Rev 6936 | Details | Compare with Previous | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
---|---|---|---|
5270 | serge | 1 | #ifndef _ASM_X86_PGTABLE_H |
2 | #define _ASM_X86_PGTABLE_H |
||
3 | |||
4 | #include |
||
5 | #include |
||
6 | |||
7 | #include |
||
8 | |||
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) | \ |
||
15 | cachemode2protval(_PAGE_CACHE_MODE_UC_MINUS))) \ |
||
16 | : (prot)) |
||
17 | |||
18 | #ifndef __ASSEMBLY__ |
||
19 | #include |
||
20 | |||
21 | void ptdump_walk_pgd_level(struct seq_file *m, pgd_t *pgd); |
||
6082 | serge | 22 | void ptdump_walk_pgd_level_checkwx(void); |
5270 | serge | 23 | |
6082 | serge | 24 | #ifdef CONFIG_DEBUG_WX |
25 | #define debug_checkwx() ptdump_walk_pgd_level_checkwx() |
||
26 | #else |
||
27 | #define debug_checkwx() do { } while (0) |
||
28 | #endif |
||
29 | |||
5270 | serge | 30 | /* |
31 | * ZERO_PAGE is a global shared page that is always zero: used |
||
32 | * for zero-mapped memory areas etc.. |
||
33 | */ |
||
34 | extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)] |
||
35 | __visible; |
||
36 | #define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page)) |
||
37 | |||
38 | extern spinlock_t pgd_lock; |
||
39 | extern struct list_head pgd_list; |
||
40 | |||
41 | extern struct mm_struct *pgd_page_get_mm(struct page *page); |
||
42 | |||
43 | #ifdef CONFIG_PARAVIRT |
||
44 | #include |
||
45 | #else /* !CONFIG_PARAVIRT */ |
||
46 | #define set_pte(ptep, pte) native_set_pte(ptep, pte) |
||
47 | #define set_pte_at(mm, addr, ptep, pte) native_set_pte_at(mm, addr, ptep, pte) |
||
48 | #define set_pmd_at(mm, addr, pmdp, pmd) native_set_pmd_at(mm, addr, pmdp, pmd) |
||
49 | |||
50 | #define set_pte_atomic(ptep, pte) \ |
||
51 | native_set_pte_atomic(ptep, pte) |
||
52 | |||
53 | #define set_pmd(pmdp, pmd) native_set_pmd(pmdp, pmd) |
||
54 | |||
55 | #ifndef __PAGETABLE_PUD_FOLDED |
||
56 | #define set_pgd(pgdp, pgd) native_set_pgd(pgdp, pgd) |
||
57 | #define pgd_clear(pgd) native_pgd_clear(pgd) |
||
58 | #endif |
||
59 | |||
60 | #ifndef set_pud |
||
61 | # define set_pud(pudp, pud) native_set_pud(pudp, pud) |
||
62 | #endif |
||
63 | |||
64 | #ifndef __PAGETABLE_PMD_FOLDED |
||
65 | #define pud_clear(pud) native_pud_clear(pud) |
||
66 | #endif |
||
67 | |||
68 | #define pte_clear(mm, addr, ptep) native_pte_clear(mm, addr, ptep) |
||
69 | #define pmd_clear(pmd) native_pmd_clear(pmd) |
||
70 | |||
71 | #define pte_update(mm, addr, ptep) do { } while (0) |
||
72 | |||
73 | #define pgd_val(x) native_pgd_val(x) |
||
74 | #define __pgd(x) native_make_pgd(x) |
||
75 | |||
76 | #ifndef __PAGETABLE_PUD_FOLDED |
||
77 | #define pud_val(x) native_pud_val(x) |
||
78 | #define __pud(x) native_make_pud(x) |
||
79 | #endif |
||
80 | |||
81 | #ifndef __PAGETABLE_PMD_FOLDED |
||
82 | #define pmd_val(x) native_pmd_val(x) |
||
83 | #define __pmd(x) native_make_pmd(x) |
||
84 | #endif |
||
85 | |||
86 | #define pte_val(x) native_pte_val(x) |
||
87 | #define __pte(x) native_make_pte(x) |
||
88 | |||
89 | #define arch_end_context_switch(prev) do {} while(0) |
||
90 | |||
91 | #endif /* CONFIG_PARAVIRT */ |
||
92 | |||
93 | /* |
||
94 | * The following only work if pte_present() is true. |
||
95 | * Undefined behaviour if not.. |
||
96 | */ |
||
97 | static inline int pte_dirty(pte_t pte) |
||
98 | { |
||
99 | return pte_flags(pte) & _PAGE_DIRTY; |
||
100 | } |
||
101 | |||
102 | static inline int pte_young(pte_t pte) |
||
103 | { |
||
104 | return pte_flags(pte) & _PAGE_ACCESSED; |
||
105 | } |
||
106 | |||
107 | static inline int pmd_dirty(pmd_t pmd) |
||
108 | { |
||
109 | return pmd_flags(pmd) & _PAGE_DIRTY; |
||
110 | } |
||
111 | |||
112 | static inline int pmd_young(pmd_t pmd) |
||
113 | { |
||
114 | return pmd_flags(pmd) & _PAGE_ACCESSED; |
||
115 | } |
||
116 | |||
117 | static inline int pte_write(pte_t pte) |
||
118 | { |
||
119 | return pte_flags(pte) & _PAGE_RW; |
||
120 | } |
||
