Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/include/asm-arm/page.h |
| 3 | * |
| 4 | * Copyright (C) 1995-2003 Russell King |
| 5 | * |
| 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. |
| 9 | */ |
| 10 | #ifndef _ASMARM_PAGE_H |
| 11 | #define _ASMARM_PAGE_H |
| 12 | |
| 13 | #include <linux/config.h> |
| 14 | |
| 15 | /* PAGE_SHIFT determines the page size */ |
| 16 | #define PAGE_SHIFT 12 |
| 17 | #define PAGE_SIZE (1UL << PAGE_SHIFT) |
| 18 | #define PAGE_MASK (~(PAGE_SIZE-1)) |
| 19 | |
| 20 | #ifdef __KERNEL__ |
| 21 | |
| 22 | /* to align the pointer to the (next) page boundary */ |
| 23 | #define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK) |
| 24 | |
| 25 | #ifndef __ASSEMBLY__ |
| 26 | |
| 27 | #include <asm/glue.h> |
| 28 | |
| 29 | /* |
| 30 | * User Space Model |
| 31 | * ================ |
| 32 | * |
| 33 | * This section selects the correct set of functions for dealing with |
| 34 | * page-based copying and clearing for user space for the particular |
| 35 | * processor(s) we're building for. |
| 36 | * |
| 37 | * We have the following to choose from: |
| 38 | * v3 - ARMv3 |
| 39 | * v4wt - ARMv4 with writethrough cache, without minicache |
| 40 | * v4wb - ARMv4 with writeback cache, without minicache |
| 41 | * v4_mc - ARMv4 with minicache |
| 42 | * xscale - Xscale |
| 43 | */ |
| 44 | #undef _USER |
| 45 | #undef MULTI_USER |
| 46 | |
| 47 | #ifdef CONFIG_CPU_COPY_V3 |
| 48 | # ifdef _USER |
| 49 | # define MULTI_USER 1 |
| 50 | # else |
| 51 | # define _USER v3 |
| 52 | # endif |
| 53 | #endif |
| 54 | |
| 55 | #ifdef CONFIG_CPU_COPY_V4WT |
| 56 | # ifdef _USER |
| 57 | # define MULTI_USER 1 |
| 58 | # else |
| 59 | # define _USER v4wt |
| 60 | # endif |
| 61 | #endif |
| 62 | |
| 63 | #ifdef CONFIG_CPU_COPY_V4WB |
| 64 | # ifdef _USER |
| 65 | # define MULTI_USER 1 |
| 66 | # else |
| 67 | # define _USER v4wb |
| 68 | # endif |
| 69 | #endif |
| 70 | |
| 71 | #ifdef CONFIG_CPU_SA1100 |
| 72 | # ifdef _USER |
| 73 | # define MULTI_USER 1 |
| 74 | # else |
| 75 | # define _USER v4_mc |
| 76 | # endif |
| 77 | #endif |
| 78 | |
| 79 | #ifdef CONFIG_CPU_XSCALE |
| 80 | # ifdef _USER |
| 81 | # define MULTI_USER 1 |
| 82 | # else |
| 83 | # define _USER xscale_mc |
| 84 | # endif |
| 85 | #endif |
| 86 | |
| 87 | #ifdef CONFIG_CPU_COPY_V6 |
| 88 | # define MULTI_USER 1 |
| 89 | #endif |
| 90 | |
| 91 | #if !defined(_USER) && !defined(MULTI_USER) |
| 92 | #error Unknown user operations model |
| 93 | #endif |
| 94 | |
| 95 | struct cpu_user_fns { |
| 96 | void (*cpu_clear_user_page)(void *p, unsigned long user); |
| 97 | void (*cpu_copy_user_page)(void *to, const void *from, |
| 98 | unsigned long user); |
| 99 | }; |
| 100 | |
| 101 | #ifdef MULTI_USER |
| 102 | extern struct cpu_user_fns cpu_user; |
| 103 | |
| 104 | #define __cpu_clear_user_page cpu_user.cpu_clear_user_page |
