2011-03-30 22:57:33 -03:00
|
|
|
/* virtconvert.h: virtual/physical/page address conversion
|
2005-04-16 15:20:36 -07:00
|
|
|
*
|
|
|
|
|
* Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
|
|
|
|
|
* Written by David Howells (dhowells@redhat.com)
|
|
|
|
|
*
|
|
|
|
|
* This program is free software; you can redistribute it and/or
|
|
|
|
|
* modify it under the terms of the GNU General Public License
|
|
|
|
|
* as published by the Free Software Foundation; either version
|
|
|
|
|
* 2 of the License, or (at your option) any later version.
|
|
|
|
|
*/
|
|
|
|
|
#ifndef _ASM_VIRTCONVERT_H
|
|
|
|
|
#define _ASM_VIRTCONVERT_H
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Macros used for converting between virtual and physical mappings.
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
|
|
|
|
|
|
#include <asm/setup.h>
|
|
|
|
|
|
|
|
|
|
#ifdef CONFIG_MMU
|
|
|
|
|
|
|
|
|
|
#define phys_to_virt(vaddr) ((void *) ((unsigned long)(vaddr) + PAGE_OFFSET))
|
|
|
|
|
#define virt_to_phys(vaddr) ((unsigned long) (vaddr) - PAGE_OFFSET)
|
|
|
|
|
|
|
|
|
|
#else
|
|
|
|
|
|
|
|
|
|
#define phys_to_virt(vaddr) ((void *) (vaddr))
|
|
|
|
|
#define virt_to_phys(vaddr) ((unsigned long) (vaddr))
|
|
|
|
|
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
#define virt_to_bus virt_to_phys
|
|
|
|
|
#define bus_to_virt phys_to_virt
|
|
|
|
|
|
|
|
|
|
#define __page_address(page) (PAGE_OFFSET + (((page) - mem_map) << PAGE_SHIFT))
|
|
|
|
|
#define page_to_phys(page) virt_to_phys((void *)__page_address(page))
|
|
|
|
|
|
|
|
|
|
#endif
|
|
|
|
|
#endif
|