121 | |||
122 | static inline int pte_huge(pte_t pte) |
||
123 | { |
||
124 | return pte_flags(pte) & _PAGE_PSE; |
||
125 | } |
||
126 | |||
127 | static inline int pte_global(pte_t pte) |
||
128 | { |
||
129 | return pte_flags(pte) & _PAGE_GLOBAL; |
||
130 | } |
||
131 | |||
132 | static inline int pte_exec(pte_t pte) |
||
133 | { |
||
134 | return !(pte_flags(pte) & _PAGE_NX); |
||
135 | } |
||
136 | |||
137 | static inline int pte_special(pte_t pte) |
||
138 | { |
||
6082 | serge | 139 | return pte_flags(pte) & _PAGE_SPECIAL; |
5270 | serge | 140 | } |
141 | |||
142 | static inline unsigned long pte_pfn(pte_t pte) |
||
143 | { |
||
144 | return (pte_val(pte) & PTE_PFN_MASK) >> PAGE_SHIFT; |
||
145 | } |
||
146 | |||
147 | static inline unsigned long pmd_pfn(pmd_t pmd) |
||
148 | { |
||
6082 | serge | 149 | return (pmd_val(pmd) & pmd_pfn_mask(pmd)) >> PAGE_SHIFT; |
5270 | serge | 150 | } |
151 | |||
152 | static inline unsigned long pud_pfn(pud_t pud) |
||
153 | { |
||
6082 | serge | 154 | return (pud_val(pud) & pud_pfn_mask(pud)) >> PAGE_SHIFT; |
5270 | serge | 155 | } |
156 | |||
157 | #define pte_page(pte) pfn_to_page(pte_pfn(pte)) |
||
158 | |||
159 | static inline int pmd_large(pmd_t pte) |
||
160 | { |
||
161 | return pmd_flags(pte) & _PAGE_PSE; |
||
162 | } |
||
163 | |||
164 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
||
165 | static inline int pmd_trans_huge(pmd_t pmd) |
||
166 | { |
||
6936 | serge | 167 | return (pmd_val(pmd) & (_PAGE_PSE|_PAGE_DEVMAP)) == _PAGE_PSE; |
5270 | serge | 168 | } |
169 | |||
170 | static inline int has_transparent_hugepage(void) |
||
171 | { |
||
172 | return cpu_has_pse; |
||
173 | } |
||
6936 | serge | 174 | |
175 | #ifdef __HAVE_ARCH_PTE_DEVMAP |
||
176 | static inline int pmd_devmap(pmd_t pmd) |
||
177 | { |
||
178 | return !!(pmd_val(pmd) & _PAGE_DEVMAP); |
||
179 | } |
||
180 | #endif |
||
5270 | serge | 181 | #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ |
182 | |||
183 | static inline pte_t pte_set_flags(pte_t pte, pteval_t set) |
||
184 | { |
||
185 | pteval_t v = native_pte_val(pte); |
||
186 | |||
187 | return native_make_pte(v | set); |
||
188 | } |
||
189 | |||
190 | static inline pte_t pte_clear_flags(pte_t pte, pteval_t clear) |
||
191 | { |
||
192 | pteval_t v = native_pte_val(pte); |
||
193 | |||
194 | return native_make_pte(v & ~clear); |
||
195 | } |
||
196 | |||
197 | static inline pte_t pte_mkclean(pte_t pte) |
||
198 | { |
||
199 | return pte_clear_flags(pte, _PAGE_DIRTY); |
||
200 | } |
||
201 | |||
202 | static inline pte_t pte_mkold(pte_t pte) |
||
203 | { |
||
204 | return pte_clear_flags(pte, _PAGE_ACCESSED); |
||
205 | } |
||
206 | |||
207 | static inline pte_t pte_wrprotect(pte_t pte) |
||
208 | { |
||
209 | return pte_clear_flags(pte, _PAGE_RW); |
||
210 | } |
||
211 | |||
212 | static inline pte_t pte_mkexec(pte_t pte) |
||
213 | { |
||
214 | return pte_clear_flags(pte, _PAGE_NX); |
||
215 | } |
||
216 | |||
217 | static inline pte_t pte_mkdirty(pte_t pte) |
||
218 | { |
||
219 | return pte_set_flags(pte, _PAGE_DIRTY | _PAGE_SOFT_DIRTY); |
||
220 | } |
||
221 | |||
222 | static inline pte_t pte_mkyoung(pte_t pte) |
||
223 | { |
||
224 | return pte_set_flags(pte, _PAGE_ACCESSED); |
||
225 | } |
||
226 | |||
227 | static inline pte_t pte_mkwrite(pte_t pte) |
||
228 | { |
||
229 | return pte_set_flags(pte, _PAGE_RW); |
||
230 | } |
||
231 | |||
232 | static inline pte_t pte_mkhuge(pte_t pte) |
||
233 | { |
||
234 | return pte_set_flags(pte, _PAGE_PSE); |
||
235 | } |
||
236 | |||
237 | static inline pte_t pte_clrhuge(pte_t pte) |
||
238 | { |
||
239 | return pte_clear_flags(pte, _PAGE_PSE); |
||
240 | } |
||
241 | |||
242 | static inline pte_t pte_mkglobal(pte_t pte) |
||
243 | { |
||
244 | return pte_set_flags(pte, _PAGE_GLOBAL); |
||
245 | } |
||
246 | |||
247 | static inline pte_t pte_clrglobal(pte_t pte) |
||
248 | { |
||
249 | return pte_clear_flags(pte, _PAGE_GLOBAL); |
