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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
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 (~(PAGE_SIZE-1))
17
18#ifndef __ASSEMBLY__
19
20#ifndef CONFIG_MMU
21
22#include "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 * v3 - ARMv3
38 * v4wt - ARMv4 with writethrough cache, without minicache
39 * v4wb - ARMv4 with writeback cache, without minicache
40 * v4_mc - ARMv4 with minicache
41 * xscale - Xscale
42 * xsc3 - XScalev3
43 */
44#undef _USER
45#undef MULTI_USER
46
47#ifdef CONFIG_CPU_COPY_V3
48# ifdef _USER
49# define MULTI_USER 1
50# else
51# define _USER v3
52# endif
53#endif
54
55#ifdef CONFIG_CPU_COPY_V4WT
56# ifdef _USER
57# define MULTI_USER 1
58# else
59# define _USER v4wt
60# endif
61#endif
62
63#ifdef CONFIG_CPU_COPY_V4WB
64# ifdef _USER
65# define MULTI_USER 1
66# else
67# define _USER v4wb
68# endif
69#endif
70
71#ifdef CONFIG_CPU_COPY_FEROCEON
72# ifdef _USER
73# define MULTI_USER 1
74# else
75# define _USER feroceon
76# endif
77#endif
78
79#ifdef CONFIG_CPU_COPY_FA
80# ifdef _USER
81# define MULTI_USER 1
82# else
83# define _USER fa
84# endif
85#endif
86
87#ifdef CONFIG_CPU_SA1100
88# ifdef _USER
89# define MULTI_USER 1
90# else
91# define _USER v4_mc
92# endif
93#endif
94
95#ifdef CONFIG_CPU_XSCALE
96# ifdef _USER
97# define MULTI_USER 1
98# else
99# define _USER xscale_mc
100# endif
101#endif
102
103#ifdef CONFIG_CPU_XSC3
104# ifdef _USER
105# define MULTI_USER 1
106# else
107# define _USER xsc3_mc
108# endif
109#endif
110
111#ifdef CONFIG_CPU_COPY_V6
112# define MULTI_USER 1
113#endif
114
115#if !defined(_USER) && !defined(MULTI_USER)
116#error Unknown user operations model
117#endif
118
119struct page;
120struct vm_area_struct;
121
122struct cpu_user_fns {
123 void (*cpu_clear_user_highpage)(struct page *page, unsigned long vaddr);
124 void (*cpu_copy_user_highpage)(struct page *to, struct page *from,
125 unsigned long vaddr, struct vm_area_struct *vma);
126};
127
128#ifdef MULTI_USER
129extern struct cpu_user_fns cpu_user;
130
131#define __cpu_clear_user_highpage cpu_user.cpu_clear_user_highpage
132#define __cpu_copy_user_highpage cpu_user.cpu_copy_user_highpage
133
134#else
135
136#define __cpu_clear_user_highpage __glue(_USER,_clear_user_highpage)
137#define __cpu_copy_user_highpage __glue(_USER,_copy_user_highpage)
138
139extern void __cpu_clear_user_highpage(struct page *page, unsigned long vaddr);
140extern void __cpu_copy_user_highpage(struct page *to, struct page *from,
141 unsigned long vaddr, struct vm_area_struct *vma);
142#endif
143
144#define clear_user_highpage(page,vaddr) \
145 __cpu_clear_user_highpage(page, vaddr)
146
147#define __HAVE_ARCH_COPY_USER_HIGHPAGE
148#define copy_user_highpage(to,from,vaddr,vma) \
149 __cpu_copy_user_highpage(to, from, vaddr, vma)
150
151#define clear_page(page) memset((void *)(page), 0, PAGE_SIZE)
152extern void copy_page(void *to, const void *from);
153
154typedef unsigned long pteval_t;
155
156#undef STRICT_MM_TYPECHECKS
157
158#ifdef STRICT_MM_TYPECHECKS
159/*
160 * These are used to make use of C type-checking..
161 */
162typedef struct { pteval_t pte; } pte_t;
163typedef struct { unsigned long pmd; } pmd_t;
164typedef struct { unsigned long pgd[2]; } pgd_t;
165typedef struct { unsigned long pgprot; } pgprot_t;
166
167#define pte_val(x) ((x).pte)
168#define pmd_val(x) ((x).pmd)
169#define pgd_val(x) ((x).pgd[0])
170#define pgprot_val(x) ((x).pgprot)
171
172#define __pte(x) ((pte_t) { (x) } )
173#define __pmd(x) ((pmd_t) { (x) } )
174#define __pgprot(x) ((pgprot_t) { (x) } )
175
176#else
177/*
178 * .. while these make it easier on the compiler
179 */
180typedef pteval_t pte_t;
181typedef unsigned long pmd_t;
182typedef unsigned long pgd_t[2];
183typedef unsigned long pgprot_t;
184
185#define pte_val(x) (x)
186#define pmd_val(x) (x)
187#define pgd_val(x) ((x)[0])
188#define pgprot_val(x) (x)
189
190#define __pte(x) (x)
191#define __pmd(x) (x)
192#define __pgprot(x) (x)
193
194#endif /* STRICT_MM_TYPECHECKS */
195
196#endif /* CONFIG_MMU */
197
198typedef struct page *pgtable_t;
199
200#ifdef CONFIG_HAVE_ARCH_PFN_VALID
201extern int pfn_valid(unsigned long);
202#endif
203
204#include <asm/memory.h>
205
206#endif /* !__ASSEMBLY__ */
207
208#define VM_DATA_DEFAULT_FLAGS \
209 (((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0) | \
210 VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
211
212#include <asm-generic/getorder.h>
213
214#endif