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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/asm-frv/virtconvert.h
Linux-2.6.12-rc2v2.6.12-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!
Diffstat (limited to 'include/asm-frv/virtconvert.h')
-rw-r--r--include/asm-frv/virtconvert.h42
1 files changed, 42 insertions, 0 deletions
diff --git a/include/asm-frv/virtconvert.h b/include/asm-frv/virtconvert.h
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1/* virtconvert.h: virtual/physical/page address convertion
2 *
3 * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 */
11#ifndef _ASM_VIRTCONVERT_H
12#define _ASM_VIRTCONVERT_H
13
14/*
15 * Macros used for converting between virtual and physical mappings.
16 */
17
18#ifdef __KERNEL__
19
20#include <linux/config.h>
21#include <asm/setup.h>
22
23#ifdef CONFIG_MMU
24
25#define phys_to_virt(vaddr) ((void *) ((unsigned long)(vaddr) + PAGE_OFFSET))
26#define virt_to_phys(vaddr) ((unsigned long) (vaddr) - PAGE_OFFSET)
27
28#else
29
30#define phys_to_virt(vaddr) ((void *) (vaddr))
31#define virt_to_phys(vaddr) ((unsigned long) (vaddr))
32
33#endif
34
35#define virt_to_bus virt_to_phys
36#define bus_to_virt phys_to_virt
37
38#define __page_address(page) (PAGE_OFFSET + (((page) - mem_map) << PAGE_SHIFT))
39#define page_to_phys(page) virt_to_phys((void *)__page_address(page))
40
41#endif
42#endif