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_page
)(void *p
, unsigned long user
);
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_page cpu_user.cpu_clear_user_page
123 #define __cpu_copy_user_highpage cpu_user.cpu_copy_user_highpage
127 #define __cpu_clear_user_page __glue(_USER,_clear_user_page)
128 #define __cpu_copy_user_highpage __glue(_USER,_copy_user_highpage)
130 extern void __cpu_clear_user_page(void *p
, unsigned long user
);
131 extern void __cpu_copy_user_highpage(struct page
*to
, struct page
*from
,
132 unsigned long vaddr
);
135 #define clear_user_page(addr,vaddr,pg) __cpu_clear_user_page(addr, vaddr)
137 #define __HAVE_ARCH_COPY_USER_HIGHPAGE
138 #define copy_user_highpage(to,from,vaddr,vma) \
139 __cpu_copy_user_highpage(to, from, vaddr)
141 #define clear_page(page) memzero((void *)(page), PAGE_SIZE)
142 extern void copy_page(void *to
, const void *from
);
144 #undef STRICT_MM_TYPECHECKS
146 #ifdef STRICT_MM_TYPECHECKS
148 * These are used to make use of C type-checking..
150 typedef struct { unsigned long pte
; } pte_t
;
151 typedef struct { unsigned long pmd
; } pmd_t
;
152 typedef struct { unsigned long pgd
[2]; } pgd_t
;
153 typedef struct { unsigned long pgprot
; } pgprot_t
;
155 #define pte_val(x) ((x).pte)
156 #define pmd_val(x) ((x).pmd)
157 #define pgd_val(x) ((x).pgd[0])
158 #define pgprot_val(x) ((x).pgprot)
160 #define __pte(x) ((pte_t) { (x) } )
161 #define __pmd(x) ((pmd_t) { (x) } )
162 #define __pgprot(x) ((pgprot_t) { (x) } )
166 * .. while these make it easier on the compiler
168 typedef unsigned long pte_t
;
169 typedef unsigned long pmd_t
;
170 typedef unsigned long pgd_t
[2];
171 typedef unsigned long pgprot_t
;
173 #define pte_val(x) (x)
174 #define pmd_val(x) (x)
175 #define pgd_val(x) ((x)[0])
176 #define pgprot_val(x) (x)
180 #define __pgprot(x) (x)
182 #endif /* STRICT_MM_TYPECHECKS */
184 #endif /* CONFIG_MMU */
186 typedef struct page
*pgtable_t
;
188 #include <asm/memory.h>
190 #endif /* !__ASSEMBLY__ */
192 #define VM_DATA_DEFAULT_FLAGS \
193 (((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0) | \
194 VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
197 * With EABI on ARMv5 and above we must have 64-bit aligned slab pointers.
199 #if defined(CONFIG_AEABI) && (__LINUX_ARM_ARCH__ >= 5)
200 #define ARCH_SLAB_MINALIGN 8
203 #include <asm-generic/page.h>
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