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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 | ||
82f4f66d | 20 | #include <asm/cmpxchg.h> |
f10fae02 | 21 | #include <asm/io.h> |
1da177e4 | 22 | #include <asm/pgtable-bits.h> |
446f062b | 23 | #include <asm/cpu-features.h> |
1da177e4 | 24 | |
8c65b4a6 TS |
25 | struct mm_struct; |
26 | struct vm_area_struct; | |
27 | ||
780602d7 | 28 | #define PAGE_NONE __pgprot(_PAGE_PRESENT | _PAGE_NO_READ | \ |
6d037de9 | 29 | _page_cachable_default) |
780602d7 | 30 | #define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_WRITE | \ |
35133692 | 31 | _page_cachable_default) |
780602d7 | 32 | #define PAGE_COPY __pgprot(_PAGE_PRESENT | _PAGE_NO_EXEC | \ |
be0c37c9 | 33 | _page_cachable_default) |
780602d7 | 34 | #define PAGE_READONLY __pgprot(_PAGE_PRESENT | \ |
35133692 | 35 | _page_cachable_default) |
1da177e4 | 36 | #define PAGE_KERNEL __pgprot(_PAGE_PRESENT | __READABLE | __WRITEABLE | \ |
35133692 | 37 | _PAGE_GLOBAL | _page_cachable_default) |
e2a9e5ad PB |
38 | #define PAGE_KERNEL_NC __pgprot(_PAGE_PRESENT | __READABLE | __WRITEABLE | \ |
39 | _PAGE_GLOBAL | _CACHE_CACHABLE_NONCOHERENT) | |
780602d7 | 40 | #define PAGE_USERIO __pgprot(_PAGE_PRESENT | _PAGE_WRITE | \ |
35133692 | 41 | _page_cachable_default) |
1da177e4 LT |
42 | #define PAGE_KERNEL_UNCACHED __pgprot(_PAGE_PRESENT | __READABLE | \ |
43 | __WRITEABLE | _PAGE_GLOBAL | _CACHE_UNCACHED) | |
44 | ||
45 | /* | |
6dd9344c DD |
46 | * If _PAGE_NO_EXEC is not defined, we can't do page protection for |
47 | * execute, and consider it to be the same as read. Also, write | |
48 | * permissions imply read permissions. This is the closest we can get | |
49 | * by reasonable means.. | |
1da177e4 | 50 | */ |
1da177e4 | 51 | |
35133692 CD |
52 | /* |
53 | * Dummy values to fill the table in mmap.c | |
54 | * The real values will be generated at runtime | |
55 | */ | |
56 | #define __P000 __pgprot(0) | |
57 | #define __P001 __pgprot(0) | |
58 | #define __P010 __pgprot(0) | |
59 | #define __P011 __pgprot(0) | |
60 | #define __P100 __pgprot(0) | |
61 | #define __P101 __pgprot(0) | |
62 | #define __P110 __pgprot(0) | |
63 | #define __P111 __pgprot(0) | |
64 | ||
65 | #define __S000 __pgprot(0) | |
66 | #define __S001 __pgprot(0) | |
67 | #define __S010 __pgprot(0) | |
68 | #define __S011 __pgprot(0) | |
69 | #define __S100 __pgprot(0) | |
70 | #define __S101 __pgprot(0) | |
71 | #define __S110 __pgprot(0) | |
72 | #define __S111 __pgprot(0) | |
73 | ||
74 | extern unsigned long _page_cachable_default; | |
1da177e4 LT |
75 | |
76 | /* | |
77 | * ZERO_PAGE is a global shared page that is always zero; used | |
78 | * for zero-mapped memory areas etc.. | |
79 | */ | |
80 | ||
81 | extern unsigned long empty_zero_page; | |
82 | extern unsigned long zero_page_mask; | |
83 | ||
84 | #define ZERO_PAGE(vaddr) \ | |
99e3b942 | 85 | (virt_to_page((void *)(empty_zero_page + (((unsigned long)(vaddr)) & zero_page_mask)))) |
816422ad | 86 | #define __HAVE_COLOR_ZERO_PAGE |
62eede62 | 87 | |
1da177e4 LT |
88 | extern void paging_init(void); |
