tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Based on arch/arm/include/asm/page.h
3 *
4 * Copyright (C) 1995-2003 Russell King
5 * Copyright (C) 2012 ARM Ltd.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
18 */
19#ifndef __ASM_PAGE_H
20#define __ASM_PAGE_H
21
22/* PAGE_SHIFT determines the page size */
23#ifdef CONFIG_ARM64_64K_PAGES
24#define PAGE_SHIFT 16
25#else
26#define PAGE_SHIFT 12
27#endif
28#define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT)
29#define PAGE_MASK (~(PAGE_SIZE-1))
30
31/* We do define AT_SYSINFO_EHDR but don't use the gate mechanism */
32#define __HAVE_ARCH_GATE_AREA 1
33
34#ifndef __ASSEMBLY__
35
36#ifdef CONFIG_ARM64_64K_PAGES
37#include <asm/pgtable-2level-types.h>
38#else
39#include <asm/pgtable-3level-types.h>
40#endif
41
42extern void __cpu_clear_user_page(void *p, unsigned long user);
43extern void __cpu_copy_user_page(void *to, const void *from,
44 unsigned long user);
45extern void copy_page(void *to, const void *from);
46extern void clear_page(void *to);
47
48#define clear_user_page(addr,vaddr,pg) __cpu_clear_user_page(addr, vaddr)
49#define copy_user_page(to,from,vaddr,pg) __cpu_copy_user_page(to, from, vaddr)
50
51typedef struct page *pgtable_t;
52
53#ifdef CONFIG_HAVE_ARCH_PFN_VALID
54extern int pfn_valid(unsigned long);
55#endif
56
57#include <asm/memory.h>
58
59#endif /* !__ASSEMBLY__ */
60
61#define VM_DATA_DEFAULT_FLAGS \
62 (((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0) | \
63 VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
64
65#include <asm-generic/getorder.h>
66
67#endif