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8#ifndef _ASM_PGTABLE_H
9#define _ASM_PGTABLE_H
10
11#ifdef CONFIG_32BIT
12#include <asm/pgtable-32.h>
13#endif
14#ifdef CONFIG_64BIT
15#include <asm/pgtable-64.h>
16#endif
17
18#include <asm/io.h>
19#include <asm/pgtable-bits.h>
20
21struct mm_struct;
22struct vm_area_struct;
23
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
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45
46
47
48#define __P000 __pgprot(0)
49#define __P001 __pgprot(0)
50#define __P010 __pgprot(0)
51#define __P011 __pgprot(0)
52#define __P100 __pgprot(0)
53#define __P101 __pgprot(0)
54#define __P110 __pgprot(0)
55#define __P111 __pgprot(0)
56
57#define __S000 __pgprot(0)
58#define __S001 __pgprot(0)
59#define __S010 __pgprot(0)
60#define __S011 __pgprot(0)
61#define __S100 __pgprot(0)
62#define __S101 __pgprot(0)
63#define __S110 __pgprot(0)
64#define __S111 __pgprot(0)
65
66extern unsigned long _page_cachable_default;
67
68
69
70
71
72
73extern unsigned long empty_zero_page;
74extern unsigned long zero_page_mask;
75
76#define ZERO_PAGE(vaddr) \
77 (virt_to_page((void *)(empty_zero_page + (((unsigned long)(vaddr)) & zero_page_mask))))
78
79#define is_zero_pfn is_zero_pfn
80static inline int is_zero_pfn(unsigned long pfn)
81{
82 extern unsigned long zero_pfn;
83 unsigned long offset_from_zero_pfn = pfn - zero_pfn;
84 return offset_from_zero_pfn <= (zero_page_mask >> PAGE_SHIFT);
85}
86
87#define my_zero_pfn(addr) page_to_pfn(ZERO_PAGE(addr))
88
89extern void paging_init(void);
90
91
92
93
94
95#define pmd_phys(pmd) virt_to_phys((void *)pmd_val(pmd))
96#define pmd_page(pmd) (pfn_to_page(pmd_phys(pmd) >> PAGE_SHIFT))
97#define pmd_page_vaddr(pmd) pmd_val(pmd)
98
99#if defined(CONFIG_64BIT_PHYS_ADDR) && defined(CONFIG_CPU_MIPS32)
100
101#define pte_none(pte) (!(((pte).pte_low | (pte).pte_high) & ~_PAGE_GLOBAL))
102#define pte_present(pte) ((pte).pte_low & _PAGE_PRESENT)
103
104static inline void set_pte(pte_t *ptep, pte_t pte)
105{
106 ptep->pte_high = pte.pte_high;
107 smp_wmb();
108 ptep->pte_low = pte.pte_low;
109
110
111 if (pte.pte_low & _PAGE_GLOBAL) {
112 pte_t *buddy = ptep_buddy(ptep);
113
114
115
116
117 if (pte_none(*buddy)) {
118 buddy->pte_low |= _PAGE_GLOBAL;
119 buddy->pte_high |= _PAGE_GLOBAL;
120 }
121 }
122}
123#define set_pte_at(mm, addr, ptep, pteval) set_pte(ptep, pteval)
124
125static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
126{
127 pte_t null = __pte(0);
128
129
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);
134}
135#else
136
137#define pte_none(pte) (!(pte_val(pte) & ~_PAGE_GLOBAL))
138#define pte_present(pte) (pte_val(pte) & _PAGE_PRESENT)
139
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142
143
144
145static 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
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154
155 if (pte_none(*buddy))
156 pte_val(*buddy) = pte_val(*buddy) | _PAGE_GLOBAL;
157 }
158#endif
159}
160#define set_pte_at(mm, addr, ptep, pteval) set_pte(ptep, pteval)
161
162static 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
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
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176
177
178#define set_pmd(pmdptr, pmdval) do { *(pmdptr) = (pmdval); } while(0)
179
180#ifdef CONFIG_64BIT
181
182
183
184
185#define set_pud(pudptr, pudval) do { *(pudptr) = (pudval); } while(0)
186#endif
187
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)
191
192
193
194
195
196extern pgd_t swapper_pg_dir[];
197
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199
200
201
202#if defined(CONFIG_64BIT_PHYS_ADDR) && defined(CONFIG_CPU_MIPS32)
203static inline int pte_write(pte_t pte) { return pte.pte_low & _PAGE_WRITE; }
204static inline int pte_dirty(pte_t pte) { return pte.pte_low & _PAGE_MODIFIED; }
205static inline int pte_young(pte_t pte) { return pte.pte_low & _PAGE_ACCESSED; }
206static inline int pte_file(pte_t pte) { return pte.pte_low & _PAGE_FILE; }
207
