ia64/linux-2.6.18-xen.hg

view fs/jfs/endian24.h @ 524:7f8b544237bf

netfront: Allow netfront in domain 0.

This is useful if your physical network device is in a utility domain.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
author Keir Fraser <keir.fraser@citrix.com>
date Tue Apr 15 15:18:58 2008 +0100 (2008-04-15)
parents 831230e53067
children
line source
1 /*
2 * Copyright (c) International Business Machines Corp., 2001
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
12 * the GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17 */
18 #ifndef _H_ENDIAN24
19 #define _H_ENDIAN24
21 /*
22 * endian24.h:
23 *
24 * Endian conversion for 24-byte data
25 *
26 */
27 #define __swab24(x) \
28 ({ \
29 __u32 __x = (x); \
30 ((__u32)( \
31 ((__x & (__u32)0x000000ffUL) << 16) | \
32 (__x & (__u32)0x0000ff00UL) | \
33 ((__x & (__u32)0x00ff0000UL) >> 16) )); \
34 })
36 #if (defined(__KERNEL__) && defined(__LITTLE_ENDIAN)) || (defined(__BYTE_ORDER) && (__BYTE_ORDER == __LITTLE_ENDIAN))
37 #define __cpu_to_le24(x) ((__u32)(x))
38 #define __le24_to_cpu(x) ((__u32)(x))
39 #else
40 #define __cpu_to_le24(x) __swab24(x)
41 #define __le24_to_cpu(x) __swab24(x)
42 #endif
44 #ifdef __KERNEL__
45 #define cpu_to_le24 __cpu_to_le24
46 #define le24_to_cpu __le24_to_cpu
47 #endif
49 #endif /* !_H_ENDIAN24 */