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32#ifndef _ASM_ARC_PGTABLE_H
33#define _ASM_ARC_PGTABLE_H
34
35#include <linux/bits.h>
36#define __ARCH_USE_5LEVEL_HACK
37#include <asm-generic/pgtable-nopmd.h>
38#include <asm/page.h>
39#include <asm/mmu.h>
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54
55#if (CONFIG_ARC_MMU_VER <= 2)
56
57#define _PAGE_ACCESSED (1<<1)
58#define _PAGE_CACHEABLE (1<<2)
59#define _PAGE_EXECUTE (1<<3)
60#define _PAGE_WRITE (1<<4)
61#define _PAGE_READ (1<<5)
62#define _PAGE_DIRTY (1<<6)
63#define _PAGE_SPECIAL (1<<7)
64#define _PAGE_GLOBAL (1<<8)
65#define _PAGE_PRESENT (1<<10)
66
67#else
68
69#define _PAGE_CACHEABLE (1<<0)
70#define _PAGE_EXECUTE (1<<1)
71#define _PAGE_WRITE (1<<2)
72#define _PAGE_READ (1<<3)
73#define _PAGE_ACCESSED (1<<4)
74#define _PAGE_DIRTY (1<<5)
75#define _PAGE_SPECIAL (1<<6)
76
77#if (CONFIG_ARC_MMU_VER >= 4)
78#define _PAGE_WTHRU (1<<7)
79#endif
80
81#define _PAGE_GLOBAL (1<<8)
82#define _PAGE_PRESENT (1<<9)
83
84#if (CONFIG_ARC_MMU_VER >= 4)
85#define _PAGE_HW_SZ (1<<10)
86#endif
87
88#define _PAGE_SHARED_CODE (1<<11)
89
90
91#define _PAGE_UNUSED_BIT (1<<12)
92#endif
93
94
95#define _K_PAGE_PERMS (_PAGE_EXECUTE | _PAGE_WRITE | _PAGE_READ | \
96 _PAGE_GLOBAL | _PAGE_PRESENT)
97
98#ifndef CONFIG_ARC_CACHE_PAGES
99#undef _PAGE_CACHEABLE
100#define _PAGE_CACHEABLE 0
101#endif
102
103#ifndef _PAGE_HW_SZ
104#define _PAGE_HW_SZ 0
105#endif
106
107
108#define ___DEF (_PAGE_PRESENT | _PAGE_CACHEABLE)
109
110
111#define _PAGE_CHG_MASK (PAGE_MASK | _PAGE_ACCESSED | _PAGE_DIRTY | _PAGE_SPECIAL)
112
113
114#define PAGE_U_NONE __pgprot(___DEF)
115#define PAGE_U_R __pgprot(___DEF | _PAGE_READ)
116#define PAGE_U_W_R __pgprot(___DEF | _PAGE_READ | _PAGE_WRITE)
117#define PAGE_U_X_R __pgprot(___DEF | _PAGE_READ | _PAGE_EXECUTE)
118#define PAGE_U_X_W_R __pgprot(___DEF | _PAGE_READ | _PAGE_WRITE | \
119 _PAGE_EXECUTE)
120
121#define PAGE_SHARED PAGE_U_W_R
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126
127#define PAGE_KERNEL __pgprot(_K_PAGE_PERMS | _PAGE_CACHEABLE)
128
129
130#define PAGE_KERNEL_NO_CACHE __pgprot(_K_PAGE_PERMS)
131
132
133#define PTE_BITS_IN_PD0 (_PAGE_GLOBAL | _PAGE_PRESENT | _PAGE_HW_SZ)
134#define PTE_BITS_RWX (_PAGE_EXECUTE | _PAGE_WRITE | _PAGE_READ)
135
136#ifdef CONFIG_ARC_HAS_PAE40
137#define PTE_BITS_NON_RWX_IN_PD1 (0xff00000000 | PAGE_MASK | _PAGE_CACHEABLE)
138#else
139#define PTE_BITS_NON_RWX_IN_PD1 (PAGE_MASK | _PAGE_CACHEABLE)
140#endif
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161#define __P000 PAGE_U_NONE
162#define __P001 PAGE_U_R
163#define __P010 PAGE_U_R
164#define __P011 PAGE_U_R
165#define __P100 PAGE_U_X_R
166#define __P101 PAGE_U_X_R
167#define __P110 PAGE_U_X_R
168#define __P111 PAGE_U_X_R
169
170#define __S000 PAGE_U_NONE
171#define __S001 PAGE_U_R
