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8#ifndef __ASM_AVR32_PGTABLE_H
9#define __ASM_AVR32_PGTABLE_H
10
11#include <asm/addrspace.h>
12
13#ifndef __ASSEMBLY__
14#include <linux/sched.h>
15
16#endif
17
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20
21#include <asm/pgtable-2level.h>
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26
27#define PMD_SIZE (1UL << PMD_SHIFT)
28#define PMD_MASK (~(PMD_SIZE-1))
29#define PGDIR_SIZE (1UL << PGDIR_SHIFT)
30#define PGDIR_MASK (~(PGDIR_SIZE-1))
31
32#define USER_PTRS_PER_PGD (TASK_SIZE / PGDIR_SIZE)
33#define FIRST_USER_ADDRESS 0UL
34
35#ifndef __ASSEMBLY__
36extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
37extern void paging_init(void);
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43extern struct page *empty_zero_page;
44#define ZERO_PAGE(vaddr) (empty_zero_page)
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61
62#define VMALLOC_OFFSET (8 * 1024 * 1024)
63#define VMALLOC_START (P3SEG + VMALLOC_OFFSET)
64#define VMALLOC_END (P4SEG - VMALLOC_OFFSET)
65#endif
66
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70
71#define _TLBEHI_BIT_VALID 9
72#define _TLBEHI_VALID (1 << _TLBEHI_BIT_VALID)
73
74#define _PAGE_BIT_WT 0
75#define _PAGE_BIT_DIRTY 1
76#define _PAGE_BIT_SZ0 2
77#define _PAGE_BIT_SZ1 3
78#define _PAGE_BIT_EXECUTE 4
79#define _PAGE_BIT_RW 5
80#define _PAGE_BIT_USER 6
81#define _PAGE_BIT_BUFFER 7
82#define _PAGE_BIT_GLOBAL 8
83#define _PAGE_BIT_CACHABLE 9
84
85
86#define _PAGE_BIT_PRESENT 10
87#define _PAGE_BIT_ACCESSED 11
88
89#define _PAGE_WT (1 << _PAGE_BIT_WT)
90#define _PAGE_DIRTY (1 << _PAGE_BIT_DIRTY)
91#define _PAGE_EXECUTE (1 << _PAGE_BIT_EXECUTE)
92#define _PAGE_RW (1 << _PAGE_BIT_RW)
93#define _PAGE_USER (1 << _PAGE_BIT_USER)
94#define _PAGE_BUFFER (1 << _PAGE_BIT_BUFFER)
95#define _PAGE_GLOBAL (1 << _PAGE_BIT_GLOBAL)
96#define _PAGE_CACHABLE (1 << _PAGE_BIT_CACHABLE)
97
98
99#define _PAGE_ACCESSED (1 << _PAGE_BIT_ACCESSED)
100#define _PAGE_PRESENT (1 << _PAGE_BIT_PRESENT)
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111
112#define _PAGE_TYPE_MASK ((1 << _PAGE_BIT_SZ0) | (1 << _PAGE_BIT_SZ1))
113#define _PAGE_TYPE_NONE (0 << _PAGE_BIT_SZ0)
114#define _PAGE_TYPE_SMALL (1 << _PAGE_BIT_SZ0)
115#define _PAGE_TYPE_MEDIUM (2 << _PAGE_BIT_SZ0)
116#define _PAGE_TYPE_LARGE (3 << _PAGE_BIT_SZ0)
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122
123
124#define _PAGE_FLAGS_HARDWARE_MASK 0xfffff3ff
125
126#define _PAGE_FLAGS_CACHE_MASK (_PAGE_CACHABLE | _PAGE_BUFFER | _PAGE_WT)
127
128
129#define _PAGE_CHG_MASK (PTE_MASK | _PAGE_ACCESSED | _PAGE_DIRTY \
130 | _PAGE_FLAGS_CACHE_MASK)
131
132#define _PAGE_FLAGS_READ (_PAGE_CACHABLE | _PAGE_BUFFER)
133#define _PAGE_FLAGS_WRITE (_PAGE_FLAGS_READ | _PAGE_RW | _PAGE_DIRTY)
134
135#define _PAGE_NORMAL(x) __pgprot((x) | _PAGE_PRESENT | _PAGE_TYPE_SMALL \
136 | _PAGE_ACCESSED)
137
138#define PAGE_NONE (_PAGE_ACCESSED | _PAGE_TYPE_NONE)
139#define PAGE_READ (_PAGE_FLAGS_READ | _PAGE_USER)
140#define PAGE_EXEC (_PAGE_FLAGS_READ | _PAGE_EXECUTE | _PAGE_USER)
141#define PAGE_WRITE (_PAGE_FLAGS_WRITE | _PAGE_USER)
142#define PAGE_KERNEL _PAGE_NORMAL(_PAGE_FLAGS_WRITE | _PAGE_EXECUTE | _PAGE_GLOBAL)
143#define PAGE_KERNEL_RO _PAGE_NORMAL(_PAGE_FLAGS_READ | _PAGE_EXECUTE | _PAGE_GLOBAL)
144
145#define _PAGE_P(x) _PAGE_NORMAL((x) & ~(_PAGE_RW | _PAGE_DIRTY))
146#define _PAGE_S(x) _PAGE_NORMAL(x)
147
148#define PAGE_COPY _PAGE_P(PAGE_WRITE | PAGE_READ)
149#define PAGE_SHARED _PAGE_S(PAGE_WRITE | PAGE_READ)
150
151#ifndef __ASSEMBLY__
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162#define __P000 __pgprot(PAGE_NONE)
163#define __P001 _PAGE_P(PAGE_READ)
164#define __P010 _PAGE_P(PAGE_WRITE)
165#define __P011 _PAGE_P(PAGE_WRITE | PAGE_READ)
166#define __P100 _PAGE_P(PAGE_EXEC)
167#define __P101 _PAGE_P(PAGE_EXEC | PAGE_READ)
168#define __P110 _PAGE_P(PAGE_EXEC | PAGE_WRITE)
169#define __P111 _PAGE_P(PAGE_EXEC | PAGE_WRITE | PAGE_READ)
170
171#define __S000 __pgprot(PAGE_NONE)
172#define __S001 _PAGE_S(PAGE_READ)
173#define __S010 _PAGE_S(PAGE_WRITE)
174#define __S011 _PAGE_S(PAGE_WRITE | PAGE_READ)
175#define __S100 _PAGE_S(PAGE_EXEC)
