]>
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 | ||
780602d7 | 26 | #define PAGE_NONE __pgprot(_PAGE_PRESENT | _PAGE_NO_READ | \ |
6d037de9 | 27 | _page_cachable_default) |
780602d7 | 28 | #define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_WRITE | \ |
35133692 | 29 | _page_cachable_default) |
780602d7 | 30 | #define PAGE_COPY __pgprot(_PAGE_PRESENT | _PAGE_NO_EXEC | \ |
be0c37c9 | 31 | _page_cachable_default) |
780602d7 | 32 | #define PAGE_READONLY __pgprot(_PAGE_PRESENT | \ |
35133692 | 33 | _page_cachable_default) |
1da177e4 | 34 | #define PAGE_KERNEL __pgprot(_PAGE_PRESENT | __READABLE | __WRITEABLE | \ |
35133692 | 35 | _PAGE_GLOBAL | _page_cachable_default) |
e2a9e5ad PB |
36 | #define PAGE_KERNEL_NC __pgprot(_PAGE_PRESENT | __READABLE | __WRITEABLE | \ |
37 | _PAGE_GLOBAL | _CACHE_CACHABLE_NONCOHERENT) | |
780602d7 | 38 | #define PAGE_USERIO __pgprot(_PAGE_PRESENT | _PAGE_WRITE | \ |
35133692 | 39 | _page_cachable_default) |
1da177e4 LT |
40 | #define PAGE_KERNEL_UNCACHED __pgprot(_PAGE_PRESENT | __READABLE | \ |
41 | __WRITEABLE | _PAGE_GLOBAL | _CACHE_UNCACHED) | |
42 | ||
43 | /* | |
6dd9344c DD |
44 | * If _PAGE_NO_EXEC is not defined, we can't do page protection for |
45 | * execute, and consider it to be the same as read. Also, write | |
46 | * permissions imply read permissions. This is the closest we can get | |
47 | * by reasonable means.. | |
1da177e4 | 48 | */ |
1da177e4 | 49 | |
35133692 CD |
50 | /* |
51 | * Dummy values to fill the table in mmap.c | |
52 | * The real values will be generated at runtime | |
53 | */ | |
54 | #define __P000 __pgprot(0) | |
55 | #define __P001 __pgprot(0) | |
56 | #define __P010 __pgprot(0) | |
57 | #define __P011 __pgprot(0) | |
58 | #define __P100 __pgprot(0) | |
59 | #define __P101 __pgprot(0) | |
60 | #define __P110 __pgprot(0) | |
61 | #define __P111 __pgprot(0) | |
62 | ||
63 | #define __S000 __pgprot(0) | |
64 | #define __S001 __pgprot(0) | |
65 | #define __S010 __pgprot(0) | |
66 | #define __S011 __pgprot(0) | |
67 | #define __S100 __pgprot(0) | |
68 | #define __S101 __pgprot(0) | |
69 | #define __S110 __pgprot(0) | |
70 | #define __S111 __pgprot(0) | |
71 | ||
72 | extern unsigned long _page_cachable_default; | |
1da177e4 LT |
73 | |
74 | /* | |
75 | * ZERO_PAGE is a global shared page that is always zero; used | |
76 | * for zero-mapped memory areas etc.. | |
77 | */ | |
78 | ||
79 | extern unsigned long empty_zero_page; | |
80 | extern unsigned long zero_page_mask; | |
81 | ||
82 | #define ZERO_PAGE(vaddr) \ | |
99e3b942 | 83 | (virt_to_page((void *)(empty_zero_page + (((unsigned long)(vaddr)) & zero_page_mask)))) |
816422ad | 84 | #define __HAVE_COLOR_ZERO_PAGE |
62eede62 | 85 | |
1da177e4 LT |
86 | extern void paging_init(void); |
87 | ||
88 | /* | |
89 | * Conversion functions: convert a page and protection to a page entry, | |
90 | * and a page entry and page directory to the page they refer to. | |
91 | */ | |
c9d06962 | 92 | #define pmd_phys(pmd) virt_to_phys((void *)pmd_val(pmd)) |
970d032f RB |
93 | |
94 | #define __pmd_page(pmd) (pfn_to_page(pmd_phys(pmd) >> PAGE_SHIFT)) | |
95 | #ifndef CONFIG_TRANSPARENT_HUGEPAGE | |
