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