page.h

  1/* SPDX-License-Identifier: GPL-2.0-only */
  2/*
  3 *  arch/arm/include/asm/page.h
  4 *
  5 *  Copyright (C) 1995-2003 Russell King
  6 */
  7#ifndef _ASMARM_PAGE_H
  8#define _ASMARM_PAGE_H
  9
 10#include <vdso/page.h>
 11
 12#ifndef __ASSEMBLY__
 13
 14#ifndef CONFIG_MMU
 15
 16#include <asm/page-nommu.h>
 17
 18#else
 19
 20#include <asm/glue.h>
 21
 22/*
 23 *	User Space Model
 24 *	================
 25 *
 26 *	This section selects the correct set of functions for dealing with
 27 *	page-based copying and clearing for user space for the particular
 28 *	processor(s) we're building for.
 29 *
 30 *	We have the following to choose from:
 31 *	  v4wt		- ARMv4 with writethrough cache, without minicache
 32 *	  v4wb		- ARMv4 with writeback cache, without minicache
 33 *	  v4_mc		- ARMv4 with minicache
 34 *	  xscale	- Xscale
 35 *	  xsc3		- XScalev3
 36 */
 37#undef _USER
 38#undef MULTI_USER
 39
 40#ifdef CONFIG_CPU_COPY_V4WT
 41# ifdef _USER
 42#  define MULTI_USER 1
 43# else
 44#  define _USER v4wt
 45# endif
 46#endif
 47
 48#ifdef CONFIG_CPU_COPY_V4WB
 49# ifdef _USER
 50#  define MULTI_USER 1
 51# else
 52#  define _USER v4wb
 53# endif
 54#endif
 55
 56#ifdef CONFIG_CPU_COPY_FEROCEON
 57# ifdef _USER
 58#  define MULTI_USER 1
 59# else
 60#  define _USER feroceon
 61# endif
 62#endif
 63
 64#ifdef CONFIG_CPU_COPY_FA
 65# ifdef _USER
 66#  define MULTI_USER 1
 67# else
 68#  define _USER fa
 69# endif
 70#endif
 71
 72#ifdef CONFIG_CPU_SA1100
 73# ifdef _USER
 74#  define MULTI_USER 1
 75# else
 76#  define _USER v4_mc
 77# endif
 78#endif
 79
 80#ifdef CONFIG_CPU_XSCALE
 81# ifdef _USER
 82#  define MULTI_USER 1
 83# else
 84#  define _USER xscale_mc
 85# endif
 86#endif
 87
 88#ifdef CONFIG_CPU_XSC3
 89# ifdef _USER
 90#  define MULTI_USER 1
 91# else
 92#  define _USER xsc3_mc
 93# endif
 94#endif
 95
 96#ifdef CONFIG_CPU_COPY_V6
 97# define MULTI_USER 1
 98#endif
 99
100#if !defined(_USER) && !defined(MULTI_USER)
101#error Unknown user operations model
102#endif
103
104struct page;
105struct vm_area_struct;
106
107struct cpu_user_fns {
108	void (*cpu_clear_user_highpage)(struct page *page, unsigned long vaddr);
109	void (*cpu_copy_user_highpage)(struct page *to, struct page *from,
110			unsigned long vaddr, struct vm_area_struct *vma);
111};
112
113void fa_copy_user_highpage(struct page *to, struct page *from,
114	unsigned long vaddr, struct vm_area_struct *vma);
115void fa_clear_user_highpage(struct page *page, unsigned long vaddr);
116void feroceon_copy_user_highpage(struct page *to, struct page *from,
117	unsigned long vaddr, struct vm_area_struct *vma);
118void feroceon_clear_user_highpage(struct page *page, unsigned long vaddr);
119void v4_mc_copy_user_highpage(struct page *to, struct page *from,
120	unsigned long vaddr, struct vm_area_struct *vma);
121void v4_mc_clear_user_highpage(struct page *page, unsigned long vaddr);
122void v4wb_copy_user_highpage(struct page *to, struct page *from,
123	unsigned long vaddr, struct vm_area_struct *vma);
124void v4wb_clear_user_highpage(struct page *page, unsigned long vaddr);
125void v4wt_copy_user_highpage(struct page *to, struct page *from,
126	unsigned long vaddr, struct vm_area_struct *vma);
127void v4wt_clear_user_highpage(struct page *page, unsigned long vaddr);
128void xsc3_mc_copy_user_highpage(struct page *to, struct page *from,
129	unsigned long vaddr, struct vm_area_struct *vma);
130void xsc3_mc_clear_user_highpage(struct page *page, unsigned long vaddr);
131void xscale_mc_copy_user_highpage(struct page *to, struct page *from,
132	unsigned long vaddr, struct vm_area_struct *vma);
133void xscale_mc_clear_user_highpage(struct page *page, unsigned long vaddr);
134
135#ifdef MULTI_USER
136extern struct cpu_user_fns cpu_user;
137
138#define __cpu_clear_user_highpage	cpu_user.cpu_clear_user_highpage
139#define __cpu_copy_user_highpage	cpu_user.cpu_copy_user_highpage
140
141#else
142
143#define __cpu_clear_user_highpage	__glue(_USER,_clear_user_highpage)
144#define __cpu_copy_user_highpage	__glue(_USER,_copy_user_highpage)
145
146extern void __cpu_clear_user_highpage(struct page *page, unsigned long vaddr);
147extern void __cpu_copy_user_highpage(struct page *to, struct page *from,
148			unsigned long vaddr, struct vm_area_struct *vma);
149#endif
150
151#define clear_user_highpage(page,vaddr)		\
152	 __cpu_clear_user_highpage(page, vaddr)
153
154#define __HAVE_ARCH_COPY_USER_HIGHPAGE
155#define copy_user_highpage(to,from,vaddr,vma)	\
156	__cpu_copy_user_highpage(to, from, vaddr, vma)
157
158#define clear_page(page)	memset((void *)(page), 0, PAGE_SIZE)
159extern void copy_page(void *to, const void *from);
160
161#ifdef CONFIG_KUSER_HELPERS
162#define __HAVE_ARCH_GATE_AREA 1
163#endif
164
165#ifdef CONFIG_ARM_LPAE
166#include <asm/pgtable-3level-types.h>
167#else
168#include <asm/pgtable-2level-types.h>
169#ifdef CONFIG_VMAP_STACK
170#define ARCH_PAGE_TABLE_SYNC_MASK	PGTBL_PMD_MODIFIED
171#endif
172#endif
173
174#endif /* CONFIG_MMU */
175
176typedef struct page *pgtable_t;
177
178#ifdef CONFIG_HAVE_ARCH_PFN_VALID
179extern int pfn_valid(unsigned long);
180#define pfn_valid pfn_valid
181#endif
182
183#endif /* !__ASSEMBLY__ */
184
185#include <asm/memory.h>
186
187#define VM_DATA_DEFAULT_FLAGS	VM_DATA_FLAGS_TSK_EXEC
188
189#include <asm-generic/getorder.h>
190#include <asm-generic/memory_model.h>
191
192#endif