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Linux/arch/nds32/include/asm/page.h

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  1 /* SPDX-License-Identifier: GPL-2.0 */
  2 /*
  3  * Copyright (C) 2005-2017 Andes Technology Corporation
  4  */
  5 
  6 #ifndef _ASMNDS32_PAGE_H
  7 #define _ASMNDS32_PAGE_H
  8 
  9 #ifdef CONFIG_ANDES_PAGE_SIZE_4KB
 10 #define PAGE_SHIFT      12
 11 #endif
 12 #ifdef CONFIG_ANDES_PAGE_SIZE_8KB
 13 #define PAGE_SHIFT      13
 14 #endif
 15 #include <linux/const.h>
 16 #define PAGE_SIZE       (_AC(1,UL) << PAGE_SHIFT)
 17 #define PAGE_MASK       (~(PAGE_SIZE-1))
 18 
 19 #ifdef __KERNEL__
 20 
 21 #ifndef __ASSEMBLY__
 22 
 23 struct page;
 24 struct vm_area_struct;
 25 #ifdef CONFIG_CPU_CACHE_ALIASING
 26 extern void copy_user_highpage(struct page *to, struct page *from,
 27                                unsigned long vaddr, struct vm_area_struct *vma);
 28 extern void clear_user_highpage(struct page *page, unsigned long vaddr);
 29 
 30 void copy_user_page(void *vto, void *vfrom, unsigned long vaddr,
 31                     struct page *to);
 32 void clear_user_page(void *addr, unsigned long vaddr, struct page *page);
 33 #define __HAVE_ARCH_COPY_USER_HIGHPAGE
 34 #define clear_user_highpage     clear_user_highpage
 35 #else
 36 #define clear_user_page(page, vaddr, pg)        clear_page(page)
 37 #define copy_user_page(to, from, vaddr, pg)     copy_page(to, from)
 38 #endif
 39 
 40 void clear_page(void *page);
 41 void copy_page(void *to, void *from);
 42 
 43 typedef unsigned long pte_t;
 44 typedef unsigned long pgd_t;
 45 typedef unsigned long pgprot_t;
 46 
 47 #define pte_val(x)      (x)
 48 #define pgd_val(x)      (x)
 49 #define pgprot_val(x)   (x)
 50 
 51 #define __pte(x)        (x)
 52 #define __pgd(x)        (x)
 53 #define __pgprot(x)     (x)
 54 
 55 typedef struct page *pgtable_t;
 56 
 57 #include <asm/memory.h>
 58 #include <asm-generic/getorder.h>
 59 
 60 #endif /* !__ASSEMBLY__ */
 61 
 62 #endif /* __KERNEL__ */
 63 
 64 #endif
 65 

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