172#define __S010 PAGE_U_W_R
173#define __S011 PAGE_U_W_R
174#define __S100 PAGE_U_X_R
175#define __S101 PAGE_U_X_R
176#define __S110 PAGE_U_X_W_R
177#define __S111 PAGE_U_X_W_R
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203#if defined(CONFIG_ARC_HUGEPAGE_16M)
204#define PGDIR_SHIFT 24
205#elif defined(CONFIG_ARC_HUGEPAGE_2M)
206#define PGDIR_SHIFT 21
207#else
208
209
210
211
212#define PGDIR_SHIFT 21
213#endif
214
215#define BITS_FOR_PTE (PGDIR_SHIFT - PAGE_SHIFT)
216#define BITS_FOR_PGD (32 - PGDIR_SHIFT)
217
218#define PGDIR_SIZE BIT(PGDIR_SHIFT)
219#define PGDIR_MASK (~(PGDIR_SIZE-1))
220
221#define PTRS_PER_PTE BIT(BITS_FOR_PTE)
222#define PTRS_PER_PGD BIT(BITS_FOR_PGD)
223
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227
228#define USER_PTRS_PER_PGD (TASK_SIZE / PGDIR_SIZE)
229
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233
234#define FIRST_USER_ADDRESS 0UL
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240
241#ifndef __ASSEMBLY__
242
243#define pte_ERROR(e) \
244 pr_crit("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, pte_val(e))
245#define pgd_ERROR(e) \
246 pr_crit("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e))
247
248
249extern char empty_zero_page[PAGE_SIZE];
250#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
251
252#define pte_unmap(pte) do { } while (0)
253#define pte_unmap_nested(pte) do { } while (0)
254
255#define set_pte(pteptr, pteval) ((*(pteptr)) = (pteval))
256#define set_pmd(pmdptr, pmdval) (*(pmdptr) = pmdval)
257
258
259#define pmd_page(pmd) virt_to_page(pmd_val(pmd) & PAGE_MASK)
260
261
262#define pmd_page_vaddr(pmd) (pmd_val(pmd) & PAGE_MASK)
263
264
265static inline void pmd_set(pmd_t *pmdp, pte_t *ptep)
266{
267 pmd_val(*pmdp) = (unsigned long)ptep;
268}
269
270#define pte_none(x) (!pte_val(x))
271#define pte_present(x) (pte_val(x) & _PAGE_PRESENT)
272#define pte_clear(mm, addr, ptep) set_pte_at(mm, addr, ptep, __pte(0))
273
274#define pmd_none(x) (!pmd_val(x))
275#define pmd_bad(x) ((pmd_val(x) & ~PAGE_MASK))
276#define pmd_present(x) (pmd_val(x))
277#define pmd_clear(xp) do { pmd_val(*(xp)) = 0; } while (0)
278
279#define pte_page(pte) pfn_to_page(pte_pfn(pte))
280#define mk_pte(page, prot) pfn_pte(page_to_pfn(page), prot)
281#define pfn_pte(pfn, prot) __pte(__pfn_to_phys(pfn) | pgprot_val(prot))
282
283
284#define pte_pfn(pte) (pte_val(pte) >> PAGE_SHIFT)
285#define __pte_index(addr) (((addr) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
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290
291#define pte_offset(dir, addr) ((pte_t *)(pmd_page_vaddr(*dir)) +\
292 __pte_index(addr))
293
294
295#define pte_offset_kernel(dir, addr) pte_offset(dir, addr)
296#define pte_offset_map(dir, addr) pte_offset(dir, addr)
297
298
299#define pte_read(pte) (pte_val(pte) & _PAGE_READ)