||
250 | } |
||
251 | |||
252 | static inline pte_t pte_mkspecial(pte_t pte) |
||
253 | { |
||
254 | return pte_set_flags(pte, _PAGE_SPECIAL); |
||
255 | } |
||
256 | |||
6936 | serge | 257 | static inline pte_t pte_mkdevmap(pte_t pte) |
258 | { |
||
259 | return pte_set_flags(pte, _PAGE_SPECIAL|_PAGE_DEVMAP); |
||
260 | } |
||
261 | |||
5270 | serge | 262 | static inline pmd_t pmd_set_flags(pmd_t pmd, pmdval_t set) |
263 | { |
||
264 | pmdval_t v = native_pmd_val(pmd); |
||
265 | |||
266 | return __pmd(v | set); |
||
267 | } |
||
268 | |||
269 | static inline pmd_t pmd_clear_flags(pmd_t pmd, pmdval_t clear) |
||
270 | { |
||
271 | pmdval_t v = native_pmd_val(pmd); |
||
272 | |||
273 | return __pmd(v & ~clear); |
||
274 | } |
||
275 | |||
276 | static inline pmd_t pmd_mkold(pmd_t pmd) |
||
277 | { |
||
278 | return pmd_clear_flags(pmd, _PAGE_ACCESSED); |
||
279 | } |
||
280 | |||
6936 | serge | 281 | static inline pmd_t pmd_mkclean(pmd_t pmd) |
282 | { |
||
283 | return pmd_clear_flags(pmd, _PAGE_DIRTY); |
||
284 | } |
||
285 | |||
5270 | serge | 286 | static inline pmd_t pmd_wrprotect(pmd_t pmd) |
287 | { |
||
288 | return pmd_clear_flags(pmd, _PAGE_RW); |
||
289 | } |
||
290 | |||
291 | static inline pmd_t pmd_mkdirty(pmd_t pmd) |
||
292 | { |
||
293 | return pmd_set_flags(pmd, _PAGE_DIRTY | _PAGE_SOFT_DIRTY); |
||
294 | } |
||
295 | |||
6936 | serge | 296 | static inline pmd_t pmd_mkdevmap(pmd_t pmd) |
297 | { |
||
298 | return pmd_set_flags(pmd, _PAGE_DEVMAP); |
||
299 | } |
||
300 | |||
5270 | serge | 301 | static inline pmd_t pmd_mkhuge(pmd_t pmd) |
302 | { |
||
303 | return pmd_set_flags(pmd, _PAGE_PSE); |
||
304 | } |
||
305 | |||
306 | static inline pmd_t pmd_mkyoung(pmd_t pmd) |
||
307 | { |
||
308 | return pmd_set_flags(pmd, _PAGE_ACCESSED); |
||
309 | } |
||
310 | |||
311 | static inline pmd_t pmd_mkwrite(pmd_t pmd) |
||
312 | { |
||
313 | return pmd_set_flags(pmd, _PAGE_RW); |
||
314 | } |
||
315 | |||
316 | static inline pmd_t pmd_mknotpresent(pmd_t pmd) |
||
317 | { |
||
6082 | serge | 318 | return pmd_clear_flags(pmd, _PAGE_PRESENT | _PAGE_PROTNONE); |
5270 | serge | 319 | } |
320 | |||
321 | #ifdef CONFIG_HAVE_ARCH_SOFT_DIRTY |
||
322 | static inline int pte_soft_dirty(pte_t pte) |
||
323 | { |
||
324 | return pte_flags(pte) & _PAGE_SOFT_DIRTY; |
||
325 | } |
||
326 | |||
327 | static inline int pmd_soft_dirty(pmd_t pmd) |
||
328 | { |
||
329 | return pmd_flags(pmd) & _PAGE_SOFT_DIRTY; |
||
330 | } |
||
331 | |||
332 | static inline pte_t pte_mksoft_dirty(pte_t pte) |
||
333 | { |
||
334 | return pte_set_flags(pte, _PAGE_SOFT_DIRTY); |
||
335 | } |
||
336 | |||
337 | static inline pmd_t pmd_mksoft_dirty(pmd_t pmd) |
||
338 | { |
||
339 | return pmd_set_flags(pmd, _PAGE_SOFT_DIRTY); |
||
340 | } |
||
341 | |||
6082 | serge | 342 | static inline pte_t pte_clear_soft_dirty(pte_t pte) |
5270 | serge | 343 | { |
344 | return pte_clear_flags(pte, _PAGE_SOFT_DIRTY); |
||
345 | } |
||
346 | |||
6082 | serge | 347 | static inline pmd_t pmd_clear_soft_dirty(pmd_t pmd) |
5270 | serge | 348 | { |
6082 | serge | 349 | return pmd_clear_flags(pmd, _PAGE_SOFT_DIRTY); |
5270 | serge | 350 | } |
351 | |||
352 | #endif /* CONFIG_HAVE_ARCH_SOFT_DIRTY */ |
||
353 | |||
354 | /* |
||
355 | * Mask out unsupported bits in a present pgprot. Non-present pgprots |
||
356 | * can use those bits for other purposes, so leave them be. |
||
357 | */ |
||
358 | static inline pgprotval_t massage_pgprot(pgprot_t pgprot) |
||
359 | { |
||
360 | pgprotval_t protval = pgprot_val(pgprot); |
||
361 | |||
362 | if (protval & _PAGE_PRESENT) |
||
363 | protval &= __supported_pte_mask; |
||
364 | |||
365 | return protval; |
||
366 | } |
||
367 | |||
368 | static inline pte_t pfn_pte(unsigned long page_nr, pgprot_t pgprot) |
||
369 | { |
||
370 | return __pte(((phys_addr_t)page_nr << PAGE_SHIFT) | |
||
371 | massage_pgprot(pgprot)); |
||
372 | } |
||
373 | |||
