Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * This file is subject to the terms and conditions of the GNU General Public | |
3 | * License. See the file "COPYING" in the main directory of this archive | |
4 | * for more details. | |
5 | * | |
6 | * Copyright (C) 2003 Ralf Baechle | |
7 | */ | |
8 | #ifndef _ASM_PGTABLE_H | |
9 | #define _ASM_PGTABLE_H | |
10 | ||
5bbea36a | 11 | #include <linux/mm_types.h> |
970d032f | 12 | #include <linux/mmzone.h> |
875d43e7 | 13 | #ifdef CONFIG_32BIT |
1da177e4 LT |
14 | #include <asm/pgtable-32.h> |
15 | #endif | |
875d43e7 | 16 | #ifdef CONFIG_64BIT |
1da177e4 LT |
17 | #include <asm/pgtable-64.h> |
18 | #endif | |
19 | ||
f10fae02 | 20 | #include <asm/io.h> |
1da177e4 LT |
21 | #include <asm/pgtable-bits.h> |
22 | ||
8c65b4a6 TS |
23 | struct mm_struct; |
24 | struct vm_area_struct; | |
25 | ||
1da177e4 | 26 | #define PAGE_NONE __pgprot(_PAGE_PRESENT | _CACHE_CACHABLE_NONCOHERENT) |
05857c64 | 27 | #define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_WRITE | (cpu_has_rixi ? 0 : _PAGE_READ) | \ |
35133692 | 28 | _page_cachable_default) |
05857c64 SH |
29 | #define PAGE_COPY __pgprot(_PAGE_PRESENT | (cpu_has_rixi ? 0 : _PAGE_READ) | \ |
30 | (cpu_has_rixi ? _PAGE_NO_EXEC : 0) | _page_cachable_default) | |
31 | #define PAGE_READONLY __pgprot(_PAGE_PRESENT | (cpu_has_rixi ? 0 : _PAGE_READ) | \ | |
35133692 | 32 | _page_cachable_default) |
1da177e4 | 33 | #define PAGE_KERNEL __pgprot(_PAGE_PRESENT | __READABLE | __WRITEABLE | \ |
35133692 | 34 | _PAGE_GLOBAL | _page_cachable_default) |
e2a9e5ad PB |
35 | #define PAGE_KERNEL_NC __pgprot(_PAGE_PRESENT | __READABLE | __WRITEABLE | \ |
36 | _PAGE_GLOBAL | _CACHE_CACHABLE_NONCOHERENT) | |
05857c64 | 37 | #define PAGE_USERIO __pgprot(_PAGE_PRESENT | (cpu_has_rixi ? 0 : _PAGE_READ) | _PAGE_WRITE | \ |
35133692 | 38 | _page_cachable_default) |
1da177e4 LT |
39 | #define PAGE_KERNEL_UNCACHED __pgprot(_PAGE_PRESENT | __READABLE | \ |
40 | __WRITEABLE | _PAGE_GLOBAL | _CACHE_UNCACHED) | |
41 | ||
42 | /* | |
6dd9344c DD |
43 | * If _PAGE_NO_EXEC is not defined, we can't do page protection for |
44 | * execute, and consider it to be the same as read. Also, write | |
45 | * permissions imply read permissions. This is the closest we can get | |
46 | * by reasonable means.. | |
1da177e4 | 47 | */ |
1da177e4 | 48 | |
35133692 CD |
49 | /* |
50 | * Dummy values to fill the table in mmap.c | |
51 | * The real values will be generated at runtime | |
52 | */ | |
53 | #define __P000 __pgprot(0) | |
54 | #define __P001 __pgprot(0) | |
55 | #define __P010 __pgprot(0) | |
56 | #define __P011 __pgprot(0) | |
57 | #define __P100 __pgprot(0) | |
58 | #define __P101 __pgprot(0) | |
59 | #define __P110 __pgprot(0) | |
60 | #define __P111 __pgprot(0) | |
61 | ||
62 | #define __S000 __pgprot(0) | |
63 | #define __S001 __pgprot(0) | |
64 | #define __S010 __pgprot(0) | |
65 | #define __S011 __pgprot(0) | |
66 | #define __S100 __pgprot(0) | |
67 | #define __S101 __pgprot(0) | |
68 | #define __S110 __pgprot(0) | |
69 | #define __S111 __pgprot(0) | |
