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1da177e4 LT |
1 | /* |
2 | * include/asm-v850/page.h -- VM ops | |
3 | * | |
e9c3d6b9 MB |
4 | * Copyright (C) 2001,02,03,05 NEC Electronics Corporation |
5 | * Copyright (C) 2001,02,03,05 Miles Bader <miles@gnu.org> | |
1da177e4 LT |
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 | ||
1da177e4 LT |
35 | #ifndef __ASSEMBLY__ |
36 | ||
37 | #define STRICT_MM_TYPECHECKS | |
38 | ||
39 | #define clear_page(page) memset ((void *)(page), 0, PAGE_SIZE) | |
40 | #define copy_page(to, from) memcpy ((void *)(to), (void *)from, PAGE_SIZE) | |
41 | ||
42 | #define clear_user_page(addr, vaddr, page) \ | |
43 | do { clear_page(addr); \ | |
44 | flush_dcache_page(page); \ | |
45 | } while (0) | |
46 | #define copy_user_page(to, from, vaddr, page) \ | |
47 | do { copy_page(to, from); \ | |
48 | flush_dcache_page(page); \ | |
49 | } while (0) | |
50 | ||
51 | #ifdef STRICT_MM_TYPECHECKS | |
52 | /* | |
53 | * These are used to make use of C type-checking.. | |
54 | */ | |
55 | ||
56 | typedef struct { unsigned long pte; } pte_t; | |
57 | typedef struct { unsigned long pmd; } pmd_t; | |
58 | typedef struct { unsigned long pgd; } pgd_t; | |
59 | typedef struct { unsigned long pgprot; } pgprot_t; | |
257ce734 | 60 | typedef struct page *pgtable_t; |
1da177e4 LT |
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 | ||
77 | typedef unsigned long pte_t; | |
78 | typedef unsigned long pmd_t; | |
79 | typedef unsigned long pgd_t; | |
80 | typedef 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 | ||
1da177e4 LT |
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 | ||
e6009f1b | 114 | #define ARCH_PFN_OFFSET (PAGE_OFFSET >> PAGE_SHIFT) |
e9c3d6b9 | 115 | #define pfn_valid(pfn) ((pfn) < max_mapnr) |
1da177e4 LT |
116 | |
117 | #define virt_addr_valid(kaddr) \ | |
118 | (((void *)(kaddr) >= (void *)PAGE_OFFSET) && MAP_NR (kaddr) < max_mapnr) | |
119 | ||
120 | ||
121 | #define __pa(x) __virt_to_phys ((unsigned long)(x)) | |
122 | #define __va(x) ((void *)__phys_to_virt ((unsigned long)(x))) | |
123 | ||
124 | ||
e6009f1b | 125 | #include <asm-generic/memory_model.h> |
fd4fd5aa SR |
126 | #include <asm-generic/page.h> |
127 | ||
1da177e4 | 128 | #endif /* __V850_PAGE_H__ */ |