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1da177e4 LT |
1 | #ifndef _M68K_PAGE_H |
2 | #define _M68K_PAGE_H | |
3 | ||
42b35923 GU |
4 | #include <linux/const.h> |
5 | ||
1da177e4 LT |
6 | /* PAGE_SHIFT determines the page size */ |
7 | #ifndef CONFIG_SUN3 | |
8 | #define PAGE_SHIFT (12) | |
9 | #else | |
10 | #define PAGE_SHIFT (13) | |
11 | #endif | |
42b35923 | 12 | #define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT) |
1da177e4 LT |
13 | #define PAGE_MASK (~(PAGE_SIZE-1)) |
14 | ||
1da177e4 LT |
15 | #include <asm/setup.h> |
16 | ||
17 | #if PAGE_SHIFT < 13 | |
18 | #define THREAD_SIZE (8192) | |
19 | #else | |
20 | #define THREAD_SIZE PAGE_SIZE | |
21 | #endif | |
22 | ||
23 | #ifndef __ASSEMBLY__ | |
24 | ||
4f855897 GU |
25 | #include <linux/compiler.h> |
26 | ||
fbe9c961 RZ |
27 | #include <asm/module.h> |
28 | ||
1da177e4 LT |
29 | #define get_user_page(vaddr) __get_free_page(GFP_KERNEL) |
30 | #define free_user_page(page, addr) free_page(addr) | |
31 | ||
32 | /* | |
33 | * We don't need to check for alignment etc. | |
34 | */ | |
35 | #ifdef CPU_M68040_OR_M68060_ONLY | |
36 | static inline void copy_page(void *to, void *from) | |
37 | { | |
38 | unsigned long tmp; | |
39 | ||
40 | __asm__ __volatile__("1:\t" | |
41 | ".chip 68040\n\t" | |
42 | "move16 %1@+,%0@+\n\t" | |
43 | "move16 %1@+,%0@+\n\t" | |
44 | ".chip 68k\n\t" | |
45 | "dbra %2,1b\n\t" | |
46 | : "=a" (to), "=a" (from), "=d" (tmp) | |
47 | : "0" (to), "1" (from) , "2" (PAGE_SIZE / 32 - 1) | |
48 | ); | |
49 | } | |
50 | ||
51 | static inline void clear_page(void *page) | |
52 | { | |
53 | unsigned long tmp; | |
54 | unsigned long *sp = page; | |
55 | ||
56 | *sp++ = 0; | |
57 | *sp++ = 0; | |
58 | *sp++ = 0; | |
59 | *sp++ = 0; | |
60 | ||
61 | __asm__ __volatile__("1:\t" | |
62 | ".chip 68040\n\t" | |
63 | "move16 %2@+,%0@+\n\t" | |
64 | ".chip 68k\n\t" | |
65 | "subqw #8,%2\n\t" | |
66 | "subqw #8,%2\n\t" | |
67 | "dbra %1,1b\n\t" | |
68 | : "=a" (sp), "=d" (tmp) | |
69 | : "a" (page), "0" (sp), | |
70 | "1" ((PAGE_SIZE - 16) / 16 - 1)); | |
71 | } | |
72 | ||
73 | #else | |
74 | #define clear_page(page) memset((page), 0, PAGE_SIZE) | |
75 | #define copy_page(to,from) memcpy((to), (from), PAGE_SIZE) | |
76 | #endif | |
77 | ||
78 | #define clear_user_page(addr, vaddr, page) \ | |
79 | do { clear_page(addr); \ | |
80 | flush_dcache_page(page); \ | |
81 | } while (0) | |
82 | #define copy_user_page(to, from, vaddr, page) \ | |
83 | do { copy_page(to, from); \ | |
84 | flush_dcache_page(page); \ | |
85 | } while (0) | |
86 | ||
87 | /* | |
88 | * These are used to make use of C type-checking.. | |
89 | */ | |
90 | typedef struct { unsigned long pte; } pte_t; | |
91 | typedef struct { unsigned long pmd[16]; } pmd_t; | |
92 | typedef struct { unsigned long pgd; } pgd_t; | |
93 | typedef struct { unsigned long pgprot; } pgprot_t; | |
2f569afd | 94 | typedef struct page *pgtable_t; |
1da177e4 LT |
95 | |
96 | #define pte_val(x) ((x).pte) | |
97 | #define pmd_val(x) ((&x)->pmd[0]) | |
98 | #define pgd_val(x) ((x).pgd) | |
99 | #define pgprot_val(x) ((x).pgprot) | |
100 | ||
101 | #define __pte(x) ((pte_t) { (x) } ) | |
102 | #define __pmd(x) ((pmd_t) { (x) } ) | |
103 | #define __pgd(x) ((pgd_t) { (x) } ) | |
104 | #define __pgprot(x) ((pgprot_t) { (x) } ) | |
105 | ||
1da177e4 LT |
106 | #endif /* !__ASSEMBLY__ */ |
107 | ||
108 | #include <asm/page_offset.h> | |
109 | ||
110 | #define PAGE_OFFSET (PAGE_OFFSET_RAW) | |
111 | ||
112 | #ifndef __ASSEMBLY__ | |
113 | ||
fbe9c961 RZ |
114 | extern unsigned long m68k_memoffset; |
115 | ||
1da177e4 LT |
116 | #ifndef CONFIG_SUN3 |
117 | ||
118 | #define WANT_PAGE_VIRTUAL | |
1da177e4 | 119 | |
fbe9c961 RZ |
120 | static inline unsigned long ___pa(void *vaddr) |
