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 | ||
875d43e7 | 11 | #ifdef CONFIG_32BIT |
1da177e4 LT |
12 | #include <asm/pgtable-32.h> |
13 | #endif | |
875d43e7 | 14 | #ifdef CONFIG_64BIT |
1da177e4 LT |
15 | #include <asm/pgtable-64.h> |
16 | #endif | |
17 | ||
f10fae02 | 18 | #include <asm/io.h> |
1da177e4 LT |
19 | #include <asm/pgtable-bits.h> |
20 | ||
8c65b4a6 TS |
21 | struct mm_struct; |
22 | struct vm_area_struct; | |
23 | ||
1da177e4 LT |
24 | #define PAGE_NONE __pgprot(_PAGE_PRESENT | _CACHE_CACHABLE_NONCOHERENT) |
25 | #define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_READ | _PAGE_WRITE | \ | |
26 | PAGE_CACHABLE_DEFAULT) | |
27 | #define PAGE_COPY __pgprot(_PAGE_PRESENT | _PAGE_READ | \ | |
28 | PAGE_CACHABLE_DEFAULT) | |
29 | #define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_READ | \ | |
30 | PAGE_CACHABLE_DEFAULT) | |
31 | #define PAGE_KERNEL __pgprot(_PAGE_PRESENT | __READABLE | __WRITEABLE | \ | |
32 | _PAGE_GLOBAL | PAGE_CACHABLE_DEFAULT) | |
33 | #define PAGE_USERIO __pgprot(_PAGE_PRESENT | _PAGE_READ | _PAGE_WRITE | \ | |
34 | PAGE_CACHABLE_DEFAULT) | |
35 | #define PAGE_KERNEL_UNCACHED __pgprot(_PAGE_PRESENT | __READABLE | \ | |
36 | __WRITEABLE | _PAGE_GLOBAL | _CACHE_UNCACHED) | |
37 | ||
38 | /* | |
39 | * MIPS can't do page protection for execute, and considers that the same like | |
40 | * read. Also, write permissions imply read permissions. This is the closest | |
41 | * we can get by reasonable means.. | |
42 | */ | |
43 | #define __P000 PAGE_NONE | |
44 | #define __P001 PAGE_READONLY | |
45 | #define __P010 PAGE_COPY | |
46 | #define __P011 PAGE_COPY | |
47 | #define __P100 PAGE_READONLY | |
48 | #define __P101 PAGE_READONLY | |
49 | #define __P110 PAGE_COPY | |
50 | #define __P111 PAGE_COPY | |
51 | ||
52 | #define __S000 PAGE_NONE | |
53 | #define __S001 PAGE_READONLY | |
54 | #define __S010 PAGE_SHARED | |
55 | #define __S011 PAGE_SHARED | |
56 | #define __S100 PAGE_READONLY | |
57 | #define __S101 PAGE_READONLY | |
58 | #define __S110 PAGE_SHARED | |
59 | #define __S111 PAGE_SHARED | |
60 | ||
61 | /* | |
62 | * ZERO_PAGE is a global shared page that is always zero; used | |
63 | * for zero-mapped memory areas etc.. | |
64 | */ | |
65 | ||
66 | extern unsigned long empty_zero_page; | |
67 | extern unsigned long zero_page_mask; | |
68 | ||
69 | #define ZERO_PAGE(vaddr) \ | |
99e3b942 | 70 | (virt_to_page((void *)(empty_zero_page + (((unsigned long)(vaddr)) & zero_page_mask)))) |
1da177e4 LT |
71 | |
72 | extern void paging_init(void); | |
73 | ||
74 | /* | |
75 | * Conversion functions: convert a page and protection to a page entry, | |
76 | * and a page entry and page directory to the page they refer to. | |
77 | */ | |
c9d06962 | 78 | #define pmd_phys(pmd) virt_to_phys((void *)pmd_val(pmd)) |
1da177e4 | 79 | #define pmd_page(pmd) (pfn_to_page(pmd_phys(pmd) >> PAGE_SHIFT)) |
46a82b2d | 80 | #define pmd_page_vaddr(pmd) pmd_val(pmd) |
1da177e4 | 81 | |
6e760c8d | 82 | #if defined(CONFIG_64BIT_PHYS_ADDR) && defined(CONFIG_CPU_MIPS32_R1) |