96 | #define pmd_page(pmd) __pmd_page(pmd) | |
97 | #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ | |
98 | ||
46a82b2d | 99 | #define pmd_page_vaddr(pmd) pmd_val(pmd) |
1da177e4 | 100 | |
f1014d1b MC |
101 | #define htw_stop() \ |
102 | do { \ | |
ed4cbc81 MC |
103 | unsigned long flags; \ |
104 | \ | |
461d1597 | 105 | if (cpu_has_htw) { \ |
ed4cbc81 MC |
106 | local_irq_save(flags); \ |
107 | if(!raw_current_cpu_data.htw_seq++) { \ | |
108 | write_c0_pwctl(read_c0_pwctl() & \ | |
109 | ~(1 << MIPS_PWCTL_PWEN_SHIFT)); \ | |
110 | back_to_back_c0_hazard(); \ | |
111 | } \ | |
112 | local_irq_restore(flags); \ | |
461d1597 | 113 | } \ |
f1014d1b MC |
114 | } while(0) |
115 | ||
116 | #define htw_start() \ | |
117 | do { \ | |
ed4cbc81 MC |
118 | unsigned long flags; \ |
119 | \ | |
f1014d1b | 120 | if (cpu_has_htw) { \ |
ed4cbc81 MC |
121 | local_irq_save(flags); \ |
122 | if (!--raw_current_cpu_data.htw_seq) { \ | |
123 | write_c0_pwctl(read_c0_pwctl() | \ | |
124 | (1 << MIPS_PWCTL_PWEN_SHIFT)); \ | |
125 | back_to_back_c0_hazard(); \ | |
126 | } \ | |
127 | local_irq_restore(flags); \ | |
f1014d1b MC |
128 | } \ |
129 | } while(0) | |
130 | ||
37d22a0d PB |
131 | static inline void set_pte_at(struct mm_struct *mm, unsigned long addr, |
132 | pte_t *ptep, pte_t pteval); | |
133 | ||
34adb28d | 134 | #if defined(CONFIG_PHYS_ADDR_T_64BIT) && defined(CONFIG_CPU_MIPS32) |
6e953891 | 135 | |
7b2cb64f PB |
136 | #ifdef CONFIG_XPA |
137 | # define pte_none(pte) (!(((pte).pte_high) & ~_PAGE_GLOBAL)) | |
138 | #else | |
139 | # define pte_none(pte) (!(((pte).pte_low | (pte).pte_high) & ~_PAGE_GLOBAL)) | |
140 | #endif | |
141 | ||
6e953891 | 142 | #define pte_present(pte) ((pte).pte_low & _PAGE_PRESENT) |
37d22a0d | 143 | #define pte_no_exec(pte) ((pte).pte_low & _PAGE_NO_EXEC) |
6e953891 | 144 | |
1da177e4 LT |
145 | static inline void set_pte(pte_t *ptep, pte_t pte) |
146 | { | |
147 | ptep->pte_high = pte.pte_high; | |
148 | smp_wmb(); | |
149 | ptep->pte_low = pte.pte_low; | |
1da177e4 | 150 | |
7b2cb64f | 151 | #ifdef CONFIG_XPA |
c5b36783 | 152 | if (pte.pte_high & _PAGE_GLOBAL) { |
7b2cb64f PB |
153 | #else |
154 | if (pte.pte_low & _PAGE_GLOBAL) { | |
155 | #endif | |
1da177e4 LT |
156 | pte_t *buddy = ptep_buddy(ptep); |
157 | /* | |
158 | * Make sure the buddy is global too (if it's !none, | |
159 | * it better already be global) | |
160 | */ | |
7b2cb64f | 161 | if (pte_none(*buddy)) { |
97f2645f | 162 | if (!IS_ENABLED(CONFIG_XPA)) |
7b2cb64f | 163 | buddy->pte_low |= _PAGE_GLOBAL; |
6e953891 | 164 | buddy->pte_high |= _PAGE_GLOBAL; |
7b2cb64f | 165 | } |
1da177e4 LT |
166 | } |
167 | } | |
1da177e4 LT |
168 | |
169 | static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep) | |
170 | { | |
6e953891 SS |
171 | pte_t null = __pte(0); |
172 | ||
fde3538a | 173 | htw_stop(); |
1da177e4 | 174 | /* Preserve global status for the pair */ |
97f2645f | 175 | if (IS_ENABLED(CONFIG_XPA)) { |
7b2cb64f PB |
176 | if (ptep_buddy(ptep)->pte_high & _PAGE_GLOBAL) |
177 | null.pte_high = _PAGE_GLOBAL; | |
178 | } else { | |
179 | if (ptep_buddy(ptep)->pte_low & _PAGE_GLOBAL) | |
180 | null.pte_low = null.pte_high = _PAGE_GLOBAL; | |