70 | ||
71 | extern unsigned long _page_cachable_default; | |
1da177e4 LT |
72 | |
73 | /* | |
74 | * ZERO_PAGE is a global shared page that is always zero; used | |
75 | * for zero-mapped memory areas etc.. | |
76 | */ | |
77 | ||
78 | extern unsigned long empty_zero_page; | |
79 | extern unsigned long zero_page_mask; | |
80 | ||
81 | #define ZERO_PAGE(vaddr) \ | |
99e3b942 | 82 | (virt_to_page((void *)(empty_zero_page + (((unsigned long)(vaddr)) & zero_page_mask)))) |
816422ad | 83 | #define __HAVE_COLOR_ZERO_PAGE |
62eede62 | 84 | |
1da177e4 LT |
85 | extern void paging_init(void); |
86 | ||
87 | /* | |
88 | * Conversion functions: convert a page and protection to a page entry, | |
89 | * and a page entry and page directory to the page they refer to. | |
90 | */ | |
c9d06962 | 91 | #define pmd_phys(pmd) virt_to_phys((void *)pmd_val(pmd)) |
970d032f RB |
92 | |
93 | #define __pmd_page(pmd) (pfn_to_page(pmd_phys(pmd) >> PAGE_SHIFT)) | |
94 | #ifndef CONFIG_TRANSPARENT_HUGEPAGE | |
95 | #define pmd_page(pmd) __pmd_page(pmd) | |
96 | #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ | |
97 | ||
46a82b2d | 98 | #define pmd_page_vaddr(pmd) pmd_val(pmd) |
1da177e4 | 99 | |
962f480e | 100 | #if defined(CONFIG_64BIT_PHYS_ADDR) && defined(CONFIG_CPU_MIPS32) |
6e953891 SS |
101 | |
102 | #define pte_none(pte) (!(((pte).pte_low | (pte).pte_high) & ~_PAGE_GLOBAL)) | |
103 | #define pte_present(pte) ((pte).pte_low & _PAGE_PRESENT) | |
104 | ||
1da177e4 LT |
105 | static inline void set_pte(pte_t *ptep, pte_t pte) |
106 | { | |
107 | ptep->pte_high = pte.pte_high; | |
108 | smp_wmb(); | |
109 | ptep->pte_low = pte.pte_low; | |
1da177e4 | 110 | |
6e953891 | 111 | if (pte.pte_low & _PAGE_GLOBAL) { |
1da177e4 LT |
112 | pte_t *buddy = ptep_buddy(ptep); |
113 | /* | |
114 | * Make sure the buddy is global too (if it's !none, | |
115 | * it better already be global) | |
116 | */ | |
6e953891 | 117 | if (pte_none(*buddy)) { |
70342287 | 118 | buddy->pte_low |= _PAGE_GLOBAL; |
6e953891 SS |
119 | buddy->pte_high |= _PAGE_GLOBAL; |
120 | } | |
1da177e4 LT |
121 | } |
122 | } | |
21a151d8 | 123 | #define set_pte_at(mm, addr, ptep, pteval) set_pte(ptep, pteval) |
1da177e4 LT |
124 | |
125 | static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep) | |
126 | { | |
6e953891 SS |
127 | pte_t null = __pte(0); |
128 | ||
1da177e4 | 129 | /* Preserve global status for the pair */ |
6e953891 SS |
130 | if (ptep_buddy(ptep)->pte_low & _PAGE_GLOBAL) |
131 | null.pte_low = null.pte_high = _PAGE_GLOBAL; | |
132 | ||
133 | set_pte_at(mm, addr, ptep, null); | |
1da177e4 LT |
134 | } |
135 | #else | |
6e953891 SS |
136 | |
137 | #define pte_none(pte) (!(pte_val(pte) & ~_PAGE_GLOBAL)) | |
138 | #define pte_present(pte) (pte_val(pte) & _PAGE_PRESENT) | |
139 | ||
1da177e4 LT |
140 | /* |
141 | * Certain architectures need to do special things when pte's | |
142 | * within a page table are directly modified. Thus, the following | |
143 | * hook is made available. | |
144 | */ | |
145 | static inline void set_pte(pte_t *ptep, pte_t pteval) | |