6e953891 SS |
83 | |
84 | #define pte_none(pte) (!(((pte).pte_low | (pte).pte_high) & ~_PAGE_GLOBAL)) | |
85 | #define pte_present(pte) ((pte).pte_low & _PAGE_PRESENT) | |
86 | ||
1da177e4 LT |
87 | static inline void set_pte(pte_t *ptep, pte_t pte) |
88 | { | |
89 | ptep->pte_high = pte.pte_high; | |
90 | smp_wmb(); | |
91 | ptep->pte_low = pte.pte_low; | |
92 | //printk("pte_high %x pte_low %x\n", ptep->pte_high, ptep->pte_low); | |
93 | ||
6e953891 | 94 | if (pte.pte_low & _PAGE_GLOBAL) { |
1da177e4 LT |
95 | pte_t *buddy = ptep_buddy(ptep); |
96 | /* | |
97 | * Make sure the buddy is global too (if it's !none, | |
98 | * it better already be global) | |
99 | */ | |
6e953891 SS |
100 | if (pte_none(*buddy)) { |
101 | buddy->pte_low |= _PAGE_GLOBAL; | |
102 | buddy->pte_high |= _PAGE_GLOBAL; | |
103 | } | |
1da177e4 LT |
104 | } |
105 | } | |
106 | #define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval) | |
107 | ||
108 | static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep) | |
109 | { | |
6e953891 SS |
110 | pte_t null = __pte(0); |
111 | ||
1da177e4 | 112 | /* Preserve global status for the pair */ |
6e953891 SS |
113 | if (ptep_buddy(ptep)->pte_low & _PAGE_GLOBAL) |
114 | null.pte_low = null.pte_high = _PAGE_GLOBAL; | |
115 | ||
116 | set_pte_at(mm, addr, ptep, null); | |
1da177e4 LT |
117 | } |
118 | #else | |
6e953891 SS |
119 | |
120 | #define pte_none(pte) (!(pte_val(pte) & ~_PAGE_GLOBAL)) | |
121 | #define pte_present(pte) (pte_val(pte) & _PAGE_PRESENT) | |
122 | ||
1da177e4 LT |
123 | /* |
124 | * Certain architectures need to do special things when pte's | |
125 | * within a page table are directly modified. Thus, the following | |
126 | * hook is made available. | |
127 | */ | |
128 | static inline void set_pte(pte_t *ptep, pte_t pteval) | |
129 | { | |
130 | *ptep = pteval; | |
131 | #if !defined(CONFIG_CPU_R3000) && !defined(CONFIG_CPU_TX39XX) | |
132 | if (pte_val(pteval) & _PAGE_GLOBAL) { | |
133 | pte_t *buddy = ptep_buddy(ptep); | |
134 | /* | |
135 | * Make sure the buddy is global too (if it's !none, | |
136 | * it better already be global) | |
137 | */ | |
138 | if (pte_none(*buddy)) | |
139 | pte_val(*buddy) = pte_val(*buddy) | _PAGE_GLOBAL; | |
140 | } | |
141 | #endif | |
142 | } | |
143 | #define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval) | |
144 | ||
145 | static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep) | |
146 | { | |
147 | #if !defined(CONFIG_CPU_R3000) && !defined(CONFIG_CPU_TX39XX) | |
148 | /* Preserve global status for the pair */ | |
149 | if (pte_val(*ptep_buddy(ptep)) & _PAGE_GLOBAL) | |
150 | set_pte_at(mm, addr, ptep, __pte(_PAGE_GLOBAL)); | |
151 | else | |
152 | #endif | |
153 | set_pte_at(mm, addr, ptep, __pte(0)); | |
154 | } | |
155 | #endif | |
156 | ||
157 | /* | |
c6e8b587 | 158 | * (pmds are folded into puds so this doesn't get actually called, |
1da177e4 LT |
159 | * but the define is needed for a generic inline function.) |
