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1da177e4 LT |
1 | #ifndef _X86_64_PGTABLE_H |
2 | #define _X86_64_PGTABLE_H | |
3 | ||
9d291e78 VG |
4 | #include <asm/const.h> |
5 | #ifndef __ASSEMBLY__ | |
6 | ||
1da177e4 LT |
7 | /* |
8 | * This file contains the functions and defines necessary to modify and use | |
9 | * the x86-64 page table tree. | |
10 | */ | |
11 | #include <asm/processor.h> | |
1da177e4 LT |
12 | #include <asm/bitops.h> |
13 | #include <linux/threads.h> | |
14 | #include <asm/pda.h> | |
15 | ||
16 | extern pud_t level3_kernel_pgt[512]; | |
1da177e4 LT |
17 | extern pud_t level3_ident_pgt[512]; |
18 | extern pmd_t level2_kernel_pgt[512]; | |
19 | extern pgd_t init_level4_pgt[]; | |
20 | extern unsigned long __supported_pte_mask; | |
21 | ||
22 | #define swapper_pg_dir init_level4_pgt | |
23 | ||
1da177e4 LT |
24 | extern void paging_init(void); |
25 | extern void clear_kernel_mapping(unsigned long addr, unsigned long size); | |
26 | ||
1da177e4 LT |
27 | /* |
28 | * ZERO_PAGE is a global shared page that is always zero: used | |
29 | * for zero-mapped memory areas etc.. | |
30 | */ | |
31 | extern unsigned long empty_zero_page[PAGE_SIZE/sizeof(unsigned long)]; | |
32 | #define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page)) | |
33 | ||
9d291e78 VG |
34 | #endif /* !__ASSEMBLY__ */ |
35 | ||
1da177e4 LT |
36 | /* |
37 | * PGDIR_SHIFT determines what a top-level page table entry can map | |
38 | */ | |
39 | #define PGDIR_SHIFT 39 | |
40 | #define PTRS_PER_PGD 512 | |
41 | ||
42 | /* | |
43 | * 3rd level page | |
44 | */ | |
45 | #define PUD_SHIFT 30 | |
46 | #define PTRS_PER_PUD 512 | |
47 | ||
48 | /* | |
49 | * PMD_SHIFT determines the size of the area a middle-level | |
50 | * page table can map | |
51 | */ | |
52 | #define PMD_SHIFT 21 | |
53 | #define PTRS_PER_PMD 512 | |
54 | ||
55 | /* | |
56 | * entries per page directory level | |
57 | */ | |
58 | #define PTRS_PER_PTE 512 | |
59 | ||
9d291e78 VG |
60 | #ifndef __ASSEMBLY__ |
61 | ||
1da177e4 LT |
62 | #define pte_ERROR(e) \ |
63 | printk("%s:%d: bad pte %p(%016lx).\n", __FILE__, __LINE__, &(e), pte_val(e)) | |
64 | #define pmd_ERROR(e) \ | |
65 | printk("%s:%d: bad pmd %p(%016lx).\n", __FILE__, __LINE__, &(e), pmd_val(e)) | |
66 | #define pud_ERROR(e) \ | |
67 | printk("%s:%d: bad pud %p(%016lx).\n", __FILE__, __LINE__, &(e), pud_val(e)) | |
68 | #define pgd_ERROR(e) \ | |
69 | printk("%s:%d: bad pgd %p(%016lx).\n", __FILE__, __LINE__, &(e), pgd_val(e)) | |
70 | ||
71 | #define pgd_none(x) (!pgd_val(x)) | |
72 | #define pud_none(x) (!pud_val(x)) | |
73 | ||
74 | static inline void set_pte(pte_t *dst, pte_t val) | |
75 | { | |
76 | pte_val(*dst) = pte_val(val); | |
77 | } | |
78 | #define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval) | |
79 | ||
80 | static inline void set_pmd(pmd_t *dst, pmd_t val) | |
81 | { | |
82 | pmd_val(*dst) = pmd_val(val); | |
83 | } | |
84 | ||
