ia64/linux-2.6.18-xen.hg

view include/asm-arm/page.h @ 782:9ab1c319531f

merge with linux-2.6.18-xen.hg
author Isaku Yamahata <yamahata@valinux.co.jp>
date Wed Jan 28 13:07:23 2009 +0900 (2009-01-28)
parents 3e8752eb6d9c
children
line source
1 /*
2 * linux/include/asm-arm/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
14 #ifdef __KERNEL__
16 /* PAGE_SHIFT determines the page size */
17 #define PAGE_SHIFT 12
18 #define PAGE_SIZE (1UL << PAGE_SHIFT)
19 #define PAGE_MASK (~(PAGE_SIZE-1))
21 /* to align the pointer to the (next) page boundary */
22 #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
24 #ifndef __ASSEMBLY__
26 #ifndef CONFIG_MMU
28 #include "page-nommu.h"
30 #else
32 #include <asm/glue.h>
34 /*
35 * User Space Model
36 * ================
37 *
38 * This section selects the correct set of functions for dealing with
39 * page-based copying and clearing for user space for the particular
40 * processor(s) we're building for.
41 *
42 * We have the following to choose from:
43 * v3 - ARMv3
44 * v4wt - ARMv4 with writethrough cache, without minicache
45 * v4wb - ARMv4 with writeback cache, without minicache
46 * v4_mc - ARMv4 with minicache
47 * xscale - Xscale
48 * xsc3 - XScalev3
49 */
50 #undef _USER
51 #undef MULTI_USER
53 #ifdef CONFIG_CPU_COPY_V3
54 # ifdef _USER
55 # define MULTI_USER 1
56 # else
57 # define _USER v3
58 # endif
59 #endif
61 #ifdef CONFIG_CPU_COPY_V4WT
62 # ifdef _USER
63 # define MULTI_USER 1
64 # else
65 # define _USER v4wt
66 # endif
67 #endif
69 #ifdef CONFIG_CPU_COPY_V4WB
70 # ifdef _USER
71 # define MULTI_USER 1
72 # else
73 # define _USER v4wb
74 # endif
75 #endif
77 #ifdef CONFIG_CPU_SA1100
78 # ifdef _USER
79 # define MULTI_USER 1
80 # else
81 # define _USER v4_mc
82 # endif
83 #endif
85 #ifdef CONFIG_CPU_XSCALE
86 # ifdef _USER
87 # define MULTI_USER 1
88 # else
89 # define _USER xscale_mc
90 # endif
91 #endif
93 #ifdef CONFIG_CPU_XSC3
94 # ifdef _USER
95 # define MULTI_USER 1
96 # else
97 # define _USER xsc3_mc
98 # endif
99 #endif
101 #ifdef CONFIG_CPU_COPY_V6
102 # define MULTI_USER 1
103 #endif
105 #if !defined(_USER) && !defined(MULTI_USER)
106 #error Unknown user operations model
107 #endif
109 struct cpu_user_fns {
110 void (*cpu_clear_user_page)(void *p, unsigned long user);
111 void (*cpu_copy_user_page)(void *to, const void *from,
112 unsigned long user);
113 };
115 #ifdef MULTI_USER
116 extern struct cpu_user_fns cpu_user;
118 #define __cpu_clear_user_page cpu_user.cpu_clear_user_page
119 #define __cpu_copy_user_page cpu_user.cpu_copy_user_page
121 #else
123 #define __cpu_clear_user_page __glue(_USER,_clear_user_page)
124 #define __cpu_copy_user_page __glue(_USER,_copy_user_page)
126 extern void __cpu_clear_user_page(void *p, unsigned long user);
127 extern void __cpu_copy_user_page(void *to, const void *from,
128 unsigned long user);
129 #endif
131 #define clear_user_page(addr,vaddr,pg) __cpu_clear_user_page(addr, vaddr)
132 #define copy_user_page(to,from,vaddr,pg) __cpu_copy_user_page(to, from, vaddr)
134 #define clear_page(page) memzero((void *)(page), PAGE_SIZE)
135 extern void copy_page(void *to, const void *from);
137 #undef STRICT_MM_TYPECHECKS
139 #ifdef STRICT_MM_TYPECHECKS
140 /*
141 * These are used to make use of C type-checking..
142 */
143 typedef struct { unsigned long pte; } pte_t;
144 typedef struct { unsigned long pmd; } pmd_t;
145 typedef struct { unsigned long pgd[2]; } pgd_t;
146 typedef struct { unsigned long pgprot; } pgprot_t;
148 #define pte_val(x) ((x).pte)
149 #define pmd_val(x) ((x).pmd)
150 #define pgd_val(x) ((x).pgd[0])
151 #define pgprot_val(x) ((x).pgprot)
153 #define __pte(x) ((pte_t) { (x) } )
154 #define __pmd(x) ((pmd_t) { (x) } )
155 #define __pgprot(x) ((pgprot_t) { (x) } )
157 #else
158 /*
159 * .. while these make it easier on the compiler
160 */
161 typedef unsigned long pte_t;
162 typedef unsigned long pmd_t;
163 typedef unsigned long pgd_t[2];
164 typedef unsigned long pgprot_t;
166 #define pte_val(x) (x)
167 #define pmd_val(x) (x)
168 #define pgd_val(x) ((x)[0])
169 #define pgprot_val(x) (x)
171 #define __pte(x) (x)
172 #define __pmd(x) (x)
173 #define __pgprot(x) (x)
175 #endif /* STRICT_MM_TYPECHECKS */
177 /* the upper-most page table pointer */
178 extern pmd_t *top_pmd;
180 #endif /* CONFIG_MMU */
182 #include <asm/memory.h>
184 #endif /* !__ASSEMBLY__ */
186 #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
187 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
189 /*
190 * With EABI on ARMv5 and above we must have 64-bit aligned slab pointers.
191 */
192 #if defined(CONFIG_AEABI) && (__LINUX_ARM_ARCH__ >= 5)
193 #define ARCH_SLAB_MINALIGN 8
194 #endif
196 #include <asm-generic/page.h>
198 #endif /* __KERNEL__ */
200 #endif