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32#ifndef _ASM_ARC_PGTABLE_H
33#define _ASM_ARC_PGTABLE_H
34
35#include <linux/bits.h>
36#include <asm-generic/pgtable-nopmd.h>
37#include <asm/page.h>
38#include <asm/mmu.h>
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53
54#if (CONFIG_ARC_MMU_VER <= 2)
55
56#define _PAGE_ACCESSED (1<<1)
57#define _PAGE_CACHEABLE (1<<2)
58#define _PAGE_EXECUTE (1<<3)
59#define _PAGE_WRITE (1<<4)
60#define _PAGE_READ (1<<5)
61#define _PAGE_DIRTY (1<<6)
62#define _PAGE_SPECIAL (1<<7)
63#define _PAGE_GLOBAL (1<<8)
64#define _PAGE_PRESENT (1<<10)
65
66#else
67
68#define _PAGE_CACHEABLE (1<<0)
69#define _PAGE_EXECUTE (1<<1)
70#define _PAGE_WRITE (1<<2)
71#define _PAGE_READ (1<<3)
72#define _PAGE_ACCESSED (1<<4)
73#define _PAGE_DIRTY (1<<5)
74#define _PAGE_SPECIAL (1<<6)
75
76#if (CONFIG_ARC_MMU_VER >= 4)
77#define _PAGE_WTHRU (1<<7)
78#endif
79
80#define _PAGE_GLOBAL (1<<8)
81#define _PAGE_PRESENT (1<<9)
82
83#if (CONFIG_ARC_MMU_VER >= 4)
84#define _PAGE_HW_SZ (1<<10)
85#endif
86
87#define _PAGE_SHARED_CODE (1<<11)
88
89
90#define _PAGE_UNUSED_BIT (1<<12)
91#endif
92
93
94#define _K_PAGE_PERMS (_PAGE_EXECUTE | _PAGE_WRITE | _PAGE_READ | \
95 _PAGE_GLOBAL | _PAGE_PRESENT)
96
97#ifndef CONFIG_ARC_CACHE_PAGES
98#undef _PAGE_CACHEABLE
99#define _PAGE_CACHEABLE 0
100#endif
101
102#ifndef _PAGE_HW_SZ
103#define _PAGE_HW_SZ 0
104#endif
105
106
107#define ___DEF (_PAGE_PRESENT | _PAGE_CACHEABLE)
108
109
110#define _PAGE_CHG_MASK (PAGE_MASK_PHYS | _PAGE_ACCESSED | _PAGE_DIRTY | \
111 _PAGE_SPECIAL)
112
113#define PAGE_U_NONE __pgprot(___DEF)
114#define PAGE_U_R __pgprot(___DEF | _PAGE_READ)
115#define PAGE_U_W_R __pgprot(___DEF | _PAGE_READ | _PAGE_WRITE)
116#define PAGE_U_X_R __pgprot(___DEF | _PAGE_READ | _PAGE_EXECUTE)
117#define PAGE_U_X_W_R __pgprot(___DEF | _PAGE_READ | _PAGE_WRITE | \
118 _PAGE_EXECUTE)
119
120#define PAGE_SHARED PAGE_U_W_R
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125
126#define PAGE_KERNEL __pgprot(_K_PAGE_PERMS | _PAGE_CACHEABLE)
127
128
129#define PAGE_KERNEL_NO_CACHE __pgprot(_K_PAGE_PERMS)
130
131
132#define PTE_BITS_IN_PD0 (_PAGE_GLOBAL | _PAGE_PRESENT | _PAGE_HW_SZ)
133#define PTE_BITS_RWX (_PAGE_EXECUTE | _PAGE_WRITE | _PAGE_READ)
134
135#define PTE_BITS_NON_RWX_IN_PD1 (PAGE_MASK_PHYS | _PAGE_CACHEABLE)
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156#define __P000 PAGE_U_NONE
157#define __P001 PAGE_U_R
158#define __P010 PAGE_U_R
159#define __P011 PAGE_U_R
160#define __P100 PAGE_U_X_R
161#define __P101 PAGE_U_X_R
162#define __P110 PAGE_U_X_R
163#define __P111 PAGE_U_X_R
164
165#define __S000 PAGE_U_NONE
166#define __S001 PAGE_U_R
167#define __S010 PAGE_U_W_R
168#define __S011 PAGE_U_W_R
169#define __S100 PAGE_U_X_R
170#define __S101 PAGE_U_X_R
171#define __S110 PAGE_U_X_W_R
172#define __S111 PAGE_U_X_W_R
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198#if defined(CONFIG_ARC_HUGEPAGE_16M)
199#define PGDIR_SHIFT 24
200#elif defined(CONFIG_ARC_HUGEPAGE_2M)
201#define PGDIR_SHIFT 21
202#else
203
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205
206
207#define PGDIR_SHIFT 21
208#endif
209
210#define BITS_FOR_PTE (PGDIR_SHIFT - PAGE_SHIFT)
211#define BITS_FOR_PGD (32 - PGDIR_SHIFT)
212
213#define PGDIR_SIZE BIT(PGDIR_SHIFT)
214#define PGDIR_MASK (~(PGDIR_SIZE-1))
215
216#define PTRS_PER_PTE BIT(BITS_FOR_PTE)
217#define PTRS_PER_PGD BIT(BITS_FOR_PGD)
218
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223#define USER_PTRS_PER_PGD (TASK_SIZE / PGDIR_SIZE)
