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1965aae3 PA |
1 | #ifndef _ASM_X86_PGTABLE_H |
2 | #define _ASM_X86_PGTABLE_H | |
6c386655 | 3 | |
c47c1b1f IM |
4 | #include <asm/page.h> |
5 | ||
8d19c99f | 6 | #include <asm/pgtable_types.h> |
b2bc2731 | 7 | |
8a7b12f7 | 8 | /* |
9 | * Macro to mark a page protection value as UC- | |
10 | */ | |
11 | #define pgprot_noncached(prot) \ | |
12 | ((boot_cpu_data.x86 > 3) \ | |
13 | ? (__pgprot(pgprot_val(prot) | _PAGE_CACHE_UC_MINUS)) \ | |
14 | : (prot)) | |
15 | ||
4614139c | 16 | #ifndef __ASSEMBLY__ |
195466dc | 17 | |
8405b122 JF |
18 | /* |
19 | * ZERO_PAGE is a global shared page that is always zero: used | |
20 | * for zero-mapped memory areas etc.. | |
21 | */ | |
3cbaeafe | 22 | extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)]; |
8405b122 JF |
23 | #define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page)) |
24 | ||
e3ed910d JF |
25 | extern spinlock_t pgd_lock; |
26 | extern struct list_head pgd_list; | |
8405b122 | 27 | |
4614139c JF |
28 | /* |
29 | * The following only work if pte_present() is true. | |
30 | * Undefined behaviour if not.. | |
31 | */ | |
3cbaeafe JP |
32 | static inline int pte_dirty(pte_t pte) |
33 | { | |
a15af1c9 | 34 | return pte_flags(pte) & _PAGE_DIRTY; |
3cbaeafe JP |
35 | } |
36 | ||
37 | static inline int pte_young(pte_t pte) | |
38 | { | |
a15af1c9 | 39 | return pte_flags(pte) & _PAGE_ACCESSED; |
3cbaeafe JP |
40 | } |
41 | ||
42 | static inline int pte_write(pte_t pte) | |
43 | { | |
a15af1c9 | 44 | return pte_flags(pte) & _PAGE_RW; |
3cbaeafe JP |
45 | } |
46 | ||
47 | static inline int pte_file(pte_t pte) | |
48 | { | |
a15af1c9 | 49 | return pte_flags(pte) & _PAGE_FILE; |
3cbaeafe JP |
50 | } |
51 | ||
52 | static inline int pte_huge(pte_t pte) | |
53 | { | |
a15af1c9 | 54 | return pte_flags(pte) & _PAGE_PSE; |
4614139c JF |
55 | } |
56 | ||
3cbaeafe JP |
57 | static inline int pte_global(pte_t pte) |
58 | { | |
a15af1c9 | 59 | return pte_flags(pte) & _PAGE_GLOBAL; |
3cbaeafe JP |
60 | } |
61 | ||
62 | static inline int pte_exec(pte_t pte) | |
63 | { | |
a15af1c9 | 64 | return !(pte_flags(pte) & _PAGE_NX); |
3cbaeafe JP |
65 | } |
66 | ||
7e675137 NP |
67 | static inline int pte_special(pte_t pte) |
68 | { | |
606ee44d | 69 | return pte_flags(pte) & _PAGE_SPECIAL; |
7e675137 NP |
70 | } |
71 | ||
91030ca1 HD |
72 | static inline unsigned long pte_pfn(pte_t pte) |
73 | { | |
74 | return (pte_val(pte) & PTE_PFN_MASK) >> PAGE_SHIFT; | |
75 | } | |
76 | ||
77 | #define pte_page(pte) pfn_to_page(pte_pfn(pte)) | |
78 | ||
3cbaeafe JP |
79 | static inline int pmd_large(pmd_t pte) |
80 | { | |
18a7a199 | 81 | return (pmd_flags(pte) & (_PAGE_PSE | _PAGE_PRESENT)) == |
3cbaeafe JP |
82 | (_PAGE_PSE | _PAGE_PRESENT); |
83 | } | |
84 | ||
6522869c JF |
85 | static inline pte_t pte_set_flags(pte_t pte, pteval_t set) |
86 | { | |
87 | pteval_t v = native_pte_val(pte); | |
88 | ||
89 | return native_make_pte(v | set); | |
90 | } | |
91 | ||
92 | static inline pte_t pte_clear_flags(pte_t pte, pteval_t clear) | |
93 | { | |
94 | pteval_t v = native_pte_val(pte); | |
95 | ||
