgdval_t; | |
47 | typedef unsigned long pgprotval_t; | |
48 | typedef unsigned long phys_addr_t; | |
3dc494e8 | 49 | |
c8e5393a | 50 | typedef union { pteval_t pte, pte_low; } pte_t; |
11b7c7dc JF |
51 | typedef pte_t boot_pte_t; |
52 | ||
2f569afd MS |
53 | typedef struct page *pgtable_t; |
54 | ||
11b7c7dc JF |
55 | #endif /* __ASSEMBLY__ */ |
56 | #endif /* CONFIG_X86_PAE */ | |
57 | ||
58 | #ifdef CONFIG_HUGETLB_PAGE | |
59 | #define HAVE_ARCH_HUGETLB_UNMAPPED_AREA | |
60 | #endif | |
1da177e4 | 61 | |
1da177e4 | 62 | #ifndef __ASSEMBLY__ |
11b7c7dc JF |
63 | #define __phys_addr(x) ((x)-PAGE_OFFSET) |
64 | #define __phys_reloc_hide(x) RELOC_HIDE((x), 0) | |
65 | ||
66 | #ifdef CONFIG_FLATMEM | |
67 | #define pfn_valid(pfn) ((pfn) < max_mapnr) | |
68 | #endif /* CONFIG_FLATMEM */ | |
69 | ||
70 | extern int nx_enabled; | |
71 | ||
72 | /* | |
73 | * This much address space is reserved for vmalloc() and iomap() | |
74 | * as well as fixmap mappings. | |
75 | */ | |
76 | extern unsigned int __VMALLOC_RESERVE; | |
77 | extern int sysctl_legacy_va_layout; | |
11b7c7dc JF |
78 | |
79 | #define VMALLOC_RESERVE ((unsigned long)__VMALLOC_RESERVE) | |
80 | #define MAXMEM (-__PAGE_OFFSET-__VMALLOC_RESERVE) | |
1da177e4 | 81 | |
11b7c7dc JF |
82 | #ifdef CONFIG_X86_USE_3DNOW |
83 | #include <asm/mmx.h> | |
e6e5494c | 84 | |
11b7c7dc JF |
85 | static inline void clear_page(void *page) |
86 | { | |
87 | mmx_clear_page(page); | |
88 | } | |
1da177e4 | 89 | |
11b7c7dc JF |
90 | static inline void copy_page(void *to, void *from) |
91 | { | |
92 | mmx_copy_page(to, from); | |
93 | } | |
94 | #else /* !CONFIG_X86_USE_3DNOW */ | |
95 | #include <linux/string.h> | |
1da177e4 | 96 | |
11b7c7dc JF |
97 | static inline void clear_page(void *page) |
98 | { | |
99 | memset(page, 0, PAGE_SIZE); | |
100 | } | |
fd4fd5aa | 101 | |
11b7c7dc JF |
102 | static inline void copy_page(void *to, void *from) |
103 | { | |
104 | memcpy(to, from, PAGE_SIZE); | |
105 | } | |
106 | #endif /* CONFIG_X86_3DNOW */ | |
107 | #endif /* !__ASSEMBLY__ */ | |
cd469e0c | 108 | |
11b7c7dc | 109 | #endif /* _ASM_X86_PAGE_32_H */ |