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25#ifndef __ASM_OPENRISC_PGTABLE_H
26#define __ASM_OPENRISC_PGTABLE_H
27
28#include <asm-generic/pgtable-nopmd.h>
29
30#ifndef __ASSEMBLY__
31#include <asm/mmu.h>
32#include <asm/fixmap.h>
33
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45
46extern void paging_init(void);
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51
52#define set_pte(pteptr, pteval) ((*(pteptr)) = (pteval))
53#define set_pte_at(mm, addr, ptep, pteval) set_pte(ptep, pteval)
54
55
56
57
58#define set_pmd(pmdptr, pmdval) (*(pmdptr) = pmdval)
59
60#define PGDIR_SHIFT (PAGE_SHIFT + (PAGE_SHIFT-2))
61#define PGDIR_SIZE (1UL << PGDIR_SHIFT)
62#define PGDIR_MASK (~(PGDIR_SIZE-1))
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68
69
70#define PTRS_PER_PTE (1UL << (PAGE_SHIFT-2))
71
72#define PTRS_PER_PGD (1UL << (PAGE_SHIFT-2))
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78
79#define USER_PTRS_PER_PGD (TASK_SIZE/PGDIR_SIZE)
80#define FIRST_USER_ADDRESS 0UL
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95
96#define VMALLOC_START (PAGE_OFFSET-0x04000000)
97#define VMALLOC_END (PAGE_OFFSET)
98#define VMALLOC_VMADDR(x) ((unsigned long)(x))
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124
125#define _PAGE_CC 0x001
126#define _PAGE_CI 0x002
127#define _PAGE_WBC 0x004
128#define _PAGE_WOM 0x008
129
130#define _PAGE_A 0x010
131#define _PAGE_D 0x020
132#define _PAGE_URE 0x040
133#define _PAGE_UWE 0x080
134
135#define _PAGE_SRE 0x100
136#define _PAGE_SWE 0x200
137#define _PAGE_EXEC 0x400
138#define _PAGE_U_SHARED 0x800
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146
147#define _PAGE_PRESENT _PAGE_CC
148#define _PAGE_USER _PAGE_URE
149#define _PAGE_WRITE (_PAGE_UWE | _PAGE_SWE)
150#define _PAGE_DIRTY _PAGE_D
151#define _PAGE_ACCESSED _PAGE_A
152#define _PAGE_NO_CACHE _PAGE_CI
153#define _PAGE_SHARED _PAGE_U_SHARED
154#define _PAGE_READ (_PAGE_URE | _PAGE_SRE)
155
156#define _PAGE_CHG_MASK (PAGE_MASK | _PAGE_ACCESSED | _PAGE_DIRTY)
157#define _PAGE_BASE (_PAGE_PRESENT | _PAGE_ACCESSED)
158#define _PAGE_ALL (_PAGE_PRESENT | _PAGE_ACCESSED)
159#define _KERNPG_TABLE \
160 (_PAGE_BASE | _PAGE_SRE | _PAGE_SWE | _PAGE_ACCESSED | _PAGE_DIRTY)
161
162#define PAGE_NONE __pgprot(_PAGE_ALL)
163#define PAGE_READONLY __pgprot(_PAGE_ALL | _PAGE_URE | _PAGE_SRE)
164#define PAGE_READONLY_X __pgprot(_PAGE_ALL | _PAGE_URE | _PAGE_SRE | _PAGE_EXEC)
165#define PAGE_SHARED \
166 __pgprot(_PAGE_ALL | _PAGE_URE | _PAGE_SRE | _PAGE_UWE | _PAGE_SWE \
167 | _PAGE_SHARED)
168#define PAGE_SHARED_X \
169 __pgprot(_PAGE_ALL | _PAGE_URE | _PAGE_SRE | _PAGE_UWE | _PAGE_SWE \
170 | _PAGE_SHARED | _PAGE_EXEC)
171#define PAGE_COPY __pgprot(_PAGE_ALL | _PAGE_URE | _PAGE_SRE)
172#define PAGE_COPY_X __pgprot(_PAGE_ALL | _PAGE_URE | _PAGE_SRE | _PAGE_EXEC)
173
174#define PAGE_KERNEL \
175 __pgprot(_PAGE_ALL | _PAGE_SRE | _PAGE_SWE \
176 | _PAGE_SHARED | _PAGE_DIRTY | _PAGE_EXEC)
177#define PAGE_KERNEL_RO \
178 __pgprot(_PAGE_ALL | _PAGE_SRE \
179 | _PAGE_SHARED | _PAGE_DIRTY | _PAGE_EXEC)
180#define PAGE_KERNEL_NOCACHE \
181 __pgprot(_PAGE_ALL | _PAGE_SRE | _PAGE_SWE \
182 | _PAGE_SHARED | _PAGE_DIRTY | _PAGE_EXEC | _PAGE_CI)
183
184#define __P000 PAGE_NONE
185#define __P001 PAGE_READONLY_X