85 | static inline void set_pud(pud_t *dst, pud_t val) | |
86 | { | |
87 | pud_val(*dst) = pud_val(val); | |
88 | } | |
89 | ||
9c0aa0f9 | 90 | static inline void pud_clear (pud_t *pud) |
1da177e4 LT |
91 | { |
92 | set_pud(pud, __pud(0)); | |
93 | } | |
94 | ||
95 | static inline void set_pgd(pgd_t *dst, pgd_t val) | |
96 | { | |
97 | pgd_val(*dst) = pgd_val(val); | |
98 | } | |
99 | ||
9c0aa0f9 | 100 | static inline void pgd_clear (pgd_t * pgd) |
1da177e4 LT |
101 | { |
102 | set_pgd(pgd, __pgd(0)); | |
103 | } | |
104 | ||
1da177e4 | 105 | #define ptep_get_and_clear(mm,addr,xp) __pte(xchg(&(xp)->pte, 0)) |
61e06037 | 106 | |
8c65b4a6 TS |
107 | struct mm_struct; |
108 | ||
61e06037 ZA |
109 | static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm, unsigned long addr, pte_t *ptep, int full) |
110 | { | |
111 | pte_t pte; | |
112 | if (full) { | |
113 | pte = *ptep; | |
114 | *ptep = __pte(0); | |
115 | } else { | |
116 | pte = ptep_get_and_clear(mm, addr, ptep); | |
117 | } | |
118 | return pte; | |
119 | } | |
120 | ||
1da177e4 LT |
121 | #define pte_same(a, b) ((a).pte == (b).pte) |
122 | ||
c728252c AV |
123 | #define pte_pgprot(a) (__pgprot((a).pte & ~PHYSICAL_PAGE_MASK)) |
124 | ||
9d291e78 VG |
125 | #endif /* !__ASSEMBLY__ */ |
126 | ||
127 | #define PMD_SIZE (_AC(1,UL) << PMD_SHIFT) | |
1da177e4 | 128 | #define PMD_MASK (~(PMD_SIZE-1)) |
9d291e78 | 129 | #define PUD_SIZE (_AC(1,UL) << PUD_SHIFT) |
1da177e4 | 130 | #define PUD_MASK (~(PUD_SIZE-1)) |
9d291e78 | 131 | #define PGDIR_SIZE (_AC(1,UL) << PGDIR_SHIFT) |
1da177e4 LT |
132 | #define PGDIR_MASK (~(PGDIR_SIZE-1)) |
133 | ||
f83f2b5f | 134 | #define USER_PTRS_PER_PGD ((TASK_SIZE-1)/PGDIR_SIZE+1) |
d455a369 | 135 | #define FIRST_USER_ADDRESS 0 |
1da177e4 | 136 | |
9d291e78 VG |
137 | #define MAXMEM 0x3fffffffffff |
138 | #define VMALLOC_START 0xffffc20000000000 | |
139 | #define VMALLOC_END 0xffffe1ffffffffff | |
140 | #define MODULES_VADDR 0xffffffff88000000 | |
141 | #define MODULES_END 0xfffffffffff00000 | |
1da177e4 LT |
142 | #define MODULES_LEN (MODULES_END - MODULES_VADDR) |
143 | ||
144 | #define _PAGE_BIT_PRESENT 0 | |
145 | #define _PAGE_BIT_RW 1 | |
146 | #define _PAGE_BIT_USER 2 | |
147 | #define _PAGE_BIT_PWT 3 | |
148 | #define _PAGE_BIT_PCD 4 | |
149 | #define _PAGE_BIT_ACCESSED 5 | |
150 | #define _PAGE_BIT_DIRTY 6 | |
151 | #define _PAGE_BIT_PSE 7 /* 4 MB (or 2MB) page */ | |
152 | #define _PAGE_BIT_GLOBAL 8 /* Global TLB entry PPro+ */ | |
153 | #define _PAGE_BIT_NX 63 /* No execute: only valid after cpuid check */ | |
154 | ||
155 | #define _PAGE_PRESENT 0x001 | |
156 | #define _PAGE_RW 0x002 | |
157 | #define _PAGE_USER 0x004 | |
158 | #define _PAGE_PWT 0x008 | |
159 | #define _PAGE_PCD 0x010 | |
160 | #define _PAGE_ACCESSED 0x020 | |
161 | #define _PAGE_DIRTY 0x040 | |
162 | #define _PAGE_PSE 0x080 /* 2MB page */ | |
9b4ee40e | 163 | #define _PAGE_FILE 0x040 /* nonlinear file mapping, saved PTE; unset:swap */ |
1da177e4 LT |
