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1965aae3 PA |
1 | #ifndef _ASM_X86_PAGE_32_H |
2 | #define _ASM_X86_PAGE_32_H | |
11b7c7dc JF |
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 | ||
b84200b3 CL |
16 | #ifdef CONFIG_4KSTACKS |
17 | #define THREAD_ORDER 0 | |
18 | #else | |
19 | #define THREAD_ORDER 1 | |
20 | #endif | |
21 | #define THREAD_SIZE (PAGE_SIZE << THREAD_ORDER) | |
22 | ||
699d2937 AH |
23 | #define STACKFAULT_STACK 0 |
24 | #define DOUBLEFAULT_STACK 1 | |
25 | #define NMI_STACK 0 | |
26 | #define DEBUG_STACK 0 | |
27 | #define MCE_STACK 0 | |
28 | #define N_EXCEPTION_STACKS 1 | |
b84200b3 | 29 | |
11b7c7dc | 30 | #ifdef CONFIG_X86_PAE |
ad524d46 JF |
31 | /* 44=32+12, the limit we can fit into an unsigned long pfn */ |
32 | #define __PHYSICAL_MASK_SHIFT 44 | |
11b7c7dc JF |
33 | #define __VIRTUAL_MASK_SHIFT 32 |
34 | #define PAGETABLE_LEVELS 3 | |
1da177e4 | 35 | |
1da177e4 | 36 | #ifndef __ASSEMBLY__ |
11b7c7dc JF |
37 | typedef u64 pteval_t; |
38 | typedef u64 pmdval_t; | |
39 | typedef u64 pudval_t; | |
40 | typedef u64 pgdval_t; | |
41 | typedef u64 pgprotval_t; | |
1da177e4 | 42 | |
c8e5393a JF |
43 | typedef union { |
44 | struct { | |
45 | unsigned long pte_low, pte_high; | |
46 | }; | |
47 | pteval_t pte; | |
48 | } pte_t; | |
11b7c7dc | 49 | #endif /* __ASSEMBLY__ |
1da177e4 | 50 | */ |
11b7c7dc JF |
51 | #else /* !CONFIG_X86_PAE */ |
52 | #define __PHYSICAL_MASK_SHIFT 32 | |
53 | #define __VIRTUAL_MASK_SHIFT 32 | |
54 | #define PAGETABLE_LEVELS 2 | |
55 | ||
56 | #ifndef __ASSEMBLY__ | |
57 | typedef unsigned long pteval_t; | |
58 | typedef unsigned long pmdval_t; | |
59 | typedef unsigned long pudval_t; | |
60 | typedef unsigned long pgdval_t; | |
61 | typedef unsigned long pgprotval_t; | |
3dc494e8 | 62 | |
095d1c4e JP |
63 | typedef union { |
64 | pteval_t pte; | |
65 | pteval_t pte_low; | |
66 | } pte_t; | |
11b7c7dc | 67 | |
11b7c7dc JF |
68 | #endif /* __ASSEMBLY__ */ |
69 | #endif /* CONFIG_X86_PAE */ | |
70 | ||
3bf8f5a9 IM |
71 | #ifndef __ASSEMBLY__ |
72 | typedef struct page *pgtable_t; | |
73 | #endif | |
74 | ||
11b7c7dc JF |
75 | #ifdef CONFIG_HUGETLB_PAGE |
76 | #define HAVE_ARCH_HUGETLB_UNMAPPED_AREA | |
77 | #endif | |
1da177e4 | 78 | |
1da177e4 | 79 | #ifndef __ASSEMBLY__ |
af5c2bd1 | 80 | #define __phys_addr_nodebug(x) ((x) - PAGE_OFFSET) |
a1bf9631 | 81 | #ifdef CONFIG_DEBUG_VIRTUAL |
59ea7463 | 82 | extern unsigned long __phys_addr(unsigned long); |
a1bf9631 | 83 | #else |
af5c2bd1 | 84 | #define __phys_addr(x) __phys_addr_nodebug(x) |
a1bf9631 | 85 | #endif |
11b7c7dc JF |
86 | #define __phys_reloc_hide(x) RELOC_HIDE((x), 0) |
87 | ||
88 | #ifdef CONFIG_FLATMEM | |
89 | #define pfn_valid(pfn) ((pfn) < max_mapnr) | |
90 | #endif /* CONFIG_FLATMEM */ | |
91 | ||
92 | extern int nx_enabled; | |
93 | ||
94 | /* | |
95 | * This much address space is reserved for vmalloc() and iomap() | |
96 | * as well as fixmap mappings. | |
97 | */ | |
98 | extern unsigned int __VMALLOC_RESERVE; | |
99 | extern int sysctl_legacy_va_layout; | |
11b7c7dc | 100 | |
2ec65f8b | 101 | extern void find_low_pfn_range(void); |
4e29684c YL |
102 | extern unsigned long init_memory_mapping(unsigned long start, |
103 | unsigned long end); | |
2ec65f8b | 104 | extern void initmem_init(unsigned long, unsigned long); |
a80495ec | 105 | extern void free_initmem(void); |
b2ac82a0 YL |
106 | extern void setup_bootmem_allocator(void); |
107 | ||
108 | ||
11b7c7dc JF |
109 | #ifdef CONFIG_X86_USE_3DNOW |
110 | #include <asm/mmx.h> | |
e6e5494c | 111 | |
11b7c7dc JF |
112 | static inline void clear_page(void *page) |
113 | { | |
114 | mmx_clear_page(page); | |
115 | } | |
1da177e4 | 116 | |
11b7c7dc JF |
117 | static inline void copy_page(void *to, void *from) |
118 | { | |
119 | mmx_copy_page(to, from); | |
120 | } | |
121 | #else /* !CONFIG_X86_USE_3DNOW */ | |
122 | #include <linux/string.h> | |
1da177e4 | 123 | |
11b7c7dc JF |
124 | static inline void clear_page(void *page) |
125 | { | |
126 | memset(page, 0, PAGE_SIZE); | |
127 | } | |
fd4fd5aa | 128 | |
11b7c7dc JF |
129 | static inline void copy_page(void *to, void *from) |
130 | { | |
131 | memcpy(to, from, PAGE_SIZE); | |
132 | } | |
133 | #endif /* CONFIG_X86_3DNOW */ | |
134 | #endif /* !__ASSEMBLY__ */ | |
cd469e0c | 135 | |
1965aae3 | 136 | #endif /* _ASM_X86_PAGE_32_H */ |