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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>
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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_EXECUTE (1<<3)
61#define _PAGE_WRITE (1<<4)
62#define _PAGE_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_EXECUTE (1<<1)
76#define _PAGE_WRITE (1<<2)
77#define _PAGE_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
98#ifdef CONFIG_ARC_CACHE_PAGES
99#define _PAGE_DEF_CACHEABLE _PAGE_CACHEABLE
100#else
101#define _PAGE_DEF_CACHEABLE (0)
102#endif
103
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107
108
109#define ___DEF (_PAGE_PRESENT | _K_PAGE_PERMS | _PAGE_DEF_CACHEABLE)
110
111
112#define _PAGE_CHG_MASK (PAGE_MASK | _PAGE_ACCESSED | _PAGE_MODIFIED)
113
114
115#define PAGE_U_NONE __pgprot(___DEF)
116#define PAGE_U_R __pgprot(___DEF | _PAGE_READ)
117#define PAGE_U_W_R __pgprot(___DEF | _PAGE_READ | _PAGE_WRITE)
118#define PAGE_U_X_R __pgprot(___DEF | _PAGE_READ | _PAGE_EXECUTE)
119#define PAGE_U_X_W_R __pgprot(___DEF | _PAGE_READ | _PAGE_WRITE | \
120 _PAGE_EXECUTE)
121
122#define PAGE_SHARED PAGE_U_W_R
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127
128#define PAGE_KERNEL __pgprot(___DEF | _PAGE_GLOBAL)
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131#define PAGE_KERNEL_NO_CACHE __pgprot(_PAGE_PRESENT | _K_PAGE_PERMS | \
132 _PAGE_GLOBAL)
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153#define __P000 PAGE_U_NONE
154#define __P001 PAGE_U_R
155#define __P010 PAGE_U_R
156#define __P011 PAGE_U_R
157#define __P100 PAGE_U_X_R
158#define __P101 PAGE_U_X_R
159#define __P110 PAGE_U_X_R
160#define __P111 PAGE_U_X_R
161
162#define __S000 PAGE_U_NONE
163#define __S001 PAGE_U_R
164#define __S010 PAGE_U_W_R
165#define __S011 PAGE_U_W_R
166#define __S100 PAGE_U_X_R
167#define __S101 PAGE_U_X_R
168#define __S110 PAGE_U_X_W_R
169#define __S111 PAGE_U_X_W_R
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188
189#define BITS_IN_PAGE PAGE_SHIFT
190
191
192#if defined(CONFIG_ARC_PAGE_SIZE_8K)
193#define BITS_FOR_PTE 8
194#elif defined(CONFIG_ARC_PAGE_SIZE_16K)
195#define BITS_FOR_PTE 8
196#elif defined(CONFIG_ARC_PAGE_SIZE_4K)
197#define BITS_FOR_PTE 9
198#endif
199
200#define BITS_FOR_PGD (32 - BITS_FOR_PTE - BITS_IN_PAGE)
201
202#define PGDIR_SHIFT (BITS_FOR_PTE + BITS_IN_PAGE)
203#define PGDIR_SIZE (1UL << PGDIR_SHIFT)
204#define PGDIR_MASK (~(PGDIR_SIZE-1))
205
206#ifdef __ASSEMBLY__
207#define PTRS_PER_PTE (1 << BITS_FOR_PTE)
208#define PTRS_PER_PGD (1 << BITS_FOR_PGD)
209#else
210#define PTRS_PER_PTE (1UL << BITS_FOR_PTE)
211#define PTRS_PER_PGD (1UL << BITS_FOR_PGD)
212#endif
213
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216
217#define USER_PTRS_PER_PGD (TASK_SIZE / PGDIR_SIZE)
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222
223#define FIRST_USER_ADDRESS 0
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228
229
230#ifndef __ASSEMBLY__
231
232#define pte_ERROR(e) \
233 pr_crit("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, pte_val(e))
234#define pgd_ERROR(e) \
235 pr_crit("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e))
236
237
238extern char empty_zero_page[PAGE_SIZE];
239#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
240
241#define pte_unmap(pte) do { } while (0)
242#define pte_unmap_nested(pte) do { } while (0)
243
244#define set_pte(pteptr, pteval) ((*(pteptr)) = (pteval))
245#define set_pmd(pmdptr, pmdval) (*(pmdptr) = pmdval)
246
247
248#define pmd_page(pmd) virt_to_page(pmd_val(pmd) & PAGE_MASK)
249
250
251#define pmd_page_vaddr(pmd) (pmd_val(pmd) & PAGE_MASK)
252
253
254static inline void pmd_set(pmd_t *pmdp, pte_t *ptep)
255{
256 pmd_val(*pmdp) = (unsigned long)ptep;
257}
258
259#define pte_none(x) (!pte_val(x))
260#define pte_present(x) (pte_val(x) & _PAGE_PRESENT)
261#define pte_clear(mm, addr, ptep) set_pte_at(mm, addr, ptep, __pte(0))