164 | #define _PAGE_GLOBAL 0x100 /* Global TLB entry */ |
165 | ||
166 | #define _PAGE_PROTNONE 0x080 /* If not present */ | |
9d291e78 | 167 | #define _PAGE_NX (_AC(1,UL)<<_PAGE_BIT_NX) |
1da177e4 LT |
168 | |
169 | #define _PAGE_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED | _PAGE_DIRTY) | |
170 | #define _KERNPG_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED | _PAGE_DIRTY) | |
171 | ||
172 | #define _PAGE_CHG_MASK (PTE_MASK | _PAGE_ACCESSED | _PAGE_DIRTY) | |
173 | ||
174 | #define PAGE_NONE __pgprot(_PAGE_PROTNONE | _PAGE_ACCESSED) | |
175 | #define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED | _PAGE_NX) | |
176 | #define PAGE_SHARED_EXEC __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED) | |
177 | #define PAGE_COPY_NOEXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED | _PAGE_NX) | |
178 | #define PAGE_COPY PAGE_COPY_NOEXEC | |
179 | #define PAGE_COPY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED) | |
180 | #define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED | _PAGE_NX) | |
181 | #define PAGE_READONLY_EXEC __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED) | |
182 | #define __PAGE_KERNEL \ | |
183 | (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_NX) | |
184 | #define __PAGE_KERNEL_EXEC \ | |
185 | (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED) | |
186 | #define __PAGE_KERNEL_NOCACHE \ | |
187 | (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_PCD | _PAGE_ACCESSED | _PAGE_NX) | |
188 | #define __PAGE_KERNEL_RO \ | |
189 | (_PAGE_PRESENT | _PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_NX) | |
190 | #define __PAGE_KERNEL_VSYSCALL \ | |
191 | (_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED) | |
192 | #define __PAGE_KERNEL_VSYSCALL_NOCACHE \ | |
193 | (_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED | _PAGE_PCD) | |
194 | #define __PAGE_KERNEL_LARGE \ | |
195 | (__PAGE_KERNEL | _PAGE_PSE) | |
8bf27556 EB |
196 | #define __PAGE_KERNEL_LARGE_EXEC \ |
197 | (__PAGE_KERNEL_EXEC | _PAGE_PSE) | |
1da177e4 LT |
198 | |
199 | #define MAKE_GLOBAL(x) __pgprot((x) | _PAGE_GLOBAL) | |
200 | ||
201 | #define PAGE_KERNEL MAKE_GLOBAL(__PAGE_KERNEL) | |
202 | #define PAGE_KERNEL_EXEC MAKE_GLOBAL(__PAGE_KERNEL_EXEC) | |
203 | #define PAGE_KERNEL_RO MAKE_GLOBAL(__PAGE_KERNEL_RO) | |
204 | #define PAGE_KERNEL_NOCACHE MAKE_GLOBAL(__PAGE_KERNEL_NOCACHE) | |
205 | #define PAGE_KERNEL_VSYSCALL32 __pgprot(__PAGE_KERNEL_VSYSCALL) | |
206 | #define PAGE_KERNEL_VSYSCALL MAKE_GLOBAL(__PAGE_KERNEL_VSYSCALL) | |
207 | #define PAGE_KERNEL_LARGE MAKE_GLOBAL(__PAGE_KERNEL_LARGE) | |
208 | #define PAGE_KERNEL_VSYSCALL_NOCACHE MAKE_GLOBAL(__PAGE_KERNEL_VSYSCALL_NOCACHE) | |
209 | ||
210 | /* xwr */ | |
211 | #define __P000 PAGE_NONE | |
212 | #define __P001 PAGE_READONLY | |
213 | #define __P010 PAGE_COPY | |
214 | #define __P011 PAGE_COPY | |
215 | #define __P100 PAGE_READONLY_EXEC | |
216 | #define __P101 PAGE_READONLY_EXEC | |
