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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 | |
55a6ca25 PA |
19 | #include <asm/x86_init.h> |
20 | ||
8405b122 JF |
21 | /* |
22 | * ZERO_PAGE is a global shared page that is always zero: used | |
23 | * for zero-mapped memory areas etc.. | |
24 | */ | |
3cbaeafe | 25 | extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)]; |
8405b122 JF |
26 | #define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page)) |
27 | ||
e3ed910d JF |
28 | extern spinlock_t pgd_lock; |
29 | extern struct list_head pgd_list; | |
8405b122 | 30 | |
617d34d9 JF |
31 | extern struct mm_struct *pgd_page_get_mm(struct page *page); |
32 | ||
54321d94 JF |
33 | #ifdef CONFIG_PARAVIRT |
34 | #include <asm/paravirt.h> | |
35 | #else /* !CONFIG_PARAVIRT */ | |
36 | #define set_pte(ptep, pte) native_set_pte(ptep, pte) | |
37 | #define set_pte_at(mm, addr, ptep, pte) native_set_pte_at(mm, addr, ptep, pte) | |
2609ae6d | 38 | #define set_pmd_at(mm, addr, pmdp, pmd) native_set_pmd_at(mm, addr, pmdp, pmd) |
54321d94 | 39 | |
54321d94 JF |
40 | #define set_pte_atomic(ptep, pte) \ |
41 | native_set_pte_atomic(ptep, pte) | |
42 | ||
43 | #define set_pmd(pmdp, pmd) native_set_pmd(pmdp, pmd) | |
44 | ||
45 | #ifndef __PAGETABLE_PUD_FOLDED | |
46 | #define set_pgd(pgdp, pgd) native_set_pgd(pgdp, pgd) | |
47 | #define pgd_clear(pgd) native_pgd_clear(pgd) | |
48 | #endif | |
49 | ||
50 | #ifndef set_pud | |
51 | # define set_pud(pudp, pud) native_set_pud(pudp, pud) | |
52 | #endif | |
53 | ||
54 | #ifndef __PAGETABLE_PMD_FOLDED | |
55 | #define pud_clear(pud) native_pud_clear(pud) | |
56 | #endif | |
57 | ||
58 | #define pte_clear(mm, addr, ptep) native_pte_clear(mm, addr, ptep) | |
59 | #define pmd_clear(pmd) native_pmd_clear(pmd) | |
60 | ||
61 | #define pte_update(mm, addr, ptep) do { } while (0) | |
62 | #define pte_update_defer(mm, addr, ptep) do { } while (0) | |
2609ae6d AA |
63 | #define pmd_update(mm, addr, ptep) do { } while (0) |
64 | #define pmd_update_defer(mm, addr, ptep) do { } while (0) | |
54321d94 | 65 | |
54321d94 JF |
66 | #define pgd_val(x) native_pgd_val(x) |
67 | #define __pgd(x) native_make_pgd(x) | |
68 | ||
69 | #ifndef __PAGETABLE_PUD_FOLDED | |
70 | #define pud_val(x) native_pud_val(x) | |
71 | #define __pud(x) native_make_pud(x) | |
72 | #endif | |
73 | ||
74 | #ifndef __PAGETABLE_PMD_FOLDED | |
75 | #define pmd_val(x) native_pmd_val(x) | |
76 | #define __pmd(x) native_make_pmd(x) | |
77 | #endif | |
78 | ||
79 | #define pte_val(x) native_pte_val(x) | |
80 | #define __pte(x) native_make_pte(x) | |
81 | ||
224101ed JF |
82 | #define arch_end_context_switch(prev) do {} while(0) |
83 | ||
54321d94 JF |
84 | #endif /* CONFIG_PARAVIRT */ |
85 | ||
4614139c JF |
86 | /* |
87 | * The following only work if pte_present() is true. | |
88 | * Undefined behaviour if not.. | |
89 | */ | |
3cbaeafe JP |
90 | static inline int pte_dirty(pte_t pte) |
91 | { | |
a15af1c9 | 92 | return pte_flags(pte) & _PAGE_DIRTY; |
3cbaeafe JP |
93 | } |
94 | ||
95 | static inline int pte_young(pte_t pte) | |
96 | { | |
a15af1c9 | 97 | return pte_flags(pte) & _PAGE_ACCESSED; |
3cbaeafe JP |
98 | } |
99 | ||
f2d6bfe9 JW |
100 | static inline int pmd_young(pmd_t pmd) |
101 | { | |
102 | return pmd_flags(pmd) & _PAGE_ACCESSED; | |
103 | } | |
104 | ||
3cbaeafe JP |
105 | static inline int pte_write(pte_t pte) |
106 | { | |
a15af1c9 | 107 | return pte_flags(pte) & _PAGE_RW; |
3cbaeafe JP |
108 | } |
109 | ||
