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25#ifndef __ASM_OPENRISC_PGTABLE_H
26#define __ASM_OPENRISC_PGTABLE_H
27
28#define __ARCH_USE_5LEVEL_HACK
29#include <asm-generic/pgtable-nopmd.h>
30
31#ifndef __ASSEMBLY__
32#include <asm/mmu.h>
33#include <asm/fixmap.h>
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46
47extern void paging_init(void);
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52
53#define set_pte(pteptr, pteval) ((*(pteptr)) = (pteval))
54#define set_pte_at(mm, addr, ptep, pteval) set_pte(ptep, pteval)
55
56
57
58
59#define set_pmd(pmdptr, pmdval) (*(pmdptr) = pmdval)
60
61#define PGDIR_SHIFT (PAGE_SHIFT + (PAGE_SHIFT-2))
62#define PGDIR_SIZE (1UL << PGDIR_SHIFT)
63#define PGDIR_MASK (~(PGDIR_SIZE-1))
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69
70
71#define PTRS_PER_PTE (1UL << (PAGE_SHIFT-2))
72
73#define PTRS_PER_PGD (1UL << (32-PGDIR_SHIFT))
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79
80#define USER_PTRS_PER_PGD (TASK_SIZE/PGDIR_SIZE)
81#define FIRST_USER_ADDRESS 0UL
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96
97#define VMALLOC_START (PAGE_OFFSET-0x04000000)
98#define VMALLOC_END (PAGE_OFFSET)
99#define VMALLOC_VMADDR(x) ((unsigned long)(x))
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125
126#define _PAGE_CC 0x001
127#define _PAGE_CI 0x002
128#define _PAGE_WBC 0x004
129#define _PAGE_WOM 0x008
130
131#define _PAGE_A 0x010
132#define _PAGE_D 0x020
133#define _PAGE_URE 0x040
134#define _PAGE_UWE 0x080
135
136#define _PAGE_SRE 0x100
137#define _PAGE_SWE 0x200
138#define _PAGE_EXEC 0x400
139#define _PAGE_U_SHARED 0x800
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147
148#define _PAGE_PRESENT _PAGE_CC
149#define _PAGE_USER _PAGE_URE
150#define _PAGE_WRITE (_PAGE_UWE | _PAGE_SWE)
151#define _PAGE_DIRTY _PAGE_D
152#define _PAGE_ACCESSED _PAGE_A
153#define _PAGE_NO_CACHE _PAGE_CI
154#define _PAGE_SHARED _PAGE_U_SHARED
155#define _PAGE_READ (_PAGE_URE | _PAGE_SRE)
156
157#define _PAGE_CHG_MASK (PAGE_MASK | _PAGE_ACCESSED | _PAGE_DIRTY)
158#define _PAGE_BASE (_PAGE_PRESENT | _PAGE_ACCESSED)
159#define _PAGE_ALL (_PAGE_PRESENT | _PAGE_ACCESSED)
160#define _KERNPG_TABLE \
161 (_PAGE_BASE | _PAGE_SRE | _PAGE_SWE | _PAGE_ACCESSED | _PAGE_DIRTY)
162
163#define PAGE_NONE __pgprot(_PAGE_ALL)
164#define PAGE_READONLY __pgprot(_PAGE_ALL | _PAGE_URE | _PAGE_SRE)
165#define PAGE_READONLY_X __pgprot(_PAGE_ALL | _PAGE_URE | _PAGE_SRE | _PAGE_EXEC)
166#define PAGE_SHARED \
167 __pgprot(_PAGE_ALL | _PAGE_URE | _PAGE_SRE | _PAGE_UWE | _PAGE_SWE \
168 | _PAGE_SHARED)
169#define PAGE_SHARED_X \
170 __pgprot(_PAGE_ALL | _PAGE_URE | _PAGE_SRE | _PAGE_UWE | _PAGE_SWE \
171 | _PAGE_SHARED | _PAGE_EXEC)
172#define PAGE_COPY __pgprot(_PAGE_ALL | _PAGE_URE | _PAGE_SRE)
173#define PAGE_COPY_X __pgprot(_PAGE_ALL | _PAGE_URE | _PAGE_SRE | _PAGE_EXEC)
174
175#define PAGE_KERNEL \
176 __pgprot(_PAGE_ALL | _PAGE_SRE | _PAGE_SWE \
177 | _PAGE_SHARED | _PAGE_DIRTY | _PAGE_EXEC)
178#define PAGE_KERNEL_RO \
179 __pgprot(_PAGE_ALL | _PAGE_SRE \
180 | _PAGE_SHARED | _PAGE_DIRTY | _PAGE_EXEC)
181#define PAGE_KERNEL_NOCACHE \
182 __pgprot(_PAGE_ALL | _PAGE_SRE | _PAGE_SWE \
183 | _PAGE_SHARED | _PAGE_DIRTY | _PAGE_EXEC | _PAGE_CI)
184
185#define __P000 PAGE_NONE