| 105 | #define __cpu_copy_user_page cpu_user.cpu_copy_user_page |
| 106 | |
| 107 | #else |
| 108 | |
| 109 | #define __cpu_clear_user_page __glue(_USER,_clear_user_page) |
| 110 | #define __cpu_copy_user_page __glue(_USER,_copy_user_page) |
| 111 | |
| 112 | extern void __cpu_clear_user_page(void *p, unsigned long user); |
| 113 | extern void __cpu_copy_user_page(void *to, const void *from, |
| 114 | unsigned long user); |
| 115 | #endif |
| 116 | |
Russell King | d2bab05 | 2005-05-10 14:23:01 +0100 | [diff] [blame] | 117 | #define clear_user_page(addr,vaddr,pg) __cpu_clear_user_page(addr, vaddr) |
| 118 | #define copy_user_page(to,from,vaddr,pg) __cpu_copy_user_page(to, from, vaddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | |
| 120 | #define clear_page(page) memzero((void *)(page), PAGE_SIZE) |
| 121 | extern void copy_page(void *to, const void *from); |
| 122 | |
| 123 | #undef STRICT_MM_TYPECHECKS |
| 124 | |
| 125 | #ifdef STRICT_MM_TYPECHECKS |
| 126 | /* |
| 127 | * These are used to make use of C type-checking.. |
| 128 | */ |
| 129 | typedef struct { unsigned long pte; } pte_t; |
| 130 | typedef struct { unsigned long pmd; } pmd_t; |
| 131 | typedef struct { unsigned long pgd[2]; } pgd_t; |
| 132 | typedef struct { unsigned long pgprot; } pgprot_t; |
| 133 | |
| 134 | #define pte_val(x) ((x).pte) |
| 135 | #define pmd_val(x) ((x).pmd) |
| 136 | #define pgd_val(x) ((x).pgd[0]) |
| 137 | #define pgprot_val(x) ((x).pgprot) |
| 138 | |
| 139 | #define __pte(x) ((pte_t) { (x) } ) |
| 140 | #define __pmd(x) ((pmd_t) { (x) } ) |
| 141 | #define __pgprot(x) ((pgprot_t) { (x) } ) |
| 142 | |
| 143 | #else |
| 144 | /* |
| 145 | * .. while these make it easier on the compiler |
| 146 | */ |
| 147 | typedef unsigned long pte_t; |
| 148 | typedef unsigned long pmd_t; |
| 149 | typedef unsigned long pgd_t[2]; |
| 150 | typedef unsigned long pgprot_t; |
| 151 | |
| 152 | #define pte_val(x) (x) |
| 153 | #define pmd_val(x) (x) |
| 154 | #define pgd_val(x) ((x)[0]) |
| 155 | #define pgprot_val(x) (x) |
| 156 | |
| 157 | #define __pte(x) (x) |
| 158 | #define __pmd(x) (x) |
| 159 | #define __pgprot(x) (x) |
| 160 | |
| 161 | #endif /* STRICT_MM_TYPECHECKS */ |
| 162 | |
Russell King | c4e1f6f | 2005-05-10 10:40:19 +0100 | [diff] [blame] | 163 | /* the upper-most page table pointer */ |
| 164 | extern pmd_t *top_pmd; |
| 165 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | #include <asm/memory.h> |
| 167 | |
| 168 | #endif /* !__ASSEMBLY__ */ |
| 169 | |
| 170 | #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ |
| 171 | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) |
| 172 | |
| 173 | #endif /* __KERNEL__ */ |
| 174 | |
Stephen Rothwell | fd4fd5a | 2005-09-03 15:54:30 -0700 | [diff] [blame] | 175 | #include <asm-generic/page.h> |
| 176 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | #endif |