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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]; | |
0b5a5063 | 22 | extern pte_t level1_fixmap_pgt[512]; |
1da177e4 | 23 | extern pgd_t init_level4_pgt[]; |
1da177e4 | 24 | |
e3ebadd9 | 25 | #define swapper_pg_dir init_level4_pgt |
1da177e4 | 26 | |
1da177e4 | 27 | extern void paging_init(void); |
1da177e4 | 28 | |
7f94401e | 29 | #define pte_ERROR(e) \ |
c767a54b | 30 | pr_err("%s:%d: bad pte %p(%016lx)\n", \ |
7f94401e JP |
31 | __FILE__, __LINE__, &(e), pte_val(e)) |
32 | #define pmd_ERROR(e) \ | |
c767a54b | 33 | pr_err("%s:%d: bad pmd %p(%016lx)\n", \ |
7f94401e JP |
34 | __FILE__, __LINE__, &(e), pmd_val(e)) |
35 | #define pud_ERROR(e) \ | |
c767a54b | 36 | pr_err("%s:%d: bad pud %p(%016lx)\n", \ |
7f94401e JP |
37 | __FILE__, __LINE__, &(e), pud_val(e)) |
38 | #define pgd_ERROR(e) \ | |
c767a54b | 39 | pr_err("%s:%d: bad pgd %p(%016lx)\n", \ |
7f94401e | 40 | __FILE__, __LINE__, &(e), pgd_val(e)) |
1da177e4 | 41 | |
4891645e JF |
42 | struct mm_struct; |
43 | ||
0814e0ba EH |
44 | void set_pte_vaddr_pud(pud_t *pud_page, unsigned long vaddr, pte_t new_pte); |
45 | ||
46 | ||
4891645e JF |
47 | static inline void native_pte_clear(struct mm_struct *mm, unsigned long addr, |
48 | pte_t *ptep) | |
1da177e4 | 49 | { |
4891645e JF |
50 | *ptep = native_make_pte(0); |
51 | } | |
1da177e4 | 52 | |
4891645e | 53 | static inline void native_set_pte(pte_t *ptep, pte_t pte) |
1da177e4 | 54 | { |
4891645e JF |
55 | *ptep = pte; |
56 | } | |
1da177e4 | 57 | |
b65e6390 IM |
58 | static inline void native_set_pte_atomic(pte_t *ptep, pte_t pte) |
59 | { | |
60 | native_set_pte(ptep, pte); | |
61 | } | |
62 | ||
db3eb96f AA |
63 | static inline void native_set_pmd(pmd_t *pmdp, pmd_t pmd) |
64 | { | |
65 | *pmdp = pmd; | |
66 | } | |
67 | ||
68 | static inline void native_pmd_clear(pmd_t *pmd) | |
69 | { | |
70 | native_set_pmd(pmd, native_make_pmd(0)); | |
71 | } | |
72 | ||
4891645e | 73 | static inline pte_t native_ptep_get_and_clear(pte_t *xp) |
1da177e4 | 74 | { |
4891645e JF |
75 | #ifdef CONFIG_SMP |
76 | return native_make_pte(xchg(&xp->pte, 0)); | |
77 | #else | |
7f94401e JP |
78 | /* native_local_ptep_get_and_clear, |
79 | but duplicated because of cyclic dependency */ | |
4891645e JF |
80 | pte_t ret = *xp; |
81 | native_pte_clear(NULL, 0, xp); | |
82 | return ret; | |
83 | #endif | |
1da177e4 LT |
84 | } |
85 | ||
db3eb96f | 86 | static inline pmd_t native_pmdp_get_and_clear(pmd_t *xp) |
1da177e4 | 87 | { |
db3eb96f AA |
88 | #ifdef CONFIG_SMP |
89 | return native_make_pmd(xchg(&xp->pmd, 0)); | |
90 | #else | |
91 | /* native_local_pmdp_get_and_clear, | |
92 | but duplicated because of cyclic dependency */ | |
93 | pmd_t ret = *xp; | |
94 | native_pmd_clear(xp); | |
95 | return ret; | |
96 | #endif | |
4891645e | 97 | } |
1da177e4 | 98 | |
4891645e | 99 | static inline void native_set_pud(pud_t *pudp, pud_t pud) |
1da177e4 | 100 | { |
4891645e | 101 | *pudp = pud; |
1da177e4 LT |
102 | } |
103 | ||
4891645e JF |
104 | static inline void native_pud_clear(pud_t *pud) |
105 | { | |
106 | native_set_pud(pud, native_make_pud(0)); | |
107 | } | |
61e06037 | 108 | |
4891645e JF |
109 | static inline void native_set_pgd(pgd_t *pgdp, pgd_t pgd) |
110 | { | |
111 | *pgdp = pgd; | |
112 | } | |
8c65b4a6 | 113 | |
7f94401e | 114 | static inline void native_pgd_clear(pgd_t *pgd) |
61e06037 | 115 | { |
4891645e | 116 | native_set_pgd(pgd, native_make_pgd(0)); |
61e06037 ZA |
117 | } |
118 | ||