146 | { | |
147 | *ptep = pteval; | |
148 | #if !defined(CONFIG_CPU_R3000) && !defined(CONFIG_CPU_TX39XX) | |
149 | if (pte_val(pteval) & _PAGE_GLOBAL) { | |
150 | pte_t *buddy = ptep_buddy(ptep); | |
151 | /* | |
152 | * Make sure the buddy is global too (if it's !none, | |
153 | * it better already be global) | |
154 | */ | |
155 | if (pte_none(*buddy)) | |
156 | pte_val(*buddy) = pte_val(*buddy) | _PAGE_GLOBAL; | |
157 | } | |
158 | #endif | |
159 | } | |
21a151d8 | 160 | #define set_pte_at(mm, addr, ptep, pteval) set_pte(ptep, pteval) |
1da177e4 LT |
161 | |
162 | static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep) | |
163 | { | |
164 | #if !defined(CONFIG_CPU_R3000) && !defined(CONFIG_CPU_TX39XX) | |
165 | /* Preserve global status for the pair */ | |
166 | if (pte_val(*ptep_buddy(ptep)) & _PAGE_GLOBAL) | |
167 | set_pte_at(mm, addr, ptep, __pte(_PAGE_GLOBAL)); | |
168 | else | |
169 | #endif | |
170 | set_pte_at(mm, addr, ptep, __pte(0)); | |
171 | } | |
172 | #endif | |
173 | ||
174 | /* | |
c6e8b587 | 175 | * (pmds are folded into puds so this doesn't get actually called, |
1da177e4 LT |
176 | * but the define is needed for a generic inline function.) |
177 | */ | |
178 | #define set_pmd(pmdptr, pmdval) do { *(pmdptr) = (pmdval); } while(0) | |
c6e8b587 | 179 | |
325f8a0a | 180 | #ifndef __PAGETABLE_PMD_FOLDED |
c6e8b587 RB |
181 | /* |
182 | * (puds are folded into pgds so this doesn't get actually called, | |
183 | * but the define is needed for a generic inline function.) | |
184 | */ | |
185 | #define set_pud(pudptr, pudval) do { *(pudptr) = (pudval); } while(0) | |
186 | #endif | |
1da177e4 | 187 | |
5ff97472 RB |
188 | #define PGD_T_LOG2 (__builtin_ffs(sizeof(pgd_t)) - 1) |
189 | #define PMD_T_LOG2 (__builtin_ffs(sizeof(pmd_t)) - 1) | |
190 | #define PTE_T_LOG2 (__builtin_ffs(sizeof(pte_t)) - 1) | |
1da177e4 | 191 | |
9975e77d RB |
192 | /* |
193 | * We used to declare this array with size but gcc 3.3 and older are not able | |
194 | * to find that this expression is a constant, so the size is dropped. | |
195 | */ | |
196 | extern pgd_t swapper_pg_dir[]; | |
1da177e4 LT |
197 | |
198 | /* | |
199 | * The following only work if pte_present() is true. | |
200 | * Undefined behaviour if not.. | |
201 | */ | |
962f480e | 202 | #if defined(CONFIG_64BIT_PHYS_ADDR) && defined(CONFIG_CPU_MIPS32) |
6e953891 SS |
203 | static inline int pte_write(pte_t pte) { return pte.pte_low & _PAGE_WRITE; } |
204 | static inline int pte_dirty(pte_t pte) { return pte.pte_low & _PAGE_MODIFIED; } | |
205 | static inline int pte_young(pte_t pte) { return pte.pte_low & _PAGE_ACCESSED; } | |
206 | static inline int pte_file(pte_t pte) { return pte.pte_low & _PAGE_FILE; } | |
207 | ||
1da177e4 LT |
208 | static inline pte_t pte_wrprotect(pte_t pte) |
209 | { | |
6e953891 SS |
210 | pte.pte_low &= ~(_PAGE_WRITE | _PAGE_SILENT_WRITE); |
211 | pte.pte_high &= ~_PAGE_SILENT_WRITE; | |
1da177e4 LT |
212 | return pte; |
213 | } | |
214 | ||
1da177e4 LT |
215 | static inline pte_t pte_mkclean(pte_t pte) |
216 | { | |
6e953891 SS |
