include/asm-arm/page-nommu.h

   1 /*
   2  *  linux/include/asm-arm/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 #ifndef _ASMARM_PAGE_NOMMU_H
  11 #define _ASMARM_PAGE_NOMMU_H
  12
  13 #if !defined(CONFIG_SMALL_TASKS) && PAGE_SHIFT < 13
  14 #define KTHREAD_SIZE (8192)
  15 #else
  16 #define KTHREAD_SIZE PAGE_SIZE
  17 #endif
  18
  19 #define get_user_page(vaddr)            __get_free_page(GFP_KERNEL)
  20 #define free_user_page(page, addr)      free_page(addr)
  21
  22 #define clear_page(page)        memset((page), 0, PAGE_SIZE)
  23 #define copy_page(to,from)      memcpy((to), (from), PAGE_SIZE)
  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 /*
  29  * These are used to make use of C type-checking..
  30  */
  31 typedef unsigned long pte_t;
  32 typedef unsigned long pmd_t;
  33 typedef unsigned long pgd_t[2];
  34 typedef unsigned long pgprot_t;
  35
  36 #define pte_val(x)      (x)
  37 #define pmd_val(x)      (x)
  38 #define pgd_val(x)      ((x)[0])
  39 #define pgprot_val(x)   (x)
  40
  41 #define __pte(x)        (x)
  42 #define __pmd(x)        (x)
  43 #define __pgprot(x)     (x)
  44
  45 /* to align the pointer to the (next) page boundary */
  46 #define PAGE_ALIGN(addr)        (((addr)+PAGE_SIZE-1)&PAGE_MASK)
  47
  48 extern unsigned long memory_start;
  49 extern unsigned long memory_end;
  50
  51 #endif