160 | */ | |
161 | #define set_pmd(pmdptr, pmdval) do { *(pmdptr) = (pmdval); } while(0) | |
c6e8b587 RB |
162 | |
163 | #ifdef CONFIG_64BIT | |
164 | /* | |
165 | * (puds are folded into pgds so this doesn't get actually called, | |
166 | * but the define is needed for a generic inline function.) | |
167 | */ | |
168 | #define set_pud(pudptr, pudval) do { *(pudptr) = (pudval); } while(0) | |
169 | #endif | |
1da177e4 LT |
170 | |
171 | #define PGD_T_LOG2 ffz(~sizeof(pgd_t)) | |
172 | #define PMD_T_LOG2 ffz(~sizeof(pmd_t)) | |
173 | #define PTE_T_LOG2 ffz(~sizeof(pte_t)) | |
174 | ||
175 | extern pgd_t swapper_pg_dir[PTRS_PER_PGD]; | |
176 | ||
177 | /* | |
178 | * The following only work if pte_present() is true. | |
179 | * Undefined behaviour if not.. | |
180 | */ | |
181 | static inline int pte_user(pte_t pte) { BUG(); return 0; } | |
6e760c8d | 182 | #if defined(CONFIG_64BIT_PHYS_ADDR) && defined(CONFIG_CPU_MIPS32_R1) |
6e953891 SS |
183 | static inline int pte_read(pte_t pte) { return pte.pte_low & _PAGE_READ; } |
184 | static inline int pte_write(pte_t pte) { return pte.pte_low & _PAGE_WRITE; } | |
185 | static inline int pte_dirty(pte_t pte) { return pte.pte_low & _PAGE_MODIFIED; } | |
186 | static inline int pte_young(pte_t pte) { return pte.pte_low & _PAGE_ACCESSED; } | |
187 | static inline int pte_file(pte_t pte) { return pte.pte_low & _PAGE_FILE; } | |
188 | ||
1da177e4 LT |
189 | static inline pte_t pte_wrprotect(pte_t pte) |
190 | { | |
6e953891 SS |
191 | pte.pte_low &= ~(_PAGE_WRITE | _PAGE_SILENT_WRITE); |
192 | pte.pte_high &= ~_PAGE_SILENT_WRITE; | |
1da177e4 LT |
193 | return pte; |
194 | } | |
195 | ||
196 | static inline pte_t pte_rdprotect(pte_t pte) | |
197 | { | |
6e953891 SS |
198 | pte.pte_low &= ~(_PAGE_READ | _PAGE_SILENT_READ); |
199 | pte.pte_high &= ~_PAGE_SILENT_READ; | |
1da177e4 LT |
200 | return pte; |
201 | } | |
202 | ||
203 | static inline pte_t pte_mkclean(pte_t pte) | |
204 | { | |
6e953891 SS |
205 | pte.pte_low &= ~(_PAGE_MODIFIED | _PAGE_SILENT_WRITE); |
206 | pte.pte_high &= ~_PAGE_SILENT_WRITE; | |
1da177e4 LT |
207 | return pte; |
208 | } | |
209 | ||
210 | static inline pte_t pte_mkold(pte_t pte) | |
211 | { | |
6e953891 SS |
212 | pte.pte_low &= ~(_PAGE_ACCESSED | _PAGE_SILENT_READ); |
213 | pte.pte_high &= ~_PAGE_SILENT_READ; | |
1da177e4 LT |
214 | return pte; |
215 | } | |
216 | ||
217 | static inline pte_t pte_mkwrite(pte_t pte) | |
218 | { | |
6e953891 SS |
219 | pte.pte_low |= _PAGE_WRITE; |
220 | if (pte.pte_low & _PAGE_MODIFIED) { | |
221 | pte.pte_low |= _PAGE_SILENT_WRITE; | |
222 | pte.pte_high |= _PAGE_SILENT_WRITE; | |
1da177e4 LT |
223 | } |
224 | return pte; | |
225 | } | |
226 | ||
227 | static inline pte_t pte_mkread(pte_t pte) | |
228 | { | |
6e953891 SS |
229 | pte.pte_low |= _PAGE_READ; |
230 | if (pte.pte_low & _PAGE_ACCESSED) { | |
231 | pte.pte_low |= _PAGE_SILENT_READ; | |
232 | pte.pte_high |= _PAGE_SILENT_READ; | |
1da177e4 LT |
233 | } |
234 | return pte; | |
235 | } | |
236 | ||