374 | static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot) |
||
375 | { |
||
376 | return __pmd(((phys_addr_t)page_nr << PAGE_SHIFT) | |
||
377 | massage_pgprot(pgprot)); |
||
378 | } |
||
379 | |||
380 | static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) |
||
381 | { |
||
382 | pteval_t val = pte_val(pte); |
||
383 | |||
384 | /* |
||
385 | * Chop off the NX bit (if present), and add the NX portion of |
||
386 | * the newprot (if present): |
||
387 | */ |
||
388 | val &= _PAGE_CHG_MASK; |
||
389 | val |= massage_pgprot(newprot) & ~_PAGE_CHG_MASK; |
||
390 | |||
391 | return __pte(val); |
||
392 | } |
||
393 | |||
394 | static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot) |
||
395 | { |
||
396 | pmdval_t val = pmd_val(pmd); |
||
397 | |||
398 | val &= _HPAGE_CHG_MASK; |
||
399 | val |= massage_pgprot(newprot) & ~_HPAGE_CHG_MASK; |
||
400 | |||
401 | return __pmd(val); |
||
402 | } |
||
403 | |||
404 | /* mprotect needs to preserve PAT bits when updating vm_page_prot */ |
||
405 | #define pgprot_modify pgprot_modify |
||
406 | static inline pgprot_t pgprot_modify(pgprot_t oldprot, pgprot_t newprot) |
||
407 | { |
||
408 | pgprotval_t preservebits = pgprot_val(oldprot) & _PAGE_CHG_MASK; |
||
409 | pgprotval_t addbits = pgprot_val(newprot); |
||
410 | return __pgprot(preservebits | addbits); |
||
411 | } |
||
412 | |||
6082 | serge | 413 | #define pte_pgprot(x) __pgprot(pte_flags(x)) |
414 | #define pmd_pgprot(x) __pgprot(pmd_flags(x)) |
||
415 | #define pud_pgprot(x) __pgprot(pud_flags(x)) |
||
5270 | serge | 416 | |
417 | #define canon_pgprot(p) __pgprot(massage_pgprot(p)) |
||
418 | |||
419 | static inline int is_new_memtype_allowed(u64 paddr, unsigned long size, |
||
420 | enum page_cache_mode pcm, |
||
421 | enum page_cache_mode new_pcm) |
||
422 | { |
||
423 | /* |
||
424 | * PAT type is always WB for untracked ranges, so no need to check. |
||
425 | */ |
||
426 | if (x86_platform.is_untracked_pat_range(paddr, paddr + size)) |
||
427 | return 1; |
||
428 | |||
429 | /* |
||
430 | * Certain new memtypes are not allowed with certain |
||
431 | * requested memtype: |
||
432 | * - request is uncached, return cannot be write-back |
||
433 | * - request is write-combine, return cannot be write-back |
||
6082 | serge | 434 | * - request is write-through, return cannot be write-back |
435 | * - request is write-through, return cannot be write-combine |
||
5270 | serge | 436 | */ |
437 | if ((pcm == _PAGE_CACHE_MODE_UC_MINUS && |
||
438 | new_pcm == _PAGE_CACHE_MODE_WB) || |
||
439 | (pcm == _PAGE_CACHE_MODE_WC && |
||
6082 | serge | 440 | new_pcm == _PAGE_CACHE_MODE_WB) || |
441 | (pcm == _PAGE_CACHE_MODE_WT && |
||
442 | new_pcm == _PAGE_CACHE_MODE_WB) || |
||
443 | (pcm == _PAGE_CACHE_MODE_WT && |
||
444 | new_pcm == _PAGE_CACHE_MODE_WC)) { |
||
5270 | serge | 445 | return 0; |
446 | } |
||
447 | |||
448 | return 1; |
||
449 | } |
||
450 | |||
451 | pmd_t *populate_extra_pmd(unsigned long vaddr); |
||
452 | pte_t *populate_extra_pte(unsigned long vaddr); |
||
453 | #endif /* __ASSEMBLY__ */ |
||
454 | |||
455 | #ifdef CONFIG_X86_32 |
||
456 | # include |
||
457 | #else |
||
458 | # include |
||
459 | #endif |
||
460 | |||
461 | #ifndef __ASSEMBLY__ |
||
462 | //#include |
||
463 | #include |
||
464 | #include |
||
465 | |||
466 | static inline int pte_none(pte_t pte) |
||
467 | { |
||
468 | return !pte.pte; |
||
469 | } |
||
470 | |||
471 | #define __HAVE_ARCH_PTE_SAME |
||
472 | static inline int pte_same(pte_t a, pte_t b) |
||
473 | { |
||
474 | return a.pte == b.pte; |
||
475 | } |
||
476 | |||
477 | static inline int pte_present(pte_t a) |
||
478 | { |
||
479 | return pte_flags(a) & (_PAGE_PRESENT | _PAGE_PROTNONE); |
||
480 | } |
||
481 | |||
6936 | serge | 482 | #ifdef __HAVE_ARCH_PTE_DEVMAP |
483 | static inline int pte_devmap(pte_t a) |
||
484 | { |
||
485 | return (pte_flags(a) & _PAGE_DEVMAP) == _PAGE_DEVMAP; |
||
486 | } |
||
487 | #endif |
||
488 | |||
