diff options
author | Stefan Roese <sr@denx.de> | 2009-03-19 17:35:05 +0300 |
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committer | Wolfgang Denk <wd@denx.de> | 2009-03-21 00:39:15 +0300 |
commit | 9eefe2a2b37a838558e3d213a9f5519503d0c180 (patch) | |
tree | cd6ce359f020615d685d353fc3a20e7e07ac05fc /fs/ubifs/crc16.h | |
parent | b1b4e89a0f3b75854c39a62cae41bad56d210adf (diff) | |
download | u-boot-9eefe2a2b37a838558e3d213a9f5519503d0c180.tar.xz |
UBIFS: Implement read-only UBIFS support in U-Boot
The U-Boot UBIFS implementation is largely a direct copy from the current
Linux version (2.6.29-rc6). As already done in the UBI version we have an
"abstraction layer" to redefine or remove some OS calls (e.g. mutex_lock()
...). This makes it possible to use the original Linux code with very
little changes. And by this we can better update to later Linux versions.
I removed some of the Linux features that are not used in the U-Boot
version (e.g. garbage-collection, write support).
Signed-off-by: Stefan Roese <sr@denx.de>
CC: Artem Bityutskiy <dedekind@infradead.org>
CC: Adrian Hunter <ext-Adrian.Hunter@nokia.com>
Diffstat (limited to 'fs/ubifs/crc16.h')
-rw-r--r-- | fs/ubifs/crc16.h | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/fs/ubifs/crc16.h b/fs/ubifs/crc16.h new file mode 100644 index 0000000000..9443c084f8 --- /dev/null +++ b/fs/ubifs/crc16.h @@ -0,0 +1,30 @@ +/* + * crc16.h - CRC-16 routine + * + * Implements the standard CRC-16: + * Width 16 + * Poly 0x8005 (x^16 + x^15 + x^2 + 1) + * Init 0 + * + * Copyright (c) 2005 Ben Gardner <bgardner@wabtec.com> + * + * This source code is licensed under the GNU General Public License, + * Version 2. See the file COPYING for more details. + */ + +#ifndef __CRC16_H +#define __CRC16_H + +#include <linux/types.h> + +extern u16 const crc16_table[256]; + +extern u16 crc16(u16 crc, const u8 *buffer, size_t len); + +static inline u16 crc16_byte(u16 crc, const u8 data) +{ + return (crc >> 8) ^ crc16_table[(crc ^ data) & 0xff]; +} + +#endif /* __CRC16_H */ + |