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6#ifndef _CRIS_PGTABLE_H
7#define _CRIS_PGTABLE_H
8
9#include <asm/page.h>
10#define __ARCH_USE_5LEVEL_HACK
11#include <asm-generic/pgtable-nopmd.h>
12
13#ifndef __ASSEMBLY__
14#include <linux/sched/mm.h>
15#include <asm/mmu.h>
16#endif
17#include <arch/pgtable.h>
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27
28
29
30#ifndef __ASSEMBLY__
31extern void paging_init(void);
32#endif
33
34
35
36
37
38#define set_pte(pteptr, pteval) ((*(pteptr)) = (pteval))
39#define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval)
40
41
42
43
44
45#define set_pmd(pmdptr, pmdval) (*(pmdptr) = pmdval)
46#define set_pgu(pudptr, pudval) (*(pudptr) = pudval)
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50
51
52
53#define PGDIR_SHIFT (PAGE_SHIFT + (PAGE_SHIFT-2))
54#define PGDIR_SIZE (1UL << PGDIR_SHIFT)
55#define PGDIR_MASK (~(PGDIR_SIZE-1))
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60
61
62
63#define PTRS_PER_PTE (1UL << (PAGE_SHIFT-2))
64#define PTRS_PER_PGD (1UL << (PAGE_SHIFT-2))
65
66
67
68
69
70
71#define USER_PTRS_PER_PGD (TASK_SIZE/PGDIR_SIZE)
72#define FIRST_USER_ADDRESS 0UL
73
74
75#ifndef __ASSEMBLY__
76extern unsigned long empty_zero_page;
77#define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
78#endif
79
80
81#define BITS_PER_PTR (8*sizeof(unsigned long))
82
83
84#define PTR_MASK (~(sizeof(void*)-1))
85
86
87
88#define SIZEOF_PTR_LOG2 2
89
90
91#define PAGE_PTR(address) \
92((unsigned long)(address)>>(PAGE_SHIFT-SIZEOF_PTR_LOG2)&PTR_MASK&~PAGE_MASK)
93
94
95#define SET_PAGE_DIR(tsk,pgdir)
96
97#define pte_none(x) (!pte_val(x))
98#define pte_present(x) (pte_val(x) & _PAGE_PRESENT)
99#define pte_clear(mm,addr,xp) do { pte_val(*(xp)) = 0; } while (0)
100
101#define pmd_none(x) (!pmd_val(x))
102
103
104
105#define pmd_bad(x) ((pmd_val(x) & (~PAGE_MASK & ~_PAGE_KERNEL)) != _PAGE_TABLE)
106#define pmd_present(x) (pmd_val(x) & _PAGE_PRESENT)
107#define pmd_clear(xp) do { pmd_val(*(xp)) = 0; } while (0)
108
109#ifndef __ASSEMBLY__
110
111
112
113
114
115
116static inline int pte_write(pte_t pte) { return pte_val(pte) & _PAGE_WRITE; }
117static inline int pte_dirty(pte_t pte) { return pte_val(pte) & _PAGE_MODIFIED; }
118static inline int pte_young(pte_t pte) { return pte_val(pte) & _PAGE_ACCESSED; }
119static inline int pte_special(pte_t pte) { return 0; }
120
121static inline pte_t pte_wrprotect(pte_t pte)
122{
123 pte_val(pte) &= ~(_PAGE_WRITE | _PAGE_SILENT_WRITE);
124 return pte;
125}
126
127static inline pte_t pte_mkclean(pte_t pte)
128{
129 pte_val(pte) &= ~(_PAGE_MODIFIED | _PAGE_SILENT_WRITE);
130 return pte;
131}
132
133static inline pte_t pte_mkold(pte_t pte)
134{
135 pte_val(pte) &= ~(_PAGE_ACCESSED | _PAGE_SILENT_READ);
136 return pte;
137}
138
139static inline pte_t pte_mkwrite(pte_t pte)
140{
141 pte_val(pte) |= _PAGE_WRITE;
142 if (pte_val(pte) & _PAGE_MODIFIED)
143 pte_val(pte) |= _PAGE_SILENT_WRITE;
144 return pte;
145}
146
147static inline pte_t pte_mkdirty(pte_t pte)
148{
149 pte_val(pte) |= _PAGE_MODIFIED;
150 if (pte_val(pte) & _PAGE_WRITE)
151 pte_val(pte) |= _PAGE_SILENT_WRITE;
152 return pte;
153}
154
155static inline pte_t pte_mkyoung(pte_t pte)
156{
157 pte_val(pte) |= _PAGE_ACCESSED;
158 if (pte_val(pte) & _PAGE_READ)
159 {
160 pte_val(pte) |= _PAGE_SILENT_READ;
161 if ((pte_val(pte) & (_PAGE_WRITE | _PAGE_MODIFIED)) ==
162 (_PAGE_WRITE | _PAGE_MODIFIED))
