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 110struct page; 111struct vm_area_struct; 112 113struct 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 120extern 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 130extern void __cpu_clear_user_highpage(struct page *page, unsigned long vaddr); 131extern 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) 143extern 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 157typedef struct page *pgtable_t; 158 159#ifdef CONFIG_HAVE_ARCH_PFN_VALID 160extern 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