5270 | serge | 489 | #define pte_accessible pte_accessible |
490 | |||
491 | static inline int pte_hidden(pte_t pte) |
||
492 | { |
||
493 | return pte_flags(pte) & _PAGE_HIDDEN; |
||
494 | } |
||
495 | |||
496 | static inline int pmd_present(pmd_t pmd) |
||
497 | { |
||
498 | /* |
||
499 | * Checking for _PAGE_PSE is needed too because |
||
500 | * split_huge_page will temporarily clear the present bit (but |
||
501 | * the _PAGE_PSE flag will remain set at all times while the |
||
502 | * _PAGE_PRESENT bit is clear). |
||
503 | */ |
||
6082 | serge | 504 | return pmd_flags(pmd) & (_PAGE_PRESENT | _PAGE_PROTNONE | _PAGE_PSE); |
5270 | serge | 505 | } |
506 | |||
6082 | serge | 507 | #ifdef CONFIG_NUMA_BALANCING |
508 | /* |
||
509 | * These work without NUMA balancing but the kernel does not care. See the |
||
510 | * comment in include/asm-generic/pgtable.h |
||
511 | */ |
||
512 | static inline int pte_protnone(pte_t pte) |
||
513 | { |
||
514 | return (pte_flags(pte) & (_PAGE_PROTNONE | _PAGE_PRESENT)) |
||
515 | == _PAGE_PROTNONE; |
||
516 | } |
||
517 | |||
518 | static inline int pmd_protnone(pmd_t pmd) |
||
519 | { |
||
520 | return (pmd_flags(pmd) & (_PAGE_PROTNONE | _PAGE_PRESENT)) |
||
521 | == _PAGE_PROTNONE; |
||
522 | } |
||
523 | #endif /* CONFIG_NUMA_BALANCING */ |
||
524 | |||
5270 | serge | 525 | static inline int pmd_none(pmd_t pmd) |
526 | { |
||
527 | /* Only check low word on 32-bit platforms, since it might be |
||
528 | out of sync with upper half. */ |
||
529 | return (unsigned long)native_pmd_val(pmd) == 0; |
||
530 | } |
||
531 | |||
532 | static inline unsigned long pmd_page_vaddr(pmd_t pmd) |
||
533 | { |
||
6082 | serge | 534 | return (unsigned long)__va(pmd_val(pmd) & pmd_pfn_mask(pmd)); |
5270 | serge | 535 | } |
536 | |||
537 | /* |
||
538 | * Currently stuck as a macro due to indirect forward reference to |
||
539 | * linux/mmzone.h's __section_mem_map_addr() definition: |
||
540 | */ |
||
6082 | serge | 541 | #define pmd_page(pmd) \ |
542 | pfn_to_page((pmd_val(pmd) & pmd_pfn_mask(pmd)) >> PAGE_SHIFT) |
||
5270 | serge | 543 | |
544 | /* |
||
545 | * the pmd page can be thought of an array like this: pmd_t[PTRS_PER_PMD] |
||
546 | * |
||
547 | * this macro returns the index of the entry in the pmd page which would |
||
548 | * control the given virtual address |
||
549 | */ |
||
550 | static inline unsigned long pmd_index(unsigned long address) |
||
551 | { |
||
552 | return (address >> PMD_SHIFT) & (PTRS_PER_PMD - 1); |
||
553 | } |
||
554 | |||
555 | /* |
||
556 | * Conversion functions: convert a page and protection to a page entry, |
||
557 | * and a page entry and page directory to the page they refer to. |
||
558 | * |
||
559 | * (Currently stuck as a macro because of indirect forward reference |
||
560 | * to linux/mm.h:page_to_nid()) |
||
561 | */ |
||
562 | #define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot)) |
||
563 | |||
564 | /* |
||
565 | * the pte page can be thought of an array like this: pte_t[PTRS_PER_PTE] |
||
566 | * |
||
567 | * this function returns the index of the entry in the pte page which would |
||
568 | * control the given virtual address |
||
569 | */ |
||
570 | static inline unsigned long pte_index(unsigned long address) |
||
571 | { |
||
572 | return (address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1); |
||
573 | } |
||
574 | |||
575 | static inline pte_t *pte_offset_kernel(pmd_t *pmd, unsigned long address) |
||
576 | { |
||
577 | return (pte_t *)pmd_page_vaddr(*pmd) + pte_index(address); |
||
578 | } |
||
579 | |||
580 | static inline int pmd_bad(pmd_t pmd) |
||
581 | { |
||
582 | return (pmd_flags(pmd) & ~_PAGE_USER) != _KERNPG_TABLE; |
||
583 | } |
||
584 | |||
585 | static inline unsigned long pages_to_mb(unsigned long npg) |
||
586 | { |
||
587 | return npg >> (20 - PAGE_SHIFT); |
||
588 | } |
||
589 | |||
6082 | serge | 590 | #if CONFIG_PGTABLE_LEVELS > 2 |
