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8#ifndef __UM_PGTABLE_H
9#define __UM_PGTABLE_H
10
11#include <asm/fixmap.h>
12
13#define _PAGE_PRESENT 0x001
14#define _PAGE_NEWPAGE 0x002
15#define _PAGE_NEWPROT 0x004
16#define _PAGE_RW 0x020
17#define _PAGE_USER 0x040
18#define _PAGE_ACCESSED 0x080
19#define _PAGE_DIRTY 0x100
20
21#define _PAGE_FILE 0x008
22#define _PAGE_PROTNONE 0x010
23
24
25#ifdef CONFIG_3_LEVEL_PGTABLES
26#include <asm/pgtable-3level.h>
27#else
28#include <asm/pgtable-2level.h>
29#endif
30
31extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
32
33
34extern unsigned long *empty_zero_page;
35
36#define pgtable_cache_init() do ; while (0)
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45
46extern unsigned long end_iomem;
47
48#define VMALLOC_OFFSET (__va_space)
49#define VMALLOC_START ((end_iomem + VMALLOC_OFFSET) & ~(VMALLOC_OFFSET-1))
50#define PKMAP_BASE ((FIXADDR_START - LAST_PKMAP * PAGE_SIZE) & PMD_MASK)
51#ifdef CONFIG_HIGHMEM
52# define VMALLOC_END (PKMAP_BASE-2*PAGE_SIZE)
53#else
54# define VMALLOC_END (FIXADDR_START-2*PAGE_SIZE)
55#endif
56#define MODULES_VADDR VMALLOC_START
57#define MODULES_END VMALLOC_END
58#define MODULES_LEN (MODULES_VADDR - MODULES_END)
59
60#define _PAGE_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED | _PAGE_DIRTY)
61#define _KERNPG_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED | _PAGE_DIRTY)
62#define _PAGE_CHG_MASK (PAGE_MASK | _PAGE_ACCESSED | _PAGE_DIRTY)
63#define __PAGE_KERNEL_EXEC \
64 (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED)
65#define PAGE_NONE __pgprot(_PAGE_PROTNONE | _PAGE_ACCESSED)
66#define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED)
67#define PAGE_COPY __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED)
68#define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED)
69#define PAGE_KERNEL __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED)
70#define PAGE_KERNEL_EXEC __pgprot(__PAGE_KERNEL_EXEC)
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77
78#define __P000 PAGE_NONE
79#define __P001 PAGE_READONLY
80#define __P010 PAGE_COPY
81#define __P011 PAGE_COPY
82#define __P100 PAGE_READONLY
83#define __P101 PAGE_READONLY
84#define __P110 PAGE_COPY
85#define __P111 PAGE_COPY
86
87#define __S000 PAGE_NONE
88#define __S001 PAGE_READONLY
89#define __S010 PAGE_SHARED
90#define __S011 PAGE_SHARED
91#define __S100 PAGE_READONLY
92#define __S101 PAGE_READONLY
93#define __S110 PAGE_SHARED
94#define __S111 PAGE_SHARED
95
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98
99
100#define ZERO_PAGE(vaddr) virt_to_page(empty_zero_page)
101
102#define pte_clear(mm,addr,xp) pte_set_val(*(xp), (phys_t) 0, __pgprot(_PAGE_NEWPAGE))
103
104#define pmd_none(x) (!((unsigned long)pmd_val(x) & ~_PAGE_NEWPAGE))
105#define pmd_bad(x) ((pmd_val(x) & (~PAGE_MASK & ~_PAGE_USER)) != _KERNPG_TABLE)
106
107#define pmd_present(x) (pmd_val(x) & _PAGE_PRESENT)
108#define pmd_clear(xp) do { pmd_val(*(xp)) = _PAGE_NEWPAGE; } while (0)
109
110#define pmd_newpage(x) (pmd_val(x) & _PAGE_NEWPAGE)
111#define pmd_mkuptodate(x) (pmd_val(x) &= ~_PAGE_NEWPAGE)
112
113#define pud_newpage(x) (pud_val(x) & _PAGE_NEWPAGE)
114#define pud_mkuptodate(x) (pud_val(x) &= ~_PAGE_NEWPAGE)
115
116#define pmd_page(pmd) phys_to_page(pmd_val(pmd) & PAGE_MASK)
117
118#define pte_page(x) pfn_to_page(pte_pfn(x))
119
120#define pte_present(x) pte_get_bits(x, (_PAGE_PRESENT | _PAGE_PROTNONE))
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127
128static inline int pte_none(pte_t pte)
129{
130 return pte_is_zero(pte);
131}
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136
137static inline int pte_read(pte_t pte)
138{
139 return((pte_get_bits(pte, _PAGE_USER)) &&
140 !(pte_get_bits(pte, _PAGE_PROTNONE)));
141}
142
143static inline int pte_exec(pte_t pte){
144 return((pte_get_bits(pte, _PAGE_USER)) &&
145 !(pte_get_bits(pte, _PAGE_PROTNONE)));
146}
147
148static inline int pte_write(pte_t pte)
149{
150 return((pte_get_bits(pte, _PAGE_RW)) &&
151 !(pte_get_bits(pte, _PAGE_PROTNONE)));
152}
153
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156
157static inline int pte_file(pte_t pte)
158{
159 return pte_get_bits(pte, _PAGE_FILE);
160}
161
162static inline int pte_dirty(pte_t pte)
163{
164 return pte_get_bits(pte, _PAGE_DIRTY);
165}
166
167static inline int pte_young(pte_t pte)
168{
169 return pte_get_bits(pte, _PAGE_ACCESSED);
170}
171
172static inline int pte_newpage(pte_t pte)
173{
174 return pte_get_bits(pte, _PAGE_NEWPAGE);
175}
176
177static inline int pte_newprot(pte_t pte)