186#define __P001 PAGE_READONLY_X
187#define __P010 PAGE_COPY
188#define __P011 PAGE_COPY_X
189#define __P100 PAGE_READONLY
190#define __P101 PAGE_READONLY_X
191#define __P110 PAGE_COPY
192#define __P111 PAGE_COPY_X
193
194#define __S000 PAGE_NONE
195#define __S001 PAGE_READONLY_X
196#define __S010 PAGE_SHARED
197#define __S011 PAGE_SHARED_X
198#define __S100 PAGE_READONLY
199#define __S101 PAGE_READONLY_X
200#define __S110 PAGE_SHARED
201#define __S111 PAGE_SHARED_X
202
203
204extern unsigned long empty_zero_page[2048];
205#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
206
207
208#define BITS_PER_PTR (8*sizeof(unsigned long))
209
210
211#define PTR_MASK (~(sizeof(void *)-1))
212
213
214
215#define SIZEOF_PTR_LOG2 2
216
217
218#define PAGE_PTR(address) \
219((unsigned long)(address)>>(PAGE_SHIFT-SIZEOF_PTR_LOG2)&PTR_MASK&~PAGE_MASK)
220
221
222#define SET_PAGE_DIR(tsk, pgdir)
223
224#define pte_none(x) (!pte_val(x))
225#define pte_present(x) (pte_val(x) & _PAGE_PRESENT)
226#define pte_clear(mm, addr, xp) do { pte_val(*(xp)) = 0; } while (0)
227
228#define pmd_none(x) (!pmd_val(x))
229#define pmd_bad(x) ((pmd_val(x) & (~PAGE_MASK)) != _KERNPG_TABLE)
230#define pmd_present(x) (pmd_val(x) & _PAGE_PRESENT)
231#define pmd_clear(xp) do { pmd_val(*(xp)) = 0; } while (0)
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237
238static inline int pte_read(pte_t pte) { return pte_val(pte) & _PAGE_READ; }
239static inline int pte_write(pte_t pte) { return pte_val(pte) & _PAGE_WRITE; }
240static inline int pte_exec(pte_t pte) { return pte_val(pte) & _PAGE_EXEC; }
241static inline int pte_dirty(pte_t pte) { return pte_val(pte) & _PAGE_DIRTY; }
242static inline int pte_young(pte_t pte) { return pte_val(pte) & _PAGE_ACCESSED; }
243static inline int pte_special(pte_t pte) { return 0; }
244static inline pte_t pte_mkspecial(pte_t pte) { return pte; }
245
246static inline pte_t pte_wrprotect(pte_t pte)
247{
248 pte_val(pte) &= ~(_PAGE_WRITE);
249 return pte;
250}
251
252static inline pte_t pte_rdprotect(pte_t pte)
253{
254 pte_val(pte) &= ~(_PAGE_READ);
255 return pte;
256}
257
258static inline pte_t pte_exprotect(pte_t pte)
259{
260 pte_val(pte) &= ~(_PAGE_EXEC);
261 return pte;
262}
263
264static inline pte_t pte_mkclean(pte_t pte)
265{
266 pte_val(pte) &= ~(_PAGE_DIRTY);
267 return pte;
268}
269
270static inline pte_t pte_mkold(pte_t pte)
271{
272 pte_val(pte) &= ~(_PAGE_ACCESSED);
273 return pte;
274}
275
276static inline pte_t pte_mkwrite(pte_t pte)
277{
278 pte_val(pte) |= _PAGE_WRITE;
279 return pte;
280}
281
282static inline pte_t pte_mkread(pte_t pte)
283{
284 pte_val(pte) |= _PAGE_READ;
285 return pte;
286}
287
288static inline pte_t pte_mkexec(pte_t pte)
289{
290 pte_val(pte) |= _PAGE_EXEC;
291 return pte;
292}
293
294static inline pte_t pte_mkdirty(pte_t pte)
295{
296 pte_val(pte) |= _PAGE_DIRTY;
297 return pte;
298}
299
300static inline pte_t pte_mkyoung(pte_t pte)
301{
302 pte_val(pte) |= _PAGE_ACCESSED;
303 return pte;
304}
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316
317static inline pte_t __mk_pte(void *page, pgprot_t pgprot)
318{
319 pte_t pte;
320
321 pte_val(pte) = __pa(page) | pgprot_val(pgprot);
322 return pte;
323}
324
325#define mk_pte(page, pgprot) __mk_pte(page_address(page), (pgprot))
