[POWERPC] macintosh: Replace deprecated __initcall with device_initcall
[linux-2.6/zen-sources.git] / include / asm-m68k / page.h
blob880c2cbff8a681cc8619ef50f5b26cd5fd202433
1 #ifndef _M68K_PAGE_H
2 #define _M68K_PAGE_H
4 #include <linux/const.h>
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 #define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT)
13 #define PAGE_MASK (~(PAGE_SIZE-1))
15 #include <asm/setup.h>
17 #if PAGE_SHIFT < 13
18 #define THREAD_SIZE (8192)
19 #else
20 #define THREAD_SIZE PAGE_SIZE
21 #endif
23 #ifndef __ASSEMBLY__
25 #include <linux/compiler.h>
27 #include <asm/module.h>
29 #define get_user_page(vaddr) __get_free_page(GFP_KERNEL)
30 #define free_user_page(page, addr) free_page(addr)
33 * We don't need to check for alignment etc.
35 #ifdef CPU_M68040_OR_M68060_ONLY
36 static inline void copy_page(void *to, void *from)
38 unsigned long tmp;
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)
51 static inline void clear_page(void *page)
53 unsigned long tmp;
54 unsigned long *sp = page;
56 *sp++ = 0;
57 *sp++ = 0;
58 *sp++ = 0;
59 *sp++ = 0;
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));
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
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)
88 * These are used to make use of C type-checking..
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;
94 typedef struct page *pgtable_t;
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)
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) } )
106 /* to align the pointer to the (next) page boundary */
107 #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
109 #endif /* !__ASSEMBLY__ */
111 #include <asm/page_offset.h>
113 #define PAGE_OFFSET (PAGE_OFFSET_RAW)
115 #ifndef __ASSEMBLY__
117 extern unsigned long m68k_memoffset;
119 #ifndef CONFIG_SUN3
121 #define WANT_PAGE_VIRTUAL
123 static inline unsigned long ___pa(void *vaddr)
125 unsigned long paddr;
126 asm (
127 "1: addl #0,%0\n"
128 m68k_fixup(%c2, 1b+2)
129 : "=r" (paddr)
130 : "0" (vaddr), "i" (m68k_fixup_memoffset));
131 return paddr;
133 #define __pa(vaddr) ___pa((void *)(vaddr))
134 static inline void *__va(unsigned long paddr)
136 void *vaddr;
137 asm (
138 "1: subl #0,%0\n"
139 m68k_fixup(%c2, 1b+2)
140 : "=r" (vaddr)
141 : "0" (paddr), "i" (m68k_fixup_memoffset));
142 return vaddr;
145 #else /* !CONFIG_SUN3 */
146 /* This #define is a horrible hack to suppress lots of warnings. --m */
147 #define __pa(x) ___pa((unsigned long)(x))
148 static inline unsigned long ___pa(unsigned long x)
150 if(x == 0)
151 return 0;
152 if(x >= PAGE_OFFSET)
153 return (x-PAGE_OFFSET);
154 else
155 return (x+0x2000000);
158 static inline void *__va(unsigned long x)
160 if(x == 0)
161 return (void *)0;
163 if(x < 0x2000000)
164 return (void *)(x+PAGE_OFFSET);
165 else
166 return (void *)(x-0x2000000);
168 #endif /* CONFIG_SUN3 */
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.
176 #define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT)
177 #define pfn_to_virt(pfn) __va((pfn) << PAGE_SHIFT)
179 extern int m68k_virt_to_node_shift;
181 #ifdef CONFIG_SINGLE_MEMORY_CHUNK
182 #define __virt_to_node(addr) (&pg_data_map[0])
183 #else
184 extern struct pglist_data *pg_data_table[];
186 static inline __attribute_const__ int __virt_to_node_shift(void)
188 int shift;
190 asm (
191 "1: moveq #0,%0\n"
192 m68k_fixup(%c1, 1b)
193 : "=d" (shift)
194 : "i" (m68k_fixup_vnode_shift));
195 return shift;
198 #define __virt_to_node(addr) (pg_data_table[(unsigned long)(addr) >> __virt_to_node_shift()])
199 #endif
201 #define virt_to_page(addr) ({ \
202 pfn_to_page(virt_to_pfn(addr)); \
204 #define page_to_virt(page) ({ \
205 pfn_to_virt(page_to_pfn(page)); \
208 #define pfn_to_page(pfn) ({ \
209 unsigned long __pfn = (pfn); \
210 struct pglist_data *pgdat; \
211 pgdat = __virt_to_node((unsigned long)pfn_to_virt(__pfn)); \
212 pgdat->node_mem_map + (__pfn - pgdat->node_start_pfn); \
214 #define page_to_pfn(_page) ({ \
215 struct page *__p = (_page); \
216 struct pglist_data *pgdat; \
217 pgdat = &pg_data_map[page_to_nid(__p)]; \
218 ((__p) - pgdat->node_mem_map) + pgdat->node_start_pfn; \
221 #define virt_addr_valid(kaddr) ((void *)(kaddr) >= (void *)PAGE_OFFSET && (void *)(kaddr) < high_memory)
222 #define pfn_valid(pfn) virt_addr_valid(pfn_to_virt(pfn))
224 #endif /* __ASSEMBLY__ */
226 #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
227 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
229 #include <asm-generic/page.h>
231 #endif /* _M68K_PAGE_H */