]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * This file is subject to the terms and conditions of the GNU General Public | |
3 | * License. See the file "COPYING" in the main directory of this archive | |
4 | * for more details. | |
5 | * | |
6 | * Copyright (C) 1994 - 1999, 2000, 03 Ralf Baechle | |
7 | * Copyright (C) 1999, 2000 Silicon Graphics, Inc. | |
8 | */ | |
9 | #ifndef _ASM_PAGE_H | |
10 | #define _ASM_PAGE_H | |
11 | ||
12 | #include <linux/config.h> | |
13 | ||
14 | #ifdef __KERNEL__ | |
15 | ||
16 | #include <spaces.h> | |
17 | ||
18 | #endif | |
19 | ||
20 | /* | |
21 | * PAGE_SHIFT determines the page size | |
22 | */ | |
23 | #ifdef CONFIG_PAGE_SIZE_4KB | |
24 | #define PAGE_SHIFT 12 | |
25 | #endif | |
26 | #ifdef CONFIG_PAGE_SIZE_8KB | |
27 | #define PAGE_SHIFT 13 | |
28 | #endif | |
29 | #ifdef CONFIG_PAGE_SIZE_16KB | |
30 | #define PAGE_SHIFT 14 | |
31 | #endif | |
32 | #ifdef CONFIG_PAGE_SIZE_64KB | |
33 | #define PAGE_SHIFT 16 | |
34 | #endif | |
35 | #define PAGE_SIZE (1UL << PAGE_SHIFT) | |
36 | #define PAGE_MASK (~((1 << PAGE_SHIFT) - 1)) | |
37 | ||
38 | ||
39 | #ifdef __KERNEL__ | |
40 | #ifndef __ASSEMBLY__ | |
41 | ||
42 | extern void clear_page(void * page); | |
43 | extern void copy_page(void * to, void * from); | |
44 | ||
45 | extern unsigned long shm_align_mask; | |
46 | ||
47 | static inline unsigned long pages_do_alias(unsigned long addr1, | |
48 | unsigned long addr2) | |
49 | { | |
50 | return (addr1 ^ addr2) & shm_align_mask; | |
51 | } | |
52 | ||
53 | struct page; | |
54 | ||
55 | static inline void clear_user_page(void *addr, unsigned long vaddr, | |
56 | struct page *page) | |
57 | { | |
58 | extern void (*flush_data_cache_page)(unsigned long addr); | |
59 | ||
60 | clear_page(addr); | |
61 | if (pages_do_alias((unsigned long) addr, vaddr)) | |
62 | flush_data_cache_page((unsigned long)addr); | |
63 | } | |
64 | ||
65 | static inline void copy_user_page(void *vto, void *vfrom, unsigned long vaddr, | |
66 | struct page *to) | |
67 | { | |
68 | extern void (*flush_data_cache_page)(unsigned long addr); | |
69 | ||
70 | copy_page(vto, vfrom); | |
71 | if (pages_do_alias((unsigned long)vto, vaddr)) | |
72 | flush_data_cache_page((unsigned long)vto); | |
73 | } | |
74 | ||
75 | /* | |
76 | * These are used to make use of C type-checking.. | |
77 | */ | |
78 | #ifdef CONFIG_64BIT_PHYS_ADDR | |
79 | #ifdef CONFIG_CPU_MIPS32 | |
80 | typedef struct { unsigned long pte_low, pte_high; } pte_t; | |
81 | #define pte_val(x) ((x).pte_low | ((unsigned long long)(x).pte_high << 32)) | |
82 | #else | |
83 | typedef struct { unsigned long long pte; } pte_t; | |
84 | #define pte_val(x) ((x).pte) | |
85 | #endif | |
86 | #else | |
87 | typedef struct { unsigned long pte; } pte_t; | |
88 | #define pte_val(x) ((x).pte) | |
89 | #endif | |
90 | ||
91 | typedef struct { unsigned long pmd; } pmd_t; | |
92 | typedef struct { unsigned long pgd; } pgd_t; | |
93 | typedef struct { unsigned long pgprot; } pgprot_t; | |
94 | ||
95 | #define pmd_val(x) ((x).pmd) | |
96 | #define pgd_val(x) ((x).pgd) | |
97 | #define pgprot_val(x) ((x).pgprot) | |
98 | ||
99 | #define ptep_buddy(x) ((pte_t *)((unsigned long)(x) ^ sizeof(pte_t))) | |
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 | /* Pure 2^n version of get_order */ | |
107 | static __inline__ int get_order(unsigned long size) | |
108 | { | |
109 | int order; | |
110 | ||
111 | size = (size-1) >> (PAGE_SHIFT-1); | |
112 | order = -1; | |
113 | do { | |
114 | size >>= 1; | |
115 | order++; | |
116 | } while (size); | |
117 | return order; | |
118 | } | |
119 | ||
120 | #endif /* !__ASSEMBLY__ */ | |
121 | ||
122 | /* to align the pointer to the (next) page boundary */ | |
123 | #define PAGE_ALIGN(addr) (((addr) + PAGE_SIZE - 1) & PAGE_MASK) | |
124 | ||
125 | #define __pa(x) ((unsigned long) (x) - PAGE_OFFSET) | |
126 | #define __va(x) ((void *)((unsigned long) (x) + PAGE_OFFSET)) | |
127 | ||
128 | #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) | |
129 | ||
130 | #ifndef CONFIG_DISCONTIGMEM | |
131 | #define pfn_to_page(pfn) (mem_map + (pfn)) | |
132 | #define page_to_pfn(page) ((unsigned long)((page) - mem_map)) | |
133 | #define pfn_valid(pfn) ((pfn) < max_mapnr) | |
134 | #endif | |
135 | ||
136 | #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) | |
137 | #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) | |
138 | ||
139 | #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ | |
140 | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) | |
141 | ||
142 | #define UNCAC_ADDR(addr) ((addr) - PAGE_OFFSET + UNCAC_BASE) | |
143 | #define CAC_ADDR(addr) ((addr) - UNCAC_BASE + PAGE_OFFSET) | |
144 | ||
145 | #endif /* defined (__KERNEL__) */ | |
146 | ||
147 | #ifdef CONFIG_LIMITED_DMA | |
148 | #define WANT_PAGE_VIRTUAL | |
149 | #endif | |
150 | ||
151 | #endif /* _ASM_PAGE_H */ |