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Linux kernel mirror (for testing)
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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#ifdef __KERNEL__
18
19#include <asm/machdep.h>
20
21
22#define PAGE_SHIFT 12
23#define PAGE_SIZE (1UL << PAGE_SHIFT)
24#define PAGE_MASK (~(PAGE_SIZE-1))
25
26
27/*
28 * PAGE_OFFSET -- the first address of the first page of memory. For archs with
29 * no MMU this corresponds to the first free page in physical memory (aligned
30 * on a page boundary).
31 */
32#ifndef PAGE_OFFSET
33#define PAGE_OFFSET 0x0000000
34#endif
35
36
37#ifndef __ASSEMBLY__
38
39#define STRICT_MM_TYPECHECKS
40
41#define clear_page(page) memset ((void *)(page), 0, PAGE_SIZE)
42#define copy_page(to, from) memcpy ((void *)(to), (void *)from, PAGE_SIZE)
43
44#define clear_user_page(addr, vaddr, page) \
45 do { clear_page(addr); \
46 flush_dcache_page(page); \
47 } while (0)
48#define copy_user_page(to, from, vaddr, page) \
49 do { copy_page(to, from); \
50 flush_dcache_page(page); \
51 } while (0)
52
53#ifdef STRICT_MM_TYPECHECKS
54/*
55 * These are used to make use of C type-checking..
56 */
57
58typedef struct { unsigned long pte; } pte_t;
59typedef struct { unsigned long pmd; } pmd_t;
60typedef struct { unsigned long pgd; } pgd_t;
61typedef struct { unsigned long pgprot; } pgprot_t;
62
63#define pte_val(x) ((x).pte)
64#define pmd_val(x) ((x).pmd)
65#define pgd_val(x) ((x).pgd)
66#define pgprot_val(x) ((x).pgprot)
67
68#define __pte(x) ((pte_t) { (x) } )
69#define __pmd(x) ((pmd_t) { (x) } )
70#define __pgd(x) ((pgd_t) { (x) } )
71#define __pgprot(x) ((pgprot_t) { (x) } )
72
73#else /* !STRICT_MM_TYPECHECKS */
74/*
75 * .. while these make it easier on the compiler
76 */
77
78typedef unsigned long pte_t;
79typedef unsigned long pmd_t;
80typedef unsigned long pgd_t;
81typedef unsigned long pgprot_t;
82
83#define pte_val(x) (x)
84#define pmd_val(x) (x)
85#define pgd_val(x) (x)
86#define pgprot_val(x) (x)
87
88#define __pte(x) (x)
89#define __pmd(x) (x)
90#define __pgd(x) (x)
91#define __pgprot(x) (x)
92
93#endif /* STRICT_MM_TYPECHECKS */
94
95#endif /* !__ASSEMBLY__ */
96
97
98/* to align the pointer to the (next) page boundary */
99#define PAGE_ALIGN(addr) (((addr) + PAGE_SIZE - 1) & PAGE_MASK)
100
101
102/* No current v850 processor has virtual memory. */
103#define __virt_to_phys(addr) (addr)
104#define __phys_to_virt(addr) (addr)
105
106#define virt_to_pfn(kaddr) (__virt_to_phys (kaddr) >> PAGE_SHIFT)
107#define pfn_to_virt(pfn) __phys_to_virt ((pfn) << PAGE_SHIFT)
108
109#define MAP_NR(kaddr) \
110 (((unsigned long)(kaddr) - PAGE_OFFSET) >> PAGE_SHIFT)
111#define virt_to_page(kaddr) (mem_map + MAP_NR (kaddr))
112#define page_to_virt(page) \
113 ((((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET)
114
115#define ARCH_PFN_OFFSET (PAGE_OFFSET >> PAGE_SHIFT)
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#include <asm-generic/memory_model.h>
127#include <asm-generic/page.h>
128
129#endif /* KERNEL */
130
131#endif /* __V850_PAGE_H__ */