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d2912cb1 | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
1da177e4 | 2 | /* |
4baa9922 | 3 | * arch/arm/include/asm/page.h |
1da177e4 LT |
4 | * |
5 | * Copyright (C) 1995-2003 Russell King | |
1da177e4 LT |
6 | */ |
7 | #ifndef _ASMARM_PAGE_H | |
8 | #define _ASMARM_PAGE_H | |
9 | ||
1da177e4 LT |
10 | /* PAGE_SHIFT determines the page size */ |
11 | #define PAGE_SHIFT 12 | |
f6430a93 | 12 | #define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT) |
926edcc7 | 13 | #define PAGE_MASK (~((1 << PAGE_SHIFT) - 1)) |
1da177e4 | 14 | |
1da177e4 LT |
15 | #ifndef __ASSEMBLY__ |
16 | ||
002547b4 RK |
17 | #ifndef CONFIG_MMU |
18 | ||
a1ce3928 | 19 | #include <asm/page-nommu.h> |
002547b4 RK |
20 | |
21 | #else | |
22 | ||
1da177e4 LT |
23 | #include <asm/glue.h> |
24 | ||
25 | /* | |
26 | * User Space Model | |
27 | * ================ | |
28 | * | |
29 | * This section selects the correct set of functions for dealing with | |
30 | * page-based copying and clearing for user space for the particular | |
31 | * processor(s) we're building for. | |
32 | * | |
33 | * We have the following to choose from: | |
1da177e4 LT |
34 | * v4wt - ARMv4 with writethrough cache, without minicache |
35 | * v4wb - ARMv4 with writeback cache, without minicache | |
36 | * v4_mc - ARMv4 with minicache | |
37 | * xscale - Xscale | |
23bdf86a | 38 | * xsc3 - XScalev3 |
1da177e4 LT |
39 | */ |
40 | #undef _USER | |
41 | #undef MULTI_USER | |
42 | ||
1da177e4 LT |
43 | #ifdef CONFIG_CPU_COPY_V4WT |
44 | # ifdef _USER | |
45 | # define MULTI_USER 1 | |
46 | # else | |
47 | # define _USER v4wt | |
48 | # endif | |
49 | #endif | |
50 | ||
51 | #ifdef CONFIG_CPU_COPY_V4WB | |
52 | # ifdef _USER | |
53 | # define MULTI_USER 1 | |
54 | # else | |
55 | # define _USER v4wb | |
56 | # endif | |
57 | #endif | |
58 | ||
0ed15071 LB |
59 | #ifdef CONFIG_CPU_COPY_FEROCEON |
60 | # ifdef _USER | |
61 | # define MULTI_USER 1 | |
62 | # else | |
63 | # define _USER feroceon | |
64 | # endif | |
65 | #endif | |
66 | ||
28853ac8 PZ |
67 | #ifdef CONFIG_CPU_COPY_FA |
68 | # ifdef _USER | |
69 | # define MULTI_USER 1 | |
70 | # else | |
71 | # define _USER fa | |
72 | # endif | |
73 | #endif | |
74 | ||
1da177e4 LT |
75 | #ifdef CONFIG_CPU_SA1100 |
76 | # ifdef _USER | |
77 | # define MULTI_USER 1 | |
78 | # else | |
79 | # define _USER v4_mc | |
80 | # endif | |
81 | #endif | |
82 | ||
83 | #ifdef CONFIG_CPU_XSCALE | |
84 | # ifdef _USER | |
85 | # define MULTI_USER 1 | |
86 | # else | |
87 | # define _USER xscale_mc | |
88 | # endif | |
89 | #endif | |
90 | ||
23bdf86a LB |
91 | #ifdef CONFIG_CPU_XSC3 |
92 | # ifdef _USER | |
93 | # define MULTI_USER 1 | |
94 | # else | |
95 | # define _USER xsc3_mc | |
96 | # endif | |
97 | #endif | |
98 | ||
1da177e4 LT |
