LXR linux/arch/unicore32/include/asm/page.h

   1/* SPDX-License-Identifier: GPL-2.0-only */
   2/*
   3 * linux/arch/unicore32/include/asm/page.h
   4 *
   5 * Code specific to PKUnity SoC and UniCore ISA
   6 *
   7 * Copyright (C) 2001-2010 GUAN Xue-tao
   8 */
   9#ifndef __UNICORE_PAGE_H__
  10#define __UNICORE_PAGE_H__
  11
  12/* PAGE_SHIFT determines the page size */
  13#define PAGE_SHIFT              12
  14#define PAGE_SIZE               (_AC(1, UL) << PAGE_SHIFT)
  15#define PAGE_MASK               (~(PAGE_SIZE-1))
  16
  17#ifndef __ASSEMBLY__
  18
  19struct page;
  20struct vm_area_struct;
  21
  22#define clear_page(page)        memset((void *)(page), 0, PAGE_SIZE)
  23extern void copy_page(void *to, const void *from);
  24
  25#define clear_user_page(page, vaddr, pg)        clear_page(page)
  26#define copy_user_page(to, from, vaddr, pg)     copy_page(to, from)
  27
  28#undef STRICT_MM_TYPECHECKS
  29
  30#ifdef STRICT_MM_TYPECHECKS
  31/*
  32 * These are used to make use of C type-checking..
  33 */
  34typedef struct { unsigned long pte; } pte_t;
  35typedef struct { unsigned long pgd; } pgd_t;
  36typedef struct { unsigned long pgprot; } pgprot_t;
  37
  38#define pte_val(x)      ((x).pte)
  39#define pgd_val(x)      ((x).pgd)
  40#define pgprot_val(x)   ((x).pgprot)
  41
  42#define __pte(x)        ((pte_t) { (x) })
  43#define __pgd(x)        ((pgd_t) { (x) })
  44#define __pgprot(x)     ((pgprot_t) { (x) })
  45
  46#else
  47/*
  48 * .. while these make it easier on the compiler
  49 */
  50typedef unsigned long pte_t;
  51typedef unsigned long pgd_t;
  52typedef unsigned long pgprot_t;
  53
  54#define pte_val(x)      (x)
  55#define pgd_val(x)      (x)
  56#define pgprot_val(x)   (x)
  57
  58#define __pte(x)        (x)
  59#define __pgd(x)        (x)
  60#define __pgprot(x)     (x)
  61
  62#endif /* STRICT_MM_TYPECHECKS */
  63
  64typedef struct page *pgtable_t;
  65
  66extern int pfn_valid(unsigned long);
  67
  68#include <asm/memory.h>
  69
  70#endif /* !__ASSEMBLY__ */
  71
  72#define VM_DATA_DEFAULT_FLAGS \
  73        (VM_READ | VM_WRITE | VM_EXEC | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
  74
  75#include <asm-generic/getorder.h>
  76
  77#endif
  78