110 | static inline int pte_file(pte_t pte) | |
111 | { | |
a15af1c9 | 112 | return pte_flags(pte) & _PAGE_FILE; |
3cbaeafe JP |
113 | } |
114 | ||
115 | static inline int pte_huge(pte_t pte) | |
116 | { | |
a15af1c9 | 117 | return pte_flags(pte) & _PAGE_PSE; |
4614139c JF |
118 | } |
119 | ||
3cbaeafe JP |
120 | static inline int pte_global(pte_t pte) |
121 | { | |
a15af1c9 | 122 | return pte_flags(pte) & _PAGE_GLOBAL; |
3cbaeafe JP |
123 | } |
124 | ||
125 | static inline int pte_exec(pte_t pte) | |
126 | { | |
a15af1c9 | 127 | return !(pte_flags(pte) & _PAGE_NX); |
3cbaeafe JP |
128 | } |
129 | ||
7e675137 NP |
130 | static inline int pte_special(pte_t pte) |
131 | { | |
606ee44d | 132 | return pte_flags(pte) & _PAGE_SPECIAL; |
7e675137 NP |
133 | } |
134 | ||
91030ca1 HD |
135 | static inline unsigned long pte_pfn(pte_t pte) |
136 | { | |
137 | return (pte_val(pte) & PTE_PFN_MASK) >> PAGE_SHIFT; | |
138 | } | |
139 | ||
087975b0 AM |
140 | static inline unsigned long pmd_pfn(pmd_t pmd) |
141 | { | |
142 | return (pmd_val(pmd) & PTE_PFN_MASK) >> PAGE_SHIFT; | |
143 | } | |
144 | ||
91030ca1 HD |
145 | #define pte_page(pte) pfn_to_page(pte_pfn(pte)) |
146 | ||
3cbaeafe JP |
147 | static inline int pmd_large(pmd_t pte) |
148 | { | |
027ef6c8 | 149 | return pmd_flags(pte) & _PAGE_PSE; |
3cbaeafe JP |
150 | } |
151 | ||
f2d6bfe9 JW |
152 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
153 | static inline int pmd_trans_splitting(pmd_t pmd) | |
154 | { | |
155 | return pmd_val(pmd) & _PAGE_SPLITTING; | |
156 | } | |
157 | ||
158 | static inline int pmd_trans_huge(pmd_t pmd) | |
159 | { | |
160 | return pmd_val(pmd) & _PAGE_PSE; | |
161 | } | |
4b7167b9 AA |
162 | |
163 | static inline int has_transparent_hugepage(void) | |
164 | { | |
165 | return cpu_has_pse; | |
166 | } | |
f2d6bfe9 JW |
167 | #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ |
168 | ||
6522869c JF |
169 | static inline pte_t pte_set_flags(pte_t pte, pteval_t set) |
170 | { | |
171 | pteval_t v = native_pte_val(pte); | |
172 | ||
173 | return native_make_pte(v | set); | |
174 | } | |
175 | ||
176 | static inline pte_t pte_clear_flags(pte_t pte, pteval_t clear) | |
177 | { | |
178 | pteval_t v = native_pte_val(pte); | |
179 | ||
180 | return native_make_pte(v & ~clear); | |
181 | } | |
182 | ||
3cbaeafe JP |
183 | static inline pte_t pte_mkclean(pte_t pte) |
184 | { | |
6522869c | 185 | return pte_clear_flags(pte, _PAGE_DIRTY); |
3cbaeafe JP |
186 | } |
187 | ||
188 | static inline pte_t pte_mkold(pte_t pte) | |
189 | { | |
6522869c | 190 | return pte_clear_flags(pte, _PAGE_ACCESSED); |
3cbaeafe JP |
191 | } |
192 | ||
193 | static inline pte_t pte_wrprotect(pte_t pte) | |
194 | { | |
6522869c | 195 | return pte_clear_flags(pte, _PAGE_RW); |
3cbaeafe JP |
196 | } |
197 | ||
198 | static inline pte_t pte_mkexec(pte_t pte) | |
199 | { | |
6522869c | 200 | return pte_clear_flags(pte, _PAGE_NX); |
3cbaeafe JP |
201 | } |
202 | ||
203 | static inline pte_t pte_mkdirty(pte_t pte) | |
204 | { | |
6522869c | 205 | return pte_set_flags(pte, _PAGE_DIRTY); |
3cbaeafe JP |
206 | } |
207 | ||
208 | static inline pte_t pte_mkyoung(pte_t pte) | |
209 | { | |
6522869c | 210 | return pte_set_flags(pte, _PAGE_ACCESSED); |
3cbaeafe JP |
211 | } |
212 | ||
213 | static inline pte_t pte_mkwrite(pte_t pte) | |
214 | { | |
6522869c | 215 | return pte_set_flags(pte, _PAGE_RW); |
3cbaeafe JP |
216 | } |
217 | ||
218 | static inline pte_t pte_mkhuge(pte_t pte) | |
219 | { | |