96 | return native_make_pte(v & ~clear); | |
97 | } | |
98 | ||
3cbaeafe JP |
99 | static inline pte_t pte_mkclean(pte_t pte) |
100 | { | |
6522869c | 101 | return pte_clear_flags(pte, _PAGE_DIRTY); |
3cbaeafe JP |
102 | } |
103 | ||
104 | static inline pte_t pte_mkold(pte_t pte) | |
105 | { | |
6522869c | 106 | return pte_clear_flags(pte, _PAGE_ACCESSED); |
3cbaeafe JP |
107 | } |
108 | ||
109 | static inline pte_t pte_wrprotect(pte_t pte) | |
110 | { | |
6522869c | 111 | return pte_clear_flags(pte, _PAGE_RW); |
3cbaeafe JP |
112 | } |
113 | ||
114 | static inline pte_t pte_mkexec(pte_t pte) | |
115 | { | |
6522869c | 116 | return pte_clear_flags(pte, _PAGE_NX); |
3cbaeafe JP |
117 | } |
118 | ||
119 | static inline pte_t pte_mkdirty(pte_t pte) | |
120 | { | |
6522869c | 121 | return pte_set_flags(pte, _PAGE_DIRTY); |
3cbaeafe JP |
122 | } |
123 | ||
124 | static inline pte_t pte_mkyoung(pte_t pte) | |
125 | { | |
6522869c | 126 | return pte_set_flags(pte, _PAGE_ACCESSED); |
3cbaeafe JP |
127 | } |
128 | ||
129 | static inline pte_t pte_mkwrite(pte_t pte) | |
130 | { | |
6522869c | 131 | return pte_set_flags(pte, _PAGE_RW); |
3cbaeafe JP |
132 | } |
133 | ||
134 | static inline pte_t pte_mkhuge(pte_t pte) | |
135 | { | |
6522869c | 136 | return pte_set_flags(pte, _PAGE_PSE); |
3cbaeafe JP |
137 | } |
138 | ||
139 | static inline pte_t pte_clrhuge(pte_t pte) | |
140 | { | |
6522869c | 141 | return pte_clear_flags(pte, _PAGE_PSE); |
3cbaeafe JP |
142 | } |
143 | ||
144 | static inline pte_t pte_mkglobal(pte_t pte) | |
145 | { | |
6522869c | 146 | return pte_set_flags(pte, _PAGE_GLOBAL); |
3cbaeafe JP |
147 | } |
148 | ||
149 | static inline pte_t pte_clrglobal(pte_t pte) | |
150 | { | |
6522869c | 151 | return pte_clear_flags(pte, _PAGE_GLOBAL); |
3cbaeafe | 152 | } |
4614139c | 153 | |
7e675137 NP |
154 | static inline pte_t pte_mkspecial(pte_t pte) |
155 | { | |
6522869c | 156 | return pte_set_flags(pte, _PAGE_SPECIAL); |
7e675137 NP |
157 | } |
158 | ||
6fdc05d4 JF |
159 | static inline pte_t pfn_pte(unsigned long page_nr, pgprot_t pgprot) |
160 | { | |
161 | return __pte((((phys_addr_t)page_nr << PAGE_SHIFT) | | |
162 | pgprot_val(pgprot)) & __supported_pte_mask); | |
163 | } | |
164 | ||
165 | static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot) | |
166 | { | |
167 | return __pmd((((phys_addr_t)page_nr << PAGE_SHIFT) | | |
168 | pgprot_val(pgprot)) & __supported_pte_mask); | |
169 | } | |
170 | ||
38472311 IM |
171 | static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) |
172 | { | |
173 | pteval_t val = pte_val(pte); | |
174 | ||
175 | /* | |
176 | * Chop off the NX bit (if present), and add the NX portion of | |
177 | * the newprot (if present): | |
178 | */ | |
1c12c4cf VP |
179 | val &= _PAGE_CHG_MASK; |
180 | val |= pgprot_val(newprot) & (~_PAGE_CHG_MASK) & __supported_pte_mask; | |
38472311 IM |
181 | |
182 | return __pte(val); | |
183 | } | |
184 | ||
1c12c4cf VP |
185 | /* mprotect needs to preserve PAT bits when updating vm_page_prot */ |
186 | #define pgprot_modify pgprot_modify | |
187 | static inline pgprot_t pgprot_modify(pgprot_t oldprot, pgprot_t newprot) | |
