1#ifndef _M68K_PAGE_MM_H
2#define _M68K_PAGE_MM_H
3
4#ifndef __ASSEMBLY__
5
6#include <linux/compiler.h>
7#include <asm/module.h>
8
9#define get_user_page(vaddr) __get_free_page(GFP_KERNEL)
10#define free_user_page(page, addr) free_page(addr)
11
12
13
14
15#ifdef CPU_M68040_OR_M68060_ONLY
16static inline void copy_page(void *to, void *from)
17{
18 unsigned long tmp;
19
20 __asm__ __volatile__("1:\t"
21 ".chip 68040\n\t"
22 "move16 %1@+,%0@+\n\t"
23 "move16 %1@+,%0@+\n\t"
24 ".chip 68k\n\t"
25 "dbra %2,1b\n\t"
26 : "=a" (to), "=a" (from), "=d" (tmp)
27 : "0" (to), "1" (from) , "2" (PAGE_SIZE / 32 - 1)
28 );
29}
30
31static inline void clear_page(void *page)
32{
33 unsigned long tmp;
34 unsigned long *sp = page;
35
36 *sp++ = 0;
37 *sp++ = 0;
38 *sp++ = 0;
39 *sp++ = 0;
40
41 __asm__ __volatile__("1:\t"
42 ".chip 68040\n\t"
43 "move16 %2@+,%0@+\n\t"
44 ".chip 68k\n\t"
45 "subqw #8,%2\n\t"
46 "subqw #8,%2\n\t"
47 "dbra %1,1b\n\t"
48 : "=a" (sp), "=d" (tmp)
49 : "a" (page), "0" (sp),
50 "1" ((PAGE_SIZE - 16) / 16 - 1));
51}
52
53#else
54#define clear_page(page) memset((page), 0, PAGE_SIZE)
55#define copy_page(to,from) memcpy((to), (from), PAGE_SIZE)
56#endif
57
58#define clear_user_page(addr, vaddr, page) \
59 do { clear_page(addr); \
60 flush_dcache_page(page); \
61 } while (0)
62#define copy_user_page(to, from, vaddr, page) \
63 do { copy_page(to, from); \
64 flush_dcache_page(page); \
65 } while (0)
66
67extern unsigned long m68k_memoffset;
68
69#ifndef CONFIG_SUN3
70
71#define WANT_PAGE_VIRTUAL
72
73static inline unsigned long ___pa(void *vaddr)
74{
75 unsigned long paddr;
76 asm (
77 "1: addl #0,%0\n"
78 m68k_fixup(%c2, 1b+2)
79 : "=r" (paddr)
80 : "0" (vaddr), "i" (m68k_fixup_memoffset));
81 return paddr;
82}
83#define __pa(vaddr) ___pa((void *)(long)(vaddr))
84static inline void *__va(unsigned long paddr)
85{
86 void *vaddr;
87 asm (
88 "1: subl #0,%0\n"
89 m68k_fixup(%c2, 1b+2)
90 : "=r" (vaddr)
91 : "0" (paddr), "i" (m68k_fixup_memoffset));
92 return vaddr;
93}
94
95#else
96
97#define __pa(x) ___pa((unsigned long)(x))
98static inline unsigned long ___pa(unsigned long x)
99{
100 if(x == 0)
101 return 0;
102 if(x >= PAGE_OFFSET)
103 return (x-PAGE_OFFSET);
104 else
105 return (x+0x2000000);
106}
107
108static inline void *__va(unsigned long x)
109{
110 if(x == 0)
111 return (void *)0;
112
113 if(x < 0x2000000)
114 return (void *)(x+PAGE_OFFSET);
115 else
116 return (void *)(x-0x2000000);
117}
118#endif
119
120
121
122
123
124
125
126#define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT)
127#define pfn_to_virt(pfn) __va((pfn) << PAGE_SHIFT)
128
129extern int m68k_virt_to_node_shift;
130
131#ifdef CONFIG_SINGLE_MEMORY_CHUNK
132#define __virt_to_node(addr) (&pg_data_map[0])
133#else
134extern struct pglist_data *pg_data_table[];
135
136static inline __attribute_const__ int __virt_to_node_shift(void)
137{
138 int shift;
139
140 asm (
141 "1: moveq #0,%0\n"
142 m68k_fixup(%c1, 1b)
143 : "=d" (shift)
144 : "i" (m68k_fixup_vnode_shift));
145 return shift;
146}
147
148#define __virt_to_node(addr) (pg_data_table[(unsigned long)(addr) >> __virt_to_node_shift()])
149#endif
150
151#define virt_to_page(addr) ({ \
152 pfn_to_page(virt_to_pfn(addr)); \
153})
154#define page_to_virt(page) ({ \
155 pfn_to_virt(page_to_pfn(page)); \
156})
157
158#define pfn_to_page(pfn) ({ \
159 unsigned long __pfn = (pfn); \
160 struct pglist_data *pgdat; \
161 pgdat = __virt_to_node((unsigned long)pfn_to_virt(__pfn)); \
162 pgdat->node_mem_map + (__pfn - pgdat->node_start_pfn); \
163})
164#define page_to_pfn(_page) ({ \
165 const struct page *__p = (_page); \
166 struct pglist_data *pgdat; \
167 pgdat = &pg_data_map[page_to_nid(__p)]; \
168 ((__p) - pgdat->node_mem_map) + pgdat->node_start_pfn; \
169})
170
171#define virt_addr_valid(kaddr) ((void *)(kaddr) >= (void *)PAGE_OFFSET && (void *)(kaddr) < high_memory)
172#define pfn_valid(pfn) virt_addr_valid(pfn_to_virt(pfn))
173
174#endif
175
176#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
177 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
178
179#endif
180