6522869c | 220 | return pte_set_flags(pte, _PAGE_PSE); |
3cbaeafe JP |
221 | } |
222 | ||
223 | static inline pte_t pte_clrhuge(pte_t pte) | |
224 | { | |
6522869c | 225 | return pte_clear_flags(pte, _PAGE_PSE); |
3cbaeafe JP |
226 | } |
227 | ||
228 | static inline pte_t pte_mkglobal(pte_t pte) | |
229 | { | |
6522869c | 230 | return pte_set_flags(pte, _PAGE_GLOBAL); |
3cbaeafe JP |
231 | } |
232 | ||
233 | static inline pte_t pte_clrglobal(pte_t pte) | |
234 | { | |
6522869c | 235 | return pte_clear_flags(pte, _PAGE_GLOBAL); |
3cbaeafe | 236 | } |
4614139c | 237 | |
7e675137 NP |
238 | static inline pte_t pte_mkspecial(pte_t pte) |
239 | { | |
6522869c | 240 | return pte_set_flags(pte, _PAGE_SPECIAL); |
7e675137 NP |
241 | } |
242 | ||
f2d6bfe9 JW |
243 | static inline pmd_t pmd_set_flags(pmd_t pmd, pmdval_t set) |
244 | { | |
245 | pmdval_t v = native_pmd_val(pmd); | |
246 | ||
247 | return __pmd(v | set); | |
248 | } | |
249 | ||
250 | static inline pmd_t pmd_clear_flags(pmd_t pmd, pmdval_t clear) | |
251 | { | |
252 | pmdval_t v = native_pmd_val(pmd); | |
253 | ||
254 | return __pmd(v & ~clear); | |
255 | } | |
256 | ||
257 | static inline pmd_t pmd_mkold(pmd_t pmd) | |
258 | { | |
259 | return pmd_clear_flags(pmd, _PAGE_ACCESSED); | |
260 | } | |
261 | ||
262 | static inline pmd_t pmd_wrprotect(pmd_t pmd) | |
263 | { | |
264 | return pmd_clear_flags(pmd, _PAGE_RW); | |
265 | } | |
266 | ||
267 | static inline pmd_t pmd_mkdirty(pmd_t pmd) | |
268 | { | |
269 | return pmd_set_flags(pmd, _PAGE_DIRTY); | |
270 | } | |
271 | ||
272 | static inline pmd_t pmd_mkhuge(pmd_t pmd) | |
273 | { | |
274 | return pmd_set_flags(pmd, _PAGE_PSE); | |
275 | } | |
276 | ||
277 | static inline pmd_t pmd_mkyoung(pmd_t pmd) | |
278 | { | |
279 | return pmd_set_flags(pmd, _PAGE_ACCESSED); | |
280 | } | |
281 | ||
282 | static inline pmd_t pmd_mkwrite(pmd_t pmd) | |
283 | { | |
284 | return pmd_set_flags(pmd, _PAGE_RW); | |
285 | } | |
286 | ||
287 | static inline pmd_t pmd_mknotpresent(pmd_t pmd) | |
288 | { | |
289 | return pmd_clear_flags(pmd, _PAGE_PRESENT); | |
290 | } | |
291 | ||
b534816b JF |
292 | /* |
293 | * Mask out unsupported bits in a present pgprot. Non-present pgprots | |
294 | * can use those bits for other purposes, so leave them be. | |
295 | */ | |
296 | static inline pgprotval_t massage_pgprot(pgprot_t pgprot) | |
297 | { | |
298 | pgprotval_t protval = pgprot_val(pgprot); | |
299 | ||
300 | if (protval & _PAGE_PRESENT) | |
301 | protval &= __supported_pte_mask; | |
302 | ||
303 | return protval; | |
304 | } | |
305 | ||
6fdc05d4 JF |
306 | static inline pte_t pfn_pte(unsigned long page_nr, pgprot_t pgprot) |
307 | { | |
b534816b JF |
308 | return __pte(((phys_addr_t)page_nr << PAGE_SHIFT) | |
309 | massage_pgprot(pgprot)); | |
6fdc05d4 JF |
310 | } |
311 | ||
312 | static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot) | |
313 | { | |
b534816b JF |
314 | return __pmd(((phys_addr_t)page_nr << PAGE_SHIFT) | |
315 | massage_pgprot(pgprot)); | |
6fdc05d4 JF |
316 | } |
317 | ||
38472311 IM |
318 | static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) |
319 | { | |
320 | pteval_t val = pte_val(pte); | |
321 | ||
322 | /* | |
323 | * Chop off the NX bit (if present), and add the NX portion of | |
324 | * the newprot (if present): | |
325 | */ | |
1c12c4cf | 326 | val &= _PAGE_CHG_MASK; |
b534816b | 327 | val |= massage_pgprot(newprot) & ~_PAGE_CHG_MASK; |
38472311 IM |
328 | |
329 | return __pte(val); | |
330 | } | |
331 | ||
