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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 | |
14 | /* PAGE_SHIFT determines the page size */ | |
15 | #define PAGE_SHIFT 12 | |
16 | #define PAGE_SIZE (1UL << PAGE_SHIFT) | |
17 | #define PAGE_MASK (~(PAGE_SIZE-1)) | |
18 | ||
19 | #ifdef __KERNEL__ | |
20 | ||
21 | /* to align the pointer to the (next) page boundary */ | |
22 | #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK) | |
23 | ||
24 | #ifndef __ASSEMBLY__ | |
25 | ||
002547b4 RK |
26 | #ifndef CONFIG_MMU |
27 | ||
28 | #include "page-nommu.h" | |
29 | ||
30 | #else | |
31 | ||
1da177e4 LT |
32 | #include <asm/glue.h> |
33 | ||
34 | /* | |
35 | * User Space Model | |
36 | * ================ | |
37 | * | |
38 | * This section selects the correct set of functions for dealing with | |
39 | * page-based copying and clearing for user space for the particular | |
40 | * processor(s) we're building for. | |
41 | * | |
42 | * We have the following to choose from: | |
43 | * v3 - ARMv3 | |
44 | * v4wt - ARMv4 with writethrough cache, without minicache | |
45 | * v4wb - ARMv4 with writeback cache, without minicache | |
46 | * v4_mc - ARMv4 with minicache | |
47 | * xscale - Xscale | |
23bdf86a | 48 | * xsc3 - XScalev3 |
1da177e4 LT |
49 | */ |
50 | #undef _USER | |
51 | #undef MULTI_USER | |
52 | ||
53 | #ifdef CONFIG_CPU_COPY_V3 | |
54 | # ifdef _USER | |
55 | # define MULTI_USER 1 | |
56 | # else | |
57 | # define _USER v3 | |
58 | # endif | |
59 | #endif | |
60 | ||
61 | #ifdef CONFIG_CPU_COPY_V4WT | |
62 | # ifdef _USER | |
63 | # define MULTI_USER 1 | |
64 | # else | |
65 | # define _USER v4wt | |
66 | # endif | |
67 | #endif | |
68 | ||
69 | #ifdef CONFIG_CPU_COPY_V4WB | |
70 | # ifdef _USER | |
71 | # define MULTI_USER 1 | |
72 | # else | |
73 | # define _USER v4wb | |
74 | # endif | |
75 | #endif | |
76 | ||
77 | #ifdef CONFIG_CPU_SA1100 | |
78 | # ifdef _USER | |
79 | # define MULTI_USER 1 | |
80 | # else | |
81 | # define _USER v4_mc | |
82 | # endif | |
83 | #endif | |
84 | ||
85 | #ifdef CONFIG_CPU_XSCALE | |
86 | # ifdef _USER | |
87 | # define MULTI_USER 1 | |
88 | # else | |
89 | # define _USER xscale_mc | |
90 | # endif | |
91 | #endif | |
92 | ||
23bdf86a LB |
93 | #ifdef CONFIG_CPU_XSC3 |
94 | # ifdef _USER | |
95 | # define MULTI_USER 1 | |
96 | # else | |
97 | # define _USER xsc3_mc | |
98 | # endif | |
99 | #endif | |
100 | ||
1da177e4 LT |
101 | #ifdef CONFIG_CPU_COPY_V6 |
102 | # define MULTI_USER 1 | |
103 | #endif | |
104 | ||
105 | #if !defined(_USER) && !defined(MULTI_USER) | |
106 | #error Unknown user operations model | |
107 | #endif | |
108 | ||
109 | struct cpu_user_fns { | |
110 | void (*cpu_clear_user_page)(void *p, unsigned long user); | |
111 | void (*cpu_copy_user_page)(void *to, const void *from, | |
112 | unsigned long user); | |
113 | }; | |
114 | ||
115 | #ifdef MULTI_USER | |
116 | extern struct cpu_user_fns cpu_user; | |
117 | ||