5270 | serge | 591 | static inline int pud_none(pud_t pud) |
592 | { |
||
593 | return native_pud_val(pud) == 0; |
||
594 | } |
||
595 | |||
596 | static inline int pud_present(pud_t pud) |
||
597 | { |
||
598 | return pud_flags(pud) & _PAGE_PRESENT; |
||
599 | } |
||
600 | |||
601 | static inline unsigned long pud_page_vaddr(pud_t pud) |
||
602 | { |
||
6082 | serge | 603 | return (unsigned long)__va(pud_val(pud) & pud_pfn_mask(pud)); |
5270 | serge | 604 | } |
605 | |||
606 | /* |
||
607 | * Currently stuck as a macro due to indirect forward reference to |
||
608 | * linux/mmzone.h's __section_mem_map_addr() definition: |
||
609 | */ |
||
6082 | serge | 610 | #define pud_page(pud) \ |
611 | pfn_to_page((pud_val(pud) & pud_pfn_mask(pud)) >> PAGE_SHIFT) |
||
5270 | serge | 612 | |
613 | /* Find an entry in the second-level page table.. */ |
||
614 | static inline pmd_t *pmd_offset(pud_t *pud, unsigned long address) |
||
615 | { |
||
616 | return (pmd_t *)pud_page_vaddr(*pud) + pmd_index(address); |
||
617 | } |
||
618 | |||
619 | static inline int pud_large(pud_t pud) |
||
620 | { |
||
621 | return (pud_val(pud) & (_PAGE_PSE | _PAGE_PRESENT)) == |
||
622 | (_PAGE_PSE | _PAGE_PRESENT); |
||
623 | } |
||
624 | |||
625 | static inline int pud_bad(pud_t pud) |
||
626 | { |
||
627 | return (pud_flags(pud) & ~(_KERNPG_TABLE | _PAGE_USER)) != 0; |
||
628 | } |
||
629 | #else |
||
630 | static inline int pud_large(pud_t pud) |
||
631 | { |
||
632 | return 0; |
||
633 | } |
||
6082 | serge | 634 | #endif /* CONFIG_PGTABLE_LEVELS > 2 */ |
5270 | serge | 635 | |
6082 | serge | 636 | #if CONFIG_PGTABLE_LEVELS > 3 |
5270 | serge | 637 | static inline int pgd_present(pgd_t pgd) |
638 | { |
||
639 | return pgd_flags(pgd) & _PAGE_PRESENT; |
||
640 | } |
||
641 | |||
642 | static inline unsigned long pgd_page_vaddr(pgd_t pgd) |
||
643 | { |
||
644 | return (unsigned long)__va((unsigned long)pgd_val(pgd) & PTE_PFN_MASK); |
||
645 | } |
||
646 | |||
647 | /* |
||
648 | * Currently stuck as a macro due to indirect forward reference to |
||
649 | * linux/mmzone.h's __section_mem_map_addr() definition: |
||
650 | */ |
||
651 | #define pgd_page(pgd) pfn_to_page(pgd_val(pgd) >> PAGE_SHIFT) |
||
652 | |||
653 | /* to find an entry in a page-table-directory. */ |
||
654 | static inline unsigned long pud_index(unsigned long address) |
||
655 | { |
||
656 | return (address >> PUD_SHIFT) & (PTRS_PER_PUD - 1); |
||
657 | } |
||
658 | |||
659 | static inline pud_t *pud_offset(pgd_t *pgd, unsigned long address) |
||
660 | { |
||
661 | return (pud_t *)pgd_page_vaddr(*pgd) + pud_index(address); |
||
662 | } |
||
663 | |||
664 | static inline int pgd_bad(pgd_t pgd) |
||
665 | { |
||
666 | return (pgd_flags(pgd) & ~_PAGE_USER) != _KERNPG_TABLE; |
||
667 | } |
||
668 | |||
669 | static inline int pgd_none(pgd_t pgd) |
||
670 | { |
||
671 | return !native_pgd_val(pgd); |
||
672 | } |
||
6082 | serge | 673 | #endif /* CONFIG_PGTABLE_LEVELS > 3 */ |
5270 | serge | 674 | |
675 | #endif /* __ASSEMBLY__ */ |
||
676 | |||
677 | /* |
||
678 | * the pgd page can be thought of an array like this: pgd_t[PTRS_PER_PGD] |
||
679 | * |
||
680 | * this macro returns the index of the entry in the pgd page which would |
||
681 | * control the given virtual address |
||
682 | */ |
||
683 | #define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1)) |
||
684 | |||
685 | /* |
||
686 | * pgd_offset() returns a (pgd_t *) |
||
687 | * pgd_index() is used get the offset into the pgd page's array of pgd_t's; |
||
688 | */ |
||
689 | #define pgd_offset(mm, address) ((mm)->pgd + pgd_index((address))) |
||
690 | /* |
||
691 | * a shortcut which implies the use of the kernel's pgd, instead |
||
692 | * of a process's |
||
693 | */ |
||
694 | #define pgd_offset_k(address) pgd_offset(&init_mm, (address)) |
||
695 | |||
696 | |||
697 | #define KERNEL_PGD_BOUNDARY pgd_index(PAGE_OFFSET) |
||
698 | #define KERNEL_PGD_PTRS (PTRS_PER_PGD - KERNEL_PGD_BOUNDARY) |