c489f125 JW |
332 | static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot) |
333 | { | |
334 | pmdval_t val = pmd_val(pmd); | |
335 | ||
336 | val &= _HPAGE_CHG_MASK; | |
337 | val |= massage_pgprot(newprot) & ~_HPAGE_CHG_MASK; | |
338 | ||
339 | return __pmd(val); | |
340 | } | |
341 | ||
1c12c4cf VP |
342 | /* mprotect needs to preserve PAT bits when updating vm_page_prot */ |
343 | #define pgprot_modify pgprot_modify | |
344 | static inline pgprot_t pgprot_modify(pgprot_t oldprot, pgprot_t newprot) | |
345 | { | |
346 | pgprotval_t preservebits = pgprot_val(oldprot) & _PAGE_CHG_MASK; | |
347 | pgprotval_t addbits = pgprot_val(newprot); | |
348 | return __pgprot(preservebits | addbits); | |
349 | } | |
350 | ||
77be1fab | 351 | #define pte_pgprot(x) __pgprot(pte_flags(x) & PTE_FLAGS_MASK) |
c6ca18eb | 352 | |
b534816b | 353 | #define canon_pgprot(p) __pgprot(massage_pgprot(p)) |
1e8e23bc | 354 | |
1adcaafe SS |
355 | static inline int is_new_memtype_allowed(u64 paddr, unsigned long size, |
356 | unsigned long flags, | |
357 | unsigned long new_flags) | |
afc7d20c | 358 | { |
1adcaafe | 359 | /* |
55a6ca25 | 360 | * PAT type is always WB for untracked ranges, so no need to check. |
1adcaafe | 361 | */ |
8a271389 | 362 | if (x86_platform.is_untracked_pat_range(paddr, paddr + size)) |
1adcaafe SS |
363 | return 1; |
364 | ||
afc7d20c | 365 | /* |
366 | * Certain new memtypes are not allowed with certain | |
367 | * requested memtype: | |
368 | * - request is uncached, return cannot be write-back | |
369 | * - request is write-combine, return cannot be write-back | |
370 | */ | |
371 | if ((flags == _PAGE_CACHE_UC_MINUS && | |
372 | new_flags == _PAGE_CACHE_WB) || | |
373 | (flags == _PAGE_CACHE_WC && | |
374 | new_flags == _PAGE_CACHE_WB)) { | |
375 | return 0; | |
376 | } | |
377 | ||
378 | return 1; | |
379 | } | |
380 | ||
458a3e64 TH |
381 | pmd_t *populate_extra_pmd(unsigned long vaddr); |
382 | pte_t *populate_extra_pte(unsigned long vaddr); | |
4614139c JF |
383 | #endif /* __ASSEMBLY__ */ |
384 | ||
96a388de | 385 | #ifdef CONFIG_X86_32 |
a1ce3928 | 386 | # include <asm/pgtable_32.h> |
96a388de | 387 | #else |
a1ce3928 | 388 | # include <asm/pgtable_64.h> |
96a388de | 389 | #endif |
6c386655 | 390 | |
aca159db | 391 | #ifndef __ASSEMBLY__ |
f476961c | 392 | #include <linux/mm_types.h> |
aca159db | 393 | |
a034a010 JF |
394 | static inline int pte_none(pte_t pte) |
395 | { | |
396 | return !pte.pte; | |
397 | } | |
398 | ||
8de01da3 JF |
399 | #define __HAVE_ARCH_PTE_SAME |
400 | static inline int pte_same(pte_t a, pte_t b) | |
401 | { | |
402 | return a.pte == b.pte; | |
403 | } | |
404 | ||
7c683851 JF |
405 | static inline int pte_present(pte_t a) |
406 | { | |
407 | return pte_flags(a) & (_PAGE_PRESENT | _PAGE_PROTNONE); | |
408 | } | |
409 | ||
eb63657e | 410 | static inline int pte_hidden(pte_t pte) |
dfec072e | 411 | { |
eb63657e | 412 | return pte_flags(pte) & _PAGE_HIDDEN; |
dfec072e VN |
413 | } |
414 | ||
649e8ef6 JF |
415 | static inline int pmd_present(pmd_t pmd) |
416 | { | |
027ef6c8 AA |
417 | /* |
418 | * Checking for _PAGE_PSE is needed too because | |
419 | * split_huge_page will temporarily clear the present bit (but | |
420 | * the _PAGE_PSE flag will remain set at all times while the | |
421 | * _PAGE_PRESENT bit is clear). | |
422 | */ | |
423 | return pmd_flags(pmd) & (_PAGE_PRESENT | _PAGE_PROTNONE | _PAGE_PSE); | |
649e8ef6 JF |
424 | } |
425 | ||
4fea801a JF |
426 | static inline int pmd_none(pmd_t pmd) |