89 | ||
90 | /* | |
91 | * Conversion functions: convert a page and protection to a page entry, | |
92 | * and a page entry and page directory to the page they refer to. | |
93 | */ | |
c9d06962 | 94 | #define pmd_phys(pmd) virt_to_phys((void *)pmd_val(pmd)) |
970d032f RB |
95 | |
96 | #define __pmd_page(pmd) (pfn_to_page(pmd_phys(pmd) >> PAGE_SHIFT)) | |
97 | #ifndef CONFIG_TRANSPARENT_HUGEPAGE | |
98 | #define pmd_page(pmd) __pmd_page(pmd) | |
99 | #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ | |
100 | ||
46a82b2d | 101 | #define pmd_page_vaddr(pmd) pmd_val(pmd) |
1da177e4 | 102 | |
f1014d1b MC |
103 | #define htw_stop() \ |
104 | do { \ | |
ed4cbc81 MC |
105 | unsigned long flags; \ |
106 | \ | |
461d1597 | 107 | if (cpu_has_htw) { \ |
ed4cbc81 MC |
108 | local_irq_save(flags); \ |
109 | if(!raw_current_cpu_data.htw_seq++) { \ | |
110 | write_c0_pwctl(read_c0_pwctl() & \ | |
111 | ~(1 << MIPS_PWCTL_PWEN_SHIFT)); \ | |
112 | back_to_back_c0_hazard(); \ | |
113 | } \ | |
114 | local_irq_restore(flags); \ | |
461d1597 | 115 | } \ |
f1014d1b MC |
116 | } while(0) |
117 | ||
118 | #define htw_start() \ | |
119 | do { \ | |
ed4cbc81 MC |
120 | unsigned long flags; \ |
121 | \ | |
f1014d1b | 122 | if (cpu_has_htw) { \ |
ed4cbc81 MC |
123 | local_irq_save(flags); \ |
124 | if (!--raw_current_cpu_data.htw_seq) { \ | |
125 | write_c0_pwctl(read_c0_pwctl() | \ | |
126 | (1 << MIPS_PWCTL_PWEN_SHIFT)); \ | |
127 | back_to_back_c0_hazard(); \ | |
128 | } \ | |
129 | local_irq_restore(flags); \ | |
f1014d1b MC |
130 | } \ |
131 | } while(0) | |
132 | ||
37d22a0d PB |
133 | static inline void set_pte_at(struct mm_struct *mm, unsigned long addr, |
134 | pte_t *ptep, pte_t pteval); | |
135 | ||
34adb28d | 136 | #if defined(CONFIG_PHYS_ADDR_T_64BIT) && defined(CONFIG_CPU_MIPS32) |
6e953891 | 137 | |
7b2cb64f PB |
138 | #ifdef CONFIG_XPA |
139 | # define pte_none(pte) (!(((pte).pte_high) & ~_PAGE_GLOBAL)) | |
140 | #else | |
141 | # define pte_none(pte) (!(((pte).pte_low | (pte).pte_high) & ~_PAGE_GLOBAL)) | |
142 | #endif | |
143 | ||
6e953891 | 144 | #define pte_present(pte) ((pte).pte_low & _PAGE_PRESENT) |
37d22a0d | 145 | #define pte_no_exec(pte) ((pte).pte_low & _PAGE_NO_EXEC) |
6e953891 | 146 | |
1da177e4 LT |
147 | static inline void set_pte(pte_t *ptep, pte_t pte) |
148 | { | |
149 | ptep->pte_high = pte.pte_high; | |
150 | smp_wmb(); | |
151 | ptep->pte_low = pte.pte_low; | |
1da177e4 | 152 | |
7b2cb64f | 153 | #ifdef CONFIG_XPA |
c5b36783 | 154 | if (pte.pte_high & _PAGE_GLOBAL) { |
7b2cb64f PB |
155 | #else |
156 | if (pte.pte_low & _PAGE_GLOBAL) { | |
157 | #endif | |
1da177e4 LT |
158 | pte_t *buddy = ptep_buddy(ptep); |
159 | /* | |
160 | * Make sure the buddy is global too (if it's !none, | |
161 | * it better already be global) | |
162 | */ | |
7b2cb64f | 163 | if (pte_none(*buddy)) { |
97f2645f | 164 | if (!IS_ENABLED(CONFIG_XPA)) |
7b2cb64f | 165 | buddy->pte_low |= _PAGE_GLOBAL; |
6e953891 | 166 | buddy->pte_high |= _PAGE_GLOBAL; |
7b2cb64f | 167 | } |
1da177e4 LT |
168 | } |
169 | } | |
