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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
107struct page;
108struct vm_area_struct;
109
110struct 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
116void fa_copy_user_highpage(struct page *to, struct page *from,
117 unsigned long vaddr, struct vm_area_struct *vma);
118void fa_clear_user_highpage(struct page *page, unsigned long vaddr);
119void feroceon_copy_user_highpage(struct page *to, struct page *from,
120 unsigned long vaddr, struct vm_area_struct *vma);
121void feroceon_clear_user_highpage(struct page *page, unsigned long vaddr);
122void v4_mc_copy_user_highpage(struct page *to, struct page *from,
123 unsigned long vaddr, struct vm_area_struct *vma);
124void v4_mc_clear_user_highpage(struct page *page, unsigned long vaddr);
125void v4wb_copy_user_highpage(struct page *to, struct page *from,
126 unsigned long vaddr, struct vm_area_struct *vma);
127void v4wb_clear_user_highpage(struct page *page, unsigned long vaddr);
128void v4wt_copy_user_highpage(struct page *to, struct page *from,
129 unsigned long vaddr, struct vm_area_struct *vma);
130void v4wt_clear_user_highpage(struct page *page, unsigned long vaddr);
131void xsc3_mc_copy_user_highpage(struct page *to, struct page *from,
132 unsigned long vaddr, struct vm_area_struct *vma);
133void xsc3_mc_clear_user_highpage(struct page *page, unsigned long vaddr);
134void xscale_mc_copy_user_highpage(struct page *to, struct page *from,
135 unsigned long vaddr, struct vm_area_struct *vma);
136void xscale_mc_clear_user_highpage(struct page *page, unsigned long vaddr);
137
138#ifdef MULTI_USER
139extern 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
149extern void __cpu_clear_user_highpage(struct page *page, unsigned long vaddr);
150extern 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)
162extern 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
179typedef struct page *pgtable_t;
180
181#ifdef CONFIG_HAVE_ARCH_PFN_VALID
182extern 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
1/*
2 * arch/arm/include/asm/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
13/* PAGE_SHIFT determines the page size */
14#define PAGE_SHIFT 12
15#define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT)
16#define PAGE_MASK (~((1 << PAGE_SHIFT) - 1))
17
18#ifndef __ASSEMBLY__
19
20#ifndef CONFIG_MMU
21
22#include <asm/page-nommu.h>
23
24#else
25
26#include <asm/glue.h>
27
28/*
29 * User Space Model
30 * ================
31 *
32 * This section selects the correct set of functions for dealing with
33 * page-based copying and clearing for user space for the particular
34 * processor(s) we're building for.
35 *
36 * We have the following to choose from:
37 * v4wt - ARMv4 with writethrough cache, without minicache
38 * v4wb - ARMv4 with writeback cache, without minicache
39 * v4_mc - ARMv4 with minicache
40 * xscale - Xscale
41 * xsc3 - XScalev3
42 */
43#undef _USER
44#undef MULTI_USER
45
46#ifdef CONFIG_CPU_COPY_V4WT
47# ifdef _USER
48# define MULTI_USER 1
49# else
50# define _USER v4wt
51# endif
52#endif
53
54#ifdef CONFIG_CPU_COPY_V4WB
55# ifdef _USER
56# define MULTI_USER 1
57# else
58# define _USER v4wb
59# endif
60#endif
61
62#ifdef CONFIG_CPU_COPY_FEROCEON
63# ifdef _USER
64# define MULTI_USER 1
65# else
66# define _USER feroceon
67# endif
68#endif
69
70#ifdef CONFIG_CPU_COPY_FA
71# ifdef _USER
72# define MULTI_USER 1
73# else
74# define _USER fa
75# endif
76#endif
77
78#ifdef CONFIG_CPU_SA1100
79# ifdef _USER
80# define MULTI_USER 1
81# else
82# define _USER v4_mc
83# endif
84#endif
85
86#ifdef CONFIG_CPU_XSCALE
87# ifdef _USER
88# define MULTI_USER 1
89# else
90# define _USER xscale_mc
91# endif
92#endif
93
94#ifdef CONFIG_CPU_XSC3
95# ifdef _USER
96# define MULTI_USER 1
97# else
98# define _USER xsc3_mc
99# endif
100#endif
101
102#ifdef CONFIG_CPU_COPY_V6
103# define MULTI_USER 1
104#endif
105
106#if !defined(_USER) && !defined(MULTI_USER)
107#error Unknown user operations model
108#endif
109
110struct page;
111struct vm_area_struct;
112
113struct cpu_user_fns {
114 void (*cpu_clear_user_highpage)(struct page *page, unsigned long vaddr);
115 void (*cpu_copy_user_highpage)(struct page *to, struct page *from,
116 unsigned long vaddr, struct vm_area_struct *vma);
117};
118
119#ifdef MULTI_USER
120extern struct cpu_user_fns cpu_user;
121
122#define __cpu_clear_user_highpage cpu_user.cpu_clear_user_highpage
123#define __cpu_copy_user_highpage cpu_user.cpu_copy_user_highpage
124
125#else
126
127#define __cpu_clear_user_highpage __glue(_USER,_clear_user_highpage)
128#define __cpu_copy_user_highpage __glue(_USER,_copy_user_highpage)
129
130extern void __cpu_clear_user_highpage(struct page *page, unsigned long vaddr);
131extern void __cpu_copy_user_highpage(struct page *to, struct page *from,
132 unsigned long vaddr, struct vm_area_struct *vma);
133#endif
134
135#define clear_user_highpage(page,vaddr) \
136 __cpu_clear_user_highpage(page, vaddr)
137
138#define __HAVE_ARCH_COPY_USER_HIGHPAGE
139#define copy_user_highpage(to,from,vaddr,vma) \
140 __cpu_copy_user_highpage(to, from, vaddr, vma)
141
142#define clear_page(page) memset((void *)(page), 0, PAGE_SIZE)
143extern void copy_page(void *to, const void *from);
144
145#ifdef CONFIG_KUSER_HELPERS
146#define __HAVE_ARCH_GATE_AREA 1
147#endif
148
149#ifdef CONFIG_ARM_LPAE
150#include <asm/pgtable-3level-types.h>
151#else
152#include <asm/pgtable-2level-types.h>
153#endif
154
155#endif /* CONFIG_MMU */
156
157typedef struct page *pgtable_t;
158
159#ifdef CONFIG_HAVE_ARCH_PFN_VALID
160extern int pfn_valid(unsigned long);
161#endif
162
163#include <asm/memory.h>
164
165#endif /* !__ASSEMBLY__ */
166
167#define VM_DATA_DEFAULT_FLAGS \
168 (((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0) | \
169 VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
170
171#include <asm-generic/getorder.h>
172
173#endif