176#define __S101 _PAGE_S(PAGE_EXEC | PAGE_READ)
177#define __S110 _PAGE_S(PAGE_EXEC | PAGE_WRITE)
178#define __S111 _PAGE_S(PAGE_EXEC | PAGE_WRITE | PAGE_READ)
179
180#define pte_none(x) (!pte_val(x))
181#define pte_present(x) (pte_val(x) & _PAGE_PRESENT)
182
183#define pte_clear(mm,addr,xp) \
184 do { \
185 set_pte_at(mm, addr, xp, __pte(0)); \
186 } while (0)
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191
192static inline int pte_write(pte_t pte)
193{
194 return pte_val(pte) & _PAGE_RW;
195}
196static inline int pte_dirty(pte_t pte)
197{
198 return pte_val(pte) & _PAGE_DIRTY;
199}
200static inline int pte_young(pte_t pte)
201{
202 return pte_val(pte) & _PAGE_ACCESSED;
203}
204static inline int pte_special(pte_t pte)
205{
206 return 0;
207}
208
209
210static inline pte_t pte_wrprotect(pte_t pte)
211{
212 set_pte(&pte, __pte(pte_val(pte) & ~_PAGE_RW));
213 return pte;
214}
215static inline pte_t pte_mkclean(pte_t pte)
216{
217 set_pte(&pte, __pte(pte_val(pte) & ~_PAGE_DIRTY));
218 return pte;
219}
220static inline pte_t pte_mkold(pte_t pte)
221{
222 set_pte(&pte, __pte(pte_val(pte) & ~_PAGE_ACCESSED));
223 return pte;
224}
225static inline pte_t pte_mkwrite(pte_t pte)
226{
227 set_pte(&pte, __pte(pte_val(pte) | _PAGE_RW));
228 return pte;
229}
230static inline pte_t pte_mkdirty(pte_t pte)
231{
232 set_pte(&pte, __pte(pte_val(pte) | _PAGE_DIRTY));
233 return pte;
234}
235static inline pte_t pte_mkyoung(pte_t pte)
236{
237 set_pte(&pte, __pte(pte_val(pte) | _PAGE_ACCESSED));
238 return pte;
239}
240static inline pte_t pte_mkspecial(pte_t pte)
241{
242 return pte;
243}
244
245#define pmd_none(x) (!pmd_val(x))
246#define pmd_present(x) (pmd_val(x))
247
248static inline void pmd_clear(pmd_t *pmdp)
249{
250 set_pmd(pmdp, __pmd(0));
251}
252
253#define pmd_bad(x) (pmd_val(x) & ~PAGE_MASK)
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259#define pages_to_mb(x) ((x) >> (20-PAGE_SHIFT))
260#define pte_page(x) (pfn_to_page(pte_pfn(x)))
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265#define pgprot_noncached(prot) \
266 __pgprot(pgprot_val(prot) & ~(_PAGE_BUFFER | _PAGE_CACHABLE))
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271#define pgprot_writecombine(prot) \
272 __pgprot((pgprot_val(prot) & ~_PAGE_CACHABLE) | _PAGE_BUFFER)
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280#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot))
281
282static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
283{
284 set_pte(&pte, __pte((pte_val(pte) & _PAGE_CHG_MASK)
285 | pgprot_val(newprot)));
286 return pte;
287}
288
289#define page_pte(page) page_pte_prot(page, __pgprot(0))
290
291#define pmd_page_vaddr(pmd) pmd_val(pmd)
292#define pmd_page(pmd) (virt_to_page(pmd_val(pmd)))
293
294
295#define pgd_index(address) (((address) >> PGDIR_SHIFT) \
296 & (PTRS_PER_PGD - 1))
297#define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address))
298
299
300#define pgd_offset_k(address) pgd_offset(&init_mm, address)
301
302
303#define pte_index(address) \
304 ((address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
305#define pte_offset(dir, address) \
306 ((pte_t *) pmd_page_vaddr(*(dir)) + pte_index(address))
307#define pte_offset_kernel(dir, address) \
308 ((pte_t *) pmd_page_vaddr(*(dir)) + pte_index(address))
309#define pte_offset_map(dir, address) pte_offset_kernel(dir, address)
310#define pte_unmap(pte) do { } while (0)
311
312struct vm_area_struct;
313extern void update_mmu_cache(struct vm_area_struct * vma,
314 unsigned long address, pte_t *ptep);
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330#define __swp_type(x) (((x).val >> 4) & 0x3f)
331#define __swp_offset(x) ((x).val >> 11)
332#define __swp_entry(type, offset) ((swp_entry_t) { ((type) << 4) | ((offset) << 11) })
333#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
334#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
335
336typedef pte_t *pte_addr_t;
337
338#define kern_addr_valid(addr) (1)
339
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341#define pgtable_cache_init() do { } while(0)
342
343#include <asm-generic/pgtable.h>
344
345#endif
346
347#endif
348