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1965aae3 PA |
1 | #ifndef _ASM_X86_PGTABLE_H |
2 | #define _ASM_X86_PGTABLE_H | |
6c386655 | 3 | |
c47c1b1f | 4 | #include <asm/page.h> |
1adcaafe | 5 | #include <asm/e820.h> |
c47c1b1f | 6 | |
8d19c99f | 7 | #include <asm/pgtable_types.h> |
b2bc2731 | 8 | |
8a7b12f7 | 9 | /* |
10 | * Macro to mark a page protection value as UC- | |
11 | */ | |
12 | #define pgprot_noncached(prot) \ | |
13 | ((boot_cpu_data.x86 > 3) \ | |
14 | ? (__pgprot(pgprot_val(prot) | _PAGE_CACHE_UC_MINUS)) \ | |
15 | : (prot)) | |
16 | ||
4614139c | 17 | #ifndef __ASSEMBLY__ |
195466dc | 18 | |
8405b122 JF |
19 | /* |
20 | * ZERO_PAGE is a global shared page that is always zero: used | |
21 | * for zero-mapped memory areas etc.. | |
22 | */ | |
3cbaeafe | 23 | extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)]; |
8405b122 JF |
24 | #define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page)) |
25 | ||
e3ed910d JF |
26 | extern spinlock_t pgd_lock; |
27 | extern struct list_head pgd_list; | |
8405b122 | 28 | |
54321d94 JF |
29 | #ifdef CONFIG_PARAVIRT |
30 | #include <asm/paravirt.h> | |
31 | #else /* !CONFIG_PARAVIRT */ | |
32 | #define set_pte(ptep, pte) native_set_pte(ptep, pte) | |
33 | #define set_pte_at(mm, addr, ptep, pte) native_set_pte_at(mm, addr, ptep, pte) | |
34 | ||
54321d94 JF |
35 | #define set_pte_atomic(ptep, pte) \ |
36 | native_set_pte_atomic(ptep, pte) | |
37 | ||
38 | #define set_pmd(pmdp, pmd) native_set_pmd(pmdp, pmd) | |
39 | ||
40 | #ifndef __PAGETABLE_PUD_FOLDED | |
41 | #define set_pgd(pgdp, pgd) native_set_pgd(pgdp, pgd) | |
42 | #define pgd_clear(pgd) native_pgd_clear(pgd) | |
43 | #endif | |
44 | ||
45 | #ifndef set_pud | |
46 | # define set_pud(pudp, pud) native_set_pud(pudp, pud) | |
47 | #endif | |
48 | ||
49 | #ifndef __PAGETABLE_PMD_FOLDED | |
50 | #define pud_clear(pud) native_pud_clear(pud) | |
51 | #endif | |
52 | ||
53 | #define pte_clear(mm, addr, ptep) native_pte_clear(mm, addr, ptep) | |
54 | #define pmd_clear(pmd) native_pmd_clear(pmd) | |
55 | ||
56 | #define pte_update(mm, addr, ptep) do { } while (0) | |
57 | #define pte_update_defer(mm, addr, ptep) do { } while (0) | |
58 | ||
59 | static inline void __init paravirt_pagetable_setup_start(pgd_t *base) | |
60 | { | |
61 | native_pagetable_setup_start(base); | |
62 | } | |
63 | ||
64 | static inline void __init paravirt_pagetable_setup_done(pgd_t *base) | |
65 | { | |
66 | native_pagetable_setup_done(base); | |
67 | } | |
68 | ||
69 | #define pgd_val(x) native_pgd_val(x) | |
70 | #define __pgd(x) native_make_pgd(x) | |
71 | ||
72 | #ifndef __PAGETABLE_PUD_FOLDED | |
73 | #define pud_val(x) native_pud_val(x) | |
74 | #define __pud(x) native_make_pud(x) | |
75 | #endif | |
76 | ||
77 | #ifndef __PAGETABLE_PMD_FOLDED | |
78 | #define pmd_val(x) native_pmd_val(x) | |
79 | #define __pmd(x) native_make_pmd(x) | |
80 | #endif | |
81 | ||
82 | #define pte_val(x) native_pte_val(x) | |
83 | #define __pte(x) native_make_pte(x) | |
84 | ||
224101ed JF |
85 | #define arch_end_context_switch(prev) do {} while(0) |
86 | ||
54321d94 JF |
87 | #endif /* CONFIG_PARAVIRT */ |
88 | ||
4614139c JF |
89 | /* |
90 | * The following only work if pte_present() is true. | |
91 | * Undefined behaviour if not.. | |
92 | */ | |
3cbaeafe JP |
93 | static inline int pte_dirty(pte_t pte) |