188 | { | |
189 | pgprotval_t preservebits = pgprot_val(oldprot) & _PAGE_CHG_MASK; | |
190 | pgprotval_t addbits = pgprot_val(newprot); | |
191 | return __pgprot(preservebits | addbits); | |
192 | } | |
193 | ||
77be1fab | 194 | #define pte_pgprot(x) __pgprot(pte_flags(x) & PTE_FLAGS_MASK) |
c6ca18eb | 195 | |
1e8e23bc AK |
196 | #define canon_pgprot(p) __pgprot(pgprot_val(p) & __supported_pte_mask) |
197 | ||
afc7d20c | 198 | static inline int is_new_memtype_allowed(unsigned long flags, |
199 | unsigned long new_flags) | |
200 | { | |
201 | /* | |
202 | * Certain new memtypes are not allowed with certain | |
203 | * requested memtype: | |
204 | * - request is uncached, return cannot be write-back | |
205 | * - request is write-combine, return cannot be write-back | |
206 | */ | |
207 | if ((flags == _PAGE_CACHE_UC_MINUS && | |
208 | new_flags == _PAGE_CACHE_WB) || | |
209 | (flags == _PAGE_CACHE_WC && | |
210 | new_flags == _PAGE_CACHE_WB)) { | |
211 | return 0; | |
212 | } | |
213 | ||
214 | return 1; | |
215 | } | |
216 | ||
4891645e JF |
217 | #ifdef CONFIG_PARAVIRT |
218 | #include <asm/paravirt.h> | |
219 | #else /* !CONFIG_PARAVIRT */ | |
220 | #define set_pte(ptep, pte) native_set_pte(ptep, pte) | |
221 | #define set_pte_at(mm, addr, ptep, pte) native_set_pte_at(mm, addr, ptep, pte) | |
222 | ||
223 | #define set_pte_present(mm, addr, ptep, pte) \ | |
224 | native_set_pte_present(mm, addr, ptep, pte) | |
225 | #define set_pte_atomic(ptep, pte) \ | |
226 | native_set_pte_atomic(ptep, pte) | |
227 | ||
228 | #define set_pmd(pmdp, pmd) native_set_pmd(pmdp, pmd) | |
229 | ||
230 | #ifndef __PAGETABLE_PUD_FOLDED | |
231 | #define set_pgd(pgdp, pgd) native_set_pgd(pgdp, pgd) | |
232 | #define pgd_clear(pgd) native_pgd_clear(pgd) | |
233 | #endif | |
234 | ||
235 | #ifndef set_pud | |
236 | # define set_pud(pudp, pud) native_set_pud(pudp, pud) | |
237 | #endif | |
238 | ||
239 | #ifndef __PAGETABLE_PMD_FOLDED | |
240 | #define pud_clear(pud) native_pud_clear(pud) | |
241 | #endif | |
242 | ||
243 | #define pte_clear(mm, addr, ptep) native_pte_clear(mm, addr, ptep) | |
244 | #define pmd_clear(pmd) native_pmd_clear(pmd) | |
245 | ||
246 | #define pte_update(mm, addr, ptep) do { } while (0) | |
247 | #define pte_update_defer(mm, addr, ptep) do { } while (0) | |
a312b37b EH |
248 | |
249 | static inline void __init paravirt_pagetable_setup_start(pgd_t *base) | |
250 | { | |
251 | native_pagetable_setup_start(base); | |
252 | } | |
253 | ||
254 | static inline void __init paravirt_pagetable_setup_done(pgd_t *base) | |
255 | { | |
256 | native_pagetable_setup_done(base); | |
257 | } | |
4891645e JF |
258 | #endif /* CONFIG_PARAVIRT */ |
259 | ||
aca159db JF |
260 | #endif /* __ASSEMBLY__ */ |
261 | ||
262 | #ifdef CONFIG_X86_32 | |
263 | # include "pgtable_32.h" | |
264 | #else | |
265 | # include "pgtable_64.h" | |
266 | #endif | |
267 | ||
268 | #ifndef __ASSEMBLY__ | |
f476961c | 269 | #include <linux/mm_types.h> |
aca159db | 270 | |
a034a010 JF |
271 | static inline int pte_none(pte_t pte) |
272 | { | |
273 | return !pte.pte; | |