1da177e4 LT |
170 | |
171 | static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep) | |
172 | { | |
6e953891 SS |
173 | pte_t null = __pte(0); |
174 | ||
fde3538a | 175 | htw_stop(); |
1da177e4 | 176 | /* Preserve global status for the pair */ |
97f2645f | 177 | if (IS_ENABLED(CONFIG_XPA)) { |
7b2cb64f PB |
178 | if (ptep_buddy(ptep)->pte_high & _PAGE_GLOBAL) |
179 | null.pte_high = _PAGE_GLOBAL; | |
180 | } else { | |
181 | if (ptep_buddy(ptep)->pte_low & _PAGE_GLOBAL) | |
182 | null.pte_low = null.pte_high = _PAGE_GLOBAL; | |
183 | } | |
6e953891 SS |
184 | |
185 | set_pte_at(mm, addr, ptep, null); | |
fde3538a | 186 | htw_start(); |
1da177e4 LT |
187 | } |
188 | #else | |
6e953891 SS |
189 | |
190 | #define pte_none(pte) (!(pte_val(pte) & ~_PAGE_GLOBAL)) | |
191 | #define pte_present(pte) (pte_val(pte) & _PAGE_PRESENT) | |
37d22a0d | 192 | #define pte_no_exec(pte) (pte_val(pte) & _PAGE_NO_EXEC) |
6e953891 | 193 | |
1da177e4 LT |
194 | /* |
195 | * Certain architectures need to do special things when pte's | |
196 | * within a page table are directly modified. Thus, the following | |
197 | * hook is made available. | |
198 | */ | |
199 | static inline void set_pte(pte_t *ptep, pte_t pteval) | |
200 | { | |
201 | *ptep = pteval; | |
54746829 | 202 | #if !defined(CONFIG_CPU_R3K_TLB) |
1da177e4 LT |
203 | if (pte_val(pteval) & _PAGE_GLOBAL) { |
204 | pte_t *buddy = ptep_buddy(ptep); | |
205 | /* | |
206 | * Make sure the buddy is global too (if it's !none, | |
207 | * it better already be global) | |
208 | */ | |
c7e2d71d PB |
209 | # if defined(CONFIG_PHYS_ADDR_T_64BIT) && !defined(CONFIG_CPU_MIPS32) |
210 | cmpxchg64(&buddy->pte, 0, _PAGE_GLOBAL); | |
211 | # else | |
82f4f66d | 212 | cmpxchg(&buddy->pte, 0, _PAGE_GLOBAL); |
c7e2d71d | 213 | # endif |
1da177e4 LT |
214 | } |
215 | #endif | |
216 | } | |
1da177e4 LT |
217 | |
218 | static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep) | |
219 | { | |
fde3538a | 220 | htw_stop(); |
54746829 | 221 | #if !defined(CONFIG_CPU_R3K_TLB) |
1da177e4 LT |
222 | /* Preserve global status for the pair */ |
223 | if (pte_val(*ptep_buddy(ptep)) & _PAGE_GLOBAL) | |
224 | set_pte_at(mm, addr, ptep, __pte(_PAGE_GLOBAL)); | |
225 | else | |
226 | #endif | |
227 | set_pte_at(mm, addr, ptep, __pte(0)); | |
fde3538a | 228 | htw_start(); |
1da177e4 LT |
229 | } |
230 | #endif | |
231 | ||
37d22a0d PB |
232 | static inline void set_pte_at(struct mm_struct *mm, unsigned long addr, |
233 | pte_t *ptep, pte_t pteval) | |
234 | { | |
235 | extern void __update_cache(unsigned long address, pte_t pte); | |
236 | ||
237 | if (!pte_present(pteval)) | |
238 | goto cache_sync_done; | |
239 | ||
240 | if (pte_present(*ptep) && (pte_pfn(*ptep) == pte_pfn(pteval))) | |
241 | goto cache_sync_done; | |
242 | ||
243 | __update_cache(addr, pteval); | |
244 | cache_sync_done: | |
245 | set_pte(ptep, pteval); | |
246 | } | |
247 | ||
1da177e4 | 248 | /* |
c6e8b587 | 249 | * (pmds are folded into puds so this doesn't get actually called, |
1da177e4 LT |
250 | * but the define is needed for a generic inline function.) |