94 | { | |
a15af1c9 | 95 | return pte_flags(pte) & _PAGE_DIRTY; |
3cbaeafe JP |
96 | } |
97 | ||
98 | static inline int pte_young(pte_t pte) | |
99 | { | |
a15af1c9 | 100 | return pte_flags(pte) & _PAGE_ACCESSED; |
3cbaeafe JP |
101 | } |
102 | ||
103 | static inline int pte_write(pte_t pte) | |
104 | { | |
a15af1c9 | 105 | return pte_flags(pte) & _PAGE_RW; |
3cbaeafe JP |
106 | } |
107 | ||
108 | static inline int pte_file(pte_t pte) | |
109 | { | |
a15af1c9 | 110 | return pte_flags(pte) & _PAGE_FILE; |
3cbaeafe JP |
111 | } |
112 | ||
113 | static inline int pte_huge(pte_t pte) | |
114 | { | |
a15af1c9 | 115 | return pte_flags(pte) & _PAGE_PSE; |
4614139c JF |
116 | } |
117 | ||
3cbaeafe JP |
118 | static inline int pte_global(pte_t pte) |
119 | { | |
a15af1c9 | 120 | return pte_flags(pte) & _PAGE_GLOBAL; |
3cbaeafe JP |
121 | } |
122 | ||
123 | static inline int pte_exec(pte_t pte) | |
124 | { | |
a15af1c9 | 125 | return !(pte_flags(pte) & _PAGE_NX); |
3cbaeafe JP |
126 | } |
127 | ||
7e675137 NP |
128 | static inline int pte_special(pte_t pte) |
129 | { | |
606ee44d | 130 | return pte_flags(pte) & _PAGE_SPECIAL; |
7e675137 NP |
131 | } |
132 | ||
91030ca1 HD |
133 | static inline unsigned long pte_pfn(pte_t pte) |
134 | { | |
135 | return (pte_val(pte) & PTE_PFN_MASK) >> PAGE_SHIFT; | |
136 | } | |
137 | ||
138 | #define pte_page(pte) pfn_to_page(pte_pfn(pte)) | |
139 | ||
3cbaeafe JP |
140 | static inline int pmd_large(pmd_t pte) |
141 | { | |
18a7a199 | 142 | return (pmd_flags(pte) & (_PAGE_PSE | _PAGE_PRESENT)) == |
3cbaeafe JP |
143 | (_PAGE_PSE | _PAGE_PRESENT); |
144 | } | |
145 | ||
6522869c JF |
146 | static inline pte_t pte_set_flags(pte_t pte, pteval_t set) |
147 | { | |
148 | pteval_t v = native_pte_val(pte); | |
149 | ||
150 | return native_make_pte(v | set); | |
151 | } | |
152 | ||
153 | static inline pte_t pte_clear_flags(pte_t pte, pteval_t clear) | |
154 | { | |
155 | pteval_t v = native_pte_val(pte); | |
156 | ||
157 | return native_make_pte(v & ~clear); | |
158 | } | |
159 | ||
3cbaeafe JP |
160 | static inline pte_t pte_mkclean(pte_t pte) |
161 | { | |
6522869c | 162 | return pte_clear_flags(pte, _PAGE_DIRTY); |
3cbaeafe JP |
163 | } |
164 | ||
165 | static inline pte_t pte_mkold(pte_t pte) | |
166 | { | |
6522869c | 167 | return pte_clear_flags(pte, _PAGE_ACCESSED); |
3cbaeafe JP |
168 | } |
169 | ||
170 | static inline pte_t pte_wrprotect(pte_t pte) | |
171 | { | |
6522869c | 172 | return pte_clear_flags(pte, _PAGE_RW); |
3cbaeafe JP |
173 | } |
174 | ||
175 | static inline pte_t pte_mkexec(pte_t pte) | |
176 | { | |
6522869c | 177 | return pte_clear_flags(pte, _PAGE_NX); |
3cbaeafe JP |
178 | } |
179 | ||
180 | static inline pte_t pte_mkdirty(pte_t pte) | |
181 | { | |
6522869c | 182 | return pte_set_flags(pte, _PAGE_DIRTY); |
3cbaeafe JP |
183 | } |
184 | ||
185 | static inline pte_t pte_mkyoung(pte_t pte) | |
186 | { | |
6522869c | 187 | return pte_set_flags(pte, _PAGE_ACCESSED); |
3cbaeafe JP |
188 | } |
189 | ||
190 | static inline pte_t pte_mkwrite(pte_t pte) | |
191 | { | |
6522869c | 192 | return pte_set_flags(pte, _PAGE_RW); |
3cbaeafe JP |
193 | } |
194 | ||
195 | static inline pte_t pte_mkhuge(pte_t pte) | |
196 | { | |
6522869c | 197 | return pte_set_flags(pte, _PAGE_PSE); |
3cbaeafe JP |
198 | } |
199 | ||