||
699 | |||
700 | #ifndef __ASSEMBLY__ |
||
701 | |||
702 | extern int direct_gbpages; |
||
703 | void init_mem_mapping(void); |
||
704 | void early_alloc_pgt_buf(void); |
||
705 | |||
706 | /* local pte updates need not use xchg for locking */ |
||
707 | static inline pte_t native_local_ptep_get_and_clear(pte_t *ptep) |
||
708 | { |
||
709 | pte_t res = *ptep; |
||
710 | |||
711 | /* Pure native function needs no input for mm, addr */ |
||
712 | native_pte_clear(NULL, 0, ptep); |
||
713 | return res; |
||
714 | } |
||
715 | |||
716 | static inline pmd_t native_local_pmdp_get_and_clear(pmd_t *pmdp) |
||
717 | { |
||
718 | pmd_t res = *pmdp; |
||
719 | |||
720 | native_pmd_clear(pmdp); |
||
721 | return res; |
||
722 | } |
||
723 | |||
724 | static inline void native_set_pte_at(struct mm_struct *mm, unsigned long addr, |
||
725 | pte_t *ptep , pte_t pte) |
||
726 | { |
||
727 | native_set_pte(ptep, pte); |
||
728 | } |
||
729 | |||
730 | static inline void native_set_pmd_at(struct mm_struct *mm, unsigned long addr, |
||
731 | pmd_t *pmdp , pmd_t pmd) |
||
732 | { |
||
733 | native_set_pmd(pmdp, pmd); |
||
734 | } |
||
735 | |||
736 | #ifndef CONFIG_PARAVIRT |
||
737 | /* |
||
738 | * Rules for using pte_update - it must be called after any PTE update which |
||
739 | * has not been done using the set_pte / clear_pte interfaces. It is used by |
||
740 | * shadow mode hypervisors to resynchronize the shadow page tables. Kernel PTE |
||
741 | * updates should either be sets, clears, or set_pte_atomic for P->P |
||
742 | * transitions, which means this hook should only be called for user PTEs. |
||
743 | * This hook implies a P->P protection or access change has taken place, which |
||
6936 | serge | 744 | * requires a subsequent TLB flush. |
5270 | serge | 745 | */ |
746 | #define pte_update(mm, addr, ptep) do { } while (0) |
||
747 | #endif |
||
748 | |||
749 | /* |
||
750 | * We only update the dirty/accessed state if we set |
||
751 | * the dirty bit by hand in the kernel, since the hardware |
||
752 | * will do the accessed bit for us, and we don't want to |
||
753 | * race with other CPU's that might be updating the dirty |
||
754 | * bit at the same time. |
||
755 | */ |
||
756 | struct vm_area_struct; |
||
757 | |||
758 | #define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS |
||
759 | extern int ptep_set_access_flags(struct vm_area_struct *vma, |
||
760 | unsigned long address, pte_t *ptep, |
||
761 | pte_t entry, int dirty); |
||
762 | |||
763 | #define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG |
||
764 | extern int ptep_test_and_clear_young(struct vm_area_struct *vma, |
||
765 | unsigned long addr, pte_t *ptep); |
||
766 | |||
767 | #define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH |
||
768 | extern int ptep_clear_flush_young(struct vm_area_struct *vma, |
||
769 | unsigned long address, pte_t *ptep); |
||
770 | |||
771 | #define __HAVE_ARCH_PTEP_GET_AND_CLEAR |
||
772 | static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, |
||
773 | pte_t *ptep) |
||
774 | { |
||
775 | pte_t pte = native_ptep_get_and_clear(ptep); |
||
776 | pte_update(mm, addr, ptep); |
||
777 | return pte; |
||
778 | } |
||
779 | |||
780 | #define __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL |
||
781 | static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm, |
||
782 | unsigned long addr, pte_t *ptep, |
||
783 | int full) |
||
784 | { |
||
785 | pte_t pte; |
||
786 | if (full) { |
||
787 | /* |
||
788 | * Full address destruction in progress; paravirt does not |
||
789 | * care about updates and native needs no locking |
||
790 | */ |
||
791 | pte = native_local_ptep_get_and_clear(ptep); |
||
792 | } else { |
||
793 | pte = ptep_get_and_clear(mm, addr, ptep); |
||
794 | } |
||
795 | return pte; |
||
796 | } |
||
797 | |||
798 | #define __HAVE_ARCH_PTEP_SET_WRPROTECT |
||
