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1da177e4 LT |
1 | #ifndef _M68K_PAGE_H |
2 | #define _M68K_PAGE_H | |
3 | ||
1da177e4 | 4 | |
020d8c06 GU |
5 | #ifdef __KERNEL__ |
6 | ||
1da177e4 LT |
7 | /* PAGE_SHIFT determines the page size */ |
8 | #ifndef CONFIG_SUN3 | |
9 | #define PAGE_SHIFT (12) | |
10 | #else | |
11 | #define PAGE_SHIFT (13) | |
12 | #endif | |
13 | #ifdef __ASSEMBLY__ | |
14 | #define PAGE_SIZE (1 << PAGE_SHIFT) | |
15 | #else | |
16 | #define PAGE_SIZE (1UL << PAGE_SHIFT) | |
17 | #endif | |
18 | #define PAGE_MASK (~(PAGE_SIZE-1)) | |
19 | ||
1da177e4 LT |
20 | #include <asm/setup.h> |
21 | ||
22 | #if PAGE_SHIFT < 13 | |
23 | #define THREAD_SIZE (8192) | |
24 | #else | |
25 | #define THREAD_SIZE PAGE_SIZE | |
26 | #endif | |
27 | ||
28 | #ifndef __ASSEMBLY__ | |
29 | ||
4f855897 GU |
30 | #include <linux/compiler.h> |
31 | ||
fbe9c961 RZ |
32 | #include <asm/module.h> |
33 | ||
1da177e4 LT |
34 | #define get_user_page(vaddr) __get_free_page(GFP_KERNEL) |
35 | #define free_user_page(page, addr) free_page(addr) | |
36 | ||
37 | /* | |
38 | * We don't need to check for alignment etc. | |
39 | */ | |
40 | #ifdef CPU_M68040_OR_M68060_ONLY | |
41 | static inline void copy_page(void *to, void *from) | |
42 | { | |
43 | unsigned long tmp; | |
44 | ||
45 | __asm__ __volatile__("1:\t" | |
46 | ".chip 68040\n\t" | |
47 | "move16 %1@+,%0@+\n\t" | |
48 | "move16 %1@+,%0@+\n\t" | |
49 | ".chip 68k\n\t" | |
50 | "dbra %2,1b\n\t" | |
51 | : "=a" (to), "=a" (from), "=d" (tmp) | |
52 | : "0" (to), "1" (from) , "2" (PAGE_SIZE / 32 - 1) | |
53 | ); | |
54 | } | |
55 | ||
56 | static inline void clear_page(void *page) | |
57 | { | |
58 | unsigned long tmp; | |
59 | unsigned long *sp = page; | |
60 | ||
61 | *sp++ = 0; | |
62 | *sp++ = 0; | |
63 | *sp++ = 0; | |
64 | *sp++ = 0; | |
65 | ||
66 | __asm__ __volatile__("1:\t" | |
67 | ".chip 68040\n\t" | |
68 | "move16 %2@+,%0@+\n\t" | |
69 | ".chip 68k\n\t" | |
70 | "subqw #8,%2\n\t" | |
71 | "subqw #8,%2\n\t" | |
72 | "dbra %1,1b\n\t" | |
73 | : "=a" (sp), "=d" (tmp) | |
74 | : "a" (page), "0" (sp), | |
75 | "1" ((PAGE_SIZE - 16) / 16 - 1)); | |
76 | } | |
77 | ||
78 | #else | |
79 | #define clear_page(page) memset((page), 0, PAGE_SIZE) | |
80 | #define copy_page(to,from) memcpy((to), (from), PAGE_SIZE) | |
81 | #endif | |
82 | ||
83 | #define clear_user_page(addr, vaddr, page) \ | |
84 | do { clear_page(addr); \ | |
85 | flush_dcache_page(page); \ | |
86 | } while (0) | |
87 | #define copy_user_page(to, from, vaddr, page) \ | |
88 | do { copy_page(to, from); \ | |
89 | flush_dcache_page(page); \ | |
90 | } while (0) | |
91 | ||
92 | /* | |
93 | * These are used to make use of C type-checking.. | |
94 | */ | |
95 | typedef struct { unsigned long pte; } pte_t; | |
96 | typedef struct { unsigned long pmd[16]; } pmd_t; | |
97 | typedef struct { unsigned long pgd; } pgd_t; | |
98 | typedef struct { unsigned long pgprot; } pgprot_t; | |
99 | ||
100 | #define pte_val(x) ((x).pte) | |
101 | #define pmd_val(x) ((&x)->pmd[0]) | |
102 | #define pgd_val(x) ((x).pgd) | |
103 | #define pgprot_val(x) ((x).pgprot) | |
104 | ||
105 | #define __pte(x) ((pte_t) { (x) } ) | |
106 | #define __pmd(x) ((pmd_t) { (x) } ) | |
107 | #define __pgd(x) ((pgd_t) { (x) } ) | |
108 | #define __pgprot(x) ((pgprot_t) { (x) } ) | |
109 | ||
110 | /* to align the pointer to the (next) page boundary */ | |
111 | #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK) | |
112 | ||
1da177e4 LT |
113 | #endif /* !__ASSEMBLY__ */ |
114 | ||
115 | #include <asm/page_offset.h> | |
116 | ||
117 | #define PAGE_OFFSET (PAGE_OFFSET_RAW) | |
118 | ||
119 | #ifndef __ASSEMBLY__ | |
120 | ||
fbe9c961 RZ |
121 | extern unsigned long m68k_memoffset; |
122 | ||
1da177e4 LT |
123 | #ifndef CONFIG_SUN3 |
124 | ||
125 | #define WANT_PAGE_VIRTUAL | |
1da177e4 | 126 | |
fbe9c961 RZ |
