2 * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
4 * Copyright (C) 2002-2011 Aleph One Ltd.
5 * for Toby Churchill Ltd and Brightstar Engineering
7 * Created by Charles Manning <charles@aleph1.co.uk>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU Lesser General Public License version 2.1 as
11 * published by the Free Software Foundation.
13 * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
16 #ifndef __YAFFS_ENDIAN_H__
17 #define __YAFFS_ENDIAN_H__
18 #include "yaffs_guts.h"
19 #include "yaffs_packedtags2.h"
21 static inline u32 swap_u32(u32 val)
23 return ((val >>24) & 0x000000ff) |
24 ((val >> 8) & 0x0000ff00) |
25 ((val << 8) & 0x00ff0000) |
26 ((val <<24) & 0xff000000);
29 #define swap_s32(val) \
30 (s32)(swap_u32((u32)(val)))
32 static inline Y_LOFF_T swap_loff_t(Y_LOFF_T lval)
34 u32 vall = swap_u32((u32) (lval & 0xffffffff));
37 if (sizeof(Y_LOFF_T) == sizeof(u32))
38 return (Y_LOFF_T) vall;
40 valh = swap_u32((u32) ((lval >> 32) & 0xffffffff));
42 return (Y_LOFF_T)((((u64)vall) << 32) | valh);
45 void yaffs_do_endian_s32(struct yaffs_dev *dev, s32 *val);
46 void yaffs_do_endian_u32(struct yaffs_dev *dev, u32 *val);
47 void yaffs_do_endian_oh(struct yaffs_dev *dev, struct yaffs_obj_hdr *oh);
48 void yaffs_do_endian_packed_tags2(struct yaffs_dev *dev,
49 struct yaffs_packed_tags2_tags_only *ptt);
50 void yaffs_endian_config(struct yaffs_dev *dev);