1#ifndef _M68K_PAGE_H
2#define _M68K_PAGE_H
3
4#include <linux/const.h>
5
6
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))
14
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
25#include <linux/compiler.h>
26
27#include <asm/module.h>
28
29#define get_user_page(vaddr) __get_free_page(GFP_KERNEL)
30#define free_user_page(page, addr) free_page(addr)
31
32
33
34
35#ifdef CPU_M68040_OR_M68060_ONLY
36static 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
51static 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
89
90typedef struct { unsigned long pte; } pte_t;
91typedef struct { unsigned long pmd[16]; } pmd_t;
92typedef struct { unsigned long pgd; } pgd_t;
93typedef struct { unsigned long pgprot; } pgprot_t;
94typedef struct page *pgtable_t;
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
106
107#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
108
109#endif
110
111#include <asm/page_offset.h>
112
113#define PAGE_OFFSET (PAGE_OFFSET_RAW)
114
115#ifndef __ASSEMBLY__
116
117extern unsigned long m68k_memoffset;
118
119#ifndef CONFIG_SUN3
120
121#define WANT_PAGE_VIRTUAL
122
123static inline unsigned long ___pa(void *vaddr)
124{
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;
132}
133#define __pa(vaddr) ___pa((void *)(vaddr))
134static inline void *__va(unsigned long paddr)
135{
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;
143}
144
145#else
146
147#define __pa(x) ___pa((unsigned long)(x))
148static 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
158static 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
169
170
171
172
173
174
175
176#define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT)
177#define pfn_to_virt(pfn) __va((pfn) << PAGE_SHIFT)
178
179extern int m68k_virt_to_node_shift;
180
181#ifdef CONFIG_SINGLE_MEMORY_CHUNK
182#define __virt_to_node(addr) (&pg_data_map[0])
183#else
184extern struct pglist_data *pg_data_table[];
185
186static inline __attribute_const__ int __virt_to_node_shift(void)
187{
188 int shift;
189
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;
196}
197
198#define __virt_to_node(addr) (pg_data_table[(unsigned long)(addr) >> __virt_to_node_shift()])
199#endif
200
201#define virt_to_page(addr) ({ \
202 pfn_to_page(virt_to_pfn(addr)); \
203})
204#define page_to_virt(page) ({ \
205 pfn_to_virt(page_to_pfn(page)); \
206})
207
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); \
213})
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; \
219})
220
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))
223
224#endif
225
226#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
227 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
228
229#include <asm-generic/page.h>
230
231#endif
232
