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35#ifndef _ASM_ARC_PGTABLE_H
36#define _ASM_ARC_PGTABLE_H
37
38#include <asm/page.h>
39#include <asm/mmu.h>
40#include <asm-generic/pgtable-nopmd.h>
41
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55
56#if (CONFIG_ARC_MMU_VER <= 2)
57
58#define _PAGE_ACCESSED (1<<1)
59#define _PAGE_CACHEABLE (1<<2)
60#define _PAGE_U_EXECUTE (1<<3)
61#define _PAGE_U_WRITE (1<<4)
62#define _PAGE_U_READ (1<<5)
63#define _PAGE_K_EXECUTE (1<<6)
64#define _PAGE_K_WRITE (1<<7)
65#define _PAGE_K_READ (1<<8)
66#define _PAGE_GLOBAL (1<<9)
67#define _PAGE_MODIFIED (1<<10)
68#define _PAGE_FILE (1<<10)
69#define _PAGE_PRESENT (1<<11)
70
71#else
72
73
74#define _PAGE_CACHEABLE (1<<0)
75#define _PAGE_U_EXECUTE (1<<1)
76#define _PAGE_U_WRITE (1<<2)
77#define _PAGE_U_READ (1<<3)
78#define _PAGE_K_EXECUTE (1<<4)
79#define _PAGE_K_WRITE (1<<5)
80#define _PAGE_K_READ (1<<6)
81#define _PAGE_ACCESSED (1<<7)
82
83
84#define _PAGE_GLOBAL (1<<8)
85#define _PAGE_PRESENT (1<<9)
86#define _PAGE_SHARED_CODE (1<<10)
87
88
89#define _PAGE_MODIFIED (1<<11)
90#define _PAGE_FILE (1<<12)
91
92#define _PAGE_SHARED_CODE_H (1<<31)
93#endif
94
95
96#define _K_PAGE_PERMS (_PAGE_K_EXECUTE | _PAGE_K_WRITE | _PAGE_K_READ | \
97 _PAGE_GLOBAL | _PAGE_PRESENT)
98
99#ifdef CONFIG_ARC_CACHE_PAGES
100#define _PAGE_DEF_CACHEABLE _PAGE_CACHEABLE
101#else
102#define _PAGE_DEF_CACHEABLE (0)
103#endif
104
105
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108
109
110#define ___DEF (_PAGE_PRESENT | _PAGE_DEF_CACHEABLE)
111
112#define _PAGE_READ (_PAGE_U_READ | _PAGE_K_READ)
113#define _PAGE_WRITE (_PAGE_U_WRITE | _PAGE_K_WRITE)
114#define _PAGE_EXECUTE (_PAGE_U_EXECUTE | _PAGE_K_EXECUTE)
115
116
117#define _PAGE_CHG_MASK (PAGE_MASK | _PAGE_ACCESSED | _PAGE_MODIFIED)
118
119
120#define PAGE_U_NONE __pgprot(___DEF)
121#define PAGE_U_R __pgprot(___DEF | _PAGE_READ)
122#define PAGE_U_W_R __pgprot(___DEF | _PAGE_READ | _PAGE_WRITE)
123#define PAGE_U_X_R __pgprot(___DEF | _PAGE_READ | _PAGE_EXECUTE)
124#define PAGE_U_X_W_R __pgprot(___DEF | _PAGE_READ | _PAGE_WRITE | \
125 _PAGE_EXECUTE)
126
127#define PAGE_SHARED PAGE_U_W_R
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132
133#define PAGE_KERNEL __pgprot(_K_PAGE_PERMS | _PAGE_DEF_CACHEABLE)
134
135
136#define PAGE_KERNEL_NO_CACHE __pgprot(_K_PAGE_PERMS)
137
138
139#define PTE_BITS_IN_PD0 (_PAGE_GLOBAL | _PAGE_PRESENT)
140#define PTE_BITS_IN_PD1 (PAGE_MASK | _PAGE_CACHEABLE | \
141 _PAGE_U_EXECUTE | _PAGE_U_WRITE | _PAGE_U_READ | \
142 _PAGE_K_EXECUTE | _PAGE_K_WRITE | _PAGE_K_READ)
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163#define __P000 PAGE_U_NONE
164#define __P001 PAGE_U_R
165#define __P010 PAGE_U_R
166#define __P011 PAGE_U_R
167#define __P100 PAGE_U_X_R
168#define __P101 PAGE_U_X_R
169#define __P110 PAGE_U_X_R
170#define __P111 PAGE_U_X_R
171
172#define __S000 PAGE_U_NONE
173#define __S001 PAGE_U_R
174#define __S010 PAGE_U_W_R
175#define __S011 PAGE_U_W_R
