This source file includes following definitions.
- pte_special
- pte_mkspecial
- set_pte
- pmd_page_vaddr
- set_pmd
- pmd_none
- pmd_present
- pmd_clear
- pte_read
- pte_write
- pte_dirty
- pte_young
- pte_wrprotect
- pte_mkclean
- pte_mkold
- pte_mkwrite
- pte_mkdirty
- pte_mkyoung
- pgprot_noncached
- pgprot_writecombine
- pte_modify
- pgd_offset
- pte_offset
1
2
3
4 #ifndef __ASM_CSKY_PGTABLE_H
5 #define __ASM_CSKY_PGTABLE_H
6
7 #include <asm/fixmap.h>
8 #include <asm/addrspace.h>
9 #include <abi/pgtable-bits.h>
10 #include <asm-generic/pgtable-nopmd.h>
11
12 #define PGDIR_SHIFT 22
13 #define PGDIR_SIZE (1UL << PGDIR_SHIFT)
14 #define PGDIR_MASK (~(PGDIR_SIZE-1))
15
16 #define USER_PTRS_PER_PGD (0x80000000UL/PGDIR_SIZE)
17 #define FIRST_USER_ADDRESS 0UL
18
19 #define PKMAP_BASE (0xff800000)
20
21 #define VMALLOC_START (0xc0008000)
22 #define VMALLOC_END (PKMAP_BASE - 2*PAGE_SIZE)
23
24
25
26
27 #define PGD_ORDER 0
28 #define PTE_ORDER 0
29
30 #define PTRS_PER_PGD ((PAGE_SIZE << PGD_ORDER) / sizeof(pgd_t))
31 #define PTRS_PER_PMD 1
32 #define PTRS_PER_PTE ((PAGE_SIZE << PTE_ORDER) / sizeof(pte_t))
33
34 #define pte_ERROR(e) \
35 pr_err("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, (e).pte_low)
36 #define pgd_ERROR(e) \
37 pr_err("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e))
38
39
40 #define __pte_offset_t(address) \
41 (((address) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
42 #define pte_offset_kernel(dir, address) \
43 (pmd_page_vaddr(*(dir)) + __pte_offset_t(address))
44 #define pte_offset_map(dir, address) \
45 ((pte_t *)page_address(pmd_page(*(dir))) + __pte_offset_t(address))
46 #define pmd_page(pmd) (pfn_to_page(pmd_phys(pmd) >> PAGE_SHIFT))
47 #define pte_clear(mm, addr, ptep) set_pte((ptep), \
48 (((unsigned int) addr & PAGE_OFFSET) ? __pte(_PAGE_GLOBAL) : __pte(0)))
49 #define pte_none(pte) (!(pte_val(pte) & ~_PAGE_GLOBAL))
50 #define pte_present(pte) (pte_val(pte) & _PAGE_PRESENT)
51 #define pte_pfn(x) ((unsigned long)((x).pte_low >> PAGE_SHIFT))
52 #define pfn_pte(pfn, prot) __pte(((unsigned long long)(pfn) << PAGE_SHIFT) \
53 | pgprot_val(prot))
54
55 #define __READABLE (_PAGE_READ | _PAGE_VALID | _PAGE_ACCESSED)
56 #define __WRITEABLE (_PAGE_WRITE | _PAGE_DIRTY | _PAGE_MODIFIED)
57
58 #define _PAGE_CHG_MASK (PAGE_MASK | _PAGE_ACCESSED | _PAGE_MODIFIED | \
59 _CACHE_MASK)
60
61 #define pte_unmap(pte) ((void)(pte))
62
63 #define __swp_type(x) (((x).val >> 4) & 0xff)
64 #define __swp_offset(x) ((x).val >> 12)
65 #define __swp_entry(type, offset) ((swp_entry_t) {((type) << 4) | \
66 ((offset) << 12) })
67 #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
68 #define __swp_entry_to_pte(x) ((pte_t) { (x).val })
69
70 #define pte_page(x) pfn_to_page(pte_pfn(x))
71 #define __mk_pte(page_nr, pgprot) __pte(((page_nr) << PAGE_SHIFT) | \
72 pgprot_val(pgprot))
73
74
75
76
77
78
79 #define PAGE_NONE __pgprot(_PAGE_PRESENT | _CACHE_CACHED)
