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Linux kernel mirror (for testing)
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linux
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
154#ifdef CONFIG_ARM_LPAE
155#include <asm/pgtable-3level-types.h>
156#else
157#include <asm/pgtable-2level-types.h>
158#endif
159
160#endif /* CONFIG_MMU */
161
162typedef struct page *pgtable_t;
163
164#ifdef CONFIG_HAVE_ARCH_PFN_VALID
165extern int pfn_valid(unsigned long);
166#endif
167
168#include <asm/memory.h>
169
170#endif /* !__ASSEMBLY__ */
171
172#define VM_DATA_DEFAULT_FLAGS \
173 (((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0) | \
174 VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
175
176#include <asm-generic/getorder.h>
177
178#endif