176#define __S100 PAGE_U_X_R
177#define __S101 PAGE_U_X_R
178#define __S110 PAGE_U_X_W_R
179#define __S111 PAGE_U_X_W_R
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198
199#define BITS_IN_PAGE PAGE_SHIFT
200
201
202#if defined(CONFIG_ARC_PAGE_SIZE_8K)
203#define BITS_FOR_PTE 8
204#elif defined(CONFIG_ARC_PAGE_SIZE_16K)
205#define BITS_FOR_PTE 8
206#elif defined(CONFIG_ARC_PAGE_SIZE_4K)
207#define BITS_FOR_PTE 9
208#endif
209
210#define BITS_FOR_PGD (32 - BITS_FOR_PTE - BITS_IN_PAGE)
211
212#define PGDIR_SHIFT (BITS_FOR_PTE + BITS_IN_PAGE)
213#define PGDIR_SIZE (1UL << PGDIR_SHIFT)
214#define PGDIR_MASK (~(PGDIR_SIZE-1))
215
216#ifdef __ASSEMBLY__
217#define PTRS_PER_PTE (1 << BITS_FOR_PTE)
218#define PTRS_PER_PGD (1 << BITS_FOR_PGD)
219#else
220#define PTRS_PER_PTE (1UL << BITS_FOR_PTE)
221#define PTRS_PER_PGD (1UL << BITS_FOR_PGD)
222#endif
223
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226
227#define USER_PTRS_PER_PGD (TASK_SIZE / PGDIR_SIZE)
228
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232
233#define FIRST_USER_ADDRESS 0
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238
239
240#ifndef __ASSEMBLY__
241
242#define pte_ERROR(e) \
243 pr_crit("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, pte_val(e))
244#define pgd_ERROR(e) \
245 pr_crit("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e))
246
247
248extern char empty_zero_page[PAGE_SIZE];
249#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
250
251#define pte_unmap(pte) do { } while (0)
252#define pte_unmap_nested(pte) do { } while (0)
253
254#define set_pte(pteptr, pteval) ((*(pteptr)) = (pteval))
255#define set_pmd(pmdptr, pmdval) (*(pmdptr) = pmdval)
256
257
258#define pmd_page(pmd) virt_to_page(pmd_val(pmd) & PAGE_MASK)
259
260
261#define pmd_page_vaddr(pmd) (pmd_val(pmd) & PAGE_MASK)
262
263
264static inline void pmd_set(pmd_t *pmdp, pte_t *ptep)
265{
266 pmd_val(*pmdp) = (unsigned long)ptep;
267}
268
269#define pte_none(x) (!pte_val(x))
270#define pte_present(x) (pte_val(x) & _PAGE_PRESENT)
271#define pte_clear(mm, addr, ptep) set_pte_at(mm, addr, ptep, __pte(0))
272
273#define pmd_none(x) (!pmd_val(x))
274#define pmd_bad(x) ((pmd_val(x) & ~PAGE_MASK))
275#define pmd_present(x) (pmd_val(x))
276#define pmd_clear(xp) do { pmd_val(*(xp)) = 0; } while (0)
277
278#define pte_page(x) (mem_map + \
279 (unsigned long)(((pte_val(x) - PAGE_OFFSET) >> PAGE_SHIFT)))
280
281#define mk_pte(page, pgprot) \
282({ \
283 pte_t pte; \
284 pte_val(pte) = __pa(page_address(page)) + pgprot_val(pgprot); \
285 pte; \
286})
287
288
289static inline int pte_file(pte_t pte)
290{
291 return pte_val(pte) & _PAGE_FILE;
292}
293
294#define PTE_FILE_MAX_BITS 30
295#define pgoff_to_pte(x) __pte(x)
296#define pte_to_pgoff(x) (pte_val(x) >> 2)
297#define pte_pfn(pte) (pte_val(pte) >> PAGE_SHIFT)
298#define pfn_pte(pfn, prot) (__pte(((pfn) << PAGE_SHIFT) | pgprot_val(prot)))
299#define __pte_index(addr) (((addr) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