181 | } | |
6e953891 SS |
182 | |
183 | set_pte_at(mm, addr, ptep, null); | |
fde3538a | 184 | htw_start(); |
1da177e4 LT |
185 | } |
186 | #else | |
6e953891 SS |
187 | |
188 | #define pte_none(pte) (!(pte_val(pte) & ~_PAGE_GLOBAL)) | |
189 | #define pte_present(pte) (pte_val(pte) & _PAGE_PRESENT) | |
37d22a0d | 190 | #define pte_no_exec(pte) (pte_val(pte) & _PAGE_NO_EXEC) |
6e953891 | 191 | |
1da177e4 LT |
192 | /* |
193 | * Certain architectures need to do special things when pte's | |
194 | * within a page table are directly modified. Thus, the following | |
195 | * hook is made available. | |
196 | */ | |
197 | static inline void set_pte(pte_t *ptep, pte_t pteval) | |
198 | { | |
199 | *ptep = pteval; | |
200 | #if !defined(CONFIG_CPU_R3000) && !defined(CONFIG_CPU_TX39XX) | |
201 | if (pte_val(pteval) & _PAGE_GLOBAL) { | |
202 | pte_t *buddy = ptep_buddy(ptep); | |
203 | /* | |
204 | * Make sure the buddy is global too (if it's !none, | |
205 | * it better already be global) | |
206 | */ | |
46011e6e DD |
207 | #ifdef CONFIG_SMP |
208 | /* | |
209 | * For SMP, multiple CPUs can race, so we need to do | |
210 | * this atomically. | |
211 | */ | |
46011e6e DD |
212 | unsigned long page_global = _PAGE_GLOBAL; |
213 | unsigned long tmp; | |
214 | ||
12863939 JK |
215 | if (kernel_uses_llsc && R10000_LLSC_WAR) { |
216 | __asm__ __volatile__ ( | |
12863939 | 217 | " .set push \n" |
378ed6f0 | 218 | " .set arch=r4000 \n" |
12863939 JK |
219 | " .set noreorder \n" |
220 | "1:" __LL "%[tmp], %[buddy] \n" | |
221 | " bnez %[tmp], 2f \n" | |
222 | " or %[tmp], %[tmp], %[global] \n" | |
223 | __SC "%[tmp], %[buddy] \n" | |
224 | " beqzl %[tmp], 1b \n" | |
225 | " nop \n" | |
226 | "2: \n" | |
227 | " .set pop \n" | |
12863939 | 228 | : [buddy] "+m" (buddy->pte), [tmp] "=&r" (tmp) |
46011e6e | 229 | : [global] "r" (page_global)); |
12863939 | 230 | } else if (kernel_uses_llsc) { |
e02e07e3 | 231 | loongson_llsc_mb(); |
12863939 | 232 | __asm__ __volatile__ ( |
12863939 | 233 | " .set push \n" |
378ed6f0 | 234 | " .set "MIPS_ISA_ARCH_LEVEL" \n" |
12863939 JK |
235 | " .set noreorder \n" |
236 | "1:" __LL "%[tmp], %[buddy] \n" | |
237 | " bnez %[tmp], 2f \n" | |
238 | " or %[tmp], %[tmp], %[global] \n" | |
239 | __SC "%[tmp], %[buddy] \n" | |
240 | " beqz %[tmp], 1b \n" | |
241 | " nop \n" | |
242 | "2: \n" | |
243 | " .set pop \n" | |
12863939 JK |
244 | : [buddy] "+m" (buddy->pte), [tmp] "=&r" (tmp) |
245 | : [global] "r" (page_global)); | |
e02e07e3 | 246 | loongson_llsc_mb(); |
12863939 | 247 | } |
46011e6e | 248 | #else /* !CONFIG_SMP */ |
1da177e4 LT |
249 | if (pte_none(*buddy)) |
250 | pte_val(*buddy) = pte_val(*buddy) | _PAGE_GLOBAL; | |
46011e6e | 251 | #endif /* CONFIG_SMP */ |
1da177e4 LT |
252 | } |
253 | #endif | |
254 | } | |
1da177e4 LT |
255 | |
256 | static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep) | |
257 | { | |
fde3538a | 258 | htw_stop(); |
1da177e4 LT |
259 | #if !defined(CONFIG_CPU_R3000) && !defined(CONFIG_CPU_TX39XX) |
260 | /* Preserve global status for the pair */ | |
261 | if (pte_val(*ptep_buddy(ptep)) & _PAGE_GLOBAL) | |
262 | set_pte_at(mm, addr, ptep, __pte(_PAGE_GLOBAL)); | |