251 | */ | |
252 | #define set_pmd(pmdptr, pmdval) do { *(pmdptr) = (pmdval); } while(0) | |
c6e8b587 | 253 | |
325f8a0a | 254 | #ifndef __PAGETABLE_PMD_FOLDED |
c6e8b587 RB |
255 | /* |
256 | * (puds are folded into pgds so this doesn't get actually called, | |
257 | * but the define is needed for a generic inline function.) | |
258 | */ | |
259 | #define set_pud(pudptr, pudval) do { *(pudptr) = (pudval); } while(0) | |
260 | #endif | |
1da177e4 | 261 | |
5ff97472 RB |
262 | #define PGD_T_LOG2 (__builtin_ffs(sizeof(pgd_t)) - 1) |
263 | #define PMD_T_LOG2 (__builtin_ffs(sizeof(pmd_t)) - 1) | |
264 | #define PTE_T_LOG2 (__builtin_ffs(sizeof(pte_t)) - 1) | |
1da177e4 | 265 | |
9975e77d RB |
266 | /* |
267 | * We used to declare this array with size but gcc 3.3 and older are not able | |
268 | * to find that this expression is a constant, so the size is dropped. | |
269 | */ | |
270 | extern pgd_t swapper_pg_dir[]; | |
1da177e4 LT |
271 | |
272 | /* | |
273 | * The following only work if pte_present() is true. | |
274 | * Undefined behaviour if not.. | |
275 | */ | |
34adb28d | 276 | #if defined(CONFIG_PHYS_ADDR_T_64BIT) && defined(CONFIG_CPU_MIPS32) |
6e953891 SS |
277 | static inline int pte_write(pte_t pte) { return pte.pte_low & _PAGE_WRITE; } |
278 | static inline int pte_dirty(pte_t pte) { return pte.pte_low & _PAGE_MODIFIED; } | |
279 | static inline int pte_young(pte_t pte) { return pte.pte_low & _PAGE_ACCESSED; } | |
61cbfff4 | 280 | static inline int pte_special(pte_t pte) { return pte.pte_low & _PAGE_SPECIAL; } |
6e953891 | 281 | |
1da177e4 LT |
282 | static inline pte_t pte_wrprotect(pte_t pte) |
283 | { | |
c5b36783 | 284 | pte.pte_low &= ~_PAGE_WRITE; |
97f2645f | 285 | if (!IS_ENABLED(CONFIG_XPA)) |
7b2cb64f | 286 | pte.pte_low &= ~_PAGE_SILENT_WRITE; |
6e953891 | 287 | pte.pte_high &= ~_PAGE_SILENT_WRITE; |
1da177e4 LT |
288 | return pte; |
289 | } | |
290 | ||
1da177e4 LT |
291 | static inline pte_t pte_mkclean(pte_t pte) |
292 | { | |
c5b36783 | 293 | pte.pte_low &= ~_PAGE_MODIFIED; |
97f2645f | 294 | if (!IS_ENABLED(CONFIG_XPA)) |
7b2cb64f | 295 | pte.pte_low &= ~_PAGE_SILENT_WRITE; |
6e953891 | 296 | pte.pte_high &= ~_PAGE_SILENT_WRITE; |
1da177e4 LT |
297 | return pte; |
298 | } | |
299 | ||
300 | static inline pte_t pte_mkold(pte_t pte) | |
301 | { | |
c5b36783 | 302 | pte.pte_low &= ~_PAGE_ACCESSED; |
97f2645f | 303 | if (!IS_ENABLED(CONFIG_XPA)) |
7b2cb64f | 304 | pte.pte_low &= ~_PAGE_SILENT_READ; |
6e953891 | 305 | pte.pte_high &= ~_PAGE_SILENT_READ; |
1da177e4 LT |
306 | return pte; |
307 | } | |
308 | ||
309 | static inline pte_t pte_mkwrite(pte_t pte) | |
310 | { | |
6e953891 | 311 | pte.pte_low |= _PAGE_WRITE; |
7b2cb64f | 312 | if (pte.pte_low & _PAGE_MODIFIED) { |
97f2645f | 313 | if (!IS_ENABLED(CONFIG_XPA)) |
7b2cb64f | 314 | pte.pte_low |= _PAGE_SILENT_WRITE; |
6e953891 | 315 | pte.pte_high |= _PAGE_SILENT_WRITE; |
7b2cb64f | 316 | } |
1da177e4 LT |
317 | return pte; |
318 | } | |
319 | ||
1da177e4 LT |
320 | static inline pte_t pte_mkdirty(pte_t pte) |
321 | { | |