217 | #define __P110 PAGE_COPY_EXEC | |
218 | #define __P111 PAGE_COPY_EXEC | |
219 | ||
220 | #define __S000 PAGE_NONE | |
221 | #define __S001 PAGE_READONLY | |
222 | #define __S010 PAGE_SHARED | |
223 | #define __S011 PAGE_SHARED | |
224 | #define __S100 PAGE_READONLY_EXEC | |
225 | #define __S101 PAGE_READONLY_EXEC | |
226 | #define __S110 PAGE_SHARED_EXEC | |
227 | #define __S111 PAGE_SHARED_EXEC | |
228 | ||
9d291e78 VG |
229 | #ifndef __ASSEMBLY__ |
230 | ||
eab724e5 JB |
231 | static inline unsigned long pgd_bad(pgd_t pgd) |
232 | { | |
233 | return pgd_val(pgd) & ~(PTE_MASK | _KERNPG_TABLE | _PAGE_USER); | |
234 | } | |
1da177e4 LT |
235 | |
236 | static inline unsigned long pud_bad(pud_t pud) | |
237 | { | |
eab724e5 JB |
238 | return pud_val(pud) & ~(PTE_MASK | _KERNPG_TABLE | _PAGE_USER); |
239 | } | |
240 | ||
241 | static inline unsigned long pmd_bad(pmd_t pmd) | |
242 | { | |
243 | return pmd_val(pmd) & ~(PTE_MASK | _KERNPG_TABLE | _PAGE_USER); | |
1da177e4 LT |
244 | } |
245 | ||
246 | #define pte_none(x) (!pte_val(x)) | |
247 | #define pte_present(x) (pte_val(x) & (_PAGE_PRESENT | _PAGE_PROTNONE)) | |
248 | #define pte_clear(mm,addr,xp) do { set_pte_at(mm, addr, xp, __pte(0)); } while (0) | |
249 | ||
250 | #define pages_to_mb(x) ((x) >> (20-PAGE_SHIFT)) /* FIXME: is this | |
251 | right? */ | |
252 | #define pte_page(x) pfn_to_page(pte_pfn(x)) | |
6b75aeed | 253 | #define pte_pfn(x) ((pte_val(x) & __PHYSICAL_MASK) >> PAGE_SHIFT) |
1da177e4 LT |
254 | |
255 | static inline pte_t pfn_pte(unsigned long page_nr, pgprot_t pgprot) | |
256 | { | |
257 | pte_t pte; | |
258 | pte_val(pte) = (page_nr << PAGE_SHIFT); | |
259 | pte_val(pte) |= pgprot_val(pgprot); | |
260 | pte_val(pte) &= __supported_pte_mask; | |
261 | return pte; | |
262 | } | |
263 | ||
264 | /* | |
265 | * The following only work if pte_present() is true. | |
266 | * Undefined behaviour if not.. | |
267 | */ | |
32e51a8c | 268 | #define __LARGE_PTE (_PAGE_PSE|_PAGE_PRESENT) |
1da177e4 | 269 | static inline int pte_user(pte_t pte) { return pte_val(pte) & _PAGE_USER; } |
4839057c | 270 | static inline int pte_read(pte_t pte) { return pte_val(pte) & _PAGE_USER; } |
df992848 | 271 | static inline int pte_exec(pte_t pte) { return !(pte_val(pte) & _PAGE_NX); } |
4839057c AB |
272 | static inline int pte_dirty(pte_t pte) { return pte_val(pte) & _PAGE_DIRTY; } |
273 | static inline int pte_young(pte_t pte) { return pte_val(pte) & _PAGE_ACCESSED; } | |
274 | static inline int pte_write(pte_t pte) { return pte_val(pte) & _PAGE_RW; } | |
1da177e4 | 275 | static inline int pte_file(pte_t pte) { return pte_val(pte) & _PAGE_FILE; } |
8f860591 | 276 | static inline int pte_huge(pte_t pte) { return pte_val(pte) & _PAGE_PSE; } |
1da177e4 | 277 | |
4839057c AB |
278 | static inline pte_t pte_rdprotect(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) & ~_PAGE_USER)); return pte; } |
