This source file includes following definitions.
- mk_pte
- pte_modify
- pgd_set
- pte_page
- pgd_page
- pte_none
- pte_present
- pte_clear
- pgd_none
- pgd_bad
- pgd_present
- pgd_clear
- pte_read
- pte_write
- pte_exec
- pte_dirty
- pte_young
- pte_cow
- pte_wrprotect
- pte_rdprotect
- pte_exprotect
- pte_mkclean
- pte_mkold
- pte_uncow
- pte_mkwrite
- pte_mkread
- pte_mkexec
- pte_mkdirty
- pte_mkyoung
- pte_mkcow
1 #ifndef _ALPHA_PAGE_H
2 #define _ALPHA_PAGE_H
3
4 #define CONFIG_STRICT_MM_TYPECHECKS
5
6 #define invalidate_all() \
7 __asm__ __volatile__( \
8 "lda $16,-2($31)\n\t" \
9 ".long 51" \
10 : : :"$1", "$16", "$17", "$22","$23","$24","$25")
11
12 #define invalidate() \
13 __asm__ __volatile__( \
14 "lda $16,-1($31)\n\t" \
15 ".long 51" \
16 : : :"$1", "$16", "$17", "$22","$23","$24","$25")
17
18
19 #define PAGE_SHIFT 13
20 #define PGDIR_SHIFT 23
21 #define PAGE_SIZE (1UL << PAGE_SHIFT)
22 #define PGDIR_SIZE (1UL << PGDIR_SHIFT)
23
24 #ifdef __KERNEL__
25
26 #define PAGE_OFFSET 0xFFFFFC0000000000
27 #define MAP_NR(addr) (((addr) - PAGE_OFFSET) >> PAGE_SHIFT)
28 #define MAP_PAGE_RESERVED (1<<31)
29
30 typedef unsigned int mem_map_t;
31
32 #ifdef CONFIG_STRICT_MM_TYPECHECKS
33
34
35
36 typedef struct { unsigned long pte; } pte_t;
37 typedef struct { unsigned long pgd; } pgd_t;
38 typedef struct { unsigned long pgprot; } pgprot_t;
39
40 #define pte_val(x) ((x).pte)
41 #define pgd_val(x) ((x).pgd)
42 #define pgprot_val(x) ((x).pgprot)
43
44 #define __pte(x) ((pte_t) { (x) } )
45 #define __pgd(x) ((pgd_t) { (x) } )
46 #define __pgprot(x) ((pgprot_t) { (x) } )
47
48 #else
49
50
51
52 typedef unsigned long pte_t;
53 typedef unsigned long pgd_t;
54 typedef unsigned long pgprot_t;
55
56 #define pte_val(x) (x)
57 #define pgd_val(x) (x)
58 #define pgprot_val(x) (x)
59
60 #define __pte(x) (x)
61 #define __pgd(x) (x)
62 #define __pgprot(x) (x)
63
64 #endif
65
66
67
68
69 #define _PAGE_VALID 0x0001
70 #define _PAGE_FOR 0x0002
71 #define _PAGE_FOW 0x0004
72 #define _PAGE_FOE 0x0008
73 #define _PAGE_ASM 0x0010
74 #define _PAGE_KRE 0x0100
75 #define _PAGE_URE 0x0200
76 #define _PAGE_KWE 0x1000
77 #define _PAGE_UWE 0x2000
78
79
80 #define _PAGE_COW 0x10000
81 #define _PAGE_DIRTY 0x20000
82 #define _PAGE_ACCESSED 0x40000
83
84
85
86
87
88
89
90
91
92
93
94
95 #define __DIRTY_BITS (_PAGE_DIRTY | _PAGE_KWE | _PAGE_UWE)
96 #define __ACCESS_BITS (_PAGE_ACCESSED | _PAGE_KRE | _PAGE_URE)
97
98 #define _PFN_MASK 0xFFFFFFFF00000000
99
100 #define _PAGE_TABLE (_PAGE_VALID | __DIRTY_BITS | __ACCESS_BITS)
101 #define _PAGE_CHG_MASK (_PFN_MASK | __DIRTY_BITS | __ACCESS_BITS)
102
103
104
105
106
107 #define PAGE_NONE __pgprot(_PAGE_VALID | __ACCESS_BITS | _PAGE_FOR | _PAGE_FOW | _PAGE_FOE)