9661d5bc YI |
119 | extern void sync_global_pgds(unsigned long start, unsigned long end, |
120 | int removed); | |
6afb5157 | 121 | |
1da177e4 LT |
122 | /* |
123 | * Conversion functions: convert a page and protection to a page entry, | |
124 | * and a page entry and page directory to the page they refer to. | |
125 | */ | |
126 | ||
1da177e4 LT |
127 | /* |
128 | * Level 4 access. | |
129 | */ | |
e00fc542 | 130 | static inline int pgd_large(pgd_t pgd) { return 0; } |
e7a9b0b3 | 131 | #define mk_kernel_pgd(address) __pgd((address) | _KERNPG_TABLE) |
1da177e4 LT |
132 | |
133 | /* PUD - Level3 access */ | |
1da177e4 | 134 | |
1da177e4 | 135 | /* PMD - Level 2 access */ |
7f94401e JP |
136 | #define pte_to_pgoff(pte) ((pte_val((pte)) & PHYSICAL_PAGE_MASK) >> PAGE_SHIFT) |
137 | #define pgoff_to_pte(off) ((pte_t) { .pte = ((off) << PAGE_SHIFT) | \ | |
138 | _PAGE_FILE }) | |
1da177e4 LT |
139 | #define PTE_FILE_MAX_BITS __PHYSICAL_MASK_SHIFT |
140 | ||
141 | /* PTE - Level 1 access. */ | |
142 | ||
1da177e4 | 143 | /* x86-64 always has all page tables mapped. */ |
7f94401e | 144 | #define pte_offset_map(dir, address) pte_offset_kernel((dir), (address)) |
4e60c86b | 145 | #define pte_unmap(pte) ((void)(pte))/* NOP */ |
1da177e4 | 146 | |
1da177e4 | 147 | /* Encode and de-code a swap entry */ |
1796316a | 148 | #define SWP_TYPE_BITS (_PAGE_BIT_FILE - _PAGE_BIT_PRESENT - 1) |
c46a7c81 MG |
149 | #ifdef CONFIG_NUMA_BALANCING |
150 | /* Automatic NUMA balancing needs to be distinguishable from swap entries */ | |
151 | #define SWP_OFFSET_SHIFT (_PAGE_BIT_PROTNONE + 2) | |
152 | #else | |
1796316a | 153 | #define SWP_OFFSET_SHIFT (_PAGE_BIT_PROTNONE + 1) |
c46a7c81 | 154 | #endif |
1796316a JB |
155 | |
156 | #define MAX_SWAPFILES_CHECK() BUILD_BUG_ON(MAX_SWAPFILES_SHIFT > SWP_TYPE_BITS) | |
157 | ||
158 | #define __swp_type(x) (((x).val >> (_PAGE_BIT_PRESENT + 1)) \ | |
159 | & ((1U << SWP_TYPE_BITS) - 1)) | |
160 | #define __swp_offset(x) ((x).val >> SWP_OFFSET_SHIFT) | |
161 | #define __swp_entry(type, offset) ((swp_entry_t) { \ | |
162 | ((type) << (_PAGE_BIT_PRESENT + 1)) \ | |
163 | | ((offset) << SWP_OFFSET_SHIFT) }) | |
7f94401e | 164 | #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val((pte)) }) |
c8e5393a | 165 | #define __swp_entry_to_pte(x) ((pte_t) { .pte = (x).val }) |
1da177e4 | 166 | |
7f94401e | 167 | extern int kern_addr_valid(unsigned long addr); |
31eedd82 | 168 | extern void cleanup_highmap(void); |
1da177e4 | 169 | |
1da177e4 | 170 | #define HAVE_ARCH_UNMAPPED_AREA |
cc503c1b | 171 | #define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN |
1da177e4 LT |
172 | |
173 | #define pgtable_cache_init() do { } while (0) | |
da8f153e | 174 | #define check_pgt_cache() do { } while (0) |
1da177e4 LT |
175 | |
176 | #define PAGE_AGP PAGE_KERNEL_NOCACHE | |
177 | #define HAVE_PAGE_AGP 1 | |
178 | ||
179 | /* fs/proc/kcore.c */ | |
180 | #define kc_vaddr_to_offset(v) ((v) & __VIRTUAL_MASK) | |
9063c61f | 181 | #define kc_offset_to_vaddr(o) ((o) | ~__VIRTUAL_MASK) |
1da177e4 | 182 | |
1da177e4 | 183 | #define __HAVE_ARCH_PTE_SAME |
5f6e8da7 | 184 | |
fb50b020 AD |
185 | #define vmemmap ((struct page *)VMEMMAP_START) |
186 | ||
187 | extern void init_extra_mapping_uc(unsigned long phys, unsigned long size); | |
188 | extern void init_extra_mapping_wb(unsigned long phys, unsigned long size); | |
189 | ||
9d291e78 | 190 | #endif /* !__ASSEMBLY__ */ |
1da177e4 | 191 | |
1965aae3 | 192 | #endif /* _ASM_X86_PGTABLE_64_H */ |