262
263#define pmd_none(x) (!pmd_val(x))
264#define pmd_bad(x) ((pmd_val(x) & ~PAGE_MASK))
265#define pmd_present(x) (pmd_val(x))
266#define pmd_clear(xp) do { pmd_val(*(xp)) = 0; } while (0)
267
268#define pte_page(x) (mem_map + \
269 (unsigned long)(((pte_val(x) - PAGE_OFFSET) >> PAGE_SHIFT)))
270
271#define mk_pte(page, pgprot) \
272({ \
273 pte_t pte; \
274 pte_val(pte) = __pa(page_address(page)) + pgprot_val(pgprot); \
275 pte; \
276})
277
278
279static inline int pte_file(pte_t pte)
280{
281 return pte_val(pte) & _PAGE_FILE;
282}
283
284#define PTE_FILE_MAX_BITS 30
285#define pgoff_to_pte(x) __pte(x)
286#define pte_to_pgoff(x) (pte_val(x) >> 2)
287#define pte_pfn(pte) (pte_val(pte) >> PAGE_SHIFT)
288#define pfn_pte(pfn, prot) (__pte(((pfn) << PAGE_SHIFT) | pgprot_val(prot)))
289#define __pte_index(addr) (((addr) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
290
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293
294
295#define pte_offset(dir, addr) ((pte_t *)(pmd_page_vaddr(*dir)) +\
296 __pte_index(addr))
297
298
299#define pte_offset_kernel(dir, addr) pte_offset(dir, addr)
300#define pte_offset_map(dir, addr) pte_offset(dir, addr)
301
302
303#define pte_read(pte) (pte_val(pte) & _PAGE_READ)
304#define pte_write(pte) (pte_val(pte) & _PAGE_WRITE)
305#define pte_dirty(pte) (pte_val(pte) & _PAGE_MODIFIED)
306#define pte_young(pte) (pte_val(pte) & _PAGE_ACCESSED)
307#define pte_special(pte) (0)
308
309#define PTE_BIT_FUNC(fn, op) \
310 static inline pte_t pte_##fn(pte_t pte) { pte_val(pte) op; return pte; }
311
312PTE_BIT_FUNC(wrprotect, &= ~(_PAGE_WRITE));
313PTE_BIT_FUNC(mkwrite, |= (_PAGE_WRITE));
314PTE_BIT_FUNC(mkclean, &= ~(_PAGE_MODIFIED));
315PTE_BIT_FUNC(mkdirty, |= (_PAGE_MODIFIED));
316PTE_BIT_FUNC(mkold, &= ~(_PAGE_ACCESSED));
317PTE_BIT_FUNC(mkyoung, |= (_PAGE_ACCESSED));
318PTE_BIT_FUNC(exprotect, &= ~(_PAGE_EXECUTE));
319PTE_BIT_FUNC(mkexec, |= (_PAGE_EXECUTE));
320
321static inline pte_t pte_mkspecial(pte_t pte) { return pte; }
322
323static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
324{
325 return __pte((pte_val(pte) & _PAGE_CHG_MASK) | pgprot_val(newprot));
326}
327
328
329#define pgprot_noncached(prot) (__pgprot(pgprot_val(prot) & ~_PAGE_CACHEABLE))
330
331static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
332 pte_t *ptep, pte_t pteval)
333{
334 set_pte(ptep, pteval);
335}
336
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339
340#define pgd_offset_k(address) pgd_offset(&init_mm, address)
341#define pgd_index(addr) ((addr) >> PGDIR_SHIFT)
342#define pgd_offset(mm, addr) (((mm)->pgd)+pgd_index(addr))
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357#ifndef CONFIG_SMP
358#define pgd_offset_fast(mm, addr) \
359({ \
360 pgd_t *pgd_base = (pgd_t *) read_aux_reg(ARC_REG_SCRATCH_DATA0); \
361 pgd_base + pgd_index(addr); \
362})
363#else
364#define pgd_offset_fast(mm, addr) pgd_offset(mm, addr)
365#endif
366
367extern void paging_init(void);
368extern pgd_t swapper_pg_dir[] __aligned(PAGE_SIZE);
369void update_mmu_cache(struct vm_area_struct *vma, unsigned long address,
370 pte_t *ptep);
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374
375
376#define __swp_entry(type, off) ((swp_entry_t) { \
377 ((type) & 0x1f) | ((off) << 13) })
378
379
380#define __swp_type(pte_lookalike) (((pte_lookalike).val) & 0x1f)
381#define __swp_offset(pte_lookalike) ((pte_lookalike).val << 13)
382
383
384#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
385#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
386
387#define kern_addr_valid(addr) (1)
388
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393#define io_remap_pfn_range(vma, from, pfn, size, prot) \
394 remap_pfn_range(vma, from, pfn, size, prot)
395
396#include <asm-generic/pgtable.h>
397
398
399
400
401#define pgtable_cache_init() do { } while (0)
402
403#endif
404
405#endif
406