99 | #ifdef CONFIG_CPU_COPY_V6 |
100 | # define MULTI_USER 1 | |
101 | #endif | |
102 | ||
103 | #if !defined(_USER) && !defined(MULTI_USER) | |
104 | #error Unknown user operations model | |
105 | #endif | |
106 | ||
063b0a42 | 107 | struct page; |
f00a75c0 | 108 | struct vm_area_struct; |
063b0a42 | 109 | |
1da177e4 | 110 | struct cpu_user_fns { |
303c6443 | 111 | void (*cpu_clear_user_highpage)(struct page *page, unsigned long vaddr); |
063b0a42 | 112 | void (*cpu_copy_user_highpage)(struct page *to, struct page *from, |
f00a75c0 | 113 | unsigned long vaddr, struct vm_area_struct *vma); |
1da177e4 LT |
114 | }; |
115 | ||
116 | #ifdef MULTI_USER | |
117 | extern struct cpu_user_fns cpu_user; | |
118 | ||
303c6443 | 119 | #define __cpu_clear_user_highpage cpu_user.cpu_clear_user_highpage |
063b0a42 | 120 | #define __cpu_copy_user_highpage cpu_user.cpu_copy_user_highpage |
1da177e4 LT |
121 | |
122 | #else | |
123 | ||
303c6443 | 124 | #define __cpu_clear_user_highpage __glue(_USER,_clear_user_highpage) |
063b0a42 | 125 | #define __cpu_copy_user_highpage __glue(_USER,_copy_user_highpage) |
1da177e4 | 126 | |
303c6443 | 127 | extern void __cpu_clear_user_highpage(struct page *page, unsigned long vaddr); |
063b0a42 | 128 | extern void __cpu_copy_user_highpage(struct page *to, struct page *from, |
f00a75c0 | 129 | unsigned long vaddr, struct vm_area_struct *vma); |
1da177e4 LT |
130 | #endif |
131 | ||
303c6443 RK |
132 | #define clear_user_highpage(page,vaddr) \ |
133 | __cpu_clear_user_highpage(page, vaddr) | |
063b0a42 RK |
134 | |
135 | #define __HAVE_ARCH_COPY_USER_HIGHPAGE | |
136 | #define copy_user_highpage(to,from,vaddr,vma) \ | |
f00a75c0 | 137 | __cpu_copy_user_highpage(to, from, vaddr, vma) |
1da177e4 | 138 | |
59f0cb0f | 139 | #define clear_page(page) memset((void *)(page), 0, PAGE_SIZE) |
1da177e4 LT |
140 | extern void copy_page(void *to, const void *from); |
141 | ||
a5463cd3 | 142 | #ifdef CONFIG_KUSER_HELPERS |
f9d4861f | 143 | #define __HAVE_ARCH_GATE_AREA 1 |
a5463cd3 | 144 | #endif |
f9d4861f | 145 | |
dcfdae04 CM |
146 | #ifdef CONFIG_ARM_LPAE |
147 | #include <asm/pgtable-3level-types.h> | |
148 | #else | |
17f57211 | 149 | #include <asm/pgtable-2level-types.h> |
dcfdae04 | 150 | #endif |
1da177e4 | 151 | |
002547b4 RK |
152 | #endif /* CONFIG_MMU */ |
153 | ||
50346e62 GU |
154 | typedef struct page *pgtable_t; |
155 | ||
7b7bf499 | 156 | #ifdef CONFIG_HAVE_ARCH_PFN_VALID |
b7cfda9f RK |
157 | extern int pfn_valid(unsigned long); |
158 | #endif | |
159 | ||
1da177e4 LT |
160 | #include <asm/memory.h> |
161 | ||
162 | #endif /* !__ASSEMBLY__ */ | |
163 | ||
c62da0c3 | 164 | #define VM_DATA_DEFAULT_FLAGS VM_DATA_FLAGS_TSK_EXEC |
1da177e4 | 165 | |
5b17e1cd | 166 | #include <asm-generic/getorder.h> |
fd4fd5aa | 167 | |
1da177e4 | 168 | #endif |