80 #define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_READ | _PAGE_WRITE | \
81 _CACHE_CACHED)
82 #define PAGE_COPY __pgprot(_PAGE_PRESENT | _PAGE_READ | _CACHE_CACHED)
83 #define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_READ | _CACHE_CACHED)
84 #define PAGE_KERNEL __pgprot(_PAGE_PRESENT | __READABLE | __WRITEABLE | \
85 _PAGE_GLOBAL | _CACHE_CACHED)
86 #define PAGE_USERIO __pgprot(_PAGE_PRESENT | _PAGE_READ | _PAGE_WRITE | \
87 _CACHE_CACHED)
88
89 #define __P000 PAGE_NONE
90 #define __P001 PAGE_READONLY
91 #define __P010 PAGE_COPY
92 #define __P011 PAGE_COPY
93 #define __P100 PAGE_READONLY
94 #define __P101 PAGE_READONLY
95 #define __P110 PAGE_COPY
96 #define __P111 PAGE_COPY
97
98 #define __S000 PAGE_NONE
99 #define __S001 PAGE_READONLY
100 #define __S010 PAGE_SHARED
101 #define __S011 PAGE_SHARED
102 #define __S100 PAGE_READONLY
103 #define __S101 PAGE_READONLY
104 #define __S110 PAGE_SHARED
105 #define __S111 PAGE_SHARED
106
107 extern unsigned long empty_zero_page[PAGE_SIZE / sizeof(unsigned long)];
108 #define ZERO_PAGE(vaddr) (virt_to_page(empty_zero_page))
109
110 extern void load_pgd(unsigned long pg_dir);
111 extern pte_t invalid_pte_table[PTRS_PER_PTE];
112
113 static inline int pte_special(pte_t pte) { return 0; }
114 static inline pte_t pte_mkspecial(pte_t pte) { return pte; }
115
116 static inline void set_pte(pte_t *p, pte_t pte)
117 {
118 *p = pte;
119 #if defined(CONFIG_CPU_NEED_TLBSYNC)
120 dcache_wb_line((u32)p);
121 #endif
122
123 smp_mb();
124 }
125 #define set_pte_at(mm, addr, ptep, pteval) set_pte(ptep, pteval)
126
127 static inline pte_t *pmd_page_vaddr(pmd_t pmd)
128 {
129 unsigned long ptr;
130
131 ptr = pmd_val(pmd);
132
133 return __va(ptr);
134 }
135
136 #define pmd_phys(pmd) pmd_val(pmd)
137
138 static inline void set_pmd(pmd_t *p, pmd_t pmd)
139 {
140 *p = pmd;
141 #if defined(CONFIG_CPU_NEED_TLBSYNC)
142 dcache_wb_line((u32)p);
143 #endif
144
145 smp_mb();
146 }
147
148
149 static inline int pmd_none(pmd_t pmd)
150 {
151 return pmd_val(pmd) == __pa(invalid_pte_table);
152 }
153
154 #define pmd_bad(pmd) (pmd_val(pmd) & ~PAGE_MASK)
155
156 static inline int pmd_present(pmd_t pmd)
157 {
158 return (pmd_val(pmd) != __pa(invalid_pte_table));
159 }
160
161 static inline void pmd_clear(pmd_t *p)
162 {
163 pmd_val(*p) = (__pa(invalid_pte_table));
164 #if defined(CONFIG_CPU_NEED_TLBSYNC)
165 dcache_wb_line((u32)p);
166 #endif
167 }
168
169
170
171
172
173 static inline int pte_read(pte_t pte)
174 {
175 return pte.pte_low & _PAGE_READ;
176 }
177
178 static inline int pte_write(pte_t pte)
179 {
180 return (pte).pte_low & _PAGE_WRITE;
181 }
182
183 static inline int pte_dirty(pte_t pte)
184 {
185 return (pte).pte_low & _PAGE_MODIFIED;
186 }
187
188 static inline int pte_young(pte_t pte)
189 {
190 return (pte).pte_low & _PAGE_ACCESSED;
191 }
192
193 static inline pte_t pte_wrprotect(pte_t pte)
194 {
195 pte_val(pte) &= ~(_PAGE_WRITE | _PAGE_DIRTY);