200 | static inline pte_t pte_clrhuge(pte_t pte) | |
201 | { | |
6522869c | 202 | return pte_clear_flags(pte, _PAGE_PSE); |
3cbaeafe JP |
203 | } |
204 | ||
205 | static inline pte_t pte_mkglobal(pte_t pte) | |
206 | { | |
6522869c | 207 | return pte_set_flags(pte, _PAGE_GLOBAL); |
3cbaeafe JP |
208 | } |
209 | ||
210 | static inline pte_t pte_clrglobal(pte_t pte) | |
211 | { | |
6522869c | 212 | return pte_clear_flags(pte, _PAGE_GLOBAL); |
3cbaeafe | 213 | } |
4614139c | 214 | |
7e675137 NP |
215 | static inline pte_t pte_mkspecial(pte_t pte) |
216 | { | |
6522869c | 217 | return pte_set_flags(pte, _PAGE_SPECIAL); |
7e675137 NP |
218 | } |
219 | ||
b534816b JF |
220 | /* |
221 | * Mask out unsupported bits in a present pgprot. Non-present pgprots | |
222 | * can use those bits for other purposes, so leave them be. | |
223 | */ | |
224 | static inline pgprotval_t massage_pgprot(pgprot_t pgprot) | |
225 | { | |
226 | pgprotval_t protval = pgprot_val(pgprot); | |
227 | ||
228 | if (protval & _PAGE_PRESENT) | |
229 | protval &= __supported_pte_mask; | |
230 | ||
231 | return protval; | |
232 | } | |
233 | ||
6fdc05d4 JF |
234 | static inline pte_t pfn_pte(unsigned long page_nr, pgprot_t pgprot) |
235 | { | |
b534816b JF |
236 | return __pte(((phys_addr_t)page_nr << PAGE_SHIFT) | |
237 | massage_pgprot(pgprot)); | |
6fdc05d4 JF |
238 | } |
239 | ||
240 | static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot) | |
241 | { | |
b534816b JF |
242 | return __pmd(((phys_addr_t)page_nr << PAGE_SHIFT) | |
243 | massage_pgprot(pgprot)); | |
6fdc05d4 JF |
244 | } |
245 | ||
38472311 IM |
246 | static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) |
247 | { | |
248 | pteval_t val = pte_val(pte); | |
249 | ||
250 | /* | |
251 | * Chop off the NX bit (if present), and add the NX portion of | |
252 | * the newprot (if present): | |
253 | */ | |
1c12c4cf | 254 | val &= _PAGE_CHG_MASK; |
b534816b | 255 | val |= massage_pgprot(newprot) & ~_PAGE_CHG_MASK; |
38472311 IM |
256 | |
257 | return __pte(val); | |
258 | } | |
259 | ||
1c12c4cf VP |
260 | /* mprotect needs to preserve PAT bits when updating vm_page_prot */ |
261 | #define pgprot_modify pgprot_modify | |
262 | static inline pgprot_t pgprot_modify(pgprot_t oldprot, pgprot_t newprot) | |
263 | { | |
264 | pgprotval_t preservebits = pgprot_val(oldprot) & _PAGE_CHG_MASK; | |
265 | pgprotval_t addbits = pgprot_val(newprot); | |
266 | return __pgprot(preservebits | addbits); | |
267 | } | |
268 | ||
77be1fab | 269 | #define pte_pgprot(x) __pgprot(pte_flags(x) & PTE_FLAGS_MASK) |
c6ca18eb | 270 | |
b534816b | 271 | #define canon_pgprot(p) __pgprot(massage_pgprot(p)) |
1e8e23bc | 272 | |
1adcaafe SS |
273 | static inline int is_new_memtype_allowed(u64 paddr, unsigned long size, |
274 | unsigned long flags, | |
275 | unsigned long new_flags) | |
afc7d20c | 276 | { |
1adcaafe SS |
277 | /* |
278 | * PAT type is always WB for ISA. So no need to check. | |
279 | */ | |
280 | if (is_ISA_range(paddr, paddr + size - 1)) | |
281 | return 1; | |
282 | ||
afc7d20c | 283 | /* |
284 | * Certain new memtypes are not allowed with certain | |
285 | * requested memtype: | |
286 | * - request is uncached, return cannot be write-back | |
287 | * - request is write-combine, return cannot be write-back | |
288 | */ | |
289 | if ((flags == _PAGE_CACHE_UC_MINUS && | |