279 | static inline pte_t pte_exprotect(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) & ~_PAGE_USER)); return pte; } | |
280 | static inline pte_t pte_mkclean(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) & ~_PAGE_DIRTY)); return pte; } | |
281 | static inline pte_t pte_mkold(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) & ~_PAGE_ACCESSED)); return pte; } | |
282 | static inline pte_t pte_wrprotect(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) & ~_PAGE_RW)); return pte; } | |
283 | static inline pte_t pte_mkread(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) | _PAGE_USER)); return pte; } | |
df992848 | 284 | static inline pte_t pte_mkexec(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) & ~_PAGE_NX)); return pte; } |
4839057c AB |
285 | static inline pte_t pte_mkdirty(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) | _PAGE_DIRTY)); return pte; } |
286 | static inline pte_t pte_mkyoung(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) | _PAGE_ACCESSED)); return pte; } | |
287 | static inline pte_t pte_mkwrite(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) | _PAGE_RW)); return pte; } | |
8f860591 | 288 | static inline pte_t pte_mkhuge(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) | _PAGE_PSE)); return pte; } |
5e6b0bfe | 289 | static inline pte_t pte_clrhuge(pte_t pte) { set_pte(&pte, __pte(pte_val(pte) & ~_PAGE_PSE)); return pte; } |
1da177e4 LT |
290 | |
291 | struct vm_area_struct; | |
292 | ||
293 | static inline int ptep_test_and_clear_dirty(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep) | |
294 | { | |
295 | if (!pte_dirty(*ptep)) | |
296 | return 0; | |
3d1712c9 | 297 | return test_and_clear_bit(_PAGE_BIT_DIRTY, &ptep->pte); |
1da177e4 LT |
298 | } |
299 | ||
300 | static inline int ptep_test_and_clear_young(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep) | |
301 | { | |
302 | if (!pte_young(*ptep)) | |
303 | return 0; | |
3d1712c9 | 304 | return test_and_clear_bit(_PAGE_BIT_ACCESSED, &ptep->pte); |
1da177e4 LT |
305 | } |
306 | ||
307 | static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr, pte_t *ptep) | |
308 | { | |
3d1712c9 | 309 | clear_bit(_PAGE_BIT_RW, &ptep->pte); |
1da177e4 LT |
310 | } |
311 | ||
312 | /* | |
313 | * Macro to mark a page protection value as "uncacheable". | |
314 | */ | |
315 | #define pgprot_noncached(prot) (__pgprot(pgprot_val(prot) | _PAGE_PCD | _PAGE_PWT)) | |
316 | ||
1da177e4 LT |
317 | static inline int pmd_large(pmd_t pte) { |
318 | return (pmd_val(pte) & __LARGE_PTE) == __LARGE_PTE; | |
319 | } | |
320 | ||
321 | ||
322 | /* | |
323 | * Conversion functions: convert a page and protection to a page entry, | |
324 | * and a page entry and page directory to the page they refer to. | |
325 | */ | |
326 | ||
1da177e4 LT |
327 | /* |
328 | * Level 4 access. | |
329 | */ | |
46a82b2d DM |
330 | #define pgd_page_vaddr(pgd) ((unsigned long) __va((unsigned long)pgd_val(pgd) & PTE_MASK)) |