237 | static inline pte_t pte_mkdirty(pte_t pte) | |
238 | { | |
6e953891 SS |
239 | pte.pte_low |= _PAGE_MODIFIED; |
240 | if (pte.pte_low & _PAGE_WRITE) { | |
241 | pte.pte_low |= _PAGE_SILENT_WRITE; | |
242 | pte.pte_high |= _PAGE_SILENT_WRITE; | |
1da177e4 LT |
243 | } |
244 | return pte; | |
245 | } | |
246 | ||
247 | static inline pte_t pte_mkyoung(pte_t pte) | |
248 | { | |
6e953891 SS |
249 | pte.pte_low |= _PAGE_ACCESSED; |
250 | if (pte.pte_low & _PAGE_READ) | |
251 | pte.pte_low |= _PAGE_SILENT_READ; | |
252 | pte.pte_high |= _PAGE_SILENT_READ; | |
1da177e4 LT |
253 | return pte; |
254 | } | |
255 | #else | |
256 | static inline int pte_read(pte_t pte) { return pte_val(pte) & _PAGE_READ; } | |
257 | static inline int pte_write(pte_t pte) { return pte_val(pte) & _PAGE_WRITE; } | |
258 | static inline int pte_dirty(pte_t pte) { return pte_val(pte) & _PAGE_MODIFIED; } | |
259 | static inline int pte_young(pte_t pte) { return pte_val(pte) & _PAGE_ACCESSED; } | |
260 | static inline int pte_file(pte_t pte) { return pte_val(pte) & _PAGE_FILE; } | |
261 | ||
262 | static inline pte_t pte_wrprotect(pte_t pte) | |
263 | { | |
264 | pte_val(pte) &= ~(_PAGE_WRITE | _PAGE_SILENT_WRITE); | |
265 | return pte; | |
266 | } | |
267 | ||
268 | static inline pte_t pte_rdprotect(pte_t pte) | |
269 | { | |
270 | pte_val(pte) &= ~(_PAGE_READ | _PAGE_SILENT_READ); | |
271 | return pte; | |
272 | } | |
273 | ||
274 | static inline pte_t pte_mkclean(pte_t pte) | |
275 | { | |
276 | pte_val(pte) &= ~(_PAGE_MODIFIED|_PAGE_SILENT_WRITE); | |
277 | return pte; | |
278 | } | |
279 | ||
280 | static inline pte_t pte_mkold(pte_t pte) | |
281 | { | |
282 | pte_val(pte) &= ~(_PAGE_ACCESSED|_PAGE_SILENT_READ); | |
283 | return pte; | |
284 | } | |
285 | ||
286 | static inline pte_t pte_mkwrite(pte_t pte) | |
287 | { | |
288 | pte_val(pte) |= _PAGE_WRITE; | |
289 | if (pte_val(pte) & _PAGE_MODIFIED) | |
290 | pte_val(pte) |= _PAGE_SILENT_WRITE; | |
291 | return pte; | |
292 | } | |
293 | ||
294 | static inline pte_t pte_mkread(pte_t pte) | |
295 | { | |
296 | pte_val(pte) |= _PAGE_READ; | |
297 | if (pte_val(pte) & _PAGE_ACCESSED) | |
298 | pte_val(pte) |= _PAGE_SILENT_READ; | |
299 | return pte; | |
300 | } | |
301 | ||
302 | static inline pte_t pte_mkdirty(pte_t pte) | |
303 | { | |
304 | pte_val(pte) |= _PAGE_MODIFIED; | |
305 | if (pte_val(pte) & _PAGE_WRITE) | |
306 | pte_val(pte) |= _PAGE_SILENT_WRITE; | |
307 | return pte; | |
308 | } | |
309 | ||
310 | static inline pte_t pte_mkyoung(pte_t pte) | |
311 | { | |
312 | pte_val(pte) |= _PAGE_ACCESSED; | |
313 | if (pte_val(pte) & _PAGE_READ) | |
314 | pte_val(pte) |= _PAGE_SILENT_READ; | |
315 | return pte; | |
316 | } | |
317 | #endif | |
318 | ||
319 | /* | |
320 | * Macro to make mark a page protection value as "uncacheable". Note | |
321 | * that "protection" is really a misnomer here as the protection value | |
322 | * contains the memory attribute bits, dirty bits, and various other | |
323 | * bits as well. | |
324 | */ | |