163 pte_val(pte) |= _PAGE_SILENT_WRITE;
164 }
165 return pte;
166}
167static inline pte_t pte_mkspecial(pte_t pte) { return pte; }
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179
180static inline pte_t __mk_pte(void * page, pgprot_t pgprot)
181{
182 pte_t pte;
183
184 pte_val(pte) = __pa(page) | pgprot_val(pgprot);
185 return pte;
186}
187
188#define mk_pte(page, pgprot) __mk_pte(page_address(page), (pgprot))
189
190#define mk_pte_phys(physpage, pgprot) \
191({ \
192 pte_t __pte; \
193 \
194 pte_val(__pte) = (physpage) + pgprot_val(pgprot); \
195 __pte; \
196})
197
198static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
199{ pte_val(pte) = (pte_val(pte) & _PAGE_CHG_MASK) | pgprot_val(newprot); return pte; }
200
201#define pgprot_noncached(prot) __pgprot((pgprot_val(prot) | _PAGE_NO_CACHE))
202
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207
208
209static inline unsigned long __pte_page(pte_t pte)
210{
211
212 return (unsigned long)__va(pte_val(pte) & PAGE_MASK);
213}
214
215#define pte_pagenr(pte) ((__pte_page(pte) - PAGE_OFFSET) >> PAGE_SHIFT)
216
217
218
219#define __page_address(page) (PAGE_OFFSET + (((page) - mem_map) << PAGE_SHIFT))
220#define pte_page(pte) (mem_map+pte_pagenr(pte))
221
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225
226
227static inline void pmd_set(pmd_t * pmdp, pte_t * ptep)
228{ pmd_val(*pmdp) = _PAGE_TABLE | (unsigned long) ptep; }
229
230#define pmd_page(pmd) (pfn_to_page(pmd_val(pmd) >> PAGE_SHIFT))
231#define pmd_page_vaddr(pmd) ((unsigned long) __va(pmd_val(pmd) & PAGE_MASK))
232
233
234#define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD-1))
235
236
237static inline pgd_t * pgd_offset(const struct mm_struct *mm, unsigned long address)
238{
239 return mm->pgd + pgd_index(address);
240}
241
242
243#define pgd_offset_k(address) pgd_offset(&init_mm, address)
244
245
246#define __pte_offset(address) \
247 (((address) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
248#define pte_offset_kernel(dir, address) \
249 ((pte_t *) pmd_page_vaddr(*(dir)) + __pte_offset(address))
250#define pte_offset_map(dir, address) \
251 ((pte_t *)page_address(pmd_page(*(dir))) + __pte_offset(address))
252
253#define pte_unmap(pte) do { } while (0)
254#define pte_pfn(x) ((unsigned long)(__va((x).pte)) >> PAGE_SHIFT)
255#define pfn_pte(pfn, prot) __pte(((pfn) << PAGE_SHIFT) | pgprot_val(prot))
256
257#define pte_ERROR(e) \
258 printk("%s:%d: bad pte %p(%08lx).\n", __FILE__, __LINE__, &(e), pte_val(e))
259#define pgd_ERROR(e) \
260 printk("%s:%d: bad pgd %p(%08lx).\n", __FILE__, __LINE__, &(e), pgd_val(e))
261
262
263extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
264
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270
271static inline void update_mmu_cache(struct vm_area_struct * vma,
272 unsigned long address, pte_t *ptep)
273{
274}
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278
279#define __swp_type(x) (((x).val >> 5) & 0x7f)
280#define __swp_offset(x) ((x).val >> 12)
281#define __swp_entry(type, offset) ((swp_entry_t) { ((type) << 5) | ((offset) << 12) })
282#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
283#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
284
285#define kern_addr_valid(addr) (1)
286
287#include <asm-generic/pgtable.h>
288
289
290
291
292#define pgtable_cache_init() do { } while (0)
293
294typedef pte_t *pte_addr_t;
295
296#endif
297#endif
298