1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3 * arch/arm/include/asm/page.h
4 *
5 * Copyright (C) 1995-2003 Russell King
6 */
7 #ifndef _ASMARM_PAGE_H
8 #define _ASMARM_PAGE_H
9
10 /* PAGE_SHIFT determines the page size */
11 #define PAGE_SHIFT CONFIG_PAGE_SHIFT
12 #define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT)
13 #define PAGE_MASK (~((1 << PAGE_SHIFT) - 1))
14
15 #ifndef __ASSEMBLY__
16
17 #ifndef CONFIG_MMU
18
19 #include <asm/page-nommu.h>
20
21 #else
22
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:
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
38 * xsc3 - XScalev3
39 */
40 #undef _USER
41 #undef MULTI_USER
42
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
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
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
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
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
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
107 struct page;
108 struct vm_area_struct;
109
110 struct cpu_user_fns {
111 void (*cpu_clear_user_highpage)(struct page *page, unsigned long vaddr);
112 void (*cpu_copy_user_highpage)(struct page *to, struct page *from,
113 unsigned long vaddr, struct vm_area_struct *vma);
114 };
115
116 void fa_copy_user_highpage(struct page *to, struct page *from,
117 unsigned long vaddr, struct vm_area_struct *vma);
118 void fa_clear_user_highpage(struct page *page, unsigned long vaddr);
119 void feroceon_copy_user_highpage(struct page *to, struct page *from,
120 unsigned long vaddr, struct vm_area_struct *vma);
121 void feroceon_clear_user_highpage(struct page *page, unsigned long vaddr);
122 void v4_mc_copy_user_highpage(struct page *to, struct page *from,
123 unsigned long vaddr, struct vm_area_struct *vma);
124 void v4_mc_clear_user_highpage(struct page *page, unsigned long vaddr);
125 void v4wb_copy_user_highpage(struct page *to, struct page *from,
126 unsigned long vaddr, struct vm_area_struct *vma);
127 void v4wb_clear_user_highpage(struct page *page, unsigned long vaddr);
128 void v4wt_copy_user_highpage(struct page *to, struct page *from,
129 unsigned long vaddr, struct vm_area_struct *vma);
130 void v4wt_clear_user_highpage(struct page *page, unsigned long vaddr);
131 void xsc3_mc_copy_user_highpage(struct page *to, struct page *from,
132 unsigned long vaddr, struct vm_area_struct *vma);
133 void xsc3_mc_clear_user_highpage(struct page *page, unsigned long vaddr);
134 void xscale_mc_copy_user_highpage(struct page *to, struct page *from,
135 unsigned long vaddr, struct vm_area_struct *vma);
136 void xscale_mc_clear_user_highpage(struct page *page, unsigned long vaddr);
137
138 #ifdef MULTI_USER
139 extern struct cpu_user_fns cpu_user;
140
141 #define __cpu_clear_user_highpage cpu_user.cpu_clear_user_highpage
142 #define __cpu_copy_user_highpage cpu_user.cpu_copy_user_highpage
143
144 #else
145
146 #define __cpu_clear_user_highpage __glue(_USER,_clear_user_highpage)
147 #define __cpu_copy_user_highpage __glue(_USER,_copy_user_highpage)
148
149 extern void __cpu_clear_user_highpage(struct page *page, unsigned long vaddr);
150 extern void __cpu_copy_user_highpage(struct page *to, struct page *from,
151 unsigned long vaddr, struct vm_area_struct *vma);
152 #endif
153
154 #define clear_user_highpage(page,vaddr) \
155 __cpu_clear_user_highpage(page, vaddr)
156
157 #define __HAVE_ARCH_COPY_USER_HIGHPAGE
158 #define copy_user_highpage(to,from,vaddr,vma) \
159 __cpu_copy_user_highpage(to, from, vaddr, vma)
160
161 #define clear_page(page) memset((void *)(page), 0, PAGE_SIZE)
162 extern void copy_page(void *to, const void *from);
163
164 #ifdef CONFIG_KUSER_HELPERS
165 #define __HAVE_ARCH_GATE_AREA 1
166 #endif
167
168 #ifdef CONFIG_ARM_LPAE
169 #include <asm/pgtable-3level-types.h>
170 #else
171 #include <asm/pgtable-2level-types.h>
172 #ifdef CONFIG_VMAP_STACK
173 #define ARCH_PAGE_TABLE_SYNC_MASK PGTBL_PMD_MODIFIED
174 #endif
175 #endif
176
177 #endif /* CONFIG_MMU */
178
179 typedef struct page *pgtable_t;
180
181 #ifdef CONFIG_HAVE_ARCH_PFN_VALID
182 extern int pfn_valid(unsigned long);
183 #define pfn_valid pfn_valid
184 #endif
185
186 #endif /* !__ASSEMBLY__ */
187
188 #include <asm/memory.h>
189
190 #define VM_DATA_DEFAULT_FLAGS VM_DATA_FLAGS_TSK_EXEC
191
192 #include <asm-generic/getorder.h>
193 #include <asm-generic/memory_model.h>
194
195 #endif
196
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