325 | #define pgprot_noncached pgprot_noncached | |
326 | ||
327 | static inline pgprot_t pgprot_noncached(pgprot_t _prot) | |
328 | { | |
329 | unsigned long prot = pgprot_val(_prot); | |
330 | ||
331 | prot = (prot & ~_CACHE_MASK) | _CACHE_UNCACHED; | |
332 | ||
333 | return __pgprot(prot); | |
334 | } | |
335 | ||
336 | /* | |
337 | * Conversion functions: convert a page and protection to a page entry, | |
338 | * and a page entry and page directory to the page they refer to. | |
339 | */ | |
340 | #define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot)) | |
341 | ||
6e760c8d | 342 | #if defined(CONFIG_64BIT_PHYS_ADDR) && defined(CONFIG_CPU_MIPS32_R1) |
1da177e4 LT |
343 | static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) |
344 | { | |
79e0bc37 SS |
345 | pte.pte_low &= _PAGE_CHG_MASK; |
346 | pte.pte_high &= ~0x3f; | |
347 | pte.pte_low |= pgprot_val(newprot); | |
1da177e4 LT |
348 | pte.pte_high |= pgprot_val(newprot) & 0x3f; |
349 | return pte; | |
350 | } | |
351 | #else | |
352 | static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) | |
353 | { | |
354 | return __pte((pte_val(pte) & _PAGE_CHG_MASK) | pgprot_val(newprot)); | |
355 | } | |
356 | #endif | |
357 | ||
358 | ||
359 | extern void __update_tlb(struct vm_area_struct *vma, unsigned long address, | |
360 | pte_t pte); | |
361 | extern void __update_cache(struct vm_area_struct *vma, unsigned long address, | |
362 | pte_t pte); | |
363 | ||
364 | static inline void update_mmu_cache(struct vm_area_struct *vma, | |
365 | unsigned long address, pte_t pte) | |
366 | { | |
367 | __update_tlb(vma, address, pte); | |
368 | __update_cache(vma, address, pte); | |
369 | } | |
370 | ||
1da177e4 | 371 | #define kern_addr_valid(addr) (1) |
1da177e4 LT |
372 | |
373 | #ifdef CONFIG_64BIT_PHYS_ADDR | |
1da177e4 LT |
374 | extern int remap_pfn_range(struct vm_area_struct *vma, unsigned long from, unsigned long pfn, unsigned long size, pgprot_t prot); |
375 | ||
1da177e4 LT |
376 | static inline int io_remap_pfn_range(struct vm_area_struct *vma, |
377 | unsigned long vaddr, | |
378 | unsigned long pfn, | |
379 | unsigned long size, | |
380 | pgprot_t prot) | |
381 | { | |
382 | phys_t phys_addr_high = fixup_bigphys_addr(pfn << PAGE_SHIFT, size); | |
ac5d8c02 | 383 | return remap_pfn_range(vma, vaddr, phys_addr_high >> PAGE_SHIFT, size, prot); |
1da177e4 LT |
384 | } |
385 | #else | |
1da177e4 LT |
386 | #define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \ |
387 | remap_pfn_range(vma, vaddr, pfn, size, prot) | |
388 | #endif | |
389 | ||
1da177e4 LT |
390 | #include <asm-generic/pgtable.h> |
391 | ||
392 | /* | |
393 | * We provide our own get_unmapped area to cope with the virtual aliasing | |
394 | * constraints placed on us by the cache architecture. | |
395 | */ | |
396 | #define HAVE_ARCH_UNMAPPED_AREA | |
397 | ||
398 | /* | |
399 | * No page table caches to initialise | |
400 | */ | |
401 | #define pgtable_cache_init() do { } while (0) | |
402 | ||
403 | #endif /* _ASM_PGTABLE_H */ |