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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