274 | } | |
275 | ||
8de01da3 JF |
276 | #define __HAVE_ARCH_PTE_SAME |
277 | static inline int pte_same(pte_t a, pte_t b) | |
278 | { | |
279 | return a.pte == b.pte; | |
280 | } | |
281 | ||
7c683851 JF |
282 | static inline int pte_present(pte_t a) |
283 | { | |
284 | return pte_flags(a) & (_PAGE_PRESENT | _PAGE_PROTNONE); | |
285 | } | |
286 | ||
649e8ef6 JF |
287 | static inline int pmd_present(pmd_t pmd) |
288 | { | |
18a7a199 | 289 | return pmd_flags(pmd) & _PAGE_PRESENT; |
649e8ef6 JF |
290 | } |
291 | ||
4fea801a JF |
292 | static inline int pmd_none(pmd_t pmd) |
293 | { | |
294 | /* Only check low word on 32-bit platforms, since it might be | |
295 | out of sync with upper half. */ | |
26c8e317 | 296 | return (unsigned long)native_pmd_val(pmd) == 0; |
4fea801a JF |
297 | } |
298 | ||
3ffb3564 JF |
299 | static inline unsigned long pmd_page_vaddr(pmd_t pmd) |
300 | { | |
301 | return (unsigned long)__va(pmd_val(pmd) & PTE_PFN_MASK); | |
302 | } | |
303 | ||
e5f7f202 IM |
304 | /* |
305 | * Currently stuck as a macro due to indirect forward reference to | |
306 | * linux/mmzone.h's __section_mem_map_addr() definition: | |
307 | */ | |
308 | #define pmd_page(pmd) pfn_to_page(pmd_val(pmd) >> PAGE_SHIFT) | |
20063ca4 | 309 | |
e24d7eee JF |
310 | /* |
311 | * the pmd page can be thought of an array like this: pmd_t[PTRS_PER_PMD] | |
312 | * | |
313 | * this macro returns the index of the entry in the pmd page which would | |
314 | * control the given virtual address | |
315 | */ | |
316 | static inline unsigned pmd_index(unsigned long address) | |
317 | { | |
318 | return (address >> PMD_SHIFT) & (PTRS_PER_PMD - 1); | |
319 | } | |
320 | ||
97e2817d JF |
321 | /* |
322 | * Conversion functions: convert a page and protection to a page entry, | |
323 | * and a page entry and page directory to the page they refer to. | |
324 | * | |
325 | * (Currently stuck as a macro because of indirect forward reference | |
326 | * to linux/mm.h:page_to_nid()) | |
327 | */ | |
328 | #define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot)) | |
329 | ||
346309cf JF |
330 | /* |
331 | * the pte page can be thought of an array like this: pte_t[PTRS_PER_PTE] | |
332 | * | |
333 | * this function returns the index of the entry in the pte page which would | |
334 | * control the given virtual address | |
335 | */ | |
336 | static inline unsigned pte_index(unsigned long address) | |
337 | { | |
338 | return (address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1); | |
339 | } | |
340 | ||
3fbc2444 JF |
341 | static inline pte_t *pte_offset_kernel(pmd_t *pmd, unsigned long address) |
342 | { | |
343 | return (pte_t *)pmd_page_vaddr(*pmd) + pte_index(address); | |
344 | } | |
345 | ||
99510238 JF |
346 | static inline int pmd_bad(pmd_t pmd) |
347 | { | |
18a7a199 | 348 | return (pmd_flags(pmd) & ~_PAGE_USER) != _KERNPG_TABLE; |
99510238 JF |
349 | } |
350 | ||
cc290ca3 JF |
351 | static inline unsigned long pages_to_mb(unsigned long npg) |
352 | { | |
353 | return npg >> (20 - PAGE_SHIFT); | |
354 | } | |
355 | ||
6cf71500 JF |
356 | #define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \ |
357 | remap_pfn_range(vma, vaddr, pfn, size, prot) | |
358 | ||
c47c1b1f IM |
359 | #if PAGETABLE_LEVELS == 2 |
360 | static inline int pud_large(pud_t pud) | |
361 | { | |
362 | return 0; | |
363 | } | |
364 | #endif | |
365 | ||
5ba7c913 | 366 | #if PAGETABLE_LEVELS > 2 |
deb79cfb JF |
367 | static inline int pud_none(pud_t pud) |
368 | { | |
26c8e317 | 369 | return native_pud_val(pud) == 0; |
deb79cfb JF |
370 | } |
371 | ||
5ba7c913 JF |
372 | static inline int pud_present(pud_t pud) |
373 | { | |
18a7a199 | 374 | return pud_flags(pud) & _PAGE_PRESENT; |
5ba7c913 | 375 | } |
6fff47e3 JF |
376 | |
377 | static inline unsigned long pud_page_vaddr(pud_t pud) | |
378 | { | |
379 | return (unsigned long)__va((unsigned long)pud_val(pud) & PTE_PFN_MASK); | |
380 | } | |
f476961c | 381 | |
e5f7f202 IM |
382 | /* |
383 | * Currently stuck as a macro due to indirect forward reference to | |
384 | * linux/mmzone.h's __section_mem_map_addr() definition: | |
385 | */ | |
386 | #define pud_page(pud) pfn_to_page(pud_val(pud) >> PAGE_SHIFT) | |
01ade20d JF |
387 | |
388 | /* Find an entry in the second-level page table.. */ | |
389 | static inline pmd_t *pmd_offset(pud_t *pud, unsigned long address) | |
390 | { | |
391 | return (pmd_t *)pud_page_vaddr(*pud) + pmd_index(address); | |
392 | } | |
3180fba0 JF |
393 | |
394 | static inline unsigned long pmd_pfn(pmd_t pmd) | |
395 | { | |
396 | return (pmd_val(pmd) & PTE_PFN_MASK) >> PAGE_SHIFT; | |
397 | } | |
3f6cbef1 JF |
398 | |
399 | static inline int pud_large(pud_t pud) | |
400 | { | |
e2f5bda9 | 401 | return (pud_val(pud) & (_PAGE_PSE | _PAGE_PRESENT)) == |
3f6cbef1 JF |
402 | (_PAGE_PSE | _PAGE_PRESENT); |
403 | } | |
a61bb29a JF |
404 | |
405 | static inline int pud_bad(pud_t pud) | |
406 | { | |
18a7a199 | 407 | return (pud_flags(pud) & ~(_KERNPG_TABLE | _PAGE_USER)) != 0; |
a61bb29a | 408 | } |
e2f5bda9 JF |
409 | #else |
410 | static inline int pud_large(pud_t pud) | |
411 | { | |
412 | return 0; | |
413 | } | |
5ba7c913 JF |
414 | #endif /* PAGETABLE_LEVELS > 2 */ |
415 | ||
9f38d7e8 JF |
416 | #if PAGETABLE_LEVELS > 3 |
417 | static inline int pgd_present(pgd_t pgd) | |
418 | { | |
18a7a199 | 419 | return pgd_flags(pgd) & _PAGE_PRESENT; |
9f38d7e8 | 420 | } |
c5f040b1 JF |
421 | |
422 | static inline unsigned long pgd_page_vaddr(pgd_t pgd) | |
423 | { | |
424 | return (unsigned long)__va((unsigned long)pgd_val(pgd) & PTE_PFN_MASK); | |
425 | } | |
777cba16 | 426 | |
e5f7f202 IM |
427 | /* |
428 | * Currently stuck as a macro due to indirect forward reference to | |
429 | * linux/mmzone.h's __section_mem_map_addr() definition: | |
430 | */ | |
431 | #define pgd_page(pgd) pfn_to_page(pgd_val(pgd) >> PAGE_SHIFT) | |
7cfb8102 JF |
432 | |
433 | /* to find an entry in a page-table-directory. */ | |
434 | static inline unsigned pud_index(unsigned long address) | |
435 | { | |
436 | return (address >> PUD_SHIFT) & (PTRS_PER_PUD - 1); | |
437 | } | |
3d081b18 JF |
438 | |
439 | static inline pud_t *pud_offset(pgd_t *pgd, unsigned long address) | |
440 | { | |
441 | return (pud_t *)pgd_page_vaddr(*pgd) + pud_index(address); | |