427 | { | |
428 | /* Only check low word on 32-bit platforms, since it might be | |
429 | out of sync with upper half. */ | |
26c8e317 | 430 | return (unsigned long)native_pmd_val(pmd) == 0; |
4fea801a JF |
431 | } |
432 | ||
3ffb3564 JF |
433 | static inline unsigned long pmd_page_vaddr(pmd_t pmd) |
434 | { | |
435 | return (unsigned long)__va(pmd_val(pmd) & PTE_PFN_MASK); | |
436 | } | |
437 | ||
e5f7f202 IM |
438 | /* |
439 | * Currently stuck as a macro due to indirect forward reference to | |
440 | * linux/mmzone.h's __section_mem_map_addr() definition: | |
441 | */ | |
db3eb96f | 442 | #define pmd_page(pmd) pfn_to_page((pmd_val(pmd) & PTE_PFN_MASK) >> PAGE_SHIFT) |
20063ca4 | 443 | |
e24d7eee JF |
444 | /* |
445 | * the pmd page can be thought of an array like this: pmd_t[PTRS_PER_PMD] | |
446 | * | |
447 | * this macro returns the index of the entry in the pmd page which would | |
448 | * control the given virtual address | |
449 | */ | |
ce0c0f9e | 450 | static inline unsigned long pmd_index(unsigned long address) |
e24d7eee JF |
451 | { |
452 | return (address >> PMD_SHIFT) & (PTRS_PER_PMD - 1); | |
453 | } | |
454 | ||
97e2817d JF |
455 | /* |
456 | * Conversion functions: convert a page and protection to a page entry, | |
457 | * and a page entry and page directory to the page they refer to. | |
458 | * | |
459 | * (Currently stuck as a macro because of indirect forward reference | |
460 | * to linux/mm.h:page_to_nid()) | |
461 | */ | |
462 | #define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot)) | |
463 | ||
346309cf JF |
464 | /* |
465 | * the pte page can be thought of an array like this: pte_t[PTRS_PER_PTE] | |
466 | * | |
467 | * this function returns the index of the entry in the pte page which would | |
468 | * control the given virtual address | |
469 | */ | |
ce0c0f9e | 470 | static inline unsigned long pte_index(unsigned long address) |
346309cf JF |
471 | { |
472 | return (address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1); | |
473 | } | |
474 | ||
3fbc2444 JF |
475 | static inline pte_t *pte_offset_kernel(pmd_t *pmd, unsigned long address) |
476 | { | |
477 | return (pte_t *)pmd_page_vaddr(*pmd) + pte_index(address); | |
478 | } | |
479 | ||
99510238 JF |
480 | static inline int pmd_bad(pmd_t pmd) |
481 | { | |
18a7a199 | 482 | return (pmd_flags(pmd) & ~_PAGE_USER) != _KERNPG_TABLE; |
99510238 JF |
483 | } |
484 | ||
cc290ca3 JF |
485 | static inline unsigned long pages_to_mb(unsigned long npg) |
486 | { | |
487 | return npg >> (20 - PAGE_SHIFT); | |
488 | } | |
489 | ||
6cf71500 JF |
490 | #define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \ |
491 | remap_pfn_range(vma, vaddr, pfn, size, prot) | |
492 | ||
5ba7c913 | 493 | #if PAGETABLE_LEVELS > 2 |
deb79cfb JF |
494 | static inline int pud_none(pud_t pud) |
495 | { | |
26c8e317 | 496 | return native_pud_val(pud) == 0; |
deb79cfb JF |
497 | } |
498 | ||
5ba7c913 JF |
499 | static inline int pud_present(pud_t pud) |
500 | { | |
18a7a199 | 501 | return pud_flags(pud) & _PAGE_PRESENT; |
5ba7c913 | 502 | } |
6fff47e3 JF |
503 | |
504 | static inline unsigned long pud_page_vaddr(pud_t pud) | |
505 | { | |
506 | return (unsigned long)__va((unsigned long)pud_val(pud) & PTE_PFN_MASK); | |
507 | } | |
f476961c | 508 | |
e5f7f202 IM |
509 | /* |
510 | * Currently stuck as a macro due to indirect forward reference to | |
511 | * linux/mmzone.h's __section_mem_map_addr() definition: | |
512 | */ | |
