1 /*
2  * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
3  *
4  * Copyright (C) 2002-2011 Aleph One Ltd.
5  *   for Toby Churchill Ltd and Brightstar Engineering
6  *
7  * Created by Charles Manning <charles@aleph1.co.uk>
8  *
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.
12  *
13  * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
14  */
15 
16 /* This is used to pack YAFFS1 tags, not YAFFS2 tags. */
17 
18 #ifndef __YAFFS_PACKEDTAGS1_H__
19 #define __YAFFS_PACKEDTAGS1_H__
20 
21 #include "yaffs_guts.h"
22 
23 struct yaffs_packed_tags1 {
24 	unsigned chunk_id:20;
25 	unsigned serial_number:2;
26 	unsigned n_bytes:10;
27 	unsigned obj_id:18;
28 	unsigned ecc:12;
29 	unsigned deleted:1;
30 	unsigned unused_stuff:1;
31 	unsigned should_be_ff;
32 
33 };
34 
35 void yaffs_pack_tags1(struct yaffs_packed_tags1 *pt,
36 		      const struct yaffs_ext_tags *t);
37 void yaffs_unpack_tags1(struct yaffs_ext_tags *t,
38 			const struct yaffs_packed_tags1 *pt);
39 #endif
40