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1/*
2 * include/asm-v850/page.h -- VM ops
3 *
4 * Copyright (C) 2001,02,03,05 NEC Electronics Corporation
5 * Copyright (C) 2001,02,03,05 Miles Bader <miles@gnu.org>
6 *
7 * This file is subject to the terms and conditions of the GNU General
8 * Public License. See the file COPYING in the main directory of this
9 * archive for more details.
10 *
11 * Written by Miles Bader <miles@gnu.org>
12 */
13
14#ifndef __V850_PAGE_H__
15#define __V850_PAGE_H__
16
17#include <asm/machdep.h>
18
19
20#define PAGE_SHIFT 12
21#define PAGE_SIZE (1UL << PAGE_SHIFT)
22#define PAGE_MASK (~(PAGE_SIZE-1))
23
24
25/*
26 * PAGE_OFFSET -- the first address of the first page of memory. For archs with
27 * no MMU this corresponds to the first free page in physical memory (aligned
28 * on a page boundary).
29 */
30#ifndef PAGE_OFFSET
31#define PAGE_OFFSET 0x0000000
32#endif
33
34
35#ifdef __KERNEL__
36#ifndef __ASSEMBLY__
37
38#define STRICT_MM_TYPECHECKS
39
40#define clear_page(page) memset ((void *)(page), 0, PAGE_SIZE)
41#define copy_page(to, from) memcpy ((void *)(to), (void *)from, PAGE_SIZE)
42
43#define clear_user_page(addr, vaddr, page) \
44 do { clear_page(addr); \
45 flush_dcache_page(page); \
46 } while (0)
47#define copy_user_page(to, from, vaddr, page) \
48 do { copy_page(to, from); \
49 flush_dcache_page(page); \
50 } while (0)
51
52#ifdef STRICT_MM_TYPECHECKS
53/*
54 * These are used to make use of C type-checking..
55 */
56
57typedef struct { unsigned long pte; } pte_t;
58typedef struct { unsigned long pmd; } pmd_t;
59typedef struct { unsigned long pgd; } pgd_t;
60typedef struct { unsigned long pgprot; } pgprot_t;
61
62#define pte_val(x) ((x).pte)
63#define pmd_val(x) ((x).pmd)
64#define pgd_val(x) ((x).pgd)
65#define pgprot_val(x) ((x).pgprot)
66
67#define __pte(x) ((pte_t) { (x) } )
68#define __pmd(x) ((pmd_t) { (x) } )
69#define __pgd(x) ((pgd_t) { (x) } )
70#define __pgprot(x) ((pgprot_t) { (x) } )
71
72#else /* !STRICT_MM_TYPECHECKS */
73/*
74 * .. while these make it easier on the compiler
75 */
76
77typedef unsigned long pte_t;
78typedef unsigned long pmd_t;
79typedef unsigned long pgd_t;
80typedef unsigned long pgprot_t;
81
82#define pte_val(x) (x)
83#define pmd_val(x) (x)
84#define pgd_val(x) (x)
85#define pgprot_val(x) (x)
86
87#define __pte(x) (x)
88#define __pmd(x) (x)
89#define __pgd(x) (x)
90#define __pgprot(x) (x)
91
92#endif /* STRICT_MM_TYPECHECKS */
93
94#endif /* !__ASSEMBLY__ */
95
96
97/* to align the pointer to the (next) page boundary */
98#define PAGE_ALIGN(addr) (((addr) + PAGE_SIZE - 1) & PAGE_MASK)
99
100
101/* No current v850 processor has virtual memory. */
102#define __virt_to_phys(addr) (addr)
103#define __phys_to_virt(addr) (addr)
104
105#define virt_to_pfn(kaddr) (__virt_to_phys (kaddr) >> PAGE_SHIFT)
106#define pfn_to_virt(pfn) __phys_to_virt ((pfn) << PAGE_SHIFT)
107
108#define MAP_NR(kaddr) \
109 (((unsigned long)(kaddr) - PAGE_OFFSET) >> PAGE_SHIFT)
110#define virt_to_page(kaddr) (mem_map + MAP_NR (kaddr))
111#define page_to_virt(page) \
112 ((((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET)
113
114#define pfn_to_page(pfn) virt_to_page (pfn_to_virt (pfn))
115#define page_to_pfn(page) virt_to_pfn (page_to_virt (page))
116#define pfn_valid(pfn) ((pfn) < max_mapnr)
117
118#define virt_addr_valid(kaddr) \
119 (((void *)(kaddr) >= (void *)PAGE_OFFSET) && MAP_NR (kaddr) < max_mapnr)
120
121
122#define __pa(x) __virt_to_phys ((unsigned long)(x))
123#define __va(x) ((void *)__phys_to_virt ((unsigned long)(x)))
124
125
126#endif /* KERNEL */
127
128#include <asm-generic/page.h>
129
130#endif /* __V850_PAGE_H__ */