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304
305#define pte_offset(dir, addr) ((pte_t *)(pmd_page_vaddr(*dir)) +\
306 __pte_index(addr))
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308
309#define pte_offset_kernel(dir, addr) pte_offset(dir, addr)
310#define pte_offset_map(dir, addr) pte_offset(dir, addr)
311
312
313#define pte_read(pte) (pte_val(pte) & _PAGE_READ)
314#define pte_write(pte) (pte_val(pte) & _PAGE_WRITE)
315#define pte_dirty(pte) (pte_val(pte) & _PAGE_MODIFIED)
316#define pte_young(pte) (pte_val(pte) & _PAGE_ACCESSED)
317#define pte_special(pte) (0)
318
319#define PTE_BIT_FUNC(fn, op) \
320 static inline pte_t pte_##fn(pte_t pte) { pte_val(pte) op; return pte; }
321
322PTE_BIT_FUNC(wrprotect, &= ~(_PAGE_WRITE));
323PTE_BIT_FUNC(mkwrite, |= (_PAGE_WRITE));
324PTE_BIT_FUNC(mkclean, &= ~(_PAGE_MODIFIED));
325PTE_BIT_FUNC(mkdirty, |= (_PAGE_MODIFIED));
326PTE_BIT_FUNC(mkold, &= ~(_PAGE_ACCESSED));
327PTE_BIT_FUNC(mkyoung, |= (_PAGE_ACCESSED));
328PTE_BIT_FUNC(exprotect, &= ~(_PAGE_EXECUTE));
329PTE_BIT_FUNC(mkexec, |= (_PAGE_EXECUTE));
330
331static inline pte_t pte_mkspecial(pte_t pte) { return pte; }
332
333static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
334{
335 return __pte((pte_val(pte) & _PAGE_CHG_MASK) | pgprot_val(newprot));
336}
337
338
339#define pgprot_noncached(prot) (__pgprot(pgprot_val(prot) & ~_PAGE_CACHEABLE))
340
341static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
342 pte_t *ptep, pte_t pteval)
343{
344 set_pte(ptep, pteval);
345}
346
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349
350#define pgd_offset_k(address) pgd_offset(&init_mm, address)
351#define pgd_index(addr) ((addr) >> PGDIR_SHIFT)
352#define pgd_offset(mm, addr) (((mm)->pgd)+pgd_index(addr))
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367#ifndef CONFIG_SMP
368#define pgd_offset_fast(mm, addr) \
369({ \
370 pgd_t *pgd_base = (pgd_t *) read_aux_reg(ARC_REG_SCRATCH_DATA0); \
371 pgd_base + pgd_index(addr); \
372})
373#else
374#define pgd_offset_fast(mm, addr) pgd_offset(mm, addr)
375#endif
376
377extern void paging_init(void);
378extern pgd_t swapper_pg_dir[] __aligned(PAGE_SIZE);
379void update_mmu_cache(struct vm_area_struct *vma, unsigned long address,
380 pte_t *ptep);
381
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385
386#define __swp_entry(type, off) ((swp_entry_t) { \
387 ((type) & 0x1f) | ((off) << 13) })
388
389
390#define __swp_type(pte_lookalike) (((pte_lookalike).val) & 0x1f)
391#define __swp_offset(pte_lookalike) ((pte_lookalike).val << 13)
392
393
394#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
395#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
396
397#define kern_addr_valid(addr) (1)
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402
403#include <asm-generic/pgtable.h>
404
405
406#define HAVE_ARCH_UNMAPPED_AREA
407
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411#define pgtable_cache_init() do { } while (0)
412
413#endif
414
415#endif
416