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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#include <vdso/page.h>
11
12#ifndef __ASSEMBLY__
13
14#ifndef CONFIG_MMU
15
16#include <asm/page-nommu.h>
17
18#else
19
20#include <asm/glue.h>
21
22/*
23 * User Space Model
24 * ================
25 *
26 * This section selects the correct set of functions for dealing with
27 * page-based copying and clearing for user space for the particular
28 * processor(s) we're building for.
29 *
30 * We have the following to choose from:
31 * v4wt - ARMv4 with writethrough cache, without minicache
32 * v4wb - ARMv4 with writeback cache, without minicache
33 * v4_mc - ARMv4 with minicache
34 * xscale - Xscale
35 * xsc3 - XScalev3
36 */
37#undef _USER
38#undef MULTI_USER
39
40#ifdef CONFIG_CPU_COPY_V4WT
41# ifdef _USER
42# define MULTI_USER 1
43# else
44# define _USER v4wt
45# endif
46#endif
47
48#ifdef CONFIG_CPU_COPY_V4WB
49# ifdef _USER
50# define MULTI_USER 1
51# else
52# define _USER v4wb
53# endif
54#endif
55
56#ifdef CONFIG_CPU_COPY_FEROCEON
57# ifdef _USER
58# define MULTI_USER 1
59# else
60# define _USER feroceon
61# endif
62#endif
63
64#ifdef CONFIG_CPU_COPY_FA
65# ifdef _USER
66# define MULTI_USER 1
67# else
68# define _USER fa
69# endif
70#endif
71
72#ifdef CONFIG_CPU_SA1100
73# ifdef _USER
74# define MULTI_USER 1
75# else
76# define _USER v4_mc
77# endif
78#endif
79
80#ifdef CONFIG_CPU_XSCALE
81# ifdef _USER
82# define MULTI_USER 1
83# else
84# define _USER xscale_mc
85# endif
86#endif
87
88#ifdef CONFIG_CPU_XSC3
89# ifdef _USER
90# define MULTI_USER 1
91# else
92# define _USER xsc3_mc
93# endif
94#endif
95
96#ifdef CONFIG_CPU_COPY_V6
97# define MULTI_USER 1
98#endif
99
100#if !defined(_USER) && !defined(MULTI_USER)
101#error Unknown user operations model
102#endif
103
104struct page;
105struct vm_area_struct;
106
107struct cpu_user_fns {
108 void (*cpu_clear_user_highpage)(struct page *page, unsigned long vaddr);
109 void (*cpu_copy_user_highpage)(struct page *to, struct page *from,
110 unsigned long vaddr, struct vm_area_struct *vma);
111};
112
113void fa_copy_user_highpage(struct page *to, struct page *from,
114 unsigned long vaddr, struct vm_area_struct *vma);
115void fa_clear_user_highpage(struct page *page, unsigned long vaddr);
116void feroceon_copy_user_highpage(struct page *to, struct page *from,
117 unsigned long vaddr, struct vm_area_struct *vma);
118void feroceon_clear_user_highpage(struct page *page, unsigned long vaddr);
119void v4_mc_copy_user_highpage(struct page *to, struct page *from,
120 unsigned long vaddr, struct vm_area_struct *vma);
121void v4_mc_clear_user_highpage(struct page *page, unsigned long vaddr);
122void v4wb_copy_user_highpage(struct page *to, struct page *from,
123 unsigned long vaddr, struct vm_area_struct *vma);
124void v4wb_clear_user_highpage(struct page *page, unsigned long vaddr);
125void v4wt_copy_user_highpage(struct page *to, struct page *from,
126 unsigned long vaddr, struct vm_area_struct *vma);
127void v4wt_clear_user_highpage(struct page *page, unsigned long vaddr);
128void xsc3_mc_copy_user_highpage(struct page *to, struct page *from,
129 unsigned long vaddr, struct vm_area_struct *vma);
130void xsc3_mc_clear_user_highpage(struct page *page, unsigned long vaddr);
131void xscale_mc_copy_user_highpage(struct page *to, struct page *from,
132 unsigned long vaddr, struct vm_area_struct *vma);
133void xscale_mc_clear_user_highpage(struct page *page, unsigned long vaddr);
134
135#ifdef MULTI_USER
136extern struct cpu_user_fns cpu_user;
137
138#define __cpu_clear_user_highpage cpu_user.cpu_clear_user_highpage
139#define __cpu_copy_user_highpage cpu_user.cpu_copy_user_highpage
140
141#else
142
143#define __cpu_clear_user_highpage __glue(_USER,_clear_user_highpage)
144#define __cpu_copy_user_highpage __glue(_USER,_copy_user_highpage)
145
146extern void __cpu_clear_user_highpage(struct page *page, unsigned long vaddr);
147extern void __cpu_copy_user_highpage(struct page *to, struct page *from,
148 unsigned long vaddr, struct vm_area_struct *vma);
149#endif
150
151#define clear_user_highpage(page,vaddr) \
152 __cpu_clear_user_highpage(page, vaddr)
153
154#define __HAVE_ARCH_COPY_USER_HIGHPAGE
155#define copy_user_highpage(to,from,vaddr,vma) \
156 __cpu_copy_user_highpage(to, from, vaddr, vma)
157
158#define clear_page(page) memset((void *)(page), 0, PAGE_SIZE)
159extern void copy_page(void *to, const void *from);
160
161#ifdef CONFIG_KUSER_HELPERS
162#define __HAVE_ARCH_GATE_AREA 1
163#endif
164
165#ifdef CONFIG_ARM_LPAE
166#include <asm/pgtable-3level-types.h>
167#else
168#include <asm/pgtable-2level-types.h>
169#ifdef CONFIG_VMAP_STACK
170#define ARCH_PAGE_TABLE_SYNC_MASK PGTBL_PMD_MODIFIED
171#endif
172#endif
173
174#endif /* CONFIG_MMU */
175
176typedef struct page *pgtable_t;
177
178#ifdef CONFIG_HAVE_ARCH_PFN_VALID
179extern int pfn_valid(unsigned long);
180#define pfn_valid pfn_valid
181#endif
182
183#endif /* !__ASSEMBLY__ */
184
185#include <asm/memory.h>
186
187#define VM_DATA_DEFAULT_FLAGS VM_DATA_FLAGS_TSK_EXEC
188
189#include <asm-generic/getorder.h>
190#include <asm-generic/memory_model.h>
191
192#endif
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 12
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