208static inline pte_t pte_wrprotect(pte_t pte)
209{
210 pte.pte_low &= ~(_PAGE_WRITE | _PAGE_SILENT_WRITE);
211 pte.pte_high &= ~_PAGE_SILENT_WRITE;
212 return pte;
213}
214
215static inline pte_t pte_mkclean(pte_t pte)
216{
217 pte.pte_low &= ~(_PAGE_MODIFIED | _PAGE_SILENT_WRITE);
218 pte.pte_high &= ~_PAGE_SILENT_WRITE;
219 return pte;
220}
221
222static inline pte_t pte_mkold(pte_t pte)
223{
224 pte.pte_low &= ~(_PAGE_ACCESSED | _PAGE_SILENT_READ);
225 pte.pte_high &= ~_PAGE_SILENT_READ;
226 return pte;
227}
228
229static inline pte_t pte_mkwrite(pte_t pte)
230{
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;
235 }
236 return pte;
237}
238
239static inline pte_t pte_mkdirty(pte_t pte)
240{
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;
245 }
246 return pte;
247}
248
249static inline pte_t pte_mkyoung(pte_t pte)
250{
251 pte.pte_low |= _PAGE_ACCESSED;
252 if (pte.pte_low & _PAGE_READ) {
253 pte.pte_low |= _PAGE_SILENT_READ;
254 pte.pte_high |= _PAGE_SILENT_READ;
255 }
256 return pte;
257}
258#else
259static inline int pte_write(pte_t pte) { return pte_val(pte) & _PAGE_WRITE; }
260static inline int pte_dirty(pte_t pte) { return pte_val(pte) & _PAGE_MODIFIED; }
261static inline int pte_young(pte_t pte) { return pte_val(pte) & _PAGE_ACCESSED; }
262static inline int pte_file(pte_t pte) { return pte_val(pte) & _PAGE_FILE; }
263
264static inline pte_t pte_wrprotect(pte_t pte)
265{
266 pte_val(pte) &= ~(_PAGE_WRITE | _PAGE_SILENT_WRITE);
267 return pte;
268}
269
270static inline pte_t pte_mkclean(pte_t pte)
271{
272 pte_val(pte) &= ~(_PAGE_MODIFIED|_PAGE_SILENT_WRITE);
273 return pte;
274}
275
276static inline pte_t pte_mkold(pte_t pte)
277{
278 pte_val(pte) &= ~(_PAGE_ACCESSED|_PAGE_SILENT_READ);
279 return pte;
280}
281
282static 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
290static 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
298static inline pte_t pte_mkyoung(pte_t pte)
299{
300 pte_val(pte) |= _PAGE_ACCESSED;
301 if (pte_val(pte) & _PAGE_READ)
302 pte_val(pte) |= _PAGE_SILENT_READ;
303 return pte;
304}
305
306#ifdef _PAGE_HUGE
307static inline int pte_huge(pte_t pte) { return pte_val(pte) & _PAGE_HUGE; }
308
309static inline pte_t pte_mkhuge(pte_t pte)
310{
311 pte_val(pte) |= _PAGE_HUGE;
312 return pte;
313}
314#endif
315#endif
316static inline int pte_special(pte_t pte) { return 0; }
317static inline pte_t pte_mkspecial(pte_t pte) { return pte; }
318
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323
324
325#define pgprot_noncached pgprot_noncached
326
327static 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
338
339
340#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot))
341
342#if defined(CONFIG_64BIT_PHYS_ADDR) && defined(CONFIG_CPU_MIPS32)
343static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
344{
345 pte.pte_low &= _PAGE_CHG_MASK;
346 pte.pte_high &= ~0x3f;
347 pte.pte_low |= pgprot_val(newprot);
348 pte.pte_high |= pgprot_val(newprot) & 0x3f;
349 return pte;
350}
351#else
352static 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
359extern void __update_tlb(struct vm_area_struct *vma, unsigned long address,
360 pte_t pte);
361extern void __update_cache(struct vm_area_struct *vma, unsigned long address,
362 pte_t pte);
363
364static 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
371#define kern_addr_valid(addr) (1)
372
373#ifdef CONFIG_64BIT_PHYS_ADDR
374extern int remap_pfn_range(struct vm_area_struct *vma, unsigned long from, unsigned long pfn, unsigned long size, pgprot_t prot);
375
376static 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);
383 return remap_pfn_range(vma, vaddr, phys_addr_high >> PAGE_SHIFT, size, prot);
384}
385#else
386#define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \
387 remap_pfn_range(vma, vaddr, pfn, size, prot)
388#endif
389
390#include <asm-generic/pgtable.h>
391
392
393
394
395
396#define HAVE_ARCH_UNMAPPED_AREA
397
398
399
400
401#define pgtable_cache_init() do { } while (0)
402
403#endif
404