217 | pte.pte_low &= ~(_PAGE_MODIFIED | _PAGE_SILENT_WRITE); |
218 | pte.pte_high &= ~_PAGE_SILENT_WRITE; | |
1da177e4 LT |
219 | return pte; |
220 | } | |
221 | ||
222 | static inline pte_t pte_mkold(pte_t pte) | |
223 | { | |
6e953891 SS |
224 | pte.pte_low &= ~(_PAGE_ACCESSED | _PAGE_SILENT_READ); |
225 | pte.pte_high &= ~_PAGE_SILENT_READ; | |
1da177e4 LT |
226 | return pte; |
227 | } | |
228 | ||
229 | static inline pte_t pte_mkwrite(pte_t pte) | |
230 | { | |
6e953891 SS |
231 | pte.pte_low |= _PAGE_WRITE; |
232 | if (pte.pte_low & _PAGE_MODIFIED) { | |
233 | pte.pte_low |= _PAGE_SILENT_WRITE; | |
234 | pte.pte_high |= _PAGE_SILENT_WRITE; | |
1da177e4 LT |
235 | } |
236 | return pte; | |
237 | } | |
238 | ||
1da177e4 LT |
239 | static inline pte_t pte_mkdirty(pte_t pte) |
240 | { | |
6e953891 SS |
241 | pte.pte_low |= _PAGE_MODIFIED; |
242 | if (pte.pte_low & _PAGE_WRITE) { | |
243 | pte.pte_low |= _PAGE_SILENT_WRITE; | |
244 | pte.pte_high |= _PAGE_SILENT_WRITE; | |
1da177e4 LT |
245 | } |
246 | return pte; | |
247 | } | |
248 | ||
249 | static inline pte_t pte_mkyoung(pte_t pte) | |
250 | { | |
6e953891 | 251 | pte.pte_low |= _PAGE_ACCESSED; |
057229f9 | 252 | if (pte.pte_low & _PAGE_READ) { |
6e953891 SS |
253 | pte.pte_low |= _PAGE_SILENT_READ; |
254 | pte.pte_high |= _PAGE_SILENT_READ; | |
057229f9 | 255 | } |
1da177e4 LT |
256 | return pte; |
257 | } | |
258 | #else | |
1da177e4 LT |
259 | static inline int pte_write(pte_t pte) { return pte_val(pte) & _PAGE_WRITE; } |
260 | static inline int pte_dirty(pte_t pte) { return pte_val(pte) & _PAGE_MODIFIED; } | |
261 | static inline int pte_young(pte_t pte) { return pte_val(pte) & _PAGE_ACCESSED; } | |
262 | static inline int pte_file(pte_t pte) { return pte_val(pte) & _PAGE_FILE; } | |
263 | ||
264 | static inline pte_t pte_wrprotect(pte_t pte) | |
265 | { | |
266 | pte_val(pte) &= ~(_PAGE_WRITE | _PAGE_SILENT_WRITE); | |
267 | return pte; | |
268 | } | |
269 | ||
1da177e4 LT |
270 | static inline pte_t pte_mkclean(pte_t pte) |
271 | { | |
272 | pte_val(pte) &= ~(_PAGE_MODIFIED|_PAGE_SILENT_WRITE); | |
273 | return pte; | |
274 | } | |
275 | ||
276 | static inline pte_t pte_mkold(pte_t pte) | |
277 | { | |
278 | pte_val(pte) &= ~(_PAGE_ACCESSED|_PAGE_SILENT_READ); | |
279 | return pte; | |
280 | } | |
281 | ||
282 | static inline pte_t pte_mkwrite(pte_t pte) | |
283 | { | |
284 | pte_val(pte) |= _PAGE_WRITE; | |
285 | if (pte_val(pte) & _PAGE_MODIFIED) | |
286 | pte_val(pte) |= _PAGE_SILENT_WRITE; | |
287 | return pte; | |
288 | } | |
289 | ||
1da177e4 LT |
290 | static inline pte_t pte_mkdirty(pte_t pte) |
291 | { | |
292 | pte_val(pte) |= _PAGE_MODIFIED; | |
293 | if (pte_val(pte) & _PAGE_WRITE) | |
294 | pte_val(pte) |= _PAGE_SILENT_WRITE; | |
295 | return pte; | |
296 | } | |
297 | ||
298 | static inline pte_t pte_mkyoung(pte_t pte) | |
299 | { | |
300 | pte_val(pte) |= _PAGE_ACCESSED; | |
05857c64 | 301 | if (cpu_has_rixi) { |
6dd9344c DD |
302 | if (!(pte_val(pte) & _PAGE_NO_READ)) |
303 | pte_val(pte) |= _PAGE_SILENT_READ; | |
304 | } else { | |