108 #define PAGE_SHARED __pgprot(_PAGE_VALID | __ACCESS_BITS)
109 #define PAGE_COPY __pgprot(_PAGE_VALID | __ACCESS_BITS | _PAGE_FOW | _PAGE_COW)
110 #define PAGE_READONLY __pgprot(_PAGE_VALID | __ACCESS_BITS | _PAGE_FOW)
111 #define PAGE_KERNEL __pgprot(_PAGE_VALID | _PAGE_ASM | __ACCESS_BITS | __DIRTY_BITS)
112
113 #define _PAGE_NORMAL(x) __pgprot(_PAGE_VALID | __ACCESS_BITS | (x))
114
115 #define __P000 _PAGE_NORMAL(_PAGE_COW | _PAGE_FOR | _PAGE_FOW | _PAGE_FOE)
116 #define __P001 _PAGE_NORMAL(_PAGE_COW | _PAGE_FOW | _PAGE_FOE)
117 #define __P010 _PAGE_NORMAL(_PAGE_COW | _PAGE_FOR | _PAGE_FOE)
118 #define __P011 _PAGE_NORMAL(_PAGE_COW | _PAGE_FOE)
119 #define __P100 _PAGE_NORMAL(_PAGE_COW | _PAGE_FOR | _PAGE_FOW)
120 #define __P101 _PAGE_NORMAL(_PAGE_COW | _PAGE_FOW)
121 #define __P110 _PAGE_NORMAL(_PAGE_COW | _PAGE_FOR)
122 #define __P111 _PAGE_NORMAL(_PAGE_COW)
123
124 #define __S000 _PAGE_NORMAL(_PAGE_FOR | _PAGE_FOW | _PAGE_FOE)
125 #define __S001 _PAGE_NORMAL(_PAGE_FOW | _PAGE_FOE)
126 #define __S010 _PAGE_NORMAL(_PAGE_FOR | _PAGE_FOE)
127 #define __S011 _PAGE_NORMAL(_PAGE_FOE)
128 #define __S100 _PAGE_NORMAL(_PAGE_FOR | _PAGE_FOW)
129 #define __S101 _PAGE_NORMAL(_PAGE_FOW)
130 #define __S110 _PAGE_NORMAL(_PAGE_FOR)
131 #define __S111 _PAGE_NORMAL(0)
132
133
134
135
136
137
138
139
140 extern pte_t __bad_page(void);
141 extern pte_t * __bad_pagetable(void);
142
143 extern unsigned long __zero_page(void);
144
145 #define BAD_PAGETABLE __bad_pagetable()
146 #define BAD_PAGE __bad_page()
147 #define ZERO_PAGE __zero_page()
148
149
150 #define BITS_PER_PTR (8*sizeof(unsigned long))
151
152
153 #define PAGE_MASK (~(PAGE_SIZE-1))
154
155
156 #define PGDIR_MASK (~(PGDIR_SIZE-1))
157
158
159 #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
160
161
162 #define PTR_MASK (~(sizeof(void*)-1))
163
164
165 #define SIZEOF_PTR_LOG2 3
166
167
168
169
170
171
172 #define PAGE_DIR_OFFSET(tsk,address) \
173 ((pgd_t *) ((tsk)->tss.ptbr + ((((unsigned long)(address)) >> 21) & PTR_MASK & ~PAGE_MASK)))
174
175
176 #define PAGE_PTR(address) \
177 ((unsigned long)(address)>>(PAGE_SHIFT-SIZEOF_PTR_LOG2)&PTR_MASK&~PAGE_MASK)
178
179
180 #define PTRS_PER_PAGE (PAGE_SIZE/sizeof(void*))
181
182
183
184
185
186
187 #define SET_PAGE_DIR(tsk,pgdir) \
188 do { \
189 (tsk)->tss.ptbr = (unsigned long) (pgdir); \
190 if ((tsk) == current) \
191 invalidate(); \
192 } while (0)
193
194 extern unsigned long high_memory;
195
196
197
198
199
200 extern inline pte_t mk_pte(unsigned long page, pgprot_t pgprot)
201 { pte_t pte; pte_val(pte) = (page << (32-PAGE_SHIFT)) | pgprot_val(pgprot); return pte; }
202
203 extern inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
