| /* SPDX-License-Identifier: GPL-2.0 */ |
| /* |
| * linux/fs/ufs/swab.h |
| * |
| * Copyright (C) 1997, 1998 Francois-Rene Rideau <fare@tunes.org> |
| * Copyright (C) 1998 Jakub Jelinek <jj@ultra.linux.cz> |
| * Copyright (C) 2001 Christoph Hellwig <hch@infradead.org> |
| */ |
| |
| #ifndef _UFS_SWAB_H |
| #define _UFS_SWAB_H |
| |
| /* |
| * Notes: |
| * 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. |
| */ |
| |
| enum { |
| BYTESEX_LE, |
| BYTESEX_BE |
| }; |
| |
| static inline u64 |
| fs64_to_cpu(struct super_block *sbp, __fs64 n) |
| { |
| if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE) |
| return le64_to_cpu((__force __le64)n); |
| else |
| return be64_to_cpu((__force __be64)n); |
| } |
| |
| static inline __fs64 |
| cpu_to_fs64(struct super_block *sbp, u64 n) |
| { |
| if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE) |
| return (__force __fs64)cpu_to_le64(n); |
| else |
| return (__force __fs64)cpu_to_be64(n); |
| } |
| |
| static inline u32 |
| fs32_to_cpu(struct super_block *sbp, __fs32 n) |
| { |
| if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE) |
| return le32_to_cpu((__force __le32)n); |
| else |
| return be32_to_cpu((__force __be32)n); |
| } |
| |
| static inline __fs32 |
| cpu_to_fs32(struct super_block *sbp, u32 n) |
| { |
| if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE) |
| return (__force __fs32)cpu_to_le32(n); |
| else |
| return (__force __fs32)cpu_to_be32(n); |
| } |
| |
| static inline void |
| fs32_add(struct super_block *sbp, __fs32 *n, int d) |
| { |
| if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE) |
| le32_add_cpu((__le32 *)n, d); |
| else |
| be32_add_cpu((__be32 *)n, d); |
| } |
| |
| static inline void |
| fs32_sub(struct super_block *sbp, __fs32 *n, int d) |
| { |
| if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE) |
| le32_add_cpu((__le32 *)n, -d); |
| else |
| be32_add_cpu((__be32 *)n, -d); |
| } |
| |
| static inline u16 |
| fs16_to_cpu(struct super_block *sbp, __fs16 n) |
| { |
| if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE) |
| return le16_to_cpu((__force __le16)n); |
| else |
| return be16_to_cpu((__force __be16)n); |
| } |
| |
| static inline __fs16 |
| cpu_to_fs16(struct super_block *sbp, u16 n) |
| { |
| if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE) |
| return (__force __fs16)cpu_to_le16(n); |
| else |
| return (__force __fs16)cpu_to_be16(n); |
| } |
| |
| static inline void |
| fs16_add(struct super_block *sbp, __fs16 *n, int d) |
| { |
| if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE) |
| le16_add_cpu((__le16 *)n, d); |
| else |
| be16_add_cpu((__be16 *)n, d); |
| } |
| |
| static inline void |
| fs16_sub(struct super_block *sbp, __fs16 *n, int d) |
| { |
| if (UFS_SB(sbp)->s_bytesex == BYTESEX_LE) |
| le16_add_cpu((__le16 *)n, -d); |
| else |
| be16_add_cpu((__be16 *)n, -d); |
| } |
| |
| #endif /* _UFS_SWAB_H */ |