263 | else | |
264 | #endif | |
265 | set_pte_at(mm, addr, ptep, __pte(0)); | |
fde3538a | 266 | htw_start(); |
1da177e4 LT |
267 | } |
268 | #endif | |
269 | ||
37d22a0d PB |
270 | static inline void set_pte_at(struct mm_struct *mm, unsigned long addr, |
271 | pte_t *ptep, pte_t pteval) | |
272 | { | |
273 | extern void __update_cache(unsigned long address, pte_t pte); | |
274 | ||
275 | if (!pte_present(pteval)) | |
276 | goto cache_sync_done; | |
277 | ||
278 | if (pte_present(*ptep) && (pte_pfn(*ptep) == pte_pfn(pteval))) | |
279 | goto cache_sync_done; | |
280 | ||
281 | __update_cache(addr, pteval); | |
282 | cache_sync_done: | |
283 | set_pte(ptep, pteval); | |
284 | } | |
285 | ||
1da177e4 | 286 | /* |
c6e8b587 | 287 | * (pmds are folded into puds so this doesn't get actually called, |
1da177e4 LT |
288 | * but the define is needed for a generic inline function.) |
289 | */ | |
290 | #define set_pmd(pmdptr, pmdval) do { *(pmdptr) = (pmdval); } while(0) | |
c6e8b587 | 291 | |
325f8a0a | 292 | #ifndef __PAGETABLE_PMD_FOLDED |
c6e8b587 RB |
293 | /* |
294 | * (puds are folded into pgds so this doesn't get actually called, | |
295 | * but the define is needed for a generic inline function.) | |
296 | */ | |
297 | #define set_pud(pudptr, pudval) do { *(pudptr) = (pudval); } while(0) | |
298 | #endif | |
1da177e4 | 299 | |
5ff97472 RB |
300 | #define PGD_T_LOG2 (__builtin_ffs(sizeof(pgd_t)) - 1) |
301 | #define PMD_T_LOG2 (__builtin_ffs(sizeof(pmd_t)) - 1) | |
302 | #define PTE_T_LOG2 (__builtin_ffs(sizeof(pte_t)) - 1) | |
1da177e4 | 303 | |
9975e77d RB |
304 | /* |
305 | * We used to declare this array with size but gcc 3.3 and older are not able | |
306 | * to find that this expression is a constant, so the size is dropped. | |
307 | */ | |
308 | extern pgd_t swapper_pg_dir[]; | |
1da177e4 LT |
309 | |
310 | /* | |
311 | * The following only work if pte_present() is true. | |
312 | * Undefined behaviour if not.. | |
313 | */ | |
34adb28d | 314 | #if defined(CONFIG_PHYS_ADDR_T_64BIT) && defined(CONFIG_CPU_MIPS32) |
6e953891 SS |
315 | static inline int pte_write(pte_t pte) { return pte.pte_low & _PAGE_WRITE; } |
316 | static inline int pte_dirty(pte_t pte) { return pte.pte_low & _PAGE_MODIFIED; } | |
317 | static inline int pte_young(pte_t pte) { return pte.pte_low & _PAGE_ACCESSED; } | |
6e953891 | 318 | |
1da177e4 LT |
319 | static inline pte_t pte_wrprotect(pte_t pte) |
320 | { | |
c5b36783 | 321 | pte.pte_low &= ~_PAGE_WRITE; |
97f2645f | 322 | if (!IS_ENABLED(CONFIG_XPA)) |
7b2cb64f | 323 | pte.pte_low &= ~_PAGE_SILENT_WRITE; |
6e953891 | 324 | pte.pte_high &= ~_PAGE_SILENT_WRITE; |
1da177e4 LT |
325 | return pte; |
326 | } | |
327 | ||
1da177e4 LT |
328 | static inline pte_t pte_mkclean(pte_t pte) |
329 | { | |
c5b36783 | 330 | pte.pte_low &= ~_PAGE_MODIFIED; |
97f2645f | 331 | if (!IS_ENABLED(CONFIG_XPA)) |
7b2cb64f | 332 | pte.pte_low &= ~_PAGE_SILENT_WRITE; |
6e953891 | 333 | pte.pte_high &= ~_PAGE_SILENT_WRITE; |
1da177e4 LT |
334 | return pte; |
335 | } | |
336 | ||
337 | static inline pte_t pte_mkold(pte_t pte) | |
338 | { | |
c5b36783 | 339 | pte.pte_low &= ~_PAGE_ACCESSED; |
97f2645f | 340 | if (!IS_ENABLED(CONFIG_XPA)) |