186#define __P010 PAGE_COPY
187#define __P011 PAGE_COPY_X
188#define __P100 PAGE_READONLY
189#define __P101 PAGE_READONLY_X
190#define __P110 PAGE_COPY
191#define __P111 PAGE_COPY_X
192
193#define __S000 PAGE_NONE
194#define __S001 PAGE_READONLY_X
195#define __S010 PAGE_SHARED
196#define __S011 PAGE_SHARED_X
197#define __S100 PAGE_READONLY
198#define __S101 PAGE_READONLY_X
199#define __S110 PAGE_SHARED
200#define __S111 PAGE_SHARED_X
201
202
203extern unsigned long empty_zero_page[2048];
204#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
205
206
207#define BITS_PER_PTR (8*sizeof(unsigned long))
208
209
210#define PTR_MASK (~(sizeof(void *)-1))
211
212
213
214#define SIZEOF_PTR_LOG2 2
215
216
217#define PAGE_PTR(address) \
218((unsigned long)(address)>>(PAGE_SHIFT-SIZEOF_PTR_LOG2)&PTR_MASK&~PAGE_MASK)
219
220
221#define SET_PAGE_DIR(tsk, pgdir)
222
223#define pte_none(x) (!pte_val(x))
224#define pte_present(x) (pte_val(x) & _PAGE_PRESENT)
225#define pte_clear(mm, addr, xp) do { pte_val(*(xp)) = 0; } while (0)
226
227#define pmd_none(x) (!pmd_val(x))
228#define pmd_bad(x) ((pmd_val(x) & (~PAGE_MASK)) != _KERNPG_TABLE)
229#define pmd_present(x) (pmd_val(x) & _PAGE_PRESENT)
230#define pmd_clear(xp) do { pmd_val(*(xp)) = 0; } while (0)
231
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236
237static inline int pte_read(pte_t pte) { return pte_val(pte) & _PAGE_READ; }
238static inline int pte_write(pte_t pte) { return pte_val(pte) & _PAGE_WRITE; }
239static inline int pte_exec(pte_t pte) { return pte_val(pte) & _PAGE_EXEC; }
240static inline int pte_dirty(pte_t pte) { return pte_val(pte) & _PAGE_DIRTY; }
241static inline int pte_young(pte_t pte) { return pte_val(pte) & _PAGE_ACCESSED; }
242static inline int pte_special(pte_t pte) { return 0; }
243static inline pte_t pte_mkspecial(pte_t pte) { return pte; }
244
245static inline pte_t pte_wrprotect(pte_t pte)
246{
247 pte_val(pte) &= ~(_PAGE_WRITE);
248 return pte;
249}
250
251static inline pte_t pte_rdprotect(pte_t pte)
252{
253 pte_val(pte) &= ~(_PAGE_READ);
254 return pte;
255}
256
257static inline pte_t pte_exprotect(pte_t pte)
258{
259 pte_val(pte) &= ~(_PAGE_EXEC);
260 return pte;
261}
262
263static inline pte_t pte_mkclean(pte_t pte)
264{
265 pte_val(pte) &= ~(_PAGE_DIRTY);
266 return pte;
267}
268
269static inline pte_t pte_mkold(pte_t pte)
270{
271 pte_val(pte) &= ~(_PAGE_ACCESSED);
272 return pte;
273}
274
275static inline pte_t pte_mkwrite(pte_t pte)
276{
277 pte_val(pte) |= _PAGE_WRITE;
278 return pte;
279}
280
281static inline pte_t pte_mkread(pte_t pte)
282{
283 pte_val(pte) |= _PAGE_READ;
284 return pte;
285}
286
287static inline pte_t pte_mkexec(pte_t pte)
288{
289 pte_val(pte) |= _PAGE_EXEC;
290 return pte;
291}
292
293static inline pte_t pte_mkdirty(pte_t pte)
294{
295 pte_val(pte) |= _PAGE_DIRTY;
296 return pte;
297}
298
299static inline pte_t pte_mkyoung(pte_t pte)
300{
301 pte_val(pte) |= _PAGE_ACCESSED;
302 return pte;
303}
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315
316static inline pte_t __mk_pte(void *page, pgprot_t pgprot)
317{
318 pte_t pte;
319
320 pte_val(pte) = __pa(page) | pgprot_val(pgprot);
321 return pte;
322}
323
324#define mk_pte(page, pgprot) __mk_pte(page_address(page), (pgprot))
