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1965aae3 PA |
1 | #ifndef _ASM_X86_PGTABLE_64_H |
2 | #define _ASM_X86_PGTABLE_64_H | |
1da177e4 | 3 | |
6df95fd7 | 4 | #include <linux/const.h> |
fb355149 JF |
5 | #include <asm/pgtable_64_types.h> |
6 | ||
9d291e78 VG |
7 | #ifndef __ASSEMBLY__ |
8 | ||
1da177e4 LT |
9 | /* |
10 | * This file contains the functions and defines necessary to modify and use | |
11 | * the x86-64 page table tree. | |
12 | */ | |
13 | #include <asm/processor.h> | |
1977f032 | 14 | #include <linux/bitops.h> |
1da177e4 | 15 | #include <linux/threads.h> |
1da177e4 LT |
16 | |
17 | extern pud_t level3_kernel_pgt[512]; | |
1da177e4 LT |
18 | extern pud_t level3_ident_pgt[512]; |
19 | extern pmd_t level2_kernel_pgt[512]; | |
084a2a4e JF |
20 | extern pmd_t level2_fixmap_pgt[512]; |
21 | extern pmd_t level2_ident_pgt[512]; | |
1da177e4 | 22 | extern pgd_t init_level4_pgt[]; |
1da177e4 | 23 | |
e3ebadd9 | 24 | #define swapper_pg_dir init_level4_pgt |
1da177e4 | 25 | |
1da177e4 | 26 | extern void paging_init(void); |
1da177e4 | 27 | |
7f94401e JP |
28 | #define pte_ERROR(e) \ |
29 | printk("%s:%d: bad pte %p(%016lx).\n", \ | |
30 | __FILE__, __LINE__, &(e), pte_val(e)) | |
31 | #define pmd_ERROR(e) \ | |
32 | printk("%s:%d: bad pmd %p(%016lx).\n", \ | |
33 | __FILE__, __LINE__, &(e), pmd_val(e)) | |
34 | #define pud_ERROR(e) \ | |
35 | printk("%s:%d: bad pud %p(%016lx).\n", \ | |
36 | __FILE__, __LINE__, &(e), pud_val(e)) | |
37 | #define pgd_ERROR(e) \ | |
38 | printk("%s:%d: bad pgd %p(%016lx).\n", \ | |
39 | __FILE__, __LINE__, &(e), pgd_val(e)) | |
1da177e4 | 40 | |
4891645e JF |
41 | struct mm_struct; |
42 | ||
0814e0ba EH |
43 | void set_pte_vaddr_pud(pud_t *pud_page, unsigned long vaddr, pte_t new_pte); |
44 | ||
45 | ||
4891645e JF |
46 | static inline void native_pte_clear(struct mm_struct *mm, unsigned long addr, |
47 | pte_t *ptep) | |
1da177e4 | 48 | { |
4891645e JF |
49 | *ptep = native_make_pte(0); |
50 | } | |
1da177e4 | 51 | |
4891645e | 52 | static inline void native_set_pte(pte_t *ptep, pte_t pte) |
1da177e4 | 53 | { |
4891645e JF |
54 | *ptep = pte; |
55 | } | |
1da177e4 | 56 | |
b65e6390 IM |
57 | static inline void native_set_pte_atomic(pte_t *ptep, pte_t pte) |
58 | { | |
59 | native_set_pte(ptep, pte); | |
60 | } | |
61 | ||
4891645e | 62 | static inline pte_t native_ptep_get_and_clear(pte_t *xp) |
1da177e4 | 63 | { |
4891645e JF |
64 | #ifdef CONFIG_SMP |
65 | return native_make_pte(xchg(&xp->pte, 0)); | |
66 | #else | |
7f94401e JP |
67 | /* native_local_ptep_get_and_clear, |
68 | but duplicated because of cyclic dependency */ | |
4891645e JF |
69 | pte_t ret = *xp; |
70 | native_pte_clear(NULL, 0, xp); | |
71 | return ret; | |
72 | #endif | |
1da177e4 LT |
73 | } |
74 | ||
4891645e | 75 | static inline void native_set_pmd(pmd_t *pmdp, pmd_t pmd) |
1da177e4 | 76 | { |
4891645e | 77 | *pmdp = pmd; |
1da177e4 LT |
78 | } |
79 | ||
4891645e | 80 | static inline void native_pmd_clear(pmd_t *pmd) |
1da177e4 | 81 | { |
4891645e JF |
82 | native_set_pmd(pmd, native_make_pmd(0)); |
83 | } | |
1da177e4 | 84 | |
4891645e | 85 | static inline void native_set_pud(pud_t *pudp, pud_t pud) |
1da177e4 | 86 | { |
4891645e | 87 | *pudp = pud; |
1da177e4 LT |
88 | } |
89 | ||
4891645e JF |
90 | static inline void native_pud_clear(pud_t *pud) |
91 | { | |
92 | native_set_pud(pud, native_make_pud(0)); | |
93 | } | |
61e06037 | 94 | |
4891645e JF |
95 | static inline void native_set_pgd(pgd_t *pgdp, pgd_t pgd) |
96 | { | |