300#define pte_write(pte) (pte_val(pte) & _PAGE_WRITE)
301#define pte_dirty(pte) (pte_val(pte) & _PAGE_DIRTY)
302#define pte_young(pte) (pte_val(pte) & _PAGE_ACCESSED)
303#define pte_special(pte) (pte_val(pte) & _PAGE_SPECIAL)
304
305#define PTE_BIT_FUNC(fn, op) \
306 static inline pte_t pte_##fn(pte_t pte) { pte_val(pte) op; return pte; }
307
308PTE_BIT_FUNC(mknotpresent, &= ~(_PAGE_PRESENT));
309PTE_BIT_FUNC(wrprotect, &= ~(_PAGE_WRITE));
310PTE_BIT_FUNC(mkwrite, |= (_PAGE_WRITE));
311PTE_BIT_FUNC(mkclean, &= ~(_PAGE_DIRTY));
312PTE_BIT_FUNC(mkdirty, |= (_PAGE_DIRTY));
313PTE_BIT_FUNC(mkold, &= ~(_PAGE_ACCESSED));
314PTE_BIT_FUNC(mkyoung, |= (_PAGE_ACCESSED));
315PTE_BIT_FUNC(exprotect, &= ~(_PAGE_EXECUTE));
316PTE_BIT_FUNC(mkexec, |= (_PAGE_EXECUTE));
317PTE_BIT_FUNC(mkspecial, |= (_PAGE_SPECIAL));
318PTE_BIT_FUNC(mkhuge, |= (_PAGE_HW_SZ));
319
320static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
321{
322 return __pte((pte_val(pte) & _PAGE_CHG_MASK) | pgprot_val(newprot));
323}
324
325
326#define pgprot_noncached(prot) (__pgprot(pgprot_val(prot) & ~_PAGE_CACHEABLE))
327
328static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
329 pte_t *ptep, pte_t pteval)
330{
331 set_pte(ptep, pteval);
332}
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337#define pgd_offset_k(address) pgd_offset(&init_mm, address)
338#define pgd_index(addr) ((addr) >> PGDIR_SHIFT)
339#define pgd_offset(mm, addr) (((mm)->pgd)+pgd_index(addr))
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354#ifndef CONFIG_SMP
355#define pgd_offset_fast(mm, addr) \
356({ \
357 pgd_t *pgd_base = (pgd_t *) read_aux_reg(ARC_REG_SCRATCH_DATA0); \
358 pgd_base + pgd_index(addr); \
359})
360#else
361#define pgd_offset_fast(mm, addr) pgd_offset(mm, addr)
362#endif
363
364extern pgd_t swapper_pg_dir[] __aligned(PAGE_SIZE);
365void update_mmu_cache(struct vm_area_struct *vma, unsigned long address,
366 pte_t *ptep);
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371
372#define __swp_entry(type, off) ((swp_entry_t) { \
373 ((type) & 0x1f) | ((off) << 13) })
374
375
376#define __swp_type(pte_lookalike) (((pte_lookalike).val) & 0x1f)
377#define __swp_offset(pte_lookalike) ((pte_lookalike).val >> 13)
378
379
380#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
381#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
382
383#define kern_addr_valid(addr) (1)
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389#ifdef CONFIG_TRANSPARENT_HUGEPAGE
390#include <asm/hugepage.h>
391#endif
392
393#include <asm-generic/pgtable.h>
394
395
396#define HAVE_ARCH_UNMAPPED_AREA
397
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399
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401#define pgtable_cache_init() do { } while (0)
402
403#endif
404
405#endif
406