290 | new_flags == _PAGE_CACHE_WB) || | |
291 | (flags == _PAGE_CACHE_WC && | |
292 | new_flags == _PAGE_CACHE_WB)) { | |
293 | return 0; | |
294 | } | |
295 | ||
296 | return 1; | |
297 | } | |
298 | ||
458a3e64 TH |
299 | pmd_t *populate_extra_pmd(unsigned long vaddr); |
300 | pte_t *populate_extra_pte(unsigned long vaddr); | |
4614139c JF |
301 | #endif /* __ASSEMBLY__ */ |
302 | ||
96a388de TG |
303 | #ifdef CONFIG_X86_32 |
304 | # include "pgtable_32.h" | |
305 | #else | |
306 | # include "pgtable_64.h" | |
307 | #endif | |
6c386655 | 308 | |
aca159db | 309 | #ifndef __ASSEMBLY__ |
f476961c | 310 | #include <linux/mm_types.h> |
aca159db | 311 | |
a034a010 JF |
312 | static inline int pte_none(pte_t pte) |
313 | { | |
314 | return !pte.pte; | |
315 | } | |
316 | ||
8de01da3 JF |
317 | #define __HAVE_ARCH_PTE_SAME |
318 | static inline int pte_same(pte_t a, pte_t b) | |
319 | { | |
320 | return a.pte == b.pte; | |
321 | } | |
322 | ||
7c683851 JF |
323 | static inline int pte_present(pte_t a) |
324 | { | |
325 | return pte_flags(a) & (_PAGE_PRESENT | _PAGE_PROTNONE); | |
326 | } | |
327 | ||
eb63657e | 328 | static inline int pte_hidden(pte_t pte) |
dfec072e | 329 | { |
eb63657e | 330 | return pte_flags(pte) & _PAGE_HIDDEN; |
dfec072e VN |
331 | } |
332 | ||
649e8ef6 JF |
333 | static inline int pmd_present(pmd_t pmd) |
334 | { | |
18a7a199 | 335 | return pmd_flags(pmd) & _PAGE_PRESENT; |
649e8ef6 JF |
336 | } |
337 | ||
4fea801a JF |
338 | static inline int pmd_none(pmd_t pmd) |
339 | { | |
340 | /* Only check low word on 32-bit platforms, since it might be | |
341 | out of sync with upper half. */ | |
26c8e317 | 342 | return (unsigned long)native_pmd_val(pmd) == 0; |
4fea801a JF |
343 | } |
344 | ||
3ffb3564 JF |
345 | static inline unsigned long pmd_page_vaddr(pmd_t pmd) |
346 | { | |
347 | return (unsigned long)__va(pmd_val(pmd) & PTE_PFN_MASK); | |
348 | } | |
349 | ||
e5f7f202 IM |
350 | /* |
351 | * Currently stuck as a macro due to indirect forward reference to | |
352 | * linux/mmzone.h's __section_mem_map_addr() definition: | |
353 | */ | |
354 | #define pmd_page(pmd) pfn_to_page(pmd_val(pmd) >> PAGE_SHIFT) | |
20063ca4 | 355 | |
e24d7eee JF |
356 | /* |
357 | * the pmd page can be thought of an array like this: pmd_t[PTRS_PER_PMD] | |
358 | * | |
359 | * this macro returns the index of the entry in the pmd page which would | |
360 | * control the given virtual address | |
361 | */ | |
362 | static inline unsigned pmd_index(unsigned long address) | |
363 | { | |
364 | return (address >> PMD_SHIFT) & (PTRS_PER_PMD - 1); | |
365 | } | |
366 | ||
97e2817d JF |
367 | /* |
368 | * Conversion functions: convert a page and protection to a page entry, | |
369 | * and a page entry and page directory to the page they refer to. | |
370 | * | |
371 | * (Currently stuck as a macro because of indirect forward reference | |
372 | * to linux/mm.h:page_to_nid()) | |
373 | */ | |
374 | #define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot)) | |
375 | ||
346309cf JF |
376 | /* |
377 | * the pte page can be thought of an array like this: pte_t[PTRS_PER_PTE] | |
378 | * | |
379 | * this function returns the index of the entry in the pte page which would | |
380 | * control the given virtual address | |
381 | */ | |
382 | static inline unsigned pte_index(unsigned long address) | |