178{
179 return(pte_present(pte) && (pte_get_bits(pte, _PAGE_NEWPROT)));
180}
181
182static inline int pte_special(pte_t pte)
183{
184 return 0;
185}
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192
193static inline pte_t pte_mknewprot(pte_t pte)
194{
195 pte_set_bits(pte, _PAGE_NEWPROT);
196 return(pte);
197}
198
199static inline pte_t pte_mkclean(pte_t pte)
200{
201 pte_clear_bits(pte, _PAGE_DIRTY);
202 return(pte);
203}
204
205static inline pte_t pte_mkold(pte_t pte)
206{
207 pte_clear_bits(pte, _PAGE_ACCESSED);
208 return(pte);
209}
210
211static inline pte_t pte_wrprotect(pte_t pte)
212{
213 pte_clear_bits(pte, _PAGE_RW);
214 return(pte_mknewprot(pte));
215}
216
217static inline pte_t pte_mkread(pte_t pte)
218{
219 pte_set_bits(pte, _PAGE_USER);
220 return(pte_mknewprot(pte));
221}
222
223static inline pte_t pte_mkdirty(pte_t pte)
224{
225 pte_set_bits(pte, _PAGE_DIRTY);
226 return(pte);
227}
228
229static inline pte_t pte_mkyoung(pte_t pte)
230{
231 pte_set_bits(pte, _PAGE_ACCESSED);
232 return(pte);
233}
234
235static inline pte_t pte_mkwrite(pte_t pte)
236{
237 pte_set_bits(pte, _PAGE_RW);
238 return(pte_mknewprot(pte));
239}
240
241static inline pte_t pte_mkuptodate(pte_t pte)
242{
243 pte_clear_bits(pte, _PAGE_NEWPAGE);
244 if(pte_present(pte))
245 pte_clear_bits(pte, _PAGE_NEWPROT);
246 return(pte);
247}
248
249static inline pte_t pte_mknewpage(pte_t pte)
250{
251 pte_set_bits(pte, _PAGE_NEWPAGE);
252 return(pte);
253}
254
255static inline pte_t pte_mkspecial(pte_t pte)
256{
257 return(pte);
258}
259
260static inline void set_pte(pte_t *pteptr, pte_t pteval)
261{
262 pte_copy(*pteptr, pteval);
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269 *pteptr = pte_mknewpage(*pteptr);
270 if(pte_present(*pteptr)) *pteptr = pte_mknewprot(*pteptr);
271}
272#define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval)
273
274#define __HAVE_ARCH_PTE_SAME
275static inline int pte_same(pte_t pte_a, pte_t pte_b)
276{
277 return !((pte_val(pte_a) ^ pte_val(pte_b)) & ~_PAGE_NEWPAGE);
278}
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284
285#define phys_to_page(phys) pfn_to_page(phys_to_pfn(phys))
286#define __virt_to_page(virt) phys_to_page(__pa(virt))
287#define page_to_phys(page) pfn_to_phys((pfn_t) page_to_pfn(page))
288#define virt_to_page(addr) __virt_to_page((const unsigned long) addr)
289
290#define mk_pte(page, pgprot) \
291 ({ pte_t pte; \
292 \
293 pte_set_val(pte, page_to_phys(page), (pgprot)); \
294 if (pte_present(pte)) \
295 pte_mknewprot(pte_mknewpage(pte)); \
296 pte;})
297
298static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
299{
300 pte_set_val(pte, (pte_val(pte) & _PAGE_CHG_MASK), newprot);
301 return pte;
302}
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309
310#define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD-1))
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316#define pgd_offset(mm, address) ((mm)->pgd+pgd_index(address))
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321
322#define pgd_offset_k(address) pgd_offset(&init_mm, address)
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330#define pmd_page_vaddr(pmd) ((unsigned long) __va(pmd_val(pmd) & PAGE_MASK))
331#define pmd_index(address) (((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1))
332
333#define pmd_page_vaddr(pmd) \
334 ((unsigned long) __va(pmd_val(pmd) & PAGE_MASK))
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342#define pte_index(address) (((address) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
343#define pte_offset_kernel(dir, address) \
344 ((pte_t *) pmd_page_vaddr(*(dir)) + pte_index(address))
345#define pte_offset_map(dir, address) \
346 ((pte_t *)page_address(pmd_page(*(dir))) + pte_index(address))
347#define pte_unmap(pte) do { } while (0)
348
349struct mm_struct;
350extern pte_t *virt_to_pte(struct mm_struct *mm, unsigned long addr);
351
352#define update_mmu_cache(vma,address,ptep) do ; while (0)
353
354
355#define __swp_type(x) (((x).val >> 5) & 0x1f)
356#define __swp_offset(x) ((x).val >> 11)
357
358#define __swp_entry(type, offset) \
359 ((swp_entry_t) { ((type) << 5) | ((offset) << 11) })
360#define __pte_to_swp_entry(pte) \
361 ((swp_entry_t) { pte_val(pte_mkuptodate(pte)) })
362#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
363
364#define kern_addr_valid(addr) (1)
365
366#include <asm-generic/pgtable.h>
367
368
369#define kpte_clear_flush(ptep, vaddr) \
370do { \
371 pte_clear(&init_mm, (vaddr), (ptep)); \
372 __flush_tlb_one((vaddr)); \
373} while (0)
374
375#endif
376