513 | #define pud_page(pud) pfn_to_page(pud_val(pud) >> PAGE_SHIFT) | |
01ade20d JF |
514 | |
515 | /* Find an entry in the second-level page table.. */ | |
516 | static inline pmd_t *pmd_offset(pud_t *pud, unsigned long address) | |
517 | { | |
518 | return (pmd_t *)pud_page_vaddr(*pud) + pmd_index(address); | |
519 | } | |
3180fba0 | 520 | |
3f6cbef1 JF |
521 | static inline int pud_large(pud_t pud) |
522 | { | |
e2f5bda9 | 523 | return (pud_val(pud) & (_PAGE_PSE | _PAGE_PRESENT)) == |
3f6cbef1 JF |
524 | (_PAGE_PSE | _PAGE_PRESENT); |
525 | } | |
a61bb29a JF |
526 | |
527 | static inline int pud_bad(pud_t pud) | |
528 | { | |
18a7a199 | 529 | return (pud_flags(pud) & ~(_KERNPG_TABLE | _PAGE_USER)) != 0; |
a61bb29a | 530 | } |
e2f5bda9 JF |
531 | #else |
532 | static inline int pud_large(pud_t pud) | |
533 | { | |
534 | return 0; | |
535 | } | |
5ba7c913 JF |
536 | #endif /* PAGETABLE_LEVELS > 2 */ |
537 | ||
9f38d7e8 JF |
538 | #if PAGETABLE_LEVELS > 3 |
539 | static inline int pgd_present(pgd_t pgd) | |
540 | { | |
18a7a199 | 541 | return pgd_flags(pgd) & _PAGE_PRESENT; |
9f38d7e8 | 542 | } |
c5f040b1 JF |
543 | |
544 | static inline unsigned long pgd_page_vaddr(pgd_t pgd) | |
545 | { | |
546 | return (unsigned long)__va((unsigned long)pgd_val(pgd) & PTE_PFN_MASK); | |
547 | } | |
777cba16 | 548 | |
e5f7f202 IM |
549 | /* |
550 | * Currently stuck as a macro due to indirect forward reference to | |
551 | * linux/mmzone.h's __section_mem_map_addr() definition: | |
552 | */ | |
553 | #define pgd_page(pgd) pfn_to_page(pgd_val(pgd) >> PAGE_SHIFT) | |
7cfb8102 JF |
554 | |
555 | /* to find an entry in a page-table-directory. */ | |
ce0c0f9e | 556 | static inline unsigned long pud_index(unsigned long address) |
7cfb8102 JF |
557 | { |
558 | return (address >> PUD_SHIFT) & (PTRS_PER_PUD - 1); | |
559 | } | |
3d081b18 JF |
560 | |
561 | static inline pud_t *pud_offset(pgd_t *pgd, unsigned long address) | |
562 | { | |
563 | return (pud_t *)pgd_page_vaddr(*pgd) + pud_index(address); | |
564 | } | |
30f10316 JF |
565 | |
566 | static inline int pgd_bad(pgd_t pgd) | |
567 | { | |
18a7a199 | 568 | return (pgd_flags(pgd) & ~_PAGE_USER) != _KERNPG_TABLE; |
30f10316 | 569 | } |
7325cc2e JF |
570 | |
571 | static inline int pgd_none(pgd_t pgd) | |
572 | { | |
26c8e317 | 573 | return !native_pgd_val(pgd); |
7325cc2e | 574 | } |
9f38d7e8 JF |
575 | #endif /* PAGETABLE_LEVELS > 3 */ |
576 | ||
4614139c JF |
577 | #endif /* __ASSEMBLY__ */ |
578 | ||
fb15a9b3 JF |
579 | /* |
580 | * the pgd page can be thought of an array like this: pgd_t[PTRS_PER_PGD] | |
581 | * | |
582 | * this macro returns the index of the entry in the pgd page which would | |
583 | * control the given virtual address | |
584 | */ | |
585 | #define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1)) | |
586 | ||
587 | /* | |
588 | * pgd_offset() returns a (pgd_t *) | |
589 | * pgd_index() is used get the offset into the pgd page's array of pgd_t's; | |
590 | */ | |
591 | #define pgd_offset(mm, address) ((mm)->pgd + pgd_index((address))) | |
592 | /* | |
593 | * a shortcut which implies the use of the kernel's pgd, instead | |
594 | * of a process's | |
595 | */ | |
596 | #define pgd_offset_k(address) pgd_offset(&init_mm, (address)) | |
597 | ||
598 | ||
68db065c JF |
599 | #define KERNEL_PGD_BOUNDARY pgd_index(PAGE_OFFSET) |
600 | #define KERNEL_PGD_PTRS (PTRS_PER_PGD - KERNEL_PGD_BOUNDARY) | |
601 | ||
195466dc JF |
602 | #ifndef __ASSEMBLY__ |
603 | ||
2c1b284e | 604 | extern int direct_gbpages; |
