release/src-rt-6.x.4708/linux/linux-2.6.36/arch/arm/include/asm/page-nommu.h

   1 /*
   2  *  arch/arm/include/asm/page-nommu.h
   3  *
   4  *  Copyright (C) 2004 Hyok S. Choi
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10
  11 #ifndef _ASMARM_PAGE_NOMMU_H
  12 #define _ASMARM_PAGE_NOMMU_H
  13
  14 #if !defined(CONFIG_SMALL_TASKS) && PAGE_SHIFT < 13
  15 #define KTHREAD_SIZE (8192)
  16 #else
  17 #define KTHREAD_SIZE PAGE_SIZE
  18 #endif
  19
  20 #define get_user_page(vaddr)            __get_free_page(GFP_KERNEL)
  21 #define free_user_page(page, addr)      free_page(addr)
  22
  23 #define clear_page(page)        memset((page), 0, PAGE_SIZE)
  24 #define copy_page(to,from)      memcpy((to), (from), PAGE_SIZE)
  25
  26 #define clear_user_page(page, vaddr, pg)        clear_page(page)
  27 #define copy_user_page(to, from, vaddr, pg)     copy_page(to, from)
  28
  29 /*
  30  * These are used to make use of C type-checking..
  31  */
  32 typedef unsigned long pte_t;
  33 typedef unsigned long pmd_t;
  34 typedef unsigned long pgd_t[2];
  35 typedef unsigned long pgprot_t;
  36
  37 #define pte_val(x)      (x)
  38 #define pmd_val(x)      (x)
  39 #define pgd_val(x)      ((x)[0])
  40 #define pgprot_val(x)   (x)
  41
  42 #define __pte(x)        (x)
  43 #define __pmd(x)        (x)
  44 #define __pgprot(x)     (x)
  45
  46 #endif