442 | } | |
30f10316 JF |
443 | |
444 | static inline int pgd_bad(pgd_t pgd) | |
445 | { | |
18a7a199 | 446 | return (pgd_flags(pgd) & ~_PAGE_USER) != _KERNPG_TABLE; |
30f10316 | 447 | } |
7325cc2e JF |
448 | |
449 | static inline int pgd_none(pgd_t pgd) | |
450 | { | |
26c8e317 | 451 | return !native_pgd_val(pgd); |
7325cc2e | 452 | } |
9f38d7e8 JF |
453 | #endif /* PAGETABLE_LEVELS > 3 */ |
454 | ||
4614139c JF |
455 | #endif /* __ASSEMBLY__ */ |
456 | ||
fb15a9b3 JF |
457 | /* |
458 | * the pgd page can be thought of an array like this: pgd_t[PTRS_PER_PGD] | |
459 | * | |
460 | * this macro returns the index of the entry in the pgd page which would | |
461 | * control the given virtual address | |
462 | */ | |
463 | #define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1)) | |
464 | ||
465 | /* | |
466 | * pgd_offset() returns a (pgd_t *) | |
467 | * pgd_index() is used get the offset into the pgd page's array of pgd_t's; | |
468 | */ | |
469 | #define pgd_offset(mm, address) ((mm)->pgd + pgd_index((address))) | |
470 | /* | |
471 | * a shortcut which implies the use of the kernel's pgd, instead | |
472 | * of a process's | |
473 | */ | |
474 | #define pgd_offset_k(address) pgd_offset(&init_mm, (address)) | |
475 | ||
476 | ||
68db065c JF |
477 | #define KERNEL_PGD_BOUNDARY pgd_index(PAGE_OFFSET) |
478 | #define KERNEL_PGD_PTRS (PTRS_PER_PGD - KERNEL_PGD_BOUNDARY) | |
479 | ||
195466dc JF |
480 | #ifndef __ASSEMBLY__ |
481 | ||
4891645e JF |
482 | /* local pte updates need not use xchg for locking */ |
483 | static inline pte_t native_local_ptep_get_and_clear(pte_t *ptep) | |
484 | { | |
485 | pte_t res = *ptep; | |
486 | ||
487 | /* Pure native function needs no input for mm, addr */ | |
488 | native_pte_clear(NULL, 0, ptep); | |
489 | return res; | |
490 | } | |
491 | ||
492 | static inline void native_set_pte_at(struct mm_struct *mm, unsigned long addr, | |
493 | pte_t *ptep , pte_t pte) | |
494 | { | |
495 | native_set_pte(ptep, pte); | |
496 | } | |
497 | ||
195466dc JF |
498 | #ifndef CONFIG_PARAVIRT |
499 | /* | |
500 | * Rules for using pte_update - it must be called after any PTE update which | |
501 | * has not been done using the set_pte / clear_pte interfaces. It is used by | |
502 | * shadow mode hypervisors to resynchronize the shadow page tables. Kernel PTE | |
503 | * updates should either be sets, clears, or set_pte_atomic for P->P | |
504 | * transitions, which means this hook should only be called for user PTEs. | |
505 | * This hook implies a P->P protection or access change has taken place, which | |
506 | * requires a subsequent TLB flush. The notification can optionally be delayed | |
507 | * until the TLB flush event by using the pte_update_defer form of the | |
508 | * interface, but care must be taken to assure that the flush happens while | |
509 | * still holding the same page table lock so that the shadow and primary pages | |
510 | * do not become out of sync on SMP. | |
511 | */ | |
512 | #define pte_update(mm, addr, ptep) do { } while (0) | |
513 | #define pte_update_defer(mm, addr, ptep) do { } while (0) | |