196 return pte;
197 }
198
199 static inline pte_t pte_mkclean(pte_t pte)
200 {
201 pte_val(pte) &= ~(_PAGE_MODIFIED|_PAGE_DIRTY);
202 return pte;
203 }
204
205 static inline pte_t pte_mkold(pte_t pte)
206 {
207 pte_val(pte) &= ~(_PAGE_ACCESSED|_PAGE_VALID);
208 return pte;
209 }
210
211 static inline pte_t pte_mkwrite(pte_t pte)
212 {
213 pte_val(pte) |= _PAGE_WRITE;
214 if (pte_val(pte) & _PAGE_MODIFIED)
215 pte_val(pte) |= _PAGE_DIRTY;
216 return pte;
217 }
218
219 static inline pte_t pte_mkdirty(pte_t pte)
220 {
221 pte_val(pte) |= _PAGE_MODIFIED;
222 if (pte_val(pte) & _PAGE_WRITE)
223 pte_val(pte) |= _PAGE_DIRTY;
224 return pte;
225 }
226
227 static inline pte_t pte_mkyoung(pte_t pte)
228 {
229 pte_val(pte) |= _PAGE_ACCESSED;
230 if (pte_val(pte) & _PAGE_READ)
231 pte_val(pte) |= _PAGE_VALID;
232 return pte;
233 }
234
235 #define __pgd_offset(address) pgd_index(address)
236 #define __pud_offset(address) (((address) >> PUD_SHIFT) & (PTRS_PER_PUD-1))
237 #define __pmd_offset(address) (((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1))
238
239
240 #define pgd_offset_k(address) pgd_offset(&init_mm, address)
241
242 #define pgd_index(address) ((address) >> PGDIR_SHIFT)
243
244 #define __HAVE_PHYS_MEM_ACCESS_PROT
245 struct file;
246 extern pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn,
247 unsigned long size, pgprot_t vma_prot);
248
249
250
251
252
253
254
255 #define pgprot_noncached pgprot_noncached
256
257 static inline pgprot_t pgprot_noncached(pgprot_t _prot)
258 {
259 unsigned long prot = pgprot_val(_prot);
260
261 prot = (prot & ~_CACHE_MASK) | _CACHE_UNCACHED | _PAGE_SO;
262
263 return __pgprot(prot);
264 }
265
266 #define pgprot_writecombine pgprot_writecombine
267 static inline pgprot_t pgprot_writecombine(pgprot_t _prot)
268 {
269 unsigned long prot = pgprot_val(_prot);
270
271 prot = (prot & ~_CACHE_MASK) | _CACHE_UNCACHED;
272
273 return __pgprot(prot);
274 }
275
276
277
278
279
280 #define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot))
281 static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
282 {
283 return __pte((pte_val(pte) & _PAGE_CHG_MASK) |
284 (pgprot_val(newprot)));
285 }
286
287
288 static inline pgd_t *pgd_offset(struct mm_struct *mm, unsigned long address)
289 {
290 return mm->pgd + pgd_index(address);
291 }
292
293
294 static inline pte_t *pte_offset(pmd_t *dir, unsigned long address)
295 {
296 return (pte_t *) (pmd_page_vaddr(*dir)) +
297 ((address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1));
298 }
299
300 extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
301 extern void paging_init(void);
302
303 void update_mmu_cache(struct vm_area_struct *vma, unsigned long address,
304 pte_t *pte);
305
306
307 #define kern_addr_valid(addr) (1)
308
309 #define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \
310 remap_pfn_range(vma, vaddr, pfn, size, prot)
311
312 #include <asm-generic/pgtable.h>
313
314 #endif