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

   1/*
   2 * linux/arch/unicore32/include/asm/page.h
   3 *
   4 * Code specific to PKUnity SoC and UniCore ISA
   5 *
   6 * Copyright (C) 2001-2010 GUAN Xue-tao
   7 *
   8 * This program is free software; you can redistribute it and/or modify
   9 * it under the terms of the GNU General Public License version 2 as
  10 * published by the Free Software Foundation.
  11 */
  12#ifndef __UNICORE_PAGE_H__
  13#define __UNICORE_PAGE_H__
  14
  15/* PAGE_SHIFT determines the page size */
  16#define PAGE_SHIFT              12
  17#define PAGE_SIZE               (_AC(1, UL) << PAGE_SHIFT)
  18#define PAGE_MASK               (~(PAGE_SIZE-1))
  19
  20#ifndef __ASSEMBLY__
  21
  22struct page;
  23struct vm_area_struct;
  24
  25#define clear_page(page)        memset((void *)(page), 0, PAGE_SIZE)
  26extern void copy_page(void *to, const void *from);
  27
  28#define clear_user_page(page, vaddr, pg)        clear_page(page)
  29#define copy_user_page(to, from, vaddr, pg)     copy_page(to, from)
  30
  31#undef STRICT_MM_TYPECHECKS
  32
  33#ifdef STRICT_MM_TYPECHECKS
  34/*
  35 * These are used to make use of C type-checking..
  36 */
  37typedef struct { unsigned long pte; } pte_t;
  38typedef struct { unsigned long pgd; } pgd_t;
  39typedef struct { unsigned long pgprot; } pgprot_t;
  40
  41#define pte_val(x)      ((x).pte)
  42#define pgd_val(x)      ((x).pgd)
  43#define pgprot_val(x)   ((x).pgprot)
  44
  45#define __pte(x)        ((pte_t) { (x) })
  46#define __pgd(x)        ((pgd_t) { (x) })
  47#define __pgprot(x)     ((pgprot_t) { (x) })
  48
  49#else
  50/*
  51 * .. while these make it easier on the compiler
  52 */
  53typedef unsigned long pte_t;
  54typedef unsigned long pgd_t;
  55typedef unsigned long pgprot_t;
  56
  57#define pte_val(x)      (x)
  58#define pgd_val(x)      (x)
  59#define pgprot_val(x)   (x)
  60
  61#define __pte(x)        (x)
  62#define __pgd(x)        (x)
  63#define __pgprot(x)     (x)
  64
  65#endif /* STRICT_MM_TYPECHECKS */
  66
  67typedef struct page *pgtable_t;
  68
  69extern int pfn_valid(unsigned long);
  70
  71#include <asm/memory.h>
  72
  73#endif /* !__ASSEMBLY__ */
  74
  75#define VM_DATA_DEFAULT_FLAGS \
  76        (VM_READ | VM_WRITE | VM_EXEC | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
  77
  78#include <asm-generic/getorder.h>
  79
  80#endif
  81