2 * linux/include/asm-arm/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))
18 /* to align the pointer to the (next) page boundary */
19 #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
25 #include "page-nommu.h"
35 * This section selects the correct set of functions for dealing with
36 * page-based copying and clearing for user space for the particular
37 * processor(s) we're building for.
39 * We have the following to choose from:
41 * v4wt - ARMv4 with writethrough cache, without minicache
42 * v4wb - ARMv4 with writeback cache, without minicache
43 * v4_mc - ARMv4 with minicache
50 #ifdef CONFIG_CPU_COPY_V3
58 #ifdef CONFIG_CPU_COPY_V4WT
66 #ifdef CONFIG_CPU_COPY_V4WB
74 #ifdef CONFIG_CPU_SA1100
82 #ifdef CONFIG_CPU_XSCALE
86 # define _USER xscale_mc
90 #ifdef CONFIG_CPU_XSC3
94 # define _USER xsc3_mc
98 #ifdef CONFIG_CPU_COPY_V6
102 #if !defined(_USER) && !defined(MULTI_USER)
103 #error Unknown user operations model
106 struct cpu_user_fns {
107 void (*cpu_clear_user_page)(void *p, unsigned long user);
108 void (*cpu_copy_user_page)(void *to, const void *from,
113 extern struct cpu_user_fns cpu_user;
115 #define __cpu_clear_user_page cpu_user.cpu_clear_user_page
116 #define __cpu_copy_user_page cpu_user.cpu_copy_user_page
120 #define __cpu_clear_user_page __glue(_USER,_clear_user_page)
121 #define __cpu_copy_user_page __glue(_USER,_copy_user_page)
123 extern void __cpu_clear_user_page(void *p, unsigned long user);
124 extern void __cpu_copy_user_page(void *to, const void *from,
128 #define clear_user_page(addr,vaddr,pg) __cpu_clear_user_page(addr, vaddr)
129 #define copy_user_page(to,from,vaddr,pg) __cpu_copy_user_page(to, from, vaddr)
131 #define clear_page(page) memzero((void *)(page), PAGE_SIZE)
132 extern void copy_page(void *to, const void *from);
134 #undef STRICT_MM_TYPECHECKS
136 #ifdef STRICT_MM_TYPECHECKS
138 * These are used to make use of C type-checking..
140 typedef struct { unsigned long pte; } pte_t;
141 typedef struct { unsigned long pmd; } pmd_t;
142 typedef struct { unsigned long pgd[2]; } pgd_t;
143 typedef struct { unsigned long pgprot; } pgprot_t;
145 #define pte_val(x) ((x).pte)
146 #define pmd_val(x) ((x).pmd)
147 #define pgd_val(x) ((x).pgd[0])
148 #define pgprot_val(x) ((x).pgprot)
150 #define __pte(x) ((pte_t) { (x) } )
151 #define __pmd(x) ((pmd_t) { (x) } )
152 #define __pgprot(x) ((pgprot_t) { (x) } )
156 * .. while these make it easier on the compiler
158 typedef unsigned long pte_t;
159 typedef unsigned long pmd_t;
160 typedef unsigned long pgd_t[2];
161 typedef unsigned long pgprot_t;
163 #define pte_val(x) (x)
164 #define pmd_val(x) (x)
165 #define pgd_val(x) ((x)[0])
166 #define pgprot_val(x) (x)
170 #define __pgprot(x) (x)
172 #endif /* STRICT_MM_TYPECHECKS */
174 typedef struct page *pgtable_t;
176 #endif /* CONFIG_MMU */
178 #include <asm/memory.h>
180 #endif /* !__ASSEMBLY__ */
182 #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
183 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
186 * With EABI on ARMv5 and above we must have 64-bit aligned slab pointers.
188 #if defined(CONFIG_AEABI) && (__LINUX_ARM_ARCH__ >= 5)
189 #define ARCH_SLAB_MINALIGN 8
192 #include <asm-generic/page.h>