22ddfcaa | 605 | void init_mem_mapping(void); |
2c1b284e | 606 | |
4891645e JF |
607 | /* local pte updates need not use xchg for locking */ |
608 | static inline pte_t native_local_ptep_get_and_clear(pte_t *ptep) | |
609 | { | |
610 | pte_t res = *ptep; | |
611 | ||
612 | /* Pure native function needs no input for mm, addr */ | |
613 | native_pte_clear(NULL, 0, ptep); | |
614 | return res; | |
615 | } | |
616 | ||
f2d6bfe9 JW |
617 | static inline pmd_t native_local_pmdp_get_and_clear(pmd_t *pmdp) |
618 | { | |
619 | pmd_t res = *pmdp; | |
620 | ||
621 | native_pmd_clear(pmdp); | |
622 | return res; | |
623 | } | |
624 | ||
4891645e JF |
625 | static inline void native_set_pte_at(struct mm_struct *mm, unsigned long addr, |
626 | pte_t *ptep , pte_t pte) | |
627 | { | |
628 | native_set_pte(ptep, pte); | |
629 | } | |
630 | ||
0a47de52 AA |
631 | static inline void native_set_pmd_at(struct mm_struct *mm, unsigned long addr, |
632 | pmd_t *pmdp , pmd_t pmd) | |
633 | { | |
634 | native_set_pmd(pmdp, pmd); | |
635 | } | |
636 | ||
195466dc JF |
637 | #ifndef CONFIG_PARAVIRT |
638 | /* | |
639 | * Rules for using pte_update - it must be called after any PTE update which | |
640 | * has not been done using the set_pte / clear_pte interfaces. It is used by | |
641 | * shadow mode hypervisors to resynchronize the shadow page tables. Kernel PTE | |
642 | * updates should either be sets, clears, or set_pte_atomic for P->P | |
643 | * transitions, which means this hook should only be called for user PTEs. | |
644 | * This hook implies a P->P protection or access change has taken place, which | |
645 | * requires a subsequent TLB flush. The notification can optionally be delayed | |
646 | * until the TLB flush event by using the pte_update_defer form of the | |
647 | * interface, but care must be taken to assure that the flush happens while | |
648 | * still holding the same page table lock so that the shadow and primary pages | |
649 | * do not become out of sync on SMP. | |
650 | */ | |
651 | #define pte_update(mm, addr, ptep) do { } while (0) | |
652 | #define pte_update_defer(mm, addr, ptep) do { } while (0) | |
653 | #endif | |
654 | ||
195466dc JF |
655 | /* |
656 | * We only update the dirty/accessed state if we set | |
657 | * the dirty bit by hand in the kernel, since the hardware | |
658 | * will do the accessed bit for us, and we don't want to | |
659 | * race with other CPU's that might be updating the dirty | |
660 | * bit at the same time. | |
661 | */ | |
bea41808 JF |
662 | struct vm_area_struct; |
663 | ||
195466dc | 664 | #define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS |
ee5aa8d3 JF |
665 | extern int ptep_set_access_flags(struct vm_area_struct *vma, |
666 | unsigned long address, pte_t *ptep, | |
667 | pte_t entry, int dirty); | |
195466dc JF |
668 | |
669 | #define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG | |
f9fbf1a3 JF |
670 | extern int ptep_test_and_clear_young(struct vm_area_struct *vma, |
671 | unsigned long addr, pte_t *ptep); | |
195466dc JF |
672 | |
673 | #define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH | |
c20311e1 JF |
674 | extern int ptep_clear_flush_young(struct vm_area_struct *vma, |
675 | unsigned long address, pte_t *ptep); | |
195466dc JF |
676 | |
677 | #define __HAVE_ARCH_PTEP_GET_AND_CLEAR | |
3cbaeafe JP |
678 | static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, |
679 | pte_t *ptep) | |
195466dc JF |
680 | { |
681 | pte_t pte = native_ptep_get_and_clear(ptep); | |
