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 (_AC(1,UL) << PAGE_SHIFT)
16 #define PAGE_MASK (~((1 << PAGE_SHIFT) - 1))
22 #include <asm/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:
37 * v4wt - ARMv4 with writethrough cache, without minicache
38 * v4wb - ARMv4 with writeback cache, without minicache
39 * v4_mc - ARMv4 with minicache
46 #ifdef CONFIG_CPU_COPY_V4WT
54 #ifdef CONFIG_CPU_COPY_V4WB
62 #ifdef CONFIG_CPU_COPY_FEROCEON
66 # define _USER feroceon
70 #ifdef CONFIG_CPU_COPY_FA
78 #ifdef CONFIG_CPU_SA1100
86 #ifdef CONFIG_CPU_XSCALE
90 # define _USER xscale_mc
94 #ifdef CONFIG_CPU_XSC3
98 # define _USER xsc3_mc
102 #ifdef CONFIG_CPU_COPY_V6
103 # define MULTI_USER 1
106 #if !defined(_USER) && !defined(MULTI_USER)
107 #error Unknown user operations model
111 struct vm_area_struct;
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, struct vm_area_struct *vma);
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, struct vm_area_struct *vma);
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, vma)
142 #define clear_page(page) memset((void *)(page), 0, PAGE_SIZE)
143 extern void copy_page(void *to, const void *from);
145 #ifdef CONFIG_KUSER_HELPERS
146 #define __HAVE_ARCH_GATE_AREA 1
149 #ifdef CONFIG_ARM_LPAE
150 #include <asm/pgtable-3level-types.h>
152 #include <asm/pgtable-2level-types.h>
155 #endif /* CONFIG_MMU */
157 typedef struct page *pgtable_t;
159 #ifdef CONFIG_HAVE_ARCH_PFN_VALID
160 extern int pfn_valid(unsigned long);
163 #include <asm/memory.h>
165 #endif /* !__ASSEMBLY__ */
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)
171 #include <asm-generic/getorder.h>