514 | #endif | |
515 | ||
195466dc JF |
516 | /* |
517 | * We only update the dirty/accessed state if we set | |
518 | * the dirty bit by hand in the kernel, since the hardware | |
519 | * will do the accessed bit for us, and we don't want to | |
520 | * race with other CPU's that might be updating the dirty | |
521 | * bit at the same time. | |
522 | */ | |
bea41808 JF |
523 | struct vm_area_struct; |
524 | ||
195466dc | 525 | #define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS |
ee5aa8d3 JF |
526 | extern int ptep_set_access_flags(struct vm_area_struct *vma, |
527 | unsigned long address, pte_t *ptep, | |
528 | pte_t entry, int dirty); | |
195466dc JF |
529 | |
530 | #define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG | |
f9fbf1a3 JF |
531 | extern int ptep_test_and_clear_young(struct vm_area_struct *vma, |
532 | unsigned long addr, pte_t *ptep); | |
195466dc JF |
533 | |
534 | #define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH | |
c20311e1 JF |
535 | extern int ptep_clear_flush_young(struct vm_area_struct *vma, |
536 | unsigned long address, pte_t *ptep); | |
195466dc JF |
537 | |
538 | #define __HAVE_ARCH_PTEP_GET_AND_CLEAR | |
3cbaeafe JP |
539 | static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, |
540 | pte_t *ptep) | |
195466dc JF |
541 | { |
542 | pte_t pte = native_ptep_get_and_clear(ptep); | |
543 | pte_update(mm, addr, ptep); | |
544 | return pte; | |
545 | } | |
546 | ||
547 | #define __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL | |
3cbaeafe JP |
548 | static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm, |
549 | unsigned long addr, pte_t *ptep, | |
550 | int full) | |
195466dc JF |
551 | { |
552 | pte_t pte; | |
553 | if (full) { | |
554 | /* | |
555 | * Full address destruction in progress; paravirt does not | |
556 | * care about updates and native needs no locking | |
557 | */ | |
558 | pte = native_local_ptep_get_and_clear(ptep); | |
559 | } else { | |
560 | pte = ptep_get_and_clear(mm, addr, ptep); | |
561 | } | |
562 | return pte; | |
563 | } | |
564 | ||
565 | #define __HAVE_ARCH_PTEP_SET_WRPROTECT | |
3cbaeafe JP |
566 | static inline void ptep_set_wrprotect(struct mm_struct *mm, |
567 | unsigned long addr, pte_t *ptep) | |
195466dc | 568 | { |
d8d89827 | 569 | clear_bit(_PAGE_BIT_RW, (unsigned long *)&ptep->pte); |
195466dc JF |
570 | pte_update(mm, addr, ptep); |
571 | } | |
572 | ||
85958b46 JF |
573 | /* |
574 | * clone_pgd_range(pgd_t *dst, pgd_t *src, int count); | |
575 | * | |
576 | * dst - pointer to pgd range anwhere on a pgd page | |
577 | * src - "" | |
578 | * count - the number of pgds to copy. | |
579 | * | |
580 | * dst and src can be on the same page, but the range must not overlap, | |
581 | * and must not cross a page boundary. | |
582 | */ | |
583 | static inline void clone_pgd_range(pgd_t *dst, pgd_t *src, int count) | |
584 | { | |
585 | memcpy(dst, src, count * sizeof(pgd_t)); | |
586 | } | |
587 | ||
588 | ||
195466dc JF |
589 | #include <asm-generic/pgtable.h> |
590 | #endif /* __ASSEMBLY__ */ | |
591 | ||
1965aae3 | 592 | #endif /* _ASM_X86_PGTABLE_H */ |