7b2cb64f | 341 | pte.pte_low &= ~_PAGE_SILENT_READ; |
6e953891 | 342 | pte.pte_high &= ~_PAGE_SILENT_READ; |
1da177e4 LT |
343 | return pte; |
344 | } | |
345 | ||
346 | static inline pte_t pte_mkwrite(pte_t pte) | |
347 | { | |
6e953891 | 348 | pte.pte_low |= _PAGE_WRITE; |
7b2cb64f | 349 | if (pte.pte_low & _PAGE_MODIFIED) { |
97f2645f | 350 | if (!IS_ENABLED(CONFIG_XPA)) |
7b2cb64f | 351 | pte.pte_low |= _PAGE_SILENT_WRITE; |
6e953891 | 352 | pte.pte_high |= _PAGE_SILENT_WRITE; |
7b2cb64f | 353 | } |
1da177e4 LT |
354 | return pte; |
355 | } | |
356 | ||
1da177e4 LT |
357 | static inline pte_t pte_mkdirty(pte_t pte) |
358 | { | |
6e953891 | 359 | pte.pte_low |= _PAGE_MODIFIED; |
7b2cb64f | 360 | if (pte.pte_low & _PAGE_WRITE) { |
97f2645f | 361 | if (!IS_ENABLED(CONFIG_XPA)) |
7b2cb64f | 362 | pte.pte_low |= _PAGE_SILENT_WRITE; |
6e953891 | 363 | pte.pte_high |= _PAGE_SILENT_WRITE; |
7b2cb64f | 364 | } |
1da177e4 LT |
365 | return pte; |
366 | } | |
367 | ||
368 | static inline pte_t pte_mkyoung(pte_t pte) | |
369 | { | |
6e953891 | 370 | pte.pte_low |= _PAGE_ACCESSED; |
7b2cb64f | 371 | if (!(pte.pte_low & _PAGE_NO_READ)) { |
97f2645f | 372 | if (!IS_ENABLED(CONFIG_XPA)) |
7b2cb64f | 373 | pte.pte_low |= _PAGE_SILENT_READ; |
6e953891 | 374 | pte.pte_high |= _PAGE_SILENT_READ; |
7b2cb64f | 375 | } |
1da177e4 LT |
376 | return pte; |
377 | } | |
378 | #else | |
1da177e4 LT |
379 | static inline int pte_write(pte_t pte) { return pte_val(pte) & _PAGE_WRITE; } |
380 | static inline int pte_dirty(pte_t pte) { return pte_val(pte) & _PAGE_MODIFIED; } | |
381 | static inline int pte_young(pte_t pte) { return pte_val(pte) & _PAGE_ACCESSED; } | |
1da177e4 LT |
382 | |
383 | static inline pte_t pte_wrprotect(pte_t pte) | |
384 | { | |
385 | pte_val(pte) &= ~(_PAGE_WRITE | _PAGE_SILENT_WRITE); | |
386 | return pte; | |
387 | } | |
388 | ||
1da177e4 LT |
389 | static inline pte_t pte_mkclean(pte_t pte) |
390 | { | |
77a5c593 | 391 | pte_val(pte) &= ~(_PAGE_MODIFIED | _PAGE_SILENT_WRITE); |
1da177e4 LT |
392 | return pte; |
393 | } | |
394 | ||
395 | static inline pte_t pte_mkold(pte_t pte) | |
396 | { | |
77a5c593 | 397 | pte_val(pte) &= ~(_PAGE_ACCESSED | _PAGE_SILENT_READ); |
1da177e4 LT |
398 | return pte; |
399 | } | |
400 | ||
401 | static inline pte_t pte_mkwrite(pte_t pte) | |
402 | { | |
403 | pte_val(pte) |= _PAGE_WRITE; | |
404 | if (pte_val(pte) & _PAGE_MODIFIED) | |
405 | pte_val(pte) |= _PAGE_SILENT_WRITE; | |
406 | return pte; | |
407 | } | |
408 | ||
1da177e4 LT |
409 | static inline pte_t pte_mkdirty(pte_t pte) |
410 | { | |
411 | pte_val(pte) |= _PAGE_MODIFIED; | |
412 | if (pte_val(pte) & _PAGE_WRITE) | |
413 | pte_val(pte) |= _PAGE_SILENT_WRITE; | |
414 | return pte; | |
415 | } | |
416 | ||
417 | static inline pte_t pte_mkyoung(pte_t pte) | |
418 | { | |
419 | pte_val(pte) |= _PAGE_ACCESSED; | |
be0c37c9 SH |
420 | if (!(pte_val(pte) & _PAGE_NO_READ)) |
421 | pte_val(pte) |= _PAGE_SILENT_READ; | |
1da177e4 LT |
422 | return pte; |
423 | } | |
dd794392 | 424 | |
05f9883a | 425 | #ifdef CONFIG_MIPS_HUGE_TLB_SUPPORT |
dd794392 DD |
426 | static inline int pte_huge(pte_t pte) { return pte_val(pte) & _PAGE_HUGE; } |