118 | #define __cpu_clear_user_page cpu_user.cpu_clear_user_page | |
119 | #define __cpu_copy_user_page cpu_user.cpu_copy_user_page | |
120 | ||
121 | #else | |
122 | ||
123 | #define __cpu_clear_user_page __glue(_USER,_clear_user_page) | |
124 | #define __cpu_copy_user_page __glue(_USER,_copy_user_page) | |
125 | ||
126 | extern void __cpu_clear_user_page(void *p, unsigned long user); | |
127 | extern void __cpu_copy_user_page(void *to, const void *from, | |
128 | unsigned long user); | |
129 | #endif | |
130 | ||
d2bab05a RK |
131 | #define clear_user_page(addr,vaddr,pg) __cpu_clear_user_page(addr, vaddr) |
132 | #define copy_user_page(to,from,vaddr,pg) __cpu_copy_user_page(to, from, vaddr) | |
1da177e4 LT |
133 | |
134 | #define clear_page(page) memzero((void *)(page), PAGE_SIZE) | |
135 | extern void copy_page(void *to, const void *from); | |
136 | ||
137 | #undef STRICT_MM_TYPECHECKS | |
138 | ||
139 | #ifdef STRICT_MM_TYPECHECKS | |
140 | /* | |
141 | * These are used to make use of C type-checking.. | |
142 | */ | |
143 | typedef struct { unsigned long pte; } pte_t; | |
144 | typedef struct { unsigned long pmd; } pmd_t; | |
145 | typedef struct { unsigned long pgd[2]; } pgd_t; | |
146 | typedef struct { unsigned long pgprot; } pgprot_t; | |
147 | ||
148 | #define pte_val(x) ((x).pte) | |
149 | #define pmd_val(x) ((x).pmd) | |
150 | #define pgd_val(x) ((x).pgd[0]) | |
151 | #define pgprot_val(x) ((x).pgprot) | |
152 | ||
153 | #define __pte(x) ((pte_t) { (x) } ) | |
154 | #define __pmd(x) ((pmd_t) { (x) } ) | |
155 | #define __pgprot(x) ((pgprot_t) { (x) } ) | |
156 | ||
157 | #else | |
158 | /* | |
159 | * .. while these make it easier on the compiler | |
160 | */ | |
161 | typedef unsigned long pte_t; | |
162 | typedef unsigned long pmd_t; | |
163 | typedef unsigned long pgd_t[2]; | |
164 | typedef unsigned long pgprot_t; | |
165 | ||
166 | #define pte_val(x) (x) | |
167 | #define pmd_val(x) (x) | |
168 | #define pgd_val(x) ((x)[0]) | |
169 | #define pgprot_val(x) (x) | |
170 | ||
171 | #define __pte(x) (x) | |
172 | #define __pmd(x) (x) | |
173 | #define __pgprot(x) (x) | |
174 | ||
175 | #endif /* STRICT_MM_TYPECHECKS */ | |
176 | ||
c4e1f6f6 RK |
177 | /* the upper-most page table pointer */ |
178 | extern pmd_t *top_pmd; | |
179 | ||
002547b4 RK |
180 | #endif /* CONFIG_MMU */ |
181 | ||
1da177e4 LT |
182 | #include <asm/memory.h> |
183 | ||
184 | #endif /* !__ASSEMBLY__ */ | |
185 | ||
186 | #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ | |
187 | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) | |
188 | ||
da2b1cd6 NP |
189 | /* |
190 | * With EABI on ARMv5 and above we must have 64-bit aligned slab pointers. | |
191 | */ | |
192 | #if defined(CONFIG_AEABI) && (__LINUX_ARM_ARCH__ >= 5) | |
193 | #define ARCH_SLAB_MINALIGN 8 | |
194 | #endif | |
195 | ||
fd4fd5aa SR |
196 | #include <asm-generic/page.h> |
197 | ||
e40b1074 RS |
198 | #endif /* __KERNEL__ */ |
199 | ||
1da177e4 | 200 | #endif |