383 | { | |
384 | return (address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1); | |
385 | } | |
386 | ||
3fbc2444 JF |
387 | static inline pte_t *pte_offset_kernel(pmd_t *pmd, unsigned long address) |
388 | { | |
389 | return (pte_t *)pmd_page_vaddr(*pmd) + pte_index(address); | |
390 | } | |
391 | ||
99510238 JF |
392 | static inline int pmd_bad(pmd_t pmd) |
393 | { | |
18a7a199 | 394 | return (pmd_flags(pmd) & ~_PAGE_USER) != _KERNPG_TABLE; |
99510238 JF |
395 | } |
396 | ||
cc290ca3 JF |
397 | static inline unsigned long pages_to_mb(unsigned long npg) |
398 | { | |
399 | return npg >> (20 - PAGE_SHIFT); | |
400 | } | |
401 | ||
6cf71500 JF |
402 | #define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \ |
403 | remap_pfn_range(vma, vaddr, pfn, size, prot) | |
404 | ||
5ba7c913 | 405 | #if PAGETABLE_LEVELS > 2 |
deb79cfb JF |
406 | static inline int pud_none(pud_t pud) |
407 | { | |
26c8e317 | 408 | return native_pud_val(pud) == 0; |
deb79cfb JF |
409 | } |
410 | ||
5ba7c913 JF |
411 | static inline int pud_present(pud_t pud) |
412 | { | |
18a7a199 | 413 | return pud_flags(pud) & _PAGE_PRESENT; |
5ba7c913 | 414 | } |
6fff47e3 JF |
415 | |
416 | static inline unsigned long pud_page_vaddr(pud_t pud) | |
417 | { | |
418 | return (unsigned long)__va((unsigned long)pud_val(pud) & PTE_PFN_MASK); | |
419 | } | |
f476961c | 420 | |
e5f7f202 IM |
421 | /* |
422 | * Currently stuck as a macro due to indirect forward reference to | |
423 | * linux/mmzone.h's __section_mem_map_addr() definition: | |
424 | */ | |
425 | #define pud_page(pud) pfn_to_page(pud_val(pud) >> PAGE_SHIFT) | |
01ade20d JF |
426 | |
427 | /* Find an entry in the second-level page table.. */ | |
428 | static inline pmd_t *pmd_offset(pud_t *pud, unsigned long address) | |
429 | { | |
430 | return (pmd_t *)pud_page_vaddr(*pud) + pmd_index(address); | |
431 | } | |
3180fba0 JF |
432 | |
433 | static inline unsigned long pmd_pfn(pmd_t pmd) | |
434 | { | |
435 | return (pmd_val(pmd) & PTE_PFN_MASK) >> PAGE_SHIFT; | |
436 | } | |
3f6cbef1 JF |
437 | |
438 | static inline int pud_large(pud_t pud) | |
439 | { | |
e2f5bda9 | 440 | return (pud_val(pud) & (_PAGE_PSE | _PAGE_PRESENT)) == |
3f6cbef1 JF |
441 | (_PAGE_PSE | _PAGE_PRESENT); |
442 | } | |
a61bb29a JF |
443 | |
444 | static inline int pud_bad(pud_t pud) | |
445 | { | |
18a7a199 | 446 | return (pud_flags(pud) & ~(_KERNPG_TABLE | _PAGE_USER)) != 0; |
a61bb29a | 447 | } |
e2f5bda9 JF |
448 | #else |
449 | static inline int pud_large(pud_t pud) | |
450 | { | |
451 | return 0; | |
452 | } | |
5ba7c913 JF |
453 | #endif /* PAGETABLE_LEVELS > 2 */ |
454 | ||
9f38d7e8 JF |
455 | #if PAGETABLE_LEVELS > 3 |
456 | static inline int pgd_present(pgd_t pgd) | |
457 | { | |
18a7a199 | 458 | return pgd_flags(pgd) & _PAGE_PRESENT; |
9f38d7e8 | 459 | } |
c5f040b1 JF |
460 | |
461 | static inline unsigned long pgd_page_vaddr(pgd_t pgd) | |
462 | { | |
463 | return (unsigned long)__va((unsigned long)pgd_val(pgd) & PTE_PFN_MASK); | |
464 | } | |
777cba16 | 465 | |
e5f7f202 IM |
466 | /* |
467 | * Currently stuck as a macro due to indirect forward reference to | |
468 | * linux/mmzone.h's __section_mem_map_addr() definition: | |
469 | */ | |
470 | #define pgd_page(pgd) pfn_to_page(pgd_val(pgd) >> PAGE_SHIFT) | |
7cfb8102 JF |
471 | |