305 | if (pte_val(pte) & _PAGE_READ) | |
306 | pte_val(pte) |= _PAGE_SILENT_READ; | |
307 | } | |
1da177e4 LT |
308 | return pte; |
309 | } | |
dd794392 DD |
310 | |
311 | #ifdef _PAGE_HUGE | |
312 | static inline int pte_huge(pte_t pte) { return pte_val(pte) & _PAGE_HUGE; } | |
313 | ||
314 | static inline pte_t pte_mkhuge(pte_t pte) | |
315 | { | |
316 | pte_val(pte) |= _PAGE_HUGE; | |
317 | return pte; | |
318 | } | |
319 | #endif /* _PAGE_HUGE */ | |
1da177e4 | 320 | #endif |
7e675137 NP |
321 | static inline int pte_special(pte_t pte) { return 0; } |
322 | static inline pte_t pte_mkspecial(pte_t pte) { return pte; } | |
1da177e4 LT |
323 | |
324 | /* | |
70342287 | 325 | * Macro to make mark a page protection value as "uncacheable". Note |
1da177e4 LT |
326 | * that "protection" is really a misnomer here as the protection value |
327 | * contains the memory attribute bits, dirty bits, and various other | |
328 | * bits as well. | |
329 | */ | |
330 | #define pgprot_noncached pgprot_noncached | |
331 | ||
332 | static inline pgprot_t pgprot_noncached(pgprot_t _prot) | |
333 | { | |
334 | unsigned long prot = pgprot_val(_prot); | |
335 | ||
336 | prot = (prot & ~_CACHE_MASK) | _CACHE_UNCACHED; | |
337 | ||
338 | return __pgprot(prot); | |
339 | } | |
340 | ||
341 | /* | |
342 | * Conversion functions: convert a page and protection to a page entry, | |
343 | * and a page entry and page directory to the page they refer to. | |
344 | */ | |
345 | #define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot)) | |
346 | ||
962f480e | 347 | #if defined(CONFIG_64BIT_PHYS_ADDR) && defined(CONFIG_CPU_MIPS32) |
1da177e4 LT |
348 | static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) |
349 | { | |
79e0bc37 SS |
350 | pte.pte_low &= _PAGE_CHG_MASK; |
351 | pte.pte_high &= ~0x3f; | |
352 | pte.pte_low |= pgprot_val(newprot); | |
1da177e4 LT |
353 | pte.pte_high |= pgprot_val(newprot) & 0x3f; |
354 | return pte; | |
355 | } | |
356 | #else | |
357 | static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) | |
358 | { | |
359 | return __pte((pte_val(pte) & _PAGE_CHG_MASK) | pgprot_val(newprot)); | |
360 | } | |
361 | #endif | |
362 | ||
363 | ||
364 | extern void __update_tlb(struct vm_area_struct *vma, unsigned long address, | |
365 | pte_t pte); | |
366 | extern void __update_cache(struct vm_area_struct *vma, unsigned long address, | |
367 | pte_t pte); | |
368 | ||
369 | static inline void update_mmu_cache(struct vm_area_struct *vma, | |
4b3073e1 | 370 | unsigned long address, pte_t *ptep) |
1da177e4 | 371 | { |
4b3073e1 | 372 | pte_t pte = *ptep; |
1da177e4 LT |
373 | __update_tlb(vma, address, pte); |
374 | __update_cache(vma, address, pte); | |
375 | } | |
376 | ||
970d032f RB |
377 | static inline void update_mmu_cache_pmd(struct vm_area_struct *vma, |
378 | unsigned long address, pmd_t *pmdp) | |
379 | { | |
380 | pte_t pte = *(pte_t *)pmdp; | |
381 | ||
382 | __update_tlb(vma, address, pte); | |
383 | } | |
384 | ||
1da177e4 | 385 | #define kern_addr_valid(addr) (1) |
1da177e4 LT |
386 | |
387 | #ifdef CONFIG_64BIT_PHYS_ADDR | |