6e953891 | 322 | pte.pte_low |= _PAGE_MODIFIED; |
7b2cb64f | 323 | if (pte.pte_low & _PAGE_WRITE) { |
97f2645f | 324 | if (!IS_ENABLED(CONFIG_XPA)) |
7b2cb64f | 325 | pte.pte_low |= _PAGE_SILENT_WRITE; |
6e953891 | 326 | pte.pte_high |= _PAGE_SILENT_WRITE; |
7b2cb64f | 327 | } |
1da177e4 LT |
328 | return pte; |
329 | } | |
330 | ||
331 | static inline pte_t pte_mkyoung(pte_t pte) | |
332 | { | |
6e953891 | 333 | pte.pte_low |= _PAGE_ACCESSED; |
7b2cb64f | 334 | if (!(pte.pte_low & _PAGE_NO_READ)) { |
97f2645f | 335 | if (!IS_ENABLED(CONFIG_XPA)) |
7b2cb64f | 336 | pte.pte_low |= _PAGE_SILENT_READ; |
6e953891 | 337 | pte.pte_high |= _PAGE_SILENT_READ; |
7b2cb64f | 338 | } |
1da177e4 LT |
339 | return pte; |
340 | } | |
61cbfff4 DK |
341 | |
342 | static inline pte_t pte_mkspecial(pte_t pte) | |
343 | { | |
344 | pte.pte_low |= _PAGE_SPECIAL; | |
345 | return pte; | |
346 | } | |
1da177e4 | 347 | #else |
1da177e4 LT |
348 | static inline int pte_write(pte_t pte) { return pte_val(pte) & _PAGE_WRITE; } |
349 | static inline int pte_dirty(pte_t pte) { return pte_val(pte) & _PAGE_MODIFIED; } | |
350 | static inline int pte_young(pte_t pte) { return pte_val(pte) & _PAGE_ACCESSED; } | |
61cbfff4 | 351 | static inline int pte_special(pte_t pte) { return pte_val(pte) & _PAGE_SPECIAL; } |
1da177e4 LT |
352 | |
353 | static inline pte_t pte_wrprotect(pte_t pte) | |
354 | { | |
355 | pte_val(pte) &= ~(_PAGE_WRITE | _PAGE_SILENT_WRITE); | |
356 | return pte; | |
357 | } | |
358 | ||
1da177e4 LT |
359 | static inline pte_t pte_mkclean(pte_t pte) |
360 | { | |
77a5c593 | 361 | pte_val(pte) &= ~(_PAGE_MODIFIED | _PAGE_SILENT_WRITE); |
1da177e4 LT |
362 | return pte; |
363 | } | |
364 | ||
365 | static inline pte_t pte_mkold(pte_t pte) | |
366 | { | |
77a5c593 | 367 | pte_val(pte) &= ~(_PAGE_ACCESSED | _PAGE_SILENT_READ); |
1da177e4 LT |
368 | return pte; |
369 | } | |
370 | ||
371 | static inline pte_t pte_mkwrite(pte_t pte) | |
372 | { | |
373 | pte_val(pte) |= _PAGE_WRITE; | |
374 | if (pte_val(pte) & _PAGE_MODIFIED) | |
375 | pte_val(pte) |= _PAGE_SILENT_WRITE; | |
376 | return pte; | |
377 | } | |
378 | ||
1da177e4 LT |
379 | static inline pte_t pte_mkdirty(pte_t pte) |
380 | { | |
381 | pte_val(pte) |= _PAGE_MODIFIED; | |
382 | if (pte_val(pte) & _PAGE_WRITE) | |
383 | pte_val(pte) |= _PAGE_SILENT_WRITE; | |
384 | return pte; | |
385 | } | |
386 | ||
387 | static inline pte_t pte_mkyoung(pte_t pte) | |
388 | { | |
389 | pte_val(pte) |= _PAGE_ACCESSED; | |
be0c37c9 SH |
390 | if (!(pte_val(pte) & _PAGE_NO_READ)) |
391 | pte_val(pte) |= _PAGE_SILENT_READ; | |
1da177e4 LT |
392 | return pte; |
393 | } | |
dd794392 | 394 | |
61cbfff4 DK |
395 | static inline pte_t pte_mkspecial(pte_t pte) |
396 | { | |
397 | pte_val(pte) |= _PAGE_SPECIAL; | |
398 | return pte; | |
399 | } | |
400 | ||
05f9883a | 401 | #ifdef CONFIG_MIPS_HUGE_TLB_SUPPORT |
dd794392 DD |
402 | static inline int pte_huge(pte_t pte) { return pte_val(pte) & _PAGE_HUGE; } |
403 | ||
404 | static inline pte_t pte_mkhuge(pte_t pte) | |
405 | { | |
406 | pte_val(pte) |= _PAGE_HUGE; | |