331 | #define pgd_page(pgd) (pfn_to_page(pgd_val(pgd) >> PAGE_SHIFT)) | |
1da177e4 LT |
332 | #define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD-1)) |
333 | #define pgd_offset(mm, addr) ((mm)->pgd + pgd_index(addr)) | |
334 | #define pgd_offset_k(address) (init_level4_pgt + pgd_index(address)) | |
335 | #define pgd_present(pgd) (pgd_val(pgd) & _PAGE_PRESENT) | |
336 | #define mk_kernel_pgd(address) ((pgd_t){ (address) | _KERNPG_TABLE }) | |
337 | ||
338 | /* PUD - Level3 access */ | |
339 | /* to find an entry in a page-table-directory. */ | |
46a82b2d DM |
340 | #define pud_page_vaddr(pud) ((unsigned long) __va(pud_val(pud) & PHYSICAL_PAGE_MASK)) |
341 | #define pud_page(pud) (pfn_to_page(pud_val(pud) >> PAGE_SHIFT)) | |
1da177e4 | 342 | #define pud_index(address) (((address) >> PUD_SHIFT) & (PTRS_PER_PUD-1)) |
46a82b2d | 343 | #define pud_offset(pgd, address) ((pud_t *) pgd_page_vaddr(*(pgd)) + pud_index(address)) |
1da177e4 LT |
344 | #define pud_present(pud) (pud_val(pud) & _PAGE_PRESENT) |
345 | ||
1da177e4 | 346 | /* PMD - Level 2 access */ |
46a82b2d | 347 | #define pmd_page_vaddr(pmd) ((unsigned long) __va(pmd_val(pmd) & PTE_MASK)) |
1da177e4 LT |
348 | #define pmd_page(pmd) (pfn_to_page(pmd_val(pmd) >> PAGE_SHIFT)) |
349 | ||
350 | #define pmd_index(address) (((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1)) | |
46a82b2d | 351 | #define pmd_offset(dir, address) ((pmd_t *) pud_page_vaddr(*(dir)) + \ |
1da177e4 LT |
352 | pmd_index(address)) |
353 | #define pmd_none(x) (!pmd_val(x)) | |
354 | #define pmd_present(x) (pmd_val(x) & _PAGE_PRESENT) | |
355 | #define pmd_clear(xp) do { set_pmd(xp, __pmd(0)); } while (0) | |
1da177e4 | 356 | #define pfn_pmd(nr,prot) (__pmd(((nr) << PAGE_SHIFT) | pgprot_val(prot))) |
6b75aeed | 357 | #define pmd_pfn(x) ((pmd_val(x) & __PHYSICAL_MASK) >> PAGE_SHIFT) |
1da177e4 LT |
358 | |
359 | #define pte_to_pgoff(pte) ((pte_val(pte) & PHYSICAL_PAGE_MASK) >> PAGE_SHIFT) | |
360 | #define pgoff_to_pte(off) ((pte_t) { ((off) << PAGE_SHIFT) | _PAGE_FILE }) | |
361 | #define PTE_FILE_MAX_BITS __PHYSICAL_MASK_SHIFT | |
362 | ||
363 | /* PTE - Level 1 access. */ | |
364 | ||
365 | /* page, protection -> pte */ | |
366 | #define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot)) | |
367 | #define mk_pte_huge(entry) (pte_val(entry) |= _PAGE_PRESENT | _PAGE_PSE) | |
368 | ||
1da177e4 | 369 | /* Change flags of a PTE */ |
9c0aa0f9 | 370 | static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) |
1da177e4 LT |
371 | { |
372 | pte_val(pte) &= _PAGE_CHG_MASK; | |
373 | pte_val(pte) |= pgprot_val(newprot); | |
374 | pte_val(pte) &= __supported_pte_mask; | |
375 | return pte; | |
376 | } | |
377 | ||
378 | #define pte_index(address) \ | |
1294b118 | 379 | (((address) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)) |
46a82b2d | 380 | #define pte_offset_kernel(dir, address) ((pte_t *) pmd_page_vaddr(*(dir)) + \ |
1da177e4 LT |
381 | pte_index(address)) |