472 | /* to find an entry in a page-table-directory. */ | |
473 | static inline unsigned pud_index(unsigned long address) | |
474 | { | |
475 | return (address >> PUD_SHIFT) & (PTRS_PER_PUD - 1); | |
476 | } | |
3d081b18 JF |
477 | |
478 | static inline pud_t *pud_offset(pgd_t *pgd, unsigned long address) | |
479 | { | |
480 | return (pud_t *)pgd_page_vaddr(*pgd) + pud_index(address); | |
481 | } | |
30f10316 JF |
482 | |
483 | static inline int pgd_bad(pgd_t pgd) | |
484 | { | |
18a7a199 | 485 | return (pgd_flags(pgd) & ~_PAGE_USER) != _KERNPG_TABLE; |
30f10316 | 486 | } |
7325cc2e JF |
487 | |
488 | static inline int pgd_none(pgd_t pgd) | |
489 | { | |
26c8e317 | 490 | return !native_pgd_val(pgd); |
7325cc2e | 491 | } |
9f38d7e8 JF |
492 | #endif /* PAGETABLE_LEVELS > 3 */ |
493 | ||
4614139c JF |
494 | #endif /* __ASSEMBLY__ */ |
495 | ||
fb15a9b3 JF |
496 | /* |
497 | * the pgd page can be thought of an array like this: pgd_t[PTRS_PER_PGD] | |
498 | * | |
499 | * this macro returns the index of the entry in the pgd page which would | |
500 | * control the given virtual address | |
501 | */ | |
502 | #define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1)) | |
503 | ||
504 | /* | |
505 | * pgd_offset() returns a (pgd_t *) | |
506 | * pgd_index() is used get the offset into the pgd page's array of pgd_t's; | |
507 | */ | |
508 | #define pgd_offset(mm, address) ((mm)->pgd + pgd_index((address))) | |
509 | /* | |
510 | * a shortcut which implies the use of the kernel's pgd, instead | |
511 | * of a process's | |
512 | */ | |
513 | #define pgd_offset_k(address) pgd_offset(&init_mm, (address)) | |
514 | ||
515 | ||
68db065c JF |
516 | #define KERNEL_PGD_BOUNDARY pgd_index(PAGE_OFFSET) |
517 | #define KERNEL_PGD_PTRS (PTRS_PER_PGD - KERNEL_PGD_BOUNDARY) | |
518 | ||
195466dc JF |
519 | #ifndef __ASSEMBLY__ |
520 | ||
2c1b284e JSR |
521 | extern int direct_gbpages; |
522 | ||
4891645e JF |
523 | /* local pte updates need not use xchg for locking */ |
524 | static inline pte_t native_local_ptep_get_and_clear(pte_t *ptep) | |
525 | { | |
526 | pte_t res = *ptep; | |
527 | ||
528 | /* Pure native function needs no input for mm, addr */ | |
529 | native_pte_clear(NULL, 0, ptep); | |
530 | return res; | |
531 | } | |
532 | ||
533 | static inline void native_set_pte_at(struct mm_struct *mm, unsigned long addr, | |
534 | pte_t *ptep , pte_t pte) | |
535 | { | |
536 | native_set_pte(ptep, pte); | |
537 | } | |
538 | ||
195466dc JF |
539 | #ifndef CONFIG_PARAVIRT |
540 | /* | |
541 | * Rules for using pte_update - it must be called after any PTE update which | |
542 | * has not been done using the set_pte / clear_pte interfaces. It is used by | |
543 | * shadow mode hypervisors to resynchronize the shadow page tables. Kernel PTE | |
544 | * updates should either be sets, clears, or set_pte_atomic for P->P | |
545 | * transitions, which means this hook should only be called for user PTEs. | |
546 | * This hook implies a P->P protection or access change has taken place, which | |
547 | * requires a subsequent TLB flush. The notification can optionally be delayed | |
548 | * until the TLB flush event by using the pte_update_defer form of the | |
549 | * interface, but care must be taken to assure that the flush happens while | |
550 | * still holding the same page table lock so that the shadow and primary pages | |