407 | return pte; | |
408 | } | |
05f9883a | 409 | #endif /* CONFIG_MIPS_HUGE_TLB_SUPPORT */ |
1da177e4 LT |
410 | #endif |
411 | ||
412 | /* | |
70342287 | 413 | * Macro to make mark a page protection value as "uncacheable". Note |
1da177e4 LT |
414 | * that "protection" is really a misnomer here as the protection value |
415 | * contains the memory attribute bits, dirty bits, and various other | |
416 | * bits as well. | |
417 | */ | |
418 | #define pgprot_noncached pgprot_noncached | |
419 | ||
420 | static inline pgprot_t pgprot_noncached(pgprot_t _prot) | |
421 | { | |
422 | unsigned long prot = pgprot_val(_prot); | |
423 | ||
424 | prot = (prot & ~_CACHE_MASK) | _CACHE_UNCACHED; | |
425 | ||
426 | return __pgprot(prot); | |
427 | } | |
428 | ||
c4687b15 AS |
429 | #define pgprot_writecombine pgprot_writecombine |
430 | ||
4b050ba7 MC |
431 | static inline pgprot_t pgprot_writecombine(pgprot_t _prot) |
432 | { | |
433 | unsigned long prot = pgprot_val(_prot); | |
434 | ||
435 | /* cpu_data[0].writecombine is already shifted by _CACHE_SHIFT */ | |
436 | prot = (prot & ~_CACHE_MASK) | cpu_data[0].writecombine; | |
437 | ||
438 | return __pgprot(prot); | |
439 | } | |
440 | ||
1da177e4 LT |
441 | /* |
442 | * Conversion functions: convert a page and protection to a page entry, | |
443 | * and a page entry and page directory to the page they refer to. | |
444 | */ | |
445 | #define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot)) | |
446 | ||
7b2cb64f | 447 | #if defined(CONFIG_XPA) |
1da177e4 LT |
448 | static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) |
449 | { | |
c5b36783 | 450 | pte.pte_low &= (_PAGE_MODIFIED | _PAGE_ACCESSED | _PFNX_MASK); |
77a5c593 | 451 | pte.pte_high &= (_PFN_MASK | _CACHE_MASK); |
c5b36783 | 452 | pte.pte_low |= pgprot_val(newprot) & ~_PFNX_MASK; |
6d037de9 | 453 | pte.pte_high |= pgprot_val(newprot) & ~(_PFN_MASK | _CACHE_MASK); |
1da177e4 LT |
454 | return pte; |
455 | } | |
7b2cb64f PB |
456 | #elif defined(CONFIG_PHYS_ADDR_T_64BIT) && defined(CONFIG_CPU_MIPS32) |
457 | static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) | |
458 | { | |
459 | pte.pte_low &= _PAGE_CHG_MASK; | |
460 | pte.pte_high &= (_PFN_MASK | _CACHE_MASK); | |
461 | pte.pte_low |= pgprot_val(newprot); | |
462 | pte.pte_high |= pgprot_val(newprot) & ~(_PFN_MASK | _CACHE_MASK); | |
463 | return pte; | |
464 | } | |
1da177e4 LT |
465 | #else |
466 | static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) | |
467 | { | |
6d037de9 RB |
468 | return __pte((pte_val(pte) & _PAGE_CHG_MASK) | |
469 | (pgprot_val(newprot) & ~_PAGE_CHG_MASK)); | |
1da177e4 LT |
470 | } |
471 | #endif | |
472 | ||
473 | ||
474 | extern void __update_tlb(struct vm_area_struct *vma, unsigned long address, | |
475 | pte_t pte); | |
1da177e4 LT |
476 | |
477 | static inline void update_mmu_cache(struct vm_area_struct *vma, | |
4b3073e1 | 478 | unsigned long address, pte_t *ptep) |
1da177e4 | 479 | { |
4b3073e1 | 480 | pte_t pte = *ptep; |
1da177e4 | 481 | __update_tlb(vma, address, pte); |
1da177e4 LT |
