#ifndef __VIRT_CONVERT__
  #define __VIRT_CONVERT__
  
  /*
   * Macros used for converting between virtual and physical mappings.
   */
  
  #ifdef __KERNEL__

  #include <linux/compiler.h>

  #include <linux/mmzone.h>

  #include <asm/setup.h>
  #include <asm/page.h>

  /*
   * Change virtual addresses to physical addresses and vv.
   */

  static inline unsigned long virt_to_phys(void *address)
  {

  	return __pa(address);

  }
  
  static inline void *phys_to_virt(unsigned long address)
  {

  	return __va(address);

  }

  
  /* Permanent address of a page. */

  #ifdef CONFIG_MMU

  #ifdef CONFIG_SINGLE_MEMORY_CHUNK
  #define page_to_phys(page) \
  	__pa(PAGE_OFFSET + (((page) - pg_data_map[0].node_mem_map) << PAGE_SHIFT))
  #else

  #define page_to_phys(page)	(page_to_pfn(page) << PAGE_SHIFT)

  #endif

  #else
  #define page_to_phys(page)	(((page) - mem_map) << PAGE_SHIFT)
  #endif

  
  /*
   * IO bus memory addresses are 1:1 with the physical address,

   */

  #define virt_to_bus virt_to_phys
  #define bus_to_virt phys_to_virt

  
  #endif
  #endif