97 | *pgdp = pgd; | |
98 | } | |
8c65b4a6 | 99 | |
7f94401e | 100 | static inline void native_pgd_clear(pgd_t *pgd) |
61e06037 | 101 | { |
4891645e | 102 | native_set_pgd(pgd, native_make_pgd(0)); |
61e06037 ZA |
103 | } |
104 | ||
1da177e4 LT |
105 | /* |
106 | * Conversion functions: convert a page and protection to a page entry, | |
107 | * and a page entry and page directory to the page they refer to. | |
108 | */ | |
109 | ||
1da177e4 LT |
110 | /* |
111 | * Level 4 access. | |
112 | */ | |
e00fc542 | 113 | static inline int pgd_large(pgd_t pgd) { return 0; } |
e7a9b0b3 | 114 | #define mk_kernel_pgd(address) __pgd((address) | _KERNPG_TABLE) |
1da177e4 LT |
115 | |
116 | /* PUD - Level3 access */ | |
1da177e4 | 117 | |
1da177e4 | 118 | /* PMD - Level 2 access */ |
7f94401e JP |
119 | #define pte_to_pgoff(pte) ((pte_val((pte)) & PHYSICAL_PAGE_MASK) >> PAGE_SHIFT) |
120 | #define pgoff_to_pte(off) ((pte_t) { .pte = ((off) << PAGE_SHIFT) | \ | |
121 | _PAGE_FILE }) | |
1da177e4 LT |
122 | #define PTE_FILE_MAX_BITS __PHYSICAL_MASK_SHIFT |
123 | ||
124 | /* PTE - Level 1 access. */ | |
125 | ||
1da177e4 | 126 | /* x86-64 always has all page tables mapped. */ |
7f94401e JP |
127 | #define pte_offset_map(dir, address) pte_offset_kernel((dir), (address)) |
128 | #define pte_offset_map_nested(dir, address) pte_offset_kernel((dir), (address)) | |
4e60c86b AK |
129 | #define pte_unmap(pte) ((void)(pte))/* NOP */ |
130 | #define pte_unmap_nested(pte) ((void)(pte)) /* NOP */ | |
1da177e4 | 131 | |
4b3073e1 | 132 | #define update_mmu_cache(vma, address, ptep) do { } while (0) |
1da177e4 | 133 | |
1da177e4 | 134 | /* Encode and de-code a swap entry */ |
1796316a JB |
135 | #if _PAGE_BIT_FILE < _PAGE_BIT_PROTNONE |
136 | #define SWP_TYPE_BITS (_PAGE_BIT_FILE - _PAGE_BIT_PRESENT - 1) | |
137 | #define SWP_OFFSET_SHIFT (_PAGE_BIT_PROTNONE + 1) | |
138 | #else | |
139 | #define SWP_TYPE_BITS (_PAGE_BIT_PROTNONE - _PAGE_BIT_PRESENT - 1) | |
140 | #define SWP_OFFSET_SHIFT (_PAGE_BIT_FILE + 1) | |
141 | #endif | |
142 | ||
143 | #define MAX_SWAPFILES_CHECK() BUILD_BUG_ON(MAX_SWAPFILES_SHIFT > SWP_TYPE_BITS) | |
144 | ||
145 | #define __swp_type(x) (((x).val >> (_PAGE_BIT_PRESENT + 1)) \ | |
146 | & ((1U << SWP_TYPE_BITS) - 1)) | |
147 | #define __swp_offset(x) ((x).val >> SWP_OFFSET_SHIFT) | |
148 | #define __swp_entry(type, offset) ((swp_entry_t) { \ | |
149 | ((type) << (_PAGE_BIT_PRESENT + 1)) \ | |
150 | | ((offset) << SWP_OFFSET_SHIFT) }) | |
7f94401e | 151 | #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val((pte)) }) |
c8e5393a | 152 | #define __swp_entry_to_pte(x) ((pte_t) { .pte = (x).val }) |
1da177e4 | 153 | |
7f94401e | 154 | extern int kern_addr_valid(unsigned long addr); |
31eedd82 | 155 | extern void cleanup_highmap(void); |
1da177e4 | 156 | |
1da177e4 | 157 | #define HAVE_ARCH_UNMAPPED_AREA |
cc503c1b | 158 | #define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN |
1da177e4 LT |
159 | |
160 | #define pgtable_cache_init() do { } while (0) | |
da8f153e | 161 | #define check_pgt_cache() do { } while (0) |
1da177e4 LT |
162 | |
163 | #define PAGE_AGP PAGE_KERNEL_NOCACHE | |
164 | #define HAVE_PAGE_AGP 1 | |
165 | ||
166 | /* fs/proc/kcore.c */ | |
167 | #define kc_vaddr_to_offset(v) ((v) & __VIRTUAL_MASK) | |
9063c61f | 168 | #define kc_offset_to_vaddr(o) ((o) | ~__VIRTUAL_MASK) |
1da177e4 | 169 | |
1da177e4 | 170 | #define __HAVE_ARCH_PTE_SAME |
9d291e78 | 171 | #endif /* !__ASSEMBLY__ */ |
1da177e4 | 172 | |
1965aae3 | 173 | #endif /* _ASM_X86_PGTABLE_64_H */ |