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/* * Based on arch/arm/include/asm/page.h * * Copyright (C) 1995-2003 Russell King * Copyright (C) 2012 ARM Ltd. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ #ifndef __ASM_PAGE_H #define __ASM_PAGE_H #include <linux/const.h> /* PAGE_SHIFT determines the page size */ /* CONT_SHIFT determines the number of pages which can be tracked together */ #ifdef CONFIG_ARM64_64K_PAGES #define PAGE_SHIFT 16 #define CONT_SHIFT 5 #elif defined(CONFIG_ARM64_16K_PAGES) #define PAGE_SHIFT 14 #define CONT_SHIFT 7 #else #define PAGE_SHIFT 12 #define CONT_SHIFT 4 #endif #define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT) #define PAGE_MASK (~(PAGE_SIZE-1)) #define CONT_SIZE (_AC(1, UL) << (CONT_SHIFT + PAGE_SHIFT)) #define CONT_MASK (~(CONT_SIZE-1)) #ifndef __ASSEMBLY__ #include <asm/pgtable-types.h> extern void __cpu_clear_user_page(void *p, unsigned long user); extern void __cpu_copy_user_page(void *to, const void *from, unsigned long user); extern void copy_page(void *to, const void *from); extern void clear_page(void *to); #define clear_user_page(addr,vaddr,pg) __cpu_clear_user_page(addr, vaddr) #define copy_user_page(to,from,vaddr,pg) __cpu_copy_user_page(to, from, vaddr) typedef struct page *pgtable_t; #ifdef CONFIG_HAVE_ARCH_PFN_VALID extern int pfn_valid(unsigned long); #endif #include <asm/memory.h> #endif /* !__ASSEMBLY__ */ #define VM_DATA_DEFAULT_FLAGS \ (((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0) | \ VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) #include <asm-generic/getorder.h> #endif