325
326#define mk_pte_phys(physpage, pgprot) \
327({ \
328 pte_t __pte; \
329 \
330 pte_val(__pte) = (physpage) + pgprot_val(pgprot); \
331 __pte; \
332})
333
334static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
335{
336 pte_val(pte) = (pte_val(pte) & _PAGE_CHG_MASK) | pgprot_val(newprot);
337 return pte;
338}
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347
348static inline unsigned long __pte_page(pte_t pte)
349{
350
351 return (unsigned long)__va(pte_val(pte) & PAGE_MASK);
352}
353
354#define pte_pagenr(pte) ((__pte_page(pte) - PAGE_OFFSET) >> PAGE_SHIFT)
355
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357
358#define __page_address(page) (PAGE_OFFSET + (((page) - mem_map) << PAGE_SHIFT))
359#define pte_page(pte) (mem_map+pte_pagenr(pte))
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365
366static inline void pmd_set(pmd_t *pmdp, pte_t *ptep)
367{
368 pmd_val(*pmdp) = _KERNPG_TABLE | (unsigned long) ptep;
369}
370
371#define pmd_page(pmd) (pfn_to_page(pmd_val(pmd) >> PAGE_SHIFT))
372#define pmd_page_kernel(pmd) ((unsigned long) __va(pmd_val(pmd) & PAGE_MASK))
373
374
375#define pgd_index(address) ((address >> PGDIR_SHIFT) & (PTRS_PER_PGD-1))
376
377#define __pgd_offset(address) pgd_index(address)
378
379#define pgd_offset(mm, address) ((mm)->pgd+pgd_index(address))
380
381
382#define pgd_offset_k(address) pgd_offset(&init_mm, address)
383
384#define __pmd_offset(address) \
385 (((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1))
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393#define __pte_offset(address) \
394 (((address) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
395#define pte_offset_kernel(dir, address) \
396 ((pte_t *) pmd_page_kernel(*(dir)) + __pte_offset(address))
397#define pte_offset_map(dir, address) \
398 ((pte_t *)page_address(pmd_page(*(dir))) + __pte_offset(address))
399#define pte_offset_map_nested(dir, address) \
400 pte_offset_map(dir, address)
401
402#define pte_unmap(pte) do { } while (0)
403#define pte_unmap_nested(pte) do { } while (0)
404#define pte_pfn(x) ((unsigned long)(((x).pte)) >> PAGE_SHIFT)
405#define pfn_pte(pfn, prot) __pte((((pfn) << PAGE_SHIFT)) | pgprot_val(prot))
406
407#define pte_ERROR(e) \
408 printk(KERN_ERR "%s:%d: bad pte %p(%08lx).\n", \
409 __FILE__, __LINE__, &(e), pte_val(e))
410#define pgd_ERROR(e) \
411 printk(KERN_ERR "%s:%d: bad pgd %p(%08lx).\n", \
412 __FILE__, __LINE__, &(e), pgd_val(e))
413
414extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
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421
422static inline void update_mmu_cache(struct vm_area_struct *vma,
423 unsigned long address, pte_t *pte)
424{
425}
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431
432#define __swp_type(x) (((x).val >> 5) & 0x7f)
433#define __swp_offset(x) ((x).val >> 12)
434#define __swp_entry(type, offset) \
435 ((swp_entry_t) { ((type) << 5) | ((offset) << 12) })
436#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
437#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
438
439#define kern_addr_valid(addr) (1)
440
441#include <asm-generic/pgtable.h>
442
443
444
445
446#define pgtable_cache_init() do { } while (0)
447
448typedef pte_t *pte_addr_t;
449
450#endif
451#endif
452