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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 set_pte(pteptr, pteval) ((*(pteptr)) = (pteval))
242#define set_pmd(pmdptr, pmdval) (*(pmdptr) = pmdval)
243
244
245#define pmd_page(pmd) virt_to_page(pmd_val(pmd) & PAGE_MASK)
246
247
248#define pmd_page_vaddr(pmd) (pmd_val(pmd) & PAGE_MASK)
249
250
251static inline void pmd_set(pmd_t *pmdp, pte_t *ptep)
252{
253 pmd_val(*pmdp) = (unsigned long)ptep;
254}
255
256#define pte_none(x) (!pte_val(x))
257#define pte_present(x) (pte_val(x) & _PAGE_PRESENT)
258#define pte_clear(mm, addr, ptep) set_pte_at(mm, addr, ptep, __pte(0))
259
260#define pmd_none(x) (!pmd_val(x))
261#define pmd_bad(x) ((pmd_val(x) & ~PAGE_MASK))
262#define pmd_present(x) (pmd_val(x))
263#define pmd_leaf(x) (pmd_val(x) & _PAGE_HW_SZ)
264#define pmd_clear(xp) do { pmd_val(*(xp)) = 0; } while (0)
265
266#define pte_page(pte) pfn_to_page(pte_pfn(pte))
267#define mk_pte(page, prot) pfn_pte(page_to_pfn(page), prot)
268#define pfn_pte(pfn, prot) __pte(__pfn_to_phys(pfn) | pgprot_val(prot))
269
270
271#define pte_pfn(pte) (pte_val(pte) >> PAGE_SHIFT)
272
273
274#define pte_read(pte) (pte_val(pte) & _PAGE_READ)
275#define pte_write(pte) (pte_val(pte) & _PAGE_WRITE)
276#define pte_dirty(pte) (pte_val(pte) & _PAGE_DIRTY)
277#define pte_young(pte) (pte_val(pte) & _PAGE_ACCESSED)
278#define pte_special(pte) (pte_val(pte) & _PAGE_SPECIAL)
279
280#define PTE_BIT_FUNC(fn, op) \
281 static inline pte_t pte_##fn(pte_t pte) { pte_val(pte) op; return pte; }
282
283PTE_BIT_FUNC(mknotpresent, &= ~(_PAGE_PRESENT));
284PTE_BIT_FUNC(wrprotect, &= ~(_PAGE_WRITE));
285PTE_BIT_FUNC(mkwrite, |= (_PAGE_WRITE));
286PTE_BIT_FUNC(mkclean, &= ~(_PAGE_DIRTY));
287PTE_BIT_FUNC(mkdirty, |= (_PAGE_DIRTY));
288PTE_BIT_FUNC(mkold, &= ~(_PAGE_ACCESSED));
289PTE_BIT_FUNC(mkyoung, |= (_PAGE_ACCESSED));
290PTE_BIT_FUNC(exprotect, &= ~(_PAGE_EXECUTE));
291PTE_BIT_FUNC(mkexec, |= (_PAGE_EXECUTE));
292PTE_BIT_FUNC(mkspecial, |= (_PAGE_SPECIAL));
293PTE_BIT_FUNC(mkhuge, |= (_PAGE_HW_SZ));
294
295static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
296{
297 return __pte((pte_val(pte) & _PAGE_CHG_MASK) | pgprot_val(newprot));
298}
299
300
301#define pgprot_noncached(prot) (__pgprot(pgprot_val(prot) & ~_PAGE_CACHEABLE))
302
303static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
304 pte_t *ptep, pte_t pteval)
305{
306 set_pte(ptep, pteval);
307}
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321
322#ifdef ARC_USE_SCRATCH_REG
323#define pgd_offset_fast(mm, addr) \
324({ \
325 pgd_t *pgd_base = (pgd_t *) read_aux_reg(ARC_REG_SCRATCH_DATA0); \
326 pgd_base + pgd_index(addr); \
327})
328#else
329#define pgd_offset_fast(mm, addr) pgd_offset(mm, addr)
330#endif
331
332extern pgd_t swapper_pg_dir[] __aligned(PAGE_SIZE);
333void update_mmu_cache(struct vm_area_struct *vma, unsigned long address,
334 pte_t *ptep);
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339
340#define __swp_entry(type, off) ((swp_entry_t) { \
341 ((type) & 0x1f) | ((off) << 13) })
342
343
344#define __swp_type(pte_lookalike) (((pte_lookalike).val) & 0x1f)
345#define __swp_offset(pte_lookalike) ((pte_lookalike).val >> 13)
346
347
348#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
349#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
350
351#define kern_addr_valid(addr) (1)
352
353#define pmd_pgtable(pmd) ((pgtable_t) pmd_page_vaddr(pmd))
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358
359#ifdef CONFIG_TRANSPARENT_HUGEPAGE
360#include <asm/hugepage.h>
361#endif
362
363
364#define HAVE_ARCH_UNMAPPED_AREA
365
366#endif
367
368#endif
369