arch/nds32/include/asm/page.h

   1 /*
   2  * SPDX-License-Identifier: GPL-2.0
   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 pmd_t;
  45 typedef unsigned long pgd_t;
  46 typedef unsigned long pgprot_t;
  47
  48 #define pte_val(x)      (x)
  49 #define pmd_val(x)      (x)
  50 #define pgd_val(x)      (x)
  51 #define pgprot_val(x)   (x)
  52
  53 #define __pte(x)        (x)
  54 #define __pmd(x)        (x)
  55 #define __pgd(x)        (x)
  56 #define __pgprot(x)     (x)
  57
  58 typedef struct page *pgtable_t;
  59
  60 #include <asm/memory.h>
  61 #include <asm-generic/getorder.h>
  62
  63 #endif /* !__ASSEMBLY__ */
  64
  65 #define VM_DATA_DEFAULT_FLAGS   (VM_READ | VM_WRITE | VM_EXEC | \
  66                                  VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
  67
  68 #endif /* __KERNEL__ */
  69
  70 #endif