LXR linux/arch/nds32/include/asm/page.h

   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
  23struct page;
  24struct vm_area_struct;
  25#ifdef CONFIG_CPU_CACHE_ALIASING
  26extern void copy_user_highpage(struct page *to, struct page *from,
  27                               unsigned long vaddr, struct vm_area_struct *vma);
  28extern void clear_user_highpage(struct page *page, unsigned long vaddr);
  29
  30void copy_user_page(void *vto, void *vfrom, unsigned long vaddr,
  31                    struct page *to);
  32void 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
  40void clear_page(void *page);
  41void copy_page(void *to, void *from);
  42
  43typedef unsigned long pte_t;
  44typedef unsigned long pgd_t;
  45typedef 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
  55typedef 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