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1da177e4 LT |
1 | /* |
2 | * linux/include/asm-arm/page.h | |
3 | * | |
4 | * Copyright (C) 1995-2003 Russell King | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | */ | |
10 | #ifndef _ASMARM_PAGE_H | |
11 | #define _ASMARM_PAGE_H | |
12 | ||
1da177e4 LT |
13 | /* PAGE_SHIFT determines the page size */ |
14 | #define PAGE_SHIFT 12 | |
15 | #define PAGE_SIZE (1UL << PAGE_SHIFT) | |
16 | #define PAGE_MASK (~(PAGE_SIZE-1)) | |
17 | ||
1da177e4 LT |
18 | /* to align the pointer to the (next) page boundary */ |
19 | #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK) | |
20 | ||
21 | #ifndef __ASSEMBLY__ | |
22 | ||
002547b4 RK |
23 | #ifndef CONFIG_MMU |
24 | ||
25 | #include "page-nommu.h" | |
26 | ||
27 | #else | |
28 | ||
1da177e4 LT |
29 | #include <asm/glue.h> |
30 | ||
31 | /* | |
32 | * User Space Model | |
33 | * ================ | |
34 | * | |
35 | * This section selects the correct set of functions for dealing with | |
36 | * page-based copying and clearing for user space for the particular | |
37 | * processor(s) we're building for. | |
38 | * | |
39 | * We have the following to choose from: | |
40 | * v3 - ARMv3 | |
41 | * v4wt - ARMv4 with writethrough cache, without minicache | |
42 | * v4wb - ARMv4 with writeback cache, without minicache | |
43 | * v4_mc - ARMv4 with minicache | |
44 | * xscale - Xscale | |
23bdf86a | 45 | * xsc3 - XScalev3 |
1da177e4 LT |
46 | */ |
47 | #undef _USER | |
48 | #undef MULTI_USER | |
49 | ||
50 | #ifdef CONFIG_CPU_COPY_V3 | |
51 | # ifdef _USER | |
52 | # define MULTI_USER 1 | |
53 | # else | |
54 | # define _USER v3 | |
55 | # endif | |
56 | #endif | |
57 | ||
58 | #ifdef CONFIG_CPU_COPY_V4WT | |
59 | # ifdef _USER | |
60 | # define MULTI_USER 1 | |
61 | # else | |
62 | # define _USER v4wt | |
63 | # endif | |
64 | #endif | |
65 | ||
66 | #ifdef CONFIG_CPU_COPY_V4WB | |
67 | # ifdef _USER | |
68 | # define MULTI_USER 1 | |
69 | # else | |
70 | # define _USER v4wb | |
71 | # endif | |
72 | #endif | |
73 | ||
0ed15071 LB |
74 | #ifdef CONFIG_CPU_COPY_FEROCEON |
75 | # ifdef _USER | |
76 | # define MULTI_USER 1 | |
77 | # else | |
78 | # define _USER feroceon | |
79 | # endif | |
80 | #endif | |
81 | ||
1da177e4 LT |
82 | #ifdef CONFIG_CPU_SA1100 |
83 | # ifdef _USER | |
84 | # define MULTI_USER 1 | |
85 | # else | |
86 | # define _USER v4_mc | |
87 | # endif | |
88 | #endif | |
89 | ||
90 | #ifdef CONFIG_CPU_XSCALE | |
91 | # ifdef _USER | |
92 | # define MULTI_USER 1 | |
93 | # else | |
94 | # define _USER xscale_mc | |
95 | # endif | |
96 | #endif | |
97 | ||
23bdf86a LB |
98 | #ifdef CONFIG_CPU_XSC3 |
99 | # ifdef _USER | |
100 | # define MULTI_USER 1 | |
101 | # else | |
102 | # define _USER xsc3_mc | |
103 | # endif | |
104 | #endif | |
105 | ||
1da177e4 LT |
106 | #ifdef CONFIG_CPU_COPY_V6 |
107 | # define MULTI_USER 1 | |
108 | #endif | |
109 | ||
110 | #if !defined(_USER) && !defined(MULTI_USER) | |
111 | #error Unknown user operations model | |
112 | #endif | |
113 | ||
114 | struct cpu_user_fns { | |
115 | void (*cpu_clear_user_page)(void *p, unsigned long user); | |
