blob: 921fb3d795114bcd38b5c915ea98c7ccc0df3691 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
|
/*
* linux/fs/ufs/ufs_swab.h
*
* Copyright (C) 1997
* Francois-Rene Rideau <rideau@ens.fr>
*
*/
#ifndef _UFS_SWAB_H
#define _UFS_SWAB_H
/*
* Notes:
* (1) HERE WE ASSUME EITHER BIG OR LITTLE ENDIAN UFSes
* in case there are ufs implementations that have strange bytesexes,
* you'll need to modify code here as well as in ufs_super.c and ufs_fs.h
* to support them.
* (2) for a read/write ufs driver, we should distinguish
* between byteswapping for read or write accesses!
*/
#include <linux/ufs_fs.h>
#include <asm/byteorder.h>
/*
* These are only valid inside ufs routines,
* after bytesex has been initialized to sb->u.ufs_sb.s_flags&UFS_BYTESEX
*/
#define SWAB16(x) ufs_swab16(bytesex,x)
#define SWAB32(x) ufs_swab32(bytesex,x)
#define SWAB64(x) ufs_swab64(bytesex,x)
extern __inline__ __const__ __u16 ufs_swab16(__u32 bytesex, __u16 x) {
if (bytesex == UFS_LITTLE_ENDIAN) {
return le16_to_cpu(x);
} else {
return be16_to_cpu(x);
}
}
extern __inline__ __const__ __u32 ufs_swab32(__u32 bytesex, __u32 x) {
if (bytesex == UFS_LITTLE_ENDIAN) {
return le32_to_cpu(x);
} else {
return be32_to_cpu(x);
}
}
extern __inline__ __const__ __u64 ufs_swab64(__u32 bytesex, __u64 x) {
if (bytesex == UFS_LITTLE_ENDIAN) {
return le64_to_cpu(x);
} else {
return be64_to_cpu(x);
}
}
extern void ufs_superblock_le_to_cpus(struct ufs_superblock * usb);
extern void ufs_superblock_be_to_cpus(struct ufs_superblock * usb);
#endif /* _UFS_SWAB_H */
|
