2 * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
4 * Copyright (C) 2002-2007 Aleph One Ltd.
5 * for Toby Churchill Ltd and Brightstar Engineering
7 * Created by Martin Fouts <Martin.Fouts@palmsource.com>
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_CONFIG_H__
17 #define __YAFFS_CONFIG_H__
19 #ifdef YAFFS_OUT_OF_TREE
21 /* DO NOT UNSET THESE THREE. YAFFS2 will not compile if you do. */
22 #define CONFIG_YAFFS_FS
23 #define CONFIG_YAFFS_YAFFS1
24 #define CONFIG_YAFFS_YAFFS2
26 /* These options are independent of each other. Select those that matter. */
28 /* Default: Not selected */
29 /* Meaning: Yaffs does its own ECC, rather than using MTD ECC */
30 /* #define CONFIG_YAFFS_DOES_ECC */
32 /* Default: Selected */
33 /* Meaning: Yaffs does its own ECC on tags for packed tags rather than use mtd */
34 #define CONFIG_YAFFS_DOES_TAGS_ECC
36 /* Default: Not selected */
37 /* Meaning: ECC byte order is 'wrong'. Only meaningful if */
38 /* CONFIG_YAFFS_DOES_ECC is set */
39 /* #define CONFIG_YAFFS_ECC_WRONG_ORDER */
41 /* Default: Selected */
42 /* Meaning: Disables testing whether chunks are erased before writing to them*/
43 #define CONFIG_YAFFS_DISABLE_CHUNK_ERASED_CHECK
45 /* Default: Not Selected */
46 /* Meaning: At mount automatically empty all files from lost and found. */
47 /* This is done to fix an old problem where rmdir was not checking for an */
48 /* empty directory. This can also be achieved with a mount option. */
49 /* #define CONFIG_YAFFS_EMPTY_LOST_AND_FOUND */
51 /* Default: Selected */
52 /* Meaning: Cache short names, taking more RAM, but faster look-ups */
53 #define CONFIG_YAFFS_SHORT_NAMES_IN_RAM
56 /* Meaning: set the count of blocks to reserve for checkpointing */
57 #define CONFIG_YAFFS_CHECKPOINT_RESERVED_BLOCKS 10
60 Older-style on-NAND data format has a "pageStatus" byte to record
61 chunk/page state. This byte is zeroed when the page is discarded.
62 Choose this option if you have existing on-NAND data in this format
63 that you need to continue to support. New data written also uses the
65 Note: Use of this option generally requires that MTD's oob layout be
66 adjusted to use the older-style format. See notes on tags formats and
67 MTD versions in yaffs_mtdif1.c.
69 /* Default: Not selected */
70 /* Meaning: Use older-style on-NAND data format with pageStatus byte */
71 /* #define CONFIG_YAFFS_9BYTE_TAGS */
73 #endif /* YAFFS_OUT_OF_TREE */
75 #endif /* __YAFFS_CONFIG_H__ */