116 | void (*cpu_copy_user_page)(void *to, const void *from, | |
117 | unsigned long user); | |
118 | }; | |
119 | ||
120 | #ifdef MULTI_USER | |
121 | extern struct cpu_user_fns cpu_user; | |
122 | ||
123 | #define __cpu_clear_user_page cpu_user.cpu_clear_user_page | |
124 | #define __cpu_copy_user_page cpu_user.cpu_copy_user_page | |
125 | ||
126 | #else | |
127 | ||
128 | #define __cpu_clear_user_page __glue(_USER,_clear_user_page) | |
129 | #define __cpu_copy_user_page __glue(_USER,_copy_user_page) | |
130 | ||
131 | extern void __cpu_clear_user_page(void *p, unsigned long user); | |
132 | extern void __cpu_copy_user_page(void *to, const void *from, | |
133 | unsigned long user); | |
134 | #endif | |
135 | ||
d2bab05a RK |
136 | #define clear_user_page(addr,vaddr,pg) __cpu_clear_user_page(addr, vaddr) |
137 | #define copy_user_page(to,from,vaddr,pg) __cpu_copy_user_page(to, from, vaddr) | |
1da177e4 LT |
138 | |
139 | #define clear_page(page) memzero((void *)(page), PAGE_SIZE) | |
140 | extern void copy_page(void *to, const void *from); | |
141 | ||
142 | #undef STRICT_MM_TYPECHECKS | |
143 | ||
144 | #ifdef STRICT_MM_TYPECHECKS | |
145 | /* | |
146 | * These are used to make use of C type-checking.. | |
147 | */ | |
148 | typedef struct { unsigned long pte; } pte_t; | |
149 | typedef struct { unsigned long pmd; } pmd_t; | |
150 | typedef struct { unsigned long pgd[2]; } pgd_t; | |
151 | typedef struct { unsigned long pgprot; } pgprot_t; | |
152 | ||
153 | #define pte_val(x) ((x).pte) | |
154 | #define pmd_val(x) ((x).pmd) | |
155 | #define pgd_val(x) ((x).pgd[0]) | |
156 | #define pgprot_val(x) ((x).pgprot) | |
157 | ||
158 | #define __pte(x) ((pte_t) { (x) } ) | |
159 | #define __pmd(x) ((pmd_t) { (x) } ) | |
160 | #define __pgprot(x) ((pgprot_t) { (x) } ) | |
161 | ||
162 | #else | |
163 | /* | |
164 | * .. while these make it easier on the compiler | |
165 | */ | |
166 | typedef unsigned long pte_t; | |
167 | typedef unsigned long pmd_t; | |
168 | typedef unsigned long pgd_t[2]; | |
169 | typedef unsigned long pgprot_t; | |
170 | ||
171 | #define pte_val(x) (x) | |
172 | #define pmd_val(x) (x) | |
173 | #define pgd_val(x) ((x)[0]) | |
174 | #define pgprot_val(x) (x) | |
175 | ||
176 | #define __pte(x) (x) | |
177 | #define __pmd(x) (x) | |
178 | #define __pgprot(x) (x) | |
179 | ||
180 | #endif /* STRICT_MM_TYPECHECKS */ | |
181 | ||
2f569afd MS |
182 | typedef struct page *pgtable_t; |
183 | ||
002547b4 RK |
184 | #endif /* CONFIG_MMU */ |
185 | ||
1da177e4 LT |
186 | #include <asm/memory.h> |
187 | ||
188 | #endif /* !__ASSEMBLY__ */ | |
189 | ||
190 | #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ | |
191 | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) | |
192 | ||
da2b1cd6 NP |
193 | /* |
194 | * With EABI on ARMv5 and above we must have 64-bit aligned slab pointers. | |
195 | */ | |
196 | #if defined(CONFIG_AEABI) && (__LINUX_ARM_ARCH__ >= 5) | |
197 | #define ARCH_SLAB_MINALIGN 8 | |
198 | #endif | |
199 | ||
fd4fd5aa SR |
200 | #include <asm-generic/page.h> |
201 | ||
1da177e4 | 202 | #endif |