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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef _M68K_PAGE_H
2#define _M68K_PAGE_H
3
Linus Torvalds1da177e2005-04-16 15:20:36 -07004
Geert Uytterhoeven020d8c02006-09-18 20:12:23 -07005#ifdef __KERNEL__
6
Linus Torvalds1da177e2005-04-16 15:20:36 -07007/* PAGE_SHIFT determines the page size */
8#ifndef CONFIG_SUN3
9#define PAGE_SHIFT (12)
10#else
11#define PAGE_SHIFT (13)
12#endif
13#ifdef __ASSEMBLY__
14#define PAGE_SIZE (1 << PAGE_SHIFT)
15#else
16#define PAGE_SIZE (1UL << PAGE_SHIFT)
17#endif
18#define PAGE_MASK (~(PAGE_SIZE-1))
19
Linus Torvalds1da177e2005-04-16 15:20:36 -070020#include <asm/setup.h>
21
22#if PAGE_SHIFT < 13
23#define THREAD_SIZE (8192)
24#else
25#define THREAD_SIZE PAGE_SIZE
26#endif
27
28#ifndef __ASSEMBLY__
29
30#define get_user_page(vaddr) __get_free_page(GFP_KERNEL)
31#define free_user_page(page, addr) free_page(addr)
32
33/*
34 * We don't need to check for alignment etc.
35 */
36#ifdef CPU_M68040_OR_M68060_ONLY
37static inline void copy_page(void *to, void *from)
38{
39 unsigned long tmp;
40
41 __asm__ __volatile__("1:\t"
42 ".chip 68040\n\t"
43 "move16 %1@+,%0@+\n\t"
44 "move16 %1@+,%0@+\n\t"
45 ".chip 68k\n\t"
46 "dbra %2,1b\n\t"
47 : "=a" (to), "=a" (from), "=d" (tmp)
48 : "0" (to), "1" (from) , "2" (PAGE_SIZE / 32 - 1)
49 );
50}
51
52static inline void clear_page(void *page)
53{
54 unsigned long tmp;
55 unsigned long *sp = page;
56
57 *sp++ = 0;
58 *sp++ = 0;
59 *sp++ = 0;
60 *sp++ = 0;
61
62 __asm__ __volatile__("1:\t"
63 ".chip 68040\n\t"
64 "move16 %2@+,%0@+\n\t"
65 ".chip 68k\n\t"
66 "subqw #8,%2\n\t"
67 "subqw #8,%2\n\t"
68 "dbra %1,1b\n\t"
69 : "=a" (sp), "=d" (tmp)
70 : "a" (page), "0" (sp),
71 "1" ((PAGE_SIZE - 16) / 16 - 1));
72}
73
74#else
75#define clear_page(page) memset((page), 0, PAGE_SIZE)
76#define copy_page(to,from) memcpy((to), (from), PAGE_SIZE)
77#endif
78
79#define clear_user_page(addr, vaddr, page) \
80 do { clear_page(addr); \
81 flush_dcache_page(page); \
82 } while (0)
83#define copy_user_page(to, from, vaddr, page) \
84 do { copy_page(to, from); \
85 flush_dcache_page(page); \
86 } while (0)
87
88/*
89 * These are used to make use of C type-checking..
90 */
91typedef struct { unsigned long pte; } pte_t;
92typedef struct { unsigned long pmd[16]; } pmd_t;
93typedef struct { unsigned long pgd; } pgd_t;
94typedef struct { unsigned long pgprot; } pgprot_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/* to align the pointer to the (next) page boundary */
107#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
108
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109#endif /* !__ASSEMBLY__ */
110
111#include <asm/page_offset.h>
112
113#define PAGE_OFFSET (PAGE_OFFSET_RAW)
114
115#ifndef __ASSEMBLY__
116
117#ifndef CONFIG_SUN3
118
119#define WANT_PAGE_VIRTUAL
120#ifdef CONFIG_SINGLE_MEMORY_CHUNK
121extern unsigned long m68k_memoffset;
122
123#define __pa(vaddr) ((unsigned long)(vaddr)+m68k_memoffset)
124#define __va(paddr) ((void *)((unsigned long)(paddr)-m68k_memoffset))
125#else
Andreas Schwab40bb0c32005-08-24 17:36:21 +0200126#define __pa(vaddr) virt_to_phys((void *)(vaddr))
127#define __va(paddr) phys_to_virt((unsigned long)(paddr))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128#endif
129
130#else /* !CONFIG_SUN3 */
131/* This #define is a horrible hack to suppress lots of warnings. --m */
Andreas Schwab40bb0c32005-08-24 17:36:21 +0200132#define __pa(x) ___pa((unsigned long)(x))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133static inline unsigned long ___pa(unsigned long x)
134{
135 if(x == 0)
136 return 0;
137 if(x >= PAGE_OFFSET)
138 return (x-PAGE_OFFSET);
139 else
140 return (x+0x2000000);
141}
142
143static inline void *__va(unsigned long x)
144{
145 if(x == 0)
146 return (void *)0;
147
148 if(x < 0x2000000)
149 return (void *)(x+PAGE_OFFSET);
150 else
151 return (void *)(x-0x2000000);
152}
153#endif /* CONFIG_SUN3 */
154
155/*
156 * NOTE: virtual isn't really correct, actually it should be the offset into the
157 * memory node, but we have no highmem, so that works for now.
158 * TODO: implement (fast) pfn<->pgdat_idx conversion functions, this makes lots
159 * of the shifts unnecessary.
160 */
161#define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT)
162#define pfn_to_virt(pfn) __va((pfn) << PAGE_SHIFT)
163
164#define virt_to_page(kaddr) (mem_map + (((unsigned long)(kaddr)-PAGE_OFFSET) >> PAGE_SHIFT))
165#define page_to_virt(page) ((((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET)
166
167#define pfn_to_page(pfn) virt_to_page(pfn_to_virt(pfn))
168#define page_to_pfn(page) virt_to_pfn(page_to_virt(page))
169
170#define virt_addr_valid(kaddr) ((void *)(kaddr) >= (void *)PAGE_OFFSET && (void *)(kaddr) < high_memory)
171#define pfn_valid(pfn) virt_addr_valid(pfn_to_virt(pfn))
172
173#endif /* __ASSEMBLY__ */
174
175#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
176 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
177
Stephen Rothwellfd4fd5a2005-09-03 15:54:30 -0700178#include <asm-generic/page.h>
179
Geert Uytterhoeven020d8c02006-09-18 20:12:23 -0700180#endif /* __KERNEL__ */
181
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182#endif /* _M68K_PAGE_H */