1da177e4 LT |
388 | extern int remap_pfn_range(struct vm_area_struct *vma, unsigned long from, unsigned long pfn, unsigned long size, pgprot_t prot); |
389 | ||
1da177e4 LT |
390 | static inline int io_remap_pfn_range(struct vm_area_struct *vma, |
391 | unsigned long vaddr, | |
392 | unsigned long pfn, | |
393 | unsigned long size, | |
394 | pgprot_t prot) | |
395 | { | |
396 | phys_t phys_addr_high = fixup_bigphys_addr(pfn << PAGE_SHIFT, size); | |
ac5d8c02 | 397 | return remap_pfn_range(vma, vaddr, phys_addr_high >> PAGE_SHIFT, size, prot); |
1da177e4 | 398 | } |
40d158e6 | 399 | #define io_remap_pfn_range io_remap_pfn_range |
1da177e4 LT |
400 | #endif |
401 | ||
970d032f RB |
402 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
403 | ||
404 | extern int has_transparent_hugepage(void); | |
405 | ||
406 | static inline int pmd_trans_huge(pmd_t pmd) | |
407 | { | |
408 | return !!(pmd_val(pmd) & _PAGE_HUGE); | |
409 | } | |
410 | ||
411 | static inline pmd_t pmd_mkhuge(pmd_t pmd) | |
412 | { | |
413 | pmd_val(pmd) |= _PAGE_HUGE; | |
414 | ||
415 | return pmd; | |
416 | } | |
417 | ||
418 | static inline int pmd_trans_splitting(pmd_t pmd) | |
419 | { | |
420 | return !!(pmd_val(pmd) & _PAGE_SPLITTING); | |
421 | } | |
422 | ||
423 | static inline pmd_t pmd_mksplitting(pmd_t pmd) | |
424 | { | |
425 | pmd_val(pmd) |= _PAGE_SPLITTING; | |
426 | ||
427 | return pmd; | |
428 | } | |
429 | ||
430 | extern void set_pmd_at(struct mm_struct *mm, unsigned long addr, | |
431 | pmd_t *pmdp, pmd_t pmd); | |
432 | ||
433 | #define __HAVE_ARCH_PMDP_SPLITTING_FLUSH | |
434 | /* Extern to avoid header file madness */ | |
435 | extern void pmdp_splitting_flush(struct vm_area_struct *vma, | |
436 | unsigned long address, | |
437 | pmd_t *pmdp); | |
438 | ||
439 | #define __HAVE_ARCH_PMD_WRITE | |
440 | static inline int pmd_write(pmd_t pmd) | |
441 | { | |
442 | return !!(pmd_val(pmd) & _PAGE_WRITE); | |
443 | } | |
444 | ||
445 | static inline pmd_t pmd_wrprotect(pmd_t pmd) | |
446 | { | |
447 | pmd_val(pmd) &= ~(_PAGE_WRITE | _PAGE_SILENT_WRITE); | |
448 | return pmd; | |
449 | } | |
450 | ||
451 | static inline pmd_t pmd_mkwrite(pmd_t pmd) | |
452 | { | |
453 | pmd_val(pmd) |= _PAGE_WRITE; | |
454 | if (pmd_val(pmd) & _PAGE_MODIFIED) | |
455 | pmd_val(pmd) |= _PAGE_SILENT_WRITE; | |
456 | ||
457 | return pmd; | |
458 | } | |
459 | ||
460 | static inline int pmd_dirty(pmd_t pmd) | |
461 | { | |
462 | return !!(pmd_val(pmd) & _PAGE_MODIFIED); | |
463 | } | |
464 | ||
465 | static inline pmd_t pmd_mkclean(pmd_t pmd) | |
466 | { | |
467 | pmd_val(pmd) &= ~(_PAGE_MODIFIED | _PAGE_SILENT_WRITE); | |
468 | return pmd; | |
469 | } | |
470 | ||
471 | static inline pmd_t pmd_mkdirty(pmd_t pmd) | |
472 | { | |
473 | pmd_val(pmd) |= _PAGE_MODIFIED; | |
474 | if (pmd_val(pmd) & _PAGE_WRITE) | |
475 | pmd_val(pmd) |= _PAGE_SILENT_WRITE; | |
476 | ||
477 | return pmd; | |
478 | } | |
479 | ||
480 | static inline int pmd_young(pmd_t pmd) | |
481 | { | |
482 | return !!(pmd_val(pmd) & _PAGE_ACCESSED); | |
483 | } | |
484 | ||
