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