799 | static inline void ptep_set_wrprotect(struct mm_struct *mm, |
||
800 | unsigned long addr, pte_t *ptep) |
||
801 | { |
||
802 | clear_bit(_PAGE_BIT_RW, (unsigned long *)&ptep->pte); |
||
803 | pte_update(mm, addr, ptep); |
||
804 | } |
||
805 | |||
806 | #define flush_tlb_fix_spurious_fault(vma, address) do { } while (0) |
||
807 | |||
808 | #define mk_pmd(page, pgprot) pfn_pmd(page_to_pfn(page), (pgprot)) |
||
809 | |||
810 | #define __HAVE_ARCH_PMDP_SET_ACCESS_FLAGS |
||
811 | extern int pmdp_set_access_flags(struct vm_area_struct *vma, |
||
812 | unsigned long address, pmd_t *pmdp, |
||
813 | pmd_t entry, int dirty); |
||
814 | |||
815 | #define __HAVE_ARCH_PMDP_TEST_AND_CLEAR_YOUNG |
||
816 | extern int pmdp_test_and_clear_young(struct vm_area_struct *vma, |
||
817 | unsigned long addr, pmd_t *pmdp); |
||
818 | |||
819 | #define __HAVE_ARCH_PMDP_CLEAR_YOUNG_FLUSH |
||
820 | extern int pmdp_clear_flush_young(struct vm_area_struct *vma, |
||
821 | unsigned long address, pmd_t *pmdp); |
||
822 | |||
823 | |||
824 | #define __HAVE_ARCH_PMD_WRITE |
||
825 | static inline int pmd_write(pmd_t pmd) |
||
826 | { |
||
827 | return pmd_flags(pmd) & _PAGE_RW; |
||
828 | } |
||
829 | |||
6082 | serge | 830 | #define __HAVE_ARCH_PMDP_HUGE_GET_AND_CLEAR |
831 | static inline pmd_t pmdp_huge_get_and_clear(struct mm_struct *mm, unsigned long addr, |
||
5270 | serge | 832 | pmd_t *pmdp) |
833 | { |
||
6936 | serge | 834 | return native_pmdp_get_and_clear(pmdp); |
5270 | serge | 835 | } |
836 | |||
837 | #define __HAVE_ARCH_PMDP_SET_WRPROTECT |
||
838 | static inline void pmdp_set_wrprotect(struct mm_struct *mm, |
||
839 | unsigned long addr, pmd_t *pmdp) |
||
840 | { |
||
841 | clear_bit(_PAGE_BIT_RW, (unsigned long *)pmdp); |
||
842 | } |
||
843 | |||
844 | /* |
||
845 | * clone_pgd_range(pgd_t *dst, pgd_t *src, int count); |
||
846 | * |
||
847 | * dst - pointer to pgd range anwhere on a pgd page |
||
848 | * src - "" |
||
849 | * count - the number of pgds to copy. |
||
850 | * |
||
851 | * dst and src can be on the same page, but the range must not overlap, |
||
852 | * and must not cross a page boundary. |
||
853 | */ |
||
854 | static inline void clone_pgd_range(pgd_t *dst, pgd_t *src, int count) |
||
855 | { |
||
856 | memcpy(dst, src, count * sizeof(pgd_t)); |
||
857 | } |
||
858 | |||
859 | #define PTE_SHIFT ilog2(PTRS_PER_PTE) |
||
860 | static inline int page_level_shift(enum pg_level level) |
||
861 | { |
||
862 | return (PAGE_SHIFT - PTE_SHIFT) + level * PTE_SHIFT; |
||
863 | } |
||
864 | static inline unsigned long page_level_size(enum pg_level level) |
||
865 | { |
||
866 | return 1UL << page_level_shift(level); |
||
867 | } |
||
868 | static inline unsigned long page_level_mask(enum pg_level level) |
||
869 | { |
||
870 | return ~(page_level_size(level) - 1); |
||
871 | } |
||
872 | |||
873 | /* |
||
874 | * The x86 doesn't have any external MMU info: the kernel page |
||
875 | * tables contain all the necessary information. |
||
876 | */ |
||
877 | static inline void update_mmu_cache(struct vm_area_struct *vma, |
||
878 | unsigned long addr, pte_t *ptep) |
||
879 | { |
||
880 | } |
||
881 | static inline void update_mmu_cache_pmd(struct vm_area_struct *vma, |
||
882 | unsigned long addr, pmd_t *pmd) |
||
883 | { |
||
884 | } |
||
885 | |||
886 | #ifdef CONFIG_HAVE_ARCH_SOFT_DIRTY |
||
887 | static inline pte_t pte_swp_mksoft_dirty(pte_t pte) |
||
888 | { |
||
889 | return pte_set_flags(pte, _PAGE_SWP_SOFT_DIRTY); |
||
890 | } |
||
891 | |||
892 | static inline int pte_swp_soft_dirty(pte_t pte) |
||
893 | { |
||
894 | return pte_flags(pte) & _PAGE_SWP_SOFT_DIRTY; |
||
895 | } |
||
896 | |||
897 | static inline pte_t pte_swp_clear_soft_dirty(pte_t pte) |
||
898 | { |
||
899 | return pte_clear_flags(pte, _PAGE_SWP_SOFT_DIRTY); |
||
900 | } |
||
901 | #endif |
||
902 | |||
903 | //#include |
||
904 | #endif /* __ASSEMBLY__ */ |
||
905 | |||
906 | #endif /* _ASM_X86_PGTABLE_H */><>><>><> |