382 | ||
383 | /* x86-64 always has all page tables mapped. */ | |
384 | #define pte_offset_map(dir,address) pte_offset_kernel(dir,address) | |
385 | #define pte_offset_map_nested(dir,address) pte_offset_kernel(dir,address) | |
386 | #define pte_unmap(pte) /* NOP */ | |
387 | #define pte_unmap_nested(pte) /* NOP */ | |
388 | ||
389 | #define update_mmu_cache(vma,address,pte) do { } while (0) | |
390 | ||
391 | /* We only update the dirty/accessed state if we set | |
392 | * the dirty bit by hand in the kernel, since the hardware | |
393 | * will do the accessed bit for us, and we don't want to | |
394 | * race with other CPU's that might be updating the dirty | |
395 | * bit at the same time. */ | |
396 | #define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS | |
397 | #define ptep_set_access_flags(__vma, __address, __ptep, __entry, __dirty) \ | |
398 | do { \ | |
399 | if (__dirty) { \ | |
400 | set_pte(__ptep, __entry); \ | |
401 | flush_tlb_page(__vma, __address); \ | |
402 | } \ | |
403 | } while (0) | |
404 | ||
405 | /* Encode and de-code a swap entry */ | |
406 | #define __swp_type(x) (((x).val >> 1) & 0x3f) | |
407 | #define __swp_offset(x) ((x).val >> 8) | |
408 | #define __swp_entry(type, offset) ((swp_entry_t) { ((type) << 1) | ((offset) << 8) }) | |
409 | #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) }) | |
410 | #define __swp_entry_to_pte(x) ((pte_t) { (x).val }) | |
411 | ||
8c914cb7 JB |
412 | extern spinlock_t pgd_lock; |
413 | extern struct page *pgd_list; | |
414 | void vmalloc_sync_all(void); | |
415 | ||
1da177e4 LT |
416 | extern int kern_addr_valid(unsigned long addr); |
417 | ||
1da177e4 LT |
418 | #define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \ |
419 | remap_pfn_range(vma, vaddr, pfn, size, prot) | |
420 | ||
421 | #define MK_IOSPACE_PFN(space, pfn) (pfn) | |
422 | #define GET_IOSPACE(pfn) 0 | |
423 | #define GET_PFN(pfn) (pfn) | |
424 | ||
425 | #define HAVE_ARCH_UNMAPPED_AREA | |
426 | ||
427 | #define pgtable_cache_init() do { } while (0) | |
428 | #define check_pgt_cache() do { } while (0) | |
429 | ||
430 | #define PAGE_AGP PAGE_KERNEL_NOCACHE | |
431 | #define HAVE_PAGE_AGP 1 | |
432 | ||
433 | /* fs/proc/kcore.c */ | |
434 | #define kc_vaddr_to_offset(v) ((v) & __VIRTUAL_MASK) | |
435 | #define kc_offset_to_vaddr(o) \ | |
436 | (((o) & (1UL << (__VIRTUAL_MASK_SHIFT-1))) ? ((o) | (~__VIRTUAL_MASK)) : (o)) | |
437 | ||
438 | #define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG | |
439 | #define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_DIRTY | |
440 | #define __HAVE_ARCH_PTEP_GET_AND_CLEAR | |
61e06037 | 441 | #define __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL |
1da177e4 LT |
442 | #define __HAVE_ARCH_PTEP_SET_WRPROTECT |
443 | #define __HAVE_ARCH_PTE_SAME | |
444 | #include <asm-generic/pgtable.h> | |
9d291e78 | 445 | #endif /* !__ASSEMBLY__ */ |
1da177e4 LT |
446 | |
447 | #endif /* _X86_64_PGTABLE_H */ |