427 | ||
428 | static inline pte_t pte_mkhuge(pte_t pte) | |
429 | { | |
430 | pte_val(pte) |= _PAGE_HUGE; | |
431 | return pte; | |
432 | } | |
05f9883a | 433 | #endif /* CONFIG_MIPS_HUGE_TLB_SUPPORT */ |
1da177e4 | 434 | #endif |
7e675137 NP |
435 | static inline int pte_special(pte_t pte) { return 0; } |
436 | static inline pte_t pte_mkspecial(pte_t pte) { return pte; } | |
1da177e4 LT |
437 | |
438 | /* | |
70342287 | 439 | * Macro to make mark a page protection value as "uncacheable". Note |
1da177e4 LT |
440 | * that "protection" is really a misnomer here as the protection value |
441 | * contains the memory attribute bits, dirty bits, and various other | |
442 | * bits as well. | |
443 | */ | |
444 | #define pgprot_noncached pgprot_noncached | |
445 | ||
446 | static inline pgprot_t pgprot_noncached(pgprot_t _prot) | |
447 | { | |
448 | unsigned long prot = pgprot_val(_prot); | |
449 | ||
450 | prot = (prot & ~_CACHE_MASK) | _CACHE_UNCACHED; | |
451 | ||
452 | return __pgprot(prot); | |
453 | } | |
454 | ||
c4687b15 AS |
455 | #define pgprot_writecombine pgprot_writecombine |
456 | ||
4b050ba7 MC |
457 | static inline pgprot_t pgprot_writecombine(pgprot_t _prot) |
458 | { | |
459 | unsigned long prot = pgprot_val(_prot); | |
460 | ||
461 | /* cpu_data[0].writecombine is already shifted by _CACHE_SHIFT */ | |
462 | prot = (prot & ~_CACHE_MASK) | cpu_data[0].writecombine; | |
463 | ||
464 | return __pgprot(prot); | |
465 | } | |
466 | ||
1da177e4 LT |
467 | /* |
468 | * Conversion functions: convert a page and protection to a page entry, | |
469 | * and a page entry and page directory to the page they refer to. | |
470 | */ | |
471 | #define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot)) | |
472 | ||
7b2cb64f | 473 | #if defined(CONFIG_XPA) |
1da177e4 LT |
474 | static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) |
475 | { | |
c5b36783 | 476 | pte.pte_low &= (_PAGE_MODIFIED | _PAGE_ACCESSED | _PFNX_MASK); |
77a5c593 | 477 | pte.pte_high &= (_PFN_MASK | _CACHE_MASK); |
c5b36783 | 478 | pte.pte_low |= pgprot_val(newprot) & ~_PFNX_MASK; |
6d037de9 | 479 | pte.pte_high |= pgprot_val(newprot) & ~(_PFN_MASK | _CACHE_MASK); |
1da177e4 LT |
480 | return pte; |
481 | } | |
7b2cb64f PB |
482 | #elif defined(CONFIG_PHYS_ADDR_T_64BIT) && defined(CONFIG_CPU_MIPS32) |
483 | static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) | |
484 | { | |
485 | pte.pte_low &= _PAGE_CHG_MASK; | |
486 | pte.pte_high &= (_PFN_MASK | _CACHE_MASK); | |
487 | pte.pte_low |= pgprot_val(newprot); | |
488 | pte.pte_high |= pgprot_val(newprot) & ~(_PFN_MASK | _CACHE_MASK); | |
489 | return pte; | |
490 | } | |
1da177e4 LT |
491 | #else |
492 | static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) | |
493 | { | |
6d037de9 RB |
494 | return __pte((pte_val(pte) & _PAGE_CHG_MASK) | |
495 | (pgprot_val(newprot) & ~_PAGE_CHG_MASK)); | |
1da177e4 LT |
496 | } |
497 | #endif | |
498 | ||
499 | ||
500 | extern void __update_tlb(struct vm_area_struct *vma, unsigned long address, | |
501 | pte_t pte); | |
1da177e4 LT |
502 | |
503 | static inline void update_mmu_cache(struct vm_area_struct *vma, | |