482 | } |
483 | ||
970d032f RB |
484 | static inline void update_mmu_cache_pmd(struct vm_area_struct *vma, |
485 | unsigned long address, pmd_t *pmdp) | |
486 | { | |
487 | pte_t pte = *(pte_t *)pmdp; | |
488 | ||
489 | __update_tlb(vma, address, pte); | |
490 | } | |
491 | ||
1da177e4 | 492 | #define kern_addr_valid(addr) (1) |
1da177e4 | 493 | |
34adb28d | 494 | #ifdef CONFIG_PHYS_ADDR_T_64BIT |
1da177e4 LT |
495 | extern int remap_pfn_range(struct vm_area_struct *vma, unsigned long from, unsigned long pfn, unsigned long size, pgprot_t prot); |
496 | ||
1da177e4 LT |
497 | static inline int io_remap_pfn_range(struct vm_area_struct *vma, |
498 | unsigned long vaddr, | |
499 | unsigned long pfn, | |
500 | unsigned long size, | |
501 | pgprot_t prot) | |
502 | { | |
15d45cce | 503 | phys_addr_t phys_addr_high = fixup_bigphys_addr(pfn << PAGE_SHIFT, size); |
ac5d8c02 | 504 | return remap_pfn_range(vma, vaddr, phys_addr_high >> PAGE_SHIFT, size, prot); |
1da177e4 | 505 | } |
40d158e6 | 506 | #define io_remap_pfn_range io_remap_pfn_range |
1da177e4 LT |
507 | #endif |
508 | ||
970d032f RB |
509 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
510 | ||
b6b34b2d KS |
511 | /* We don't have hardware dirty/accessed bits, generic_pmdp_establish is fine.*/ |
512 | #define pmdp_establish generic_pmdp_establish | |
513 | ||
fd8cfd30 | 514 | #define has_transparent_hugepage has_transparent_hugepage |
970d032f RB |
515 | extern int has_transparent_hugepage(void); |
516 | ||
517 | static inline int pmd_trans_huge(pmd_t pmd) | |
518 | { | |
519 | return !!(pmd_val(pmd) & _PAGE_HUGE); | |
520 | } | |
521 | ||
522 | static inline pmd_t pmd_mkhuge(pmd_t pmd) | |
523 | { | |
524 | pmd_val(pmd) |= _PAGE_HUGE; | |
525 | ||
526 | return pmd; | |
527 | } | |
528 | ||
970d032f RB |
529 | extern void set_pmd_at(struct mm_struct *mm, unsigned long addr, |
530 | pmd_t *pmdp, pmd_t pmd); | |
531 | ||
e4e40e02 | 532 | #define pmd_write pmd_write |
970d032f RB |
533 | static inline int pmd_write(pmd_t pmd) |
534 | { | |
535 | return !!(pmd_val(pmd) & _PAGE_WRITE); | |
536 | } | |
537 | ||
538 | static inline pmd_t pmd_wrprotect(pmd_t pmd) | |
539 | { | |
540 | pmd_val(pmd) &= ~(_PAGE_WRITE | _PAGE_SILENT_WRITE); | |
541 | return pmd; | |
542 | } | |
543 | ||
544 | static inline pmd_t pmd_mkwrite(pmd_t pmd) | |
545 | { | |
546 | pmd_val(pmd) |= _PAGE_WRITE; | |
547 | if (pmd_val(pmd) & _PAGE_MODIFIED) | |
548 | pmd_val(pmd) |= _PAGE_SILENT_WRITE; | |
549 | ||
550 | return pmd; | |
551 | } | |
552 | ||
553 | static inline int pmd_dirty(pmd_t pmd) | |
554 | { | |
555 | return !!(pmd_val(pmd) & _PAGE_MODIFIED); | |
556 | } | |
557 | ||
558 | static inline pmd_t pmd_mkclean(pmd_t pmd) | |
559 | { | |
560 | pmd_val(pmd) &= ~(_PAGE_MODIFIED | _PAGE_SILENT_WRITE); | |
561 | return pmd; | |
562 | } | |
563 | ||
564 | static inline pmd_t pmd_mkdirty(pmd_t pmd) | |
565 | { | |
566 | pmd_val(pmd) |= _PAGE_MODIFIED; | |
567 | if (pmd_val(pmd) & _PAGE_WRITE) | |
568 | pmd_val(pmd) |= _PAGE_SILENT_WRITE; | |
569 | ||
570 | return pmd; | |
571 | } | |
572 | ||
