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1/*
2 * linux/fs/ufs/swab.h
3 *
4 * Copyright (C) 1997, 1998 Francois-Rene Rideau <fare@tunes.org>
5 * Copyright (C) 1998 Jakub Jelinek <jj@ultra.linux.cz>
6 * Copyright (C) 2001 Christoph Hellwig <hch@infradead.org>
7 */
8
9#ifndef _UFS_SWAB_H
10#define _UFS_SWAB_H
11
12/*
13 * Notes:
14 * HERE WE ASSUME EITHER BIG OR LITTLE ENDIAN UFSes
15 * in case there are ufs implementations that have strange bytesexes,
16 * you'll need to modify code here as well as in ufs_super.c and ufs_fs.h
17 * to support them.
18 */
19
20enum {
21 BYTESEX_LE,
22 BYTESEX_BE
23};
24
25static inline u64
26fs64_to_cpu(struct super_block *sbp, __fs64 n)
27{
28 if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
29 return le64_to_cpu((__force __le64)n);
30 else
31 return be64_to_cpu((__force __be64)n);
32}
33
34static inline __fs64
35cpu_to_fs64(struct super_block *sbp, u64 n)
36{
37 if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
38 return (__force __fs64)cpu_to_le64(n);
39 else
40 return (__force __fs64)cpu_to_be64(n);
41}
42
43static inline u32
44fs32_to_cpu(struct super_block *sbp, __fs32 n)
45{
46 if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
47 return le32_to_cpu((__force __le32)n);
48 else
49 return be32_to_cpu((__force __be32)n);
50}
51
52static inline __fs32
53cpu_to_fs32(struct super_block *sbp, u32 n)
54{
55 if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
56 return (__force __fs32)cpu_to_le32(n);
57 else
58 return (__force __fs32)cpu_to_be32(n);
59}
60
61static inline void
62fs32_add(struct super_block *sbp, __fs32 *n, int d)
63{
64 if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
65 le32_add_cpu((__le32 *)n, d);
66 else
67 be32_add_cpu((__be32 *)n, d);
68}
69
70static inline void
71fs32_sub(struct super_block *sbp, __fs32 *n, int d)
72{
73 if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
74 le32_add_cpu((__le32 *)n, -d);
75 else
76 be32_add_cpu((__be32 *)n, -d);
77}
78
79static inline u16
80fs16_to_cpu(struct super_block *sbp, __fs16 n)
81{
82 if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
83 return le16_to_cpu((__force __le16)n);
84 else
85 return be16_to_cpu((__force __be16)n);
86}
87
88static inline __fs16
89cpu_to_fs16(struct super_block *sbp, u16 n)
90{
91 if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
92 return (__force __fs16)cpu_to_le16(n);
93 else
94 return (__force __fs16)cpu_to_be16(n);
95}
96
97static inline void
98fs16_add(struct super_block *sbp, __fs16 *n, int d)
99{
100 if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
101 le16_add_cpu((__le16 *)n, d);
102 else
103 be16_add_cpu((__be16 *)n, d);
104}
105
106static inline void
107fs16_sub(struct super_block *sbp, __fs16 *n, int d)
108{
109 if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
110 le16_add_cpu((__le16 *)n, -d);
111 else
112 be16_add_cpu((__be16 *)n, -d);
113}
114
115#endif /* _UFS_SWAB_H */
1/*
2 * linux/fs/ufs/swab.h
3 *
4 * Copyright (C) 1997, 1998 Francois-Rene Rideau <fare@tunes.org>
5 * Copyright (C) 1998 Jakub Jelinek <jj@ultra.linux.cz>
6 * Copyright (C) 2001 Christoph Hellwig <hch@infradead.org>
7 */
8
9#ifndef _UFS_SWAB_H
10#define _UFS_SWAB_H
11
12/*
13 * Notes:
14 * HERE WE ASSUME EITHER BIG OR LITTLE ENDIAN UFSes
15 * in case there are ufs implementations that have strange bytesexes,
16 * you'll need to modify code here as well as in ufs_super.c and ufs_fs.h
17 * to support them.
18 */
19
20enum {
21 BYTESEX_LE,
22 BYTESEX_BE
23};
24
25static inline u64
26fs64_to_cpu(struct super_block *sbp, __fs64 n)
27{
28 if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
29 return le64_to_cpu((__force __le64)n);
30 else
31 return be64_to_cpu((__force __be64)n);
32}
33
34static inline __fs64
35cpu_to_fs64(struct super_block *sbp, u64 n)
36{
37 if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
38 return (__force __fs64)cpu_to_le64(n);
39 else
40 return (__force __fs64)cpu_to_be64(n);
41}
42
43static inline u32
44fs32_to_cpu(struct super_block *sbp, __fs32 n)
45{
46 if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
47 return le32_to_cpu((__force __le32)n);
48 else
49 return be32_to_cpu((__force __be32)n);
50}
51
52static inline __fs32
53cpu_to_fs32(struct super_block *sbp, u32 n)
54{
55 if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
56 return (__force __fs32)cpu_to_le32(n);
57 else
58 return (__force __fs32)cpu_to_be32(n);
59}
60
61static inline void
62fs32_add(struct super_block *sbp, __fs32 *n, int d)
63{
64 if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
65 le32_add_cpu((__le32 *)n, d);
66 else
67 be32_add_cpu((__be32 *)n, d);
68}
69
70static inline void
71fs32_sub(struct super_block *sbp, __fs32 *n, int d)
72{
73 if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
74 le32_add_cpu((__le32 *)n, -d);
75 else
76 be32_add_cpu((__be32 *)n, -d);
77}
78
79static inline u16
80fs16_to_cpu(struct super_block *sbp, __fs16 n)
81{
82 if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
83 return le16_to_cpu((__force __le16)n);
84 else
85 return be16_to_cpu((__force __be16)n);
86}
87
88static inline __fs16
89cpu_to_fs16(struct super_block *sbp, u16 n)
90{
91 if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
92 return (__force __fs16)cpu_to_le16(n);
93 else
94 return (__force __fs16)cpu_to_be16(n);
95}
96
97static inline void
98fs16_add(struct super_block *sbp, __fs16 *n, int d)
99{
100 if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
101 le16_add_cpu((__le16 *)n, d);
102 else
103 be16_add_cpu((__be16 *)n, d);
104}
105
106static inline void
107fs16_sub(struct super_block *sbp, __fs16 *n, int d)
108{
109 if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE)
110 le16_add_cpu((__le16 *)n, -d);
111 else
112 be16_add_cpu((__be16 *)n, -d);
113}
114
115#endif /* _UFS_SWAB_H */