4b3073e1 | 504 | unsigned long address, pte_t *ptep) |
1da177e4 | 505 | { |
4b3073e1 | 506 | pte_t pte = *ptep; |
1da177e4 | 507 | __update_tlb(vma, address, pte); |
1da177e4 LT |
508 | } |
509 | ||
970d032f RB |
510 | static inline void update_mmu_cache_pmd(struct vm_area_struct *vma, |
511 | unsigned long address, pmd_t *pmdp) | |
512 | { | |
513 | pte_t pte = *(pte_t *)pmdp; | |
514 | ||
515 | __update_tlb(vma, address, pte); | |
516 | } | |
517 | ||
1da177e4 | 518 | #define kern_addr_valid(addr) (1) |
1da177e4 | 519 | |
34adb28d | 520 | #ifdef CONFIG_PHYS_ADDR_T_64BIT |
1da177e4 LT |
521 | extern int remap_pfn_range(struct vm_area_struct *vma, unsigned long from, unsigned long pfn, unsigned long size, pgprot_t prot); |
522 | ||
1da177e4 LT |
523 | static inline int io_remap_pfn_range(struct vm_area_struct *vma, |
524 | unsigned long vaddr, | |
525 | unsigned long pfn, | |
526 | unsigned long size, | |
527 | pgprot_t prot) | |
528 | { | |
15d45cce | 529 | phys_addr_t phys_addr_high = fixup_bigphys_addr(pfn << PAGE_SHIFT, size); |
ac5d8c02 | 530 | return remap_pfn_range(vma, vaddr, phys_addr_high >> PAGE_SHIFT, size, prot); |
1da177e4 | 531 | } |
40d158e6 | 532 | #define io_remap_pfn_range io_remap_pfn_range |
1da177e4 LT |
533 | #endif |
534 | ||
970d032f RB |
535 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
536 | ||
b6b34b2d KS |
537 | /* We don't have hardware dirty/accessed bits, generic_pmdp_establish is fine.*/ |
538 | #define pmdp_establish generic_pmdp_establish | |
539 | ||
fd8cfd30 | 540 | #define has_transparent_hugepage has_transparent_hugepage |
970d032f RB |
541 | extern int has_transparent_hugepage(void); |
542 | ||
543 | static inline int pmd_trans_huge(pmd_t pmd) | |
544 | { | |
545 | return !!(pmd_val(pmd) & _PAGE_HUGE); | |
546 | } | |
547 | ||
548 | static inline pmd_t pmd_mkhuge(pmd_t pmd) | |
549 | { | |
550 | pmd_val(pmd) |= _PAGE_HUGE; | |
551 | ||
552 | return pmd; | |
553 | } | |
554 | ||
970d032f RB |
555 | extern void set_pmd_at(struct mm_struct *mm, unsigned long addr, |
556 | pmd_t *pmdp, pmd_t pmd); | |
557 | ||
e4e40e02 | 558 | #define pmd_write pmd_write |
970d032f RB |
559 | static inline int pmd_write(pmd_t pmd) |
560 | { | |
561 | return !!(pmd_val(pmd) & _PAGE_WRITE); | |
562 | } | |
563 | ||
564 | static inline pmd_t pmd_wrprotect(pmd_t pmd) | |
565 | { | |
566 | pmd_val(pmd) &= ~(_PAGE_WRITE | _PAGE_SILENT_WRITE); | |
567 | return pmd; | |
568 | } | |
569 | ||
570 | static inline pmd_t pmd_mkwrite(pmd_t pmd) | |
571 | { | |
572 | pmd_val(pmd) |= _PAGE_WRITE; | |
573 | if (pmd_val(pmd) & _PAGE_MODIFIED) | |
574 | pmd_val(pmd) |= _PAGE_SILENT_WRITE; | |
575 | ||
576 | return pmd; | |
577 | } | |
578 | ||
579 | static inline int pmd_dirty(pmd_t pmd) | |
580 | { | |
581 | return !!(pmd_val(pmd) & _PAGE_MODIFIED); | |
582 | } | |
583 | ||
584 | static inline pmd_t pmd_mkclean(pmd_t pmd) | |
585 | { | |
586 | pmd_val(pmd) &= ~(_PAGE_MODIFIED | _PAGE_SILENT_WRITE); | |
587 | return pmd; | |
588 | } | |
589 | ||
590 | static inline pmd_t pmd_mkdirty(pmd_t pmd) | |
591 | { | |
592 | pmd_val(pmd) |= _PAGE_MODIFIED; | |
593 | if (pmd_val(pmd) & _PAGE_WRITE) | |
594 | pmd_val(pmd) |= _PAGE_SILENT_WRITE; | |