127 | static inline unsigned long ___pa(void *vaddr) |
128 | { | |
129 | unsigned long paddr; | |
130 | asm ( | |
131 | "1: addl #0,%0\n" | |
132 | m68k_fixup(%c2, 1b+2) | |
133 | : "=r" (paddr) | |
134 | : "0" (vaddr), "i" (m68k_fixup_memoffset)); | |
135 | return paddr; | |
136 | } | |
12d810c1 | 137 | #define __pa(vaddr) ___pa((void *)(vaddr)) |
fbe9c961 RZ |
138 | static inline void *__va(unsigned long paddr) |
139 | { | |
140 | void *vaddr; | |
141 | asm ( | |
142 | "1: subl #0,%0\n" | |
143 | m68k_fixup(%c2, 1b+2) | |
144 | : "=r" (vaddr) | |
145 | : "0" (paddr), "i" (m68k_fixup_memoffset)); | |
146 | return vaddr; | |
147 | } | |
148 | ||
1da177e4 LT |
149 | #else /* !CONFIG_SUN3 */ |
150 | /* This #define is a horrible hack to suppress lots of warnings. --m */ | |
40bb0c3e | 151 | #define __pa(x) ___pa((unsigned long)(x)) |
1da177e4 LT |
152 | static inline unsigned long ___pa(unsigned long x) |
153 | { | |
154 | if(x == 0) | |
155 | return 0; | |
156 | if(x >= PAGE_OFFSET) | |
157 | return (x-PAGE_OFFSET); | |
158 | else | |
159 | return (x+0x2000000); | |
160 | } | |
161 | ||
162 | static inline void *__va(unsigned long x) | |
163 | { | |
164 | if(x == 0) | |
165 | return (void *)0; | |
166 | ||
167 | if(x < 0x2000000) | |
168 | return (void *)(x+PAGE_OFFSET); | |
169 | else | |
170 | return (void *)(x-0x2000000); | |
171 | } | |
172 | #endif /* CONFIG_SUN3 */ | |
173 | ||
174 | /* | |
175 | * NOTE: virtual isn't really correct, actually it should be the offset into the | |
176 | * memory node, but we have no highmem, so that works for now. | |
177 | * TODO: implement (fast) pfn<->pgdat_idx conversion functions, this makes lots | |
178 | * of the shifts unnecessary. | |
179 | */ | |
180 | #define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT) | |
181 | #define pfn_to_virt(pfn) __va((pfn) << PAGE_SHIFT) | |
182 | ||
12d810c1 RZ |
183 | extern int m68k_virt_to_node_shift; |
184 | ||
185 | #ifdef CONFIG_SINGLE_MEMORY_CHUNK | |
186 | #define __virt_to_node(addr) (&pg_data_map[0]) | |
187 | #else | |
188 | extern struct pglist_data *pg_data_table[]; | |
189 | ||
190 | static inline __attribute_const__ int __virt_to_node_shift(void) | |
191 | { | |
192 | int shift; | |
193 | ||
194 | asm ( | |
195 | "1: moveq #0,%0\n" | |
196 | m68k_fixup(%c1, 1b) | |
197 | : "=d" (shift) | |
198 | : "i" (m68k_fixup_vnode_shift)); | |
199 | return shift; | |
200 | } | |
201 | ||
202 | #define __virt_to_node(addr) (pg_data_table[(unsigned long)(addr) >> __virt_to_node_shift()]) | |
203 | #endif | |
1da177e4 | 204 | |
12d810c1 RZ |
205 | #define virt_to_page(addr) ({ \ |
206 | pfn_to_page(virt_to_pfn(addr)); \ | |
207 | }) | |
208 | #define page_to_virt(page) ({ \ | |
209 | pfn_to_virt(page_to_pfn(page)); \ | |
210 | }) | |
211 | ||
212 | #define pfn_to_page(pfn) ({ \ | |
213 | unsigned long __pfn = (pfn); \ | |
214 | struct pglist_data *pgdat; \ | |
215 | pgdat = __virt_to_node((unsigned long)pfn_to_virt(__pfn)); \ | |
216 | pgdat->node_mem_map + (__pfn - pgdat->node_start_pfn); \ | |
217 | }) | |
218 | #define page_to_pfn(_page) ({ \ | |
219 | struct page *__p = (_page); \ | |
220 | struct pglist_data *pgdat; \ | |
221 | pgdat = &pg_data_map[page_to_nid(__p)]; \ | |
222 | ((__p) - pgdat->node_mem_map) + pgdat->node_start_pfn; \ | |
223 | }) | |
1da177e4 LT |
224 | |
225 | #define virt_addr_valid(kaddr) ((void *)(kaddr) >= (void *)PAGE_OFFSET && (void *)(kaddr) < high_memory) | |
226 | #define pfn_valid(pfn) virt_addr_valid(pfn_to_virt(pfn)) | |
227 | ||
228 | #endif /* __ASSEMBLY__ */ | |
229 | ||
230 | #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ | |
231 | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) | |
232 | ||
fd4fd5aa SR |
233 | #include <asm-generic/page.h> |
234 | ||
020d8c06 GU |
235 | #endif /* __KERNEL__ */ |
236 | ||
1da177e4 | 237 | #endif /* _M68K_PAGE_H */ |