2 * Based on arch/arm/include/asm/page.h
4 * Copyright (C) 1995-2003 Russell King
5 * Copyright (C) 2012 ARM Ltd.
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.
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.
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/>.
22 #include <linux/const.h>
24 /* PAGE_SHIFT determines the page size */
25 /* CONT_SHIFT determines the number of pages which can be tracked together */
26 #define PAGE_SHIFT CONFIG_ARM64_PAGE_SHIFT
27 #define CONT_SHIFT CONFIG_ARM64_CONT_SHIFT
28 #define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT)
29 #define PAGE_MASK (~(PAGE_SIZE-1))
31 #define CONT_SIZE (_AC(1, UL) << (CONT_SHIFT + PAGE_SHIFT))
32 #define CONT_MASK (~(CONT_SIZE-1))
36 #include <asm/pgtable-types.h>
38 extern void __cpu_clear_user_page(void *p, unsigned long user);
39 extern void __cpu_copy_user_page(void *to, const void *from,
41 extern void copy_page(void *to, const void *from);
42 extern void clear_page(void *to);
44 #define clear_user_page(addr,vaddr,pg) __cpu_clear_user_page(addr, vaddr)
45 #define copy_user_page(to,from,vaddr,pg) __cpu_copy_user_page(to, from, vaddr)
47 typedef struct page *pgtable_t;
49 #ifdef CONFIG_HAVE_ARCH_PFN_VALID
50 extern int pfn_valid(unsigned long);
53 #include <asm/memory.h>
55 #endif /* !__ASSEMBLY__ */
57 #define VM_DATA_DEFAULT_FLAGS \
58 (((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0) | \
59 VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
61 #include <asm-generic/getorder.h>