kernel-ark/include/asm-frv/virtconvert.h
Linus Torvalds 1da177e4c3 Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
2005-04-16 15:20:36 -07:00

43 lines
1.1 KiB
C

/* virtconvert.h: virtual/physical/page address convertion
*
* 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 <linux/config.h>
#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