551 | * do not become out of sync on SMP. | |
552 | */ | |
553 | #define pte_update(mm, addr, ptep) do { } while (0) | |
554 | #define pte_update_defer(mm, addr, ptep) do { } while (0) | |
555 | #endif | |
556 | ||
195466dc JF |
557 | /* |
558 | * We only update the dirty/accessed state if we set | |
559 | * the dirty bit by hand in the kernel, since the hardware | |
560 | * will do the accessed bit for us, and we don't want to | |
561 | * race with other CPU's that might be updating the dirty | |
562 | * bit at the same time. | |
563 | */ | |
bea41808 JF |
564 | struct vm_area_struct; |
565 | ||
195466dc | 566 | #define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS |
ee5aa8d3 JF |
567 | extern int ptep_set_access_flags(struct vm_area_struct *vma, |
568 | unsigned long address, pte_t *ptep, | |
569 | pte_t entry, int dirty); | |
195466dc JF |
570 | |
571 | #define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG | |
f9fbf1a3 JF |
572 | extern int ptep_test_and_clear_young(struct vm_area_struct *vma, |
573 | unsigned long addr, pte_t *ptep); | |
195466dc JF |
574 | |
575 | #define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH | |
c20311e1 JF |
576 | extern int ptep_clear_flush_young(struct vm_area_struct *vma, |
577 | unsigned long address, pte_t *ptep); | |
195466dc JF |
578 | |
579 | #define __HAVE_ARCH_PTEP_GET_AND_CLEAR | |
3cbaeafe JP |
580 | static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, |
581 | pte_t *ptep) | |
195466dc JF |
582 | { |
583 | pte_t pte = native_ptep_get_and_clear(ptep); | |
584 | pte_update(mm, addr, ptep); | |
585 | return pte; | |
586 | } | |
587 | ||
588 | #define __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL | |
3cbaeafe JP |
589 | static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm, |
590 | unsigned long addr, pte_t *ptep, | |
591 | int full) | |
195466dc JF |
592 | { |
593 | pte_t pte; | |
594 | if (full) { | |
595 | /* | |
596 | * Full address destruction in progress; paravirt does not | |
597 | * care about updates and native needs no locking | |
598 | */ | |
599 | pte = native_local_ptep_get_and_clear(ptep); | |
600 | } else { | |
601 | pte = ptep_get_and_clear(mm, addr, ptep); | |
602 | } | |
603 | return pte; | |
604 | } | |
605 | ||
606 | #define __HAVE_ARCH_PTEP_SET_WRPROTECT | |
3cbaeafe JP |
607 | static inline void ptep_set_wrprotect(struct mm_struct *mm, |
608 | unsigned long addr, pte_t *ptep) | |
195466dc | 609 | { |
d8d89827 | 610 | clear_bit(_PAGE_BIT_RW, (unsigned long *)&ptep->pte); |
195466dc JF |
611 | pte_update(mm, addr, ptep); |
612 | } | |
613 | ||
85958b46 JF |
614 | /* |
615 | * clone_pgd_range(pgd_t *dst, pgd_t *src, int count); | |
616 | * | |
617 | * dst - pointer to pgd range anwhere on a pgd page | |
618 | * src - "" | |
619 | * count - the number of pgds to copy. | |
620 | * | |
621 | * dst and src can be on the same page, but the range must not overlap, | |
622 | * and must not cross a page boundary. | |
623 | */ | |
624 | static inline void clone_pgd_range(pgd_t *dst, pgd_t *src, int count) | |
625 | { | |
626 | memcpy(dst, src, count * sizeof(pgd_t)); | |
627 | } | |
628 | ||
629 | ||
195466dc JF |
630 | #include <asm-generic/pgtable.h> |
631 | #endif /* __ASSEMBLY__ */ | |
632 | ||
1965aae3 | 633 | #endif /* _ASM_X86_PGTABLE_H */ |