1 /* 2 * arch/arm/include/asm/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 /* PAGE_SHIFT determines the page size */ 14 #define PAGE_SHIFT 12 15 #define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT) 16 #define PAGE_MASK (~((1 << PAGE_SHIFT) - 1)) 17 18 #ifndef __ASSEMBLY__ 19 20 #ifndef CONFIG_MMU 21 22 #include <asm/page-nommu.h> 23 24 #else 25 26 #include <asm/glue.h> 27 28 /* 29 * User Space Model 30 * ================ 31 * 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. 35 * 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 40 * xscale - Xscale 41 * xsc3 - XScalev3 42 */ 43 #undef _USER 44 #undef MULTI_USER 45 46 #ifdef CONFIG_CPU_COPY_V4WT 47 # ifdef _USER 48 # define MULTI_USER 1 49 # else 50 # define _USER v4wt 51 # endif 52 #endif 53 54 #ifdef CONFIG_CPU_COPY_V4WB 55 # ifdef _USER 56 # define MULTI_USER 1 57 # else 58 # define _USER v4wb 59 # endif 60 #endif 61 62 #ifdef CONFIG_CPU_COPY_FEROCEON 63 # ifdef _USER 64 # define MULTI_USER 1 65 # else 66 # define _USER feroceon 67 # endif 68 #endif 69 70 #ifdef CONFIG_CPU_COPY_FA 71 # ifdef _USER 72 # define MULTI_USER 1 73 # else 74 # define _USER fa 75 # endif 76 #endif 77 78 #ifdef CONFIG_CPU_SA1100 79 # ifdef _USER 80 # define MULTI_USER 1 81 # else 82 # define _USER v4_mc 83 # endif 84 #endif 85 86 #ifdef CONFIG_CPU_XSCALE 87 # ifdef _USER 88 # define MULTI_USER 1 89 # else 90 # define _USER xscale_mc 91 # endif 92 #endif 93 94 #ifdef CONFIG_CPU_XSC3 95 # ifdef _USER 96 # define MULTI_USER 1 97 # else 98 # define _USER xsc3_mc 99 # endif 100 #endif 101 102 #ifdef CONFIG_CPU_COPY_V6 103 # define MULTI_USER 1 104 #endif 105 106 #if !defined(_USER) && !defined(MULTI_USER) 107 #error Unknown user operations model 108 #endif 109 110 struct page; 111 struct vm_area_struct; 112 113 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); 117 }; 118 119 #ifdef MULTI_USER 120 extern struct cpu_user_fns cpu_user; 121 122 #define __cpu_clear_user_highpage cpu_user.cpu_clear_user_highpage 123 #define __cpu_copy_user_highpage cpu_user.cpu_copy_user_highpage 124 125 #else 126 127 #define __cpu_clear_user_highpage __glue(_USER,_clear_user_highpage) 128 #define __cpu_copy_user_highpage __glue(_USER,_copy_user_highpage) 129 130 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); 133 #endif 134 135 #define clear_user_highpage(page,vaddr) \ 136 __cpu_clear_user_highpage(page, vaddr) 137 138 #define __HAVE_ARCH_COPY_USER_HIGHPAGE 139 #define copy_user_highpage(to,from,vaddr,vma) \ 140 __cpu_copy_user_highpage(to, from, vaddr, vma) 141 142 #define clear_page(page) memset((void *)(page), 0, PAGE_SIZE) 143 extern void copy_page(void *to, const void *from); 144 145 #ifdef CONFIG_KUSER_HELPERS 146 #define __HAVE_ARCH_GATE_AREA 1 147 #endif 148 149 #ifdef CONFIG_ARM_LPAE 150 #include <asm/pgtable-3level-types.h> 151 #else 152 #include <asm/pgtable-2level-types.h> 153 #endif 154 155 #endif /* CONFIG_MMU */ 156 157 typedef struct page *pgtable_t; 158 159 #ifdef CONFIG_HAVE_ARCH_PFN_VALID 160 extern int pfn_valid(unsigned long); 161 #endif 162 163 #include <asm/memory.h> 164 165 #endif /* !__ASSEMBLY__ */ 166 167 #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) 170 171 #include <asm-generic/getorder.h> 172 173 #endif 174