485 | static inline pmd_t pmd_mkold(pmd_t pmd) | |
486 | { | |
487 | pmd_val(pmd) &= ~(_PAGE_ACCESSED|_PAGE_SILENT_READ); | |
488 | ||
489 | return pmd; | |
490 | } | |
491 | ||
492 | static inline pmd_t pmd_mkyoung(pmd_t pmd) | |
493 | { | |
494 | pmd_val(pmd) |= _PAGE_ACCESSED; | |
495 | ||
496 | if (cpu_has_rixi) { | |
497 | if (!(pmd_val(pmd) & _PAGE_NO_READ)) | |
498 | pmd_val(pmd) |= _PAGE_SILENT_READ; | |
499 | } else { | |
500 | if (pmd_val(pmd) & _PAGE_READ) | |
501 | pmd_val(pmd) |= _PAGE_SILENT_READ; | |
502 | } | |
503 | ||
504 | return pmd; | |
505 | } | |
506 | ||
507 | /* Extern to avoid header file madness */ | |
508 | extern pmd_t mk_pmd(struct page *page, pgprot_t prot); | |
509 | ||
510 | static inline unsigned long pmd_pfn(pmd_t pmd) | |
511 | { | |
512 | return pmd_val(pmd) >> _PFN_SHIFT; | |
513 | } | |
514 | ||
515 | static inline struct page *pmd_page(pmd_t pmd) | |
516 | { | |
517 | if (pmd_trans_huge(pmd)) | |
518 | return pfn_to_page(pmd_pfn(pmd)); | |
519 | ||
520 | return pfn_to_page(pmd_phys(pmd) >> PAGE_SHIFT); | |
521 | } | |
522 | ||
523 | static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot) | |
524 | { | |
525 | pmd_val(pmd) = (pmd_val(pmd) & _PAGE_CHG_MASK) | pgprot_val(newprot); | |
526 | return pmd; | |
527 | } | |
528 | ||
529 | static inline pmd_t pmd_mknotpresent(pmd_t pmd) | |
530 | { | |
531 | pmd_val(pmd) &= ~(_PAGE_PRESENT | _PAGE_VALID | _PAGE_DIRTY); | |
532 | ||
533 | return pmd; | |
534 | } | |
535 | ||
536 | /* | |
537 | * The generic version pmdp_get_and_clear uses a version of pmd_clear() with a | |
538 | * different prototype. | |
539 | */ | |
540 | #define __HAVE_ARCH_PMDP_GET_AND_CLEAR | |
541 | static inline pmd_t pmdp_get_and_clear(struct mm_struct *mm, | |
542 | unsigned long address, pmd_t *pmdp) | |
543 | { | |
544 | pmd_t old = *pmdp; | |
545 | ||
546 | pmd_clear(pmdp); | |
547 | ||
548 | return old; | |
549 | } | |
550 | ||
551 | #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ | |
552 | ||
1da177e4 LT |
553 | #include <asm-generic/pgtable.h> |
554 | ||
22f1fdfd WZ |
555 | /* |
556 | * uncached accelerated TLB map for video memory access | |
557 | */ | |
558 | #ifdef CONFIG_CPU_SUPPORTS_UNCACHED_ACCELERATED | |
559 | #define __HAVE_PHYS_MEM_ACCESS_PROT | |
560 | ||
561 | struct file; | |
562 | pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn, | |
563 | unsigned long size, pgprot_t vma_prot); | |
564 | int phys_mem_access_prot_allowed(struct file *file, unsigned long pfn, | |
565 | unsigned long size, pgprot_t *vma_prot); | |
566 | #endif | |
567 | ||
1da177e4 LT |
568 | /* |
569 | * We provide our own get_unmapped area to cope with the virtual aliasing | |
570 | * constraints placed on us by the cache architecture. | |
571 | */ | |
572 | #define HAVE_ARCH_UNMAPPED_AREA | |
d0be89f6 | 573 | #define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN |
1da177e4 LT |
574 | |
575 | /* | |
576 | * No page table caches to initialise | |
577 | */ | |
578 | #define pgtable_cache_init() do { } while (0) | |
579 | ||
580 | #endif /* _ASM_PGTABLE_H */ |