2 * arch/arm/include/asm/page.h
4 * Copyright (C) 1995-2003 Russell King
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.
10 #ifndef _ASMARM_PAGE_H
11 #define _ASMARM_PAGE_H
13 /* PAGE_SHIFT determines the page size */
15 #define PAGE_SIZE (1UL << PAGE_SHIFT)
16 #define PAGE_MASK (~(PAGE_SIZE-1))
22 #include "page-nommu.h"
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.
36 * We have the following to choose from:
38 * v4wt - ARMv4 with writethrough cache, without minicache
39 * v4wb - ARMv4 with writeback cache, without minicache
40 * v4_mc - ARMv4 with minicache
47 #ifdef CONFIG_CPU_COPY_V3
55 #ifdef CONFIG_CPU_COPY_V4WT
63 #ifdef CONFIG_CPU_COPY_V4WB
71 #ifdef CONFIG_CPU_COPY_FEROCEON
75 # define _USER feroceon
79 #ifdef CONFIG_CPU_SA1100
87 #ifdef CONFIG_CPU_XSCALE
91 # define _USER xscale_mc
95 #ifdef CONFIG_CPU_XSC3
99 # define _USER xsc3_mc
103 #ifdef CONFIG_CPU_COPY_V6
104 # define MULTI_USER 1
107 #if !defined(_USER) && !defined(MULTI_USER)
108 #error Unknown user operations model
113 struct 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);
120 extern struct cpu_user_fns cpu_user;
122 #define __cpu_clear_user_highpage cpu_user.cpu_clear_user_highpage
123 #define __cpu_copy_user_highpage cpu_user.cpu_copy_user_highpage
127 #define __cpu_clear_user_highpage __glue(_USER,_clear_user_highpage)
128 #define __cpu_copy_user_highpage __glue(_USER,_copy_user_highpage)
130 extern void __cpu_clear_user_highpage(struct page *page, unsigned long vaddr);
131 extern void __cpu_copy_user_highpage(struct page *to, struct page *from,
132 unsigned long vaddr);
135 #define clear_user_highpage(page,vaddr) \
136 __cpu_clear_user_highpage(page, vaddr)
138 #define __HAVE_ARCH_COPY_USER_HIGHPAGE
139 #define copy_user_highpage(to,from,vaddr,vma) \
140 __cpu_copy_user_highpage(to, from, vaddr)
142 #define clear_page(page) memset((void *)(page), 0, PAGE_SIZE)
143 extern void copy_page(void *to, const void *from);
145 #undef STRICT_MM_TYPECHECKS
147 #ifdef STRICT_MM_TYPECHECKS
149 * These are used to make use of C type-checking..
151 typedef struct { unsigned long pte; } pte_t;
152 typedef struct { unsigned long pmd; } pmd_t;
153 typedef struct { unsigned long pgd[2]; } pgd_t;
154 typedef struct { unsigned long pgprot; } pgprot_t;
156 #define pte_val(x) ((x).pte)
157 #define pmd_val(x) ((x).pmd)
158 #define pgd_val(x) ((x).pgd[0])
159 #define pgprot_val(x) ((x).pgprot)
161 #define __pte(x) ((pte_t) { (x) } )
162 #define __pmd(x) ((pmd_t) { (x) } )
163 #define __pgprot(x) ((pgprot_t) { (x) } )
167 * .. while these make it easier on the compiler
169 typedef unsigned long pte_t;
170 typedef unsigned long pmd_t;
171 typedef unsigned long pgd_t[2];
172 typedef unsigned long pgprot_t;
174 #define pte_val(x) (x)
175 #define pmd_val(x) (x)
176 #define pgd_val(x) ((x)[0])
177 #define pgprot_val(x) (x)
181 #define __pgprot(x) (x)
183 #endif /* STRICT_MM_TYPECHECKS */
185 #endif /* CONFIG_MMU */
187 typedef struct page *pgtable_t;
189 #include <asm/memory.h>
191 #endif /* !__ASSEMBLY__ */
193 #define VM_DATA_DEFAULT_FLAGS \
194 (((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0) | \
195 VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
198 * With EABI on ARMv5 and above we must have 64-bit aligned slab pointers.
200 #if defined(CONFIG_AEABI) && (__LINUX_ARM_ARCH__ >= 5)
201 #define ARCH_SLAB_MINALIGN 8
204 #include <asm-generic/page.h>