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
16 /* PAGE_SHIFT determines the page size */
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)
28 #include "page-nommu.h"
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.
42 * We have the following to choose from:
44 * v4wt - ARMv4 with writethrough cache, without minicache
45 * v4wb - ARMv4 with writeback cache, without minicache
46 * v4_mc - ARMv4 with minicache
53 #ifdef CONFIG_CPU_COPY_V3
61 #ifdef CONFIG_CPU_COPY_V4WT
69 #ifdef CONFIG_CPU_COPY_V4WB
77 #ifdef CONFIG_CPU_SA1100
85 #ifdef CONFIG_CPU_XSCALE
89 # define _USER xscale_mc
93 #ifdef CONFIG_CPU_XSC3
97 # define _USER xsc3_mc
101 #ifdef CONFIG_CPU_COPY_V6
102 # define MULTI_USER 1
105 #if !defined(_USER) && !defined(MULTI_USER)
106 #error Unknown user operations model
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
,
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
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
,
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
141 * These are used to make use of C type-checking..
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) } )
159 * .. while these make it easier on the compiler
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)
173 #define __pgprot(x) (x)
175 #endif /* STRICT_MM_TYPECHECKS */
177 #endif /* CONFIG_MMU */
179 #include <asm/memory.h>
181 #endif /* !__ASSEMBLY__ */
183 #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
184 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
187 * With EABI on ARMv5 and above we must have 64-bit aligned slab pointers.
189 #if defined(CONFIG_AEABI) && (__LINUX_ARM_ARCH__ >= 5)
190 #define ARCH_SLAB_MINALIGN 8
193 #include <asm-generic/page.h>
195 #endif /* __KERNEL__ */