595 | ||
596 | return pmd; | |
597 | } | |
598 | ||
599 | static inline int pmd_young(pmd_t pmd) | |
600 | { | |
601 | return !!(pmd_val(pmd) & _PAGE_ACCESSED); | |
602 | } | |
603 | ||
604 | static inline pmd_t pmd_mkold(pmd_t pmd) | |
605 | { | |
606 | pmd_val(pmd) &= ~(_PAGE_ACCESSED|_PAGE_SILENT_READ); | |
607 | ||
608 | return pmd; | |
609 | } | |
610 | ||
611 | static inline pmd_t pmd_mkyoung(pmd_t pmd) | |
612 | { | |
613 | pmd_val(pmd) |= _PAGE_ACCESSED; | |
614 | ||
be0c37c9 SH |
615 | if (!(pmd_val(pmd) & _PAGE_NO_READ)) |
616 | pmd_val(pmd) |= _PAGE_SILENT_READ; | |
970d032f RB |
617 | |
618 | return pmd; | |
619 | } | |
620 | ||
621 | /* Extern to avoid header file madness */ | |
622 | extern pmd_t mk_pmd(struct page *page, pgprot_t prot); | |
623 | ||
624 | static inline unsigned long pmd_pfn(pmd_t pmd) | |
625 | { | |
626 | return pmd_val(pmd) >> _PFN_SHIFT; | |
627 | } | |
628 | ||
629 | static inline struct page *pmd_page(pmd_t pmd) | |
630 | { | |
631 | if (pmd_trans_huge(pmd)) | |
632 | return pfn_to_page(pmd_pfn(pmd)); | |
633 | ||
634 | return pfn_to_page(pmd_phys(pmd) >> PAGE_SHIFT); | |
635 | } | |
636 | ||
637 | static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot) | |
638 | { | |
88d02a2b | 639 | pmd_val(pmd) = (pmd_val(pmd) & (_PAGE_CHG_MASK | _PAGE_HUGE)) | |
6d037de9 | 640 | (pgprot_val(newprot) & ~_PAGE_CHG_MASK); |
970d032f RB |
641 | return pmd; |
642 | } | |
643 | ||
644 | static inline pmd_t pmd_mknotpresent(pmd_t pmd) | |
645 | { | |
646 | pmd_val(pmd) &= ~(_PAGE_PRESENT | _PAGE_VALID | _PAGE_DIRTY); | |
647 | ||
648 | return pmd; | |
649 | } | |
650 | ||
651 | /* | |
8809aa2d | 652 | * The generic version pmdp_huge_get_and_clear uses a version of pmd_clear() with a |
970d032f RB |
653 | * different prototype. |
654 | */ | |
8809aa2d AK |
655 | #define __HAVE_ARCH_PMDP_HUGE_GET_AND_CLEAR |
656 | static inline pmd_t pmdp_huge_get_and_clear(struct mm_struct *mm, | |
657 | unsigned long address, pmd_t *pmdp) | |
970d032f RB |
658 | { |
659 | pmd_t old = *pmdp; | |
660 | ||
661 | pmd_clear(pmdp); | |
662 | ||
663 | return old; | |
664 | } | |
665 | ||
666 | #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ | |
667 | ||
1da177e4 LT |
668 | #include <asm-generic/pgtable.h> |
669 | ||
22f1fdfd WZ |
670 | /* |
671 | * uncached accelerated TLB map for video memory access | |
672 | */ | |
673 | #ifdef CONFIG_CPU_SUPPORTS_UNCACHED_ACCELERATED | |
674 | #define __HAVE_PHYS_MEM_ACCESS_PROT | |
675 | ||
676 | struct file; | |
677 | pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn, | |
678 | unsigned long size, pgprot_t vma_prot); | |
22f1fdfd WZ |
679 | #endif |
680 | ||
1da177e4 LT |
681 | /* |
682 | * We provide our own get_unmapped area to cope with the virtual aliasing | |
683 | * constraints placed on us by the cache architecture. | |
684 | */ | |
685 | #define HAVE_ARCH_UNMAPPED_AREA | |
d0be89f6 | 686 | #define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN |
1da177e4 LT |
687 | |
688 | /* | |
689 | * No page table caches to initialise | |
690 | */ | |
691 | #define pgtable_cache_init() do { } while (0) | |
692 | ||
693 | #endif /* _ASM_PGTABLE_H */ |