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