204 { pte_val(pte) = (pte_val(pte) & _PAGE_CHG_MASK) | pgprot_val(newprot); return pte; }
205
206 extern inline void pgd_set(pgd_t * pgdp, pte_t * ptep)
207 { pgd_val(*pgdp) = _PAGE_TABLE | (((unsigned long) ptep) << (32-PAGE_SHIFT)); }
208
209 extern inline unsigned long pte_page(pte_t pte) { return (pte_val(pte) & _PFN_MASK) >> (32-PAGE_SHIFT); }
210 extern inline unsigned long pgd_page(pgd_t pgd) { return (pgd_val(pgd) & _PFN_MASK) >> (32-PAGE_SHIFT); }
211
212 extern inline int pte_none(pte_t pte) { return !pte_val(pte); }
213 extern inline int pte_present(pte_t pte) { return pte_val(pte) & _PAGE_VALID; }
214 extern inline void pte_clear(pte_t *ptep) { pte_val(*ptep) = 0; }
215
216 extern inline int pgd_none(pgd_t pgd) { return !pgd_val(pgd); }
217 extern inline int pgd_bad(pgd_t pgd) { return (pgd_val(pgd) & ~_PFN_MASK) != _PAGE_TABLE || pgd_page(pgd) > high_memory; }
218 extern inline int pgd_present(pgd_t pgd) { return pgd_val(pgd) & _PAGE_VALID; }
219 extern inline void pgd_clear(pgd_t * pgdp) { pgd_val(*pgdp) = 0; }
220
221
222
223
224
225 extern inline int pte_read(pte_t pte) { return !(pte_val(pte) & _PAGE_FOR); }
226 extern inline int pte_write(pte_t pte) { return !(pte_val(pte) & _PAGE_FOW); }
227 extern inline int pte_exec(pte_t pte) { return !(pte_val(pte) & _PAGE_FOE); }
228 extern inline int pte_dirty(pte_t pte) { return pte_val(pte) & _PAGE_DIRTY; }
229 extern inline int pte_young(pte_t pte) { return pte_val(pte) & _PAGE_ACCESSED; }
230 extern inline int pte_cow(pte_t pte) { return pte_val(pte) & _PAGE_COW; }
231
232 extern inline pte_t pte_wrprotect(pte_t pte) { pte_val(pte) |= _PAGE_FOW; return pte; }
233 extern inline pte_t pte_rdprotect(pte_t pte) { pte_val(pte) |= _PAGE_FOR; return pte; }
234 extern inline pte_t pte_exprotect(pte_t pte) { pte_val(pte) |= _PAGE_FOE; return pte; }
235 extern inline pte_t pte_mkclean(pte_t pte) { pte_val(pte) &= ~(__DIRTY_BITS); return pte; }
236 extern inline pte_t pte_mkold(pte_t pte) { pte_val(pte) &= ~(__ACCESS_BITS); return pte; }
237 extern inline pte_t pte_uncow(pte_t pte) { pte_val(pte) &= ~_PAGE_COW; return pte; }
238 extern inline pte_t pte_mkwrite(pte_t pte) { pte_val(pte) &= _PAGE_FOW; return pte; }
239 extern inline pte_t pte_mkread(pte_t pte) { pte_val(pte) &= _PAGE_FOR; return pte; }
240 extern inline pte_t pte_mkexec(pte_t pte) { pte_val(pte) &= _PAGE_FOE; return pte; }
241 extern inline pte_t pte_mkdirty(pte_t pte) { pte_val(pte) |= __DIRTY_BITS; return pte; }
242 extern inline pte_t pte_mkyoung(pte_t pte) { pte_val(pte) |= __ACCESS_BITS; return pte; }
243 extern inline pte_t pte_mkcow(pte_t pte) { pte_val(pte) |= _PAGE_COW; return pte; }
244
245 #endif
246
247 #endif