573 | static inline int pmd_young(pmd_t pmd) | |
574 | { | |
575 | return !!(pmd_val(pmd) & _PAGE_ACCESSED); | |
576 | } | |
577 | ||
578 | static inline pmd_t pmd_mkold(pmd_t pmd) | |
579 | { | |
580 | pmd_val(pmd) &= ~(_PAGE_ACCESSED|_PAGE_SILENT_READ); | |
581 | ||
582 | return pmd; | |
583 | } | |
584 | ||
585 | static inline pmd_t pmd_mkyoung(pmd_t pmd) | |
586 | { | |
587 | pmd_val(pmd) |= _PAGE_ACCESSED; | |
588 | ||
be0c37c9 SH |
589 | if (!(pmd_val(pmd) & _PAGE_NO_READ)) |
590 | pmd_val(pmd) |= _PAGE_SILENT_READ; | |
970d032f RB |
591 | |
592 | return pmd; | |
593 | } | |
594 | ||
595 | /* Extern to avoid header file madness */ | |
596 | extern pmd_t mk_pmd(struct page *page, pgprot_t prot); | |
597 | ||
598 | static inline unsigned long pmd_pfn(pmd_t pmd) | |
599 | { | |
600 | return pmd_val(pmd) >> _PFN_SHIFT; | |
601 | } | |
602 | ||
603 | static inline struct page *pmd_page(pmd_t pmd) | |
604 | { | |
605 | if (pmd_trans_huge(pmd)) | |
606 | return pfn_to_page(pmd_pfn(pmd)); | |
607 | ||
608 | return pfn_to_page(pmd_phys(pmd) >> PAGE_SHIFT); | |
609 | } | |
610 | ||
611 | static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot) | |
612 | { | |
88d02a2b | 613 | pmd_val(pmd) = (pmd_val(pmd) & (_PAGE_CHG_MASK | _PAGE_HUGE)) | |
6d037de9 | 614 | (pgprot_val(newprot) & ~_PAGE_CHG_MASK); |
970d032f RB |
615 | return pmd; |
616 | } | |
617 | ||
618 | static inline pmd_t pmd_mknotpresent(pmd_t pmd) | |
619 | { | |
620 | pmd_val(pmd) &= ~(_PAGE_PRESENT | _PAGE_VALID | _PAGE_DIRTY); | |
621 | ||
622 | return pmd; | |
623 | } | |
624 | ||
625 | /* | |
8809aa2d | 626 | * The generic version pmdp_huge_get_and_clear uses a version of pmd_clear() with a |
970d032f RB |
627 | * different prototype. |
628 | */ | |
8809aa2d AK |
629 | #define __HAVE_ARCH_PMDP_HUGE_GET_AND_CLEAR |
630 | static inline pmd_t pmdp_huge_get_and_clear(struct mm_struct *mm, | |
631 | unsigned long address, pmd_t *pmdp) | |
970d032f RB |
632 | { |
633 | pmd_t old = *pmdp; | |
634 | ||
635 | pmd_clear(pmdp); | |
636 | ||
637 | return old; | |
638 | } | |
639 | ||
640 | #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ | |
641 | ||
446f062b CH |
642 | #define gup_fast_permitted(start, end) (!cpu_has_dc_aliases) |
643 | ||
1da177e4 LT |
644 | #include <asm-generic/pgtable.h> |
645 | ||
22f1fdfd WZ |
646 | /* |
647 | * uncached accelerated TLB map for video memory access | |
648 | */ | |
649 | #ifdef CONFIG_CPU_SUPPORTS_UNCACHED_ACCELERATED | |
650 | #define __HAVE_PHYS_MEM_ACCESS_PROT | |
651 | ||
652 | struct file; | |
653 | pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn, | |
654 | unsigned long size, pgprot_t vma_prot); | |
22f1fdfd WZ |
655 | #endif |
656 | ||
1da177e4 LT |
657 | /* |
658 | * We provide our own get_unmapped area to cope with the virtual aliasing | |
659 | * constraints placed on us by the cache architecture. | |
660 | */ | |
661 | #define HAVE_ARCH_UNMAPPED_AREA | |
d0be89f6 | 662 | #define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN |
1da177e4 | 663 | |
1da177e4 | 664 | #endif /* _ASM_PGTABLE_H */ |