326
327#define mk_pte_phys(physpage, pgprot) \
328({ \
329 pte_t __pte; \
330 \
331 pte_val(__pte) = (physpage) + pgprot_val(pgprot); \
332 __pte; \
333})
334
335static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
336{
337 pte_val(pte) = (pte_val(pte) & _PAGE_CHG_MASK) | pgprot_val(newprot);
338 return pte;
339}
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348
349static inline unsigned long __pte_page(pte_t pte)
350{
351
352 return (unsigned long)__va(pte_val(pte) & PAGE_MASK);
353}
354
355#define pte_pagenr(pte) ((__pte_page(pte) - PAGE_OFFSET) >> PAGE_SHIFT)
356
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359#define __page_address(page) (PAGE_OFFSET + (((page) - mem_map) << PAGE_SHIFT))
360#define pte_page(pte) (mem_map+pte_pagenr(pte))
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366
367static inline void pmd_set(pmd_t *pmdp, pte_t *ptep)
368{
369 pmd_val(*pmdp) = _KERNPG_TABLE | (unsigned long) ptep;
370}
371
372#define pmd_page(pmd) (pfn_to_page(pmd_val(pmd) >> PAGE_SHIFT))
373#define pmd_page_kernel(pmd) ((unsigned long) __va(pmd_val(pmd) & PAGE_MASK))
374
375
376#define pgd_index(address) ((address >> PGDIR_SHIFT) & (PTRS_PER_PGD-1))
377
378#define __pgd_offset(address) pgd_index(address)
379
380#define pgd_offset(mm, address) ((mm)->pgd+pgd_index(address))
381
382
383#define pgd_offset_k(address) pgd_offset(&init_mm, address)
384
385#define __pmd_offset(address) \
386 (((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1))
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393
394#define __pte_offset(address) \
395 (((address) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
396#define pte_offset_kernel(dir, address) \
397 ((pte_t *) pmd_page_kernel(*(dir)) + __pte_offset(address))
398#define pte_offset_map(dir, address) \
399 ((pte_t *)page_address(pmd_page(*(dir))) + __pte_offset(address))
400#define pte_offset_map_nested(dir, address) \
401 pte_offset_map(dir, address)
402
403#define pte_unmap(pte) do { } while (0)
404#define pte_unmap_nested(pte) do { } while (0)
405#define pte_pfn(x) ((unsigned long)(((x).pte)) >> PAGE_SHIFT)
406#define pfn_pte(pfn, prot) __pte((((pfn) << PAGE_SHIFT)) | pgprot_val(prot))
407
408#define pte_ERROR(e) \
409 printk(KERN_ERR "%s:%d: bad pte %p(%08lx).\n", \
410 __FILE__, __LINE__, &(e), pte_val(e))
411#define pgd_ERROR(e) \
412 printk(KERN_ERR "%s:%d: bad pgd %p(%08lx).\n", \
413 __FILE__, __LINE__, &(e), pgd_val(e))
414
415extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
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422
423static inline void update_mmu_cache(struct vm_area_struct *vma,
424 unsigned long address, pte_t *pte)
425{
426}
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432
433#define __swp_type(x) (((x).val >> 5) & 0x7f)
434#define __swp_offset(x) ((x).val >> 12)
435#define __swp_entry(type, offset) \
436 ((swp_entry_t) { ((type) << 5) | ((offset) << 12) })
437#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
438#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
439
440#define kern_addr_valid(addr) (1)
441
442#include <asm-generic/pgtable.h>
443
444
445
446
447#define pgtable_cache_init() do { } while (0)
448
449typedef pte_t *pte_addr_t;
450
451#endif
452#endif
453