682 | pte_update(mm, addr, ptep); | |
683 | return pte; | |
684 | } | |
685 | ||
686 | #define __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL | |
3cbaeafe JP |
687 | static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm, |
688 | unsigned long addr, pte_t *ptep, | |
689 | int full) | |
195466dc JF |
690 | { |
691 | pte_t pte; | |
692 | if (full) { | |
693 | /* | |
694 | * Full address destruction in progress; paravirt does not | |
695 | * care about updates and native needs no locking | |
696 | */ | |
697 | pte = native_local_ptep_get_and_clear(ptep); | |
698 | } else { | |
699 | pte = ptep_get_and_clear(mm, addr, ptep); | |
700 | } | |
701 | return pte; | |
702 | } | |
703 | ||
704 | #define __HAVE_ARCH_PTEP_SET_WRPROTECT | |
3cbaeafe JP |
705 | static inline void ptep_set_wrprotect(struct mm_struct *mm, |
706 | unsigned long addr, pte_t *ptep) | |
195466dc | 707 | { |
d8d89827 | 708 | clear_bit(_PAGE_BIT_RW, (unsigned long *)&ptep->pte); |
195466dc JF |
709 | pte_update(mm, addr, ptep); |
710 | } | |
711 | ||
2ac13462 | 712 | #define flush_tlb_fix_spurious_fault(vma, address) do { } while (0) |
61c77326 | 713 | |
f2d6bfe9 JW |
714 | #define mk_pmd(page, pgprot) pfn_pmd(page_to_pfn(page), (pgprot)) |
715 | ||
716 | #define __HAVE_ARCH_PMDP_SET_ACCESS_FLAGS | |
717 | extern int pmdp_set_access_flags(struct vm_area_struct *vma, | |
718 | unsigned long address, pmd_t *pmdp, | |
719 | pmd_t entry, int dirty); | |
720 | ||
721 | #define __HAVE_ARCH_PMDP_TEST_AND_CLEAR_YOUNG | |
722 | extern int pmdp_test_and_clear_young(struct vm_area_struct *vma, | |
723 | unsigned long addr, pmd_t *pmdp); | |
724 | ||
725 | #define __HAVE_ARCH_PMDP_CLEAR_YOUNG_FLUSH | |
726 | extern int pmdp_clear_flush_young(struct vm_area_struct *vma, | |
727 | unsigned long address, pmd_t *pmdp); | |
728 | ||
729 | ||
730 | #define __HAVE_ARCH_PMDP_SPLITTING_FLUSH | |
731 | extern void pmdp_splitting_flush(struct vm_area_struct *vma, | |
732 | unsigned long addr, pmd_t *pmdp); | |
733 | ||
734 | #define __HAVE_ARCH_PMD_WRITE | |
735 | static inline int pmd_write(pmd_t pmd) | |
736 | { | |
737 | return pmd_flags(pmd) & _PAGE_RW; | |
738 | } | |
739 | ||
740 | #define __HAVE_ARCH_PMDP_GET_AND_CLEAR | |
741 | static inline pmd_t pmdp_get_and_clear(struct mm_struct *mm, unsigned long addr, | |
742 | pmd_t *pmdp) | |
743 | { | |
744 | pmd_t pmd = native_pmdp_get_and_clear(pmdp); | |
745 | pmd_update(mm, addr, pmdp); | |
746 | return pmd; | |
747 | } | |
748 | ||
749 | #define __HAVE_ARCH_PMDP_SET_WRPROTECT | |
750 | static inline void pmdp_set_wrprotect(struct mm_struct *mm, | |
751 | unsigned long addr, pmd_t *pmdp) | |
752 | { | |
753 | clear_bit(_PAGE_BIT_RW, (unsigned long *)pmdp); | |
754 | pmd_update(mm, addr, pmdp); | |
755 | } | |
756 | ||
85958b46 JF |
757 | /* |
758 | * clone_pgd_range(pgd_t *dst, pgd_t *src, int count); | |
759 | * | |
760 | * dst - pointer to pgd range anwhere on a pgd page | |
761 | * src - "" | |
762 | * count - the number of pgds to copy. | |
763 | * | |
764 | * dst and src can be on the same page, but the range must not overlap, | |
765 | * and must not cross a page boundary. | |
766 | */ | |
767 | static inline void clone_pgd_range(pgd_t *dst, pgd_t *src, int count) | |
768 | { | |
769 | memcpy(dst, src, count * sizeof(pgd_t)); | |
770 | } | |
771 | ||
772 | ||
195466dc JF |
773 | #include <asm-generic/pgtable.h> |
774 | #endif /* __ASSEMBLY__ */ | |
775 | ||
1965aae3 | 776 | #endif /* _ASM_X86_PGTABLE_H */ |