aboutsummaryrefslogtreecommitdiffstats
path: root/include/asm-v850/page.h
blob: b4bc85e7b91a1440b0aafe6fc40d055a94498b8a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
/*
 * include/asm-v850/page.h -- VM ops
 *
 *  Copyright (C) 2001,02,03,05  NEC Electronics Corporation
 *  Copyright (C) 2001,02,03,05  Miles Bader <miles@gnu.org>
 *
 * This file is subject to the terms and conditions of the GNU General
 * Public License.  See the file COPYING in the main directory of this
 * archive for more details.
 *
 * Written by Miles Bader <miles@gnu.org>
 */

#ifndef __V850_PAGE_H__
#define __V850_PAGE_H__

#include <asm/machdep.h>


#define PAGE_SHIFT	12
#define PAGE_SIZE       (1UL << PAGE_SHIFT)
#define PAGE_MASK       (~(PAGE_SIZE-1))


/*
 * PAGE_OFFSET -- the first address of the first page of memory. For archs with
 * no MMU this corresponds to the first free page in physical memory (aligned
 * on a page boundary).
 */
#ifndef PAGE_OFFSET
#define PAGE_OFFSET  0x0000000
#endif


#ifdef __KERNEL__
#ifndef __ASSEMBLY__

#define STRICT_MM_TYPECHECKS

#define clear_page(page)	memset ((void *)(page), 0, PAGE_SIZE)
#define copy_page(to, from)	memcpy ((void *)(to), (void *)from, PAGE_SIZE)

#define clear_user_page(addr, vaddr, page)	\
	do { 	clear_page(addr);		\
		flush_dcache_page(page);	\
	} while (0)
#define copy_user_page(to, from, vaddr, page)	\
	do {	copy_page(to, from);		\
		flush_dcache_page(page);	\
	} while (0)

#ifdef STRICT_MM_TYPECHECKS
/*
 * These are used to make use of C type-checking..
 */

typedef struct { unsigned long pte; } pte_t;
typedef struct { unsigned long pmd; } pmd_t;
typedef struct { unsigned long pgd; } pgd_t;
typedef struct { unsigned long pgprot; } pgprot_t;

#define pte_val(x)      ((x).pte)
#define pmd_val(x)      ((x).pmd)
#define pgd_val(x)      ((x).pgd)
#define pgprot_val(x)   ((x).pgprot)

#define __pte(x)        ((pte_t) { (x) } )
#define __pmd(x)        ((pmd_t) { (x) } )
#define __pgd(x)        ((pgd_t) { (x) } )
#define __pgprot(x)     ((pgprot_t) { (x) } )

#else /* !STRICT_MM_TYPECHECKS */
/*
 * .. while these make it easier on the compiler
 */

typedef unsigned long pte_t;
typedef unsigned long pmd_t;
typedef unsigned long pgd_t;
typedef unsigned long pgprot_t;

#define pte_val(x)      (x)
#define pmd_val(x)      (x)
#define pgd_val(x)      (x)
#define pgprot_val(x)   (x)

#define __pte(x)        (x)
#define __pmd(x)        (x)
#define __pgd(x)        (x)
#define __pgprot(x)     (x)

#endif /* STRICT_MM_TYPECHECKS */

#endif /* !__ASSEMBLY__ */


/* to align the pointer to the (next) page boundary */
#define PAGE_ALIGN(addr)	(((addr) + PAGE_SIZE - 1) & PAGE_MASK)


/* No current v850 processor has virtual memory.  */
#define __virt_to_phys(addr)	(addr)
#define __phys_to_virt(addr)	(addr)

#define virt_to_pfn(kaddr)	(__virt_to_phys (kaddr) >> PAGE_SHIFT)
#define pfn_to_virt(pfn)	__phys_to_virt ((pfn) << PAGE_SHIFT)

#define MAP_NR(kaddr) \
  (((unsigned long)(kaddr) - PAGE_OFFSET) >> PAGE_SHIFT)
#define virt_to_page(kaddr)	(mem_map + MAP_NR (kaddr))
#define page_to_virt(page) \
  ((((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET)

#define pfn_to_page(pfn)	virt_to_page (pfn_to_virt (pfn))
#define page_to_pfn(page)	virt_to_pfn (page_to_virt (page))
#define pfn_valid(pfn)	        ((pfn) < max_mapnr)

#define	virt_addr_valid(kaddr)						\
  (((void *)(kaddr) >= (void *)PAGE_OFFSET) && MAP_NR (kaddr) < max_mapnr)


#define __pa(x)		     __virt_to_phys ((unsigned long)(x))
#define __va(x)		     ((void *)__phys_to_virt ((unsigned long)(x)))


#endif /* KERNEL */

#include <asm-generic/page.h>

#endif /* __V850_PAGE_H__ */