121 | { | |
122 | unsigned long paddr; | |
123 | asm ( | |
124 | "1: addl #0,%0\n" | |
125 | m68k_fixup(%c2, 1b+2) | |
126 | : "=r" (paddr) | |
127 | : "0" (vaddr), "i" (m68k_fixup_memoffset)); | |
128 | return paddr; | |
129 | } | |
12d810c1 | 130 | #define __pa(vaddr) ___pa((void *)(vaddr)) |
fbe9c961 RZ |
131 | static inline void *__va(unsigned long paddr) |
132 | { | |
133 | void *vaddr; | |
134 | asm ( | |
135 | "1: subl #0,%0\n" | |
136 | m68k_fixup(%c2, 1b+2) | |
137 | : "=r" (vaddr) | |
138 | : "0" (paddr), "i" (m68k_fixup_memoffset)); | |
139 | return vaddr; | |
140 | } | |
141 | ||
1da177e4 LT |
142 | #else /* !CONFIG_SUN3 */ |
143 | /* This #define is a horrible hack to suppress lots of warnings. --m */ | |
40bb0c3e | 144 | #define __pa(x) ___pa((unsigned long)(x)) |
1da177e4 LT |
145 | static inline unsigned long ___pa(unsigned long x) |
146 | { | |
147 | if(x == 0) | |
148 | return 0; | |
149 | if(x >= PAGE_OFFSET) | |
150 | return (x-PAGE_OFFSET); | |
151 | else | |
152 | return (x+0x2000000); | |
153 | } | |
154 | ||
155 | static inline void *__va(unsigned long x) | |
156 | { | |
157 | if(x == 0) | |
158 | return (void *)0; | |
159 | ||
160 | if(x < 0x2000000) | |
161 | return (void *)(x+PAGE_OFFSET); | |
162 | else | |
163 | return (void *)(x-0x2000000); | |
164 | } | |
165 | #endif /* CONFIG_SUN3 */ | |
166 | ||
167 | /* | |
168 | * NOTE: virtual isn't really correct, actually it should be the offset into the | |
169 | * memory node, but we have no highmem, so that works for now. | |
170 | * TODO: implement (fast) pfn<->pgdat_idx conversion functions, this makes lots | |
171 | * of the shifts unnecessary. | |
172 | */ | |
173 | #define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT) | |
174 | #define pfn_to_virt(pfn) __va((pfn) << PAGE_SHIFT) | |
175 | ||
12d810c1 RZ |
176 | extern int m68k_virt_to_node_shift; |
177 | ||
178 | #ifdef CONFIG_SINGLE_MEMORY_CHUNK | |
179 | #define __virt_to_node(addr) (&pg_data_map[0]) | |
180 | #else | |
181 | extern struct pglist_data *pg_data_table[]; | |
182 | ||
183 | static inline __attribute_const__ int __virt_to_node_shift(void) | |
184 | { | |
185 | int shift; | |
186 | ||
187 | asm ( | |
188 | "1: moveq #0,%0\n" | |
189 | m68k_fixup(%c1, 1b) | |
190 | : "=d" (shift) | |
191 | : "i" (m68k_fixup_vnode_shift)); | |
192 | return shift; | |
193 | } | |
194 | ||
195 | #define __virt_to_node(addr) (pg_data_table[(unsigned long)(addr) >> __virt_to_node_shift()]) | |
196 | #endif | |
1da177e4 | 197 | |
12d810c1 RZ |
198 | #define virt_to_page(addr) ({ \ |
199 | pfn_to_page(virt_to_pfn(addr)); \ | |
200 | }) | |
201 | #define page_to_virt(page) ({ \ | |
202 | pfn_to_virt(page_to_pfn(page)); \ | |
203 | }) | |
204 | ||
205 | #define pfn_to_page(pfn) ({ \ | |
206 | unsigned long __pfn = (pfn); \ | |
207 | struct pglist_data *pgdat; \ | |
208 | pgdat = __virt_to_node((unsigned long)pfn_to_virt(__pfn)); \ | |
209 | pgdat->node_mem_map + (__pfn - pgdat->node_start_pfn); \ | |
210 | }) | |
211 | #define page_to_pfn(_page) ({ \ | |
212 | struct page *__p = (_page); \ | |
213 | struct pglist_data *pgdat; \ | |
214 | pgdat = &pg_data_map[page_to_nid(__p)]; \ | |
215 | ((__p) - pgdat->node_mem_map) + pgdat->node_start_pfn; \ | |
216 | }) | |
1da177e4 LT |
217 | |
218 | #define virt_addr_valid(kaddr) ((void *)(kaddr) >= (void *)PAGE_OFFSET && (void *)(kaddr) < high_memory) | |
219 | #define pfn_valid(pfn) virt_addr_valid(pfn_to_virt(pfn)) | |
220 | ||
221 | #endif /* __ASSEMBLY__ */ | |
222 | ||
223 | #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ | |
224 | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) | |
225 | ||
fd4fd5aa SR |
226 | #include <asm-generic/page.h> |
227 | ||
1da177e4 | 228 | #endif /* _M68K_PAGE_H */ |