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| author | Charles Manning <cdhmanning@gmail.com> | 2012-05-09 16:55:17 +0000 |
|---|---|---|
| committer | Wolfgang Denk <wd@denx.de> | 2012-08-09 23:39:18 +0200 |
| commit | 753ac610880e6e563d0384bb114f8b41df89e520 (patch) | |
| tree | 049dc45790bc6f66dd696d4cd671fd6a2cae4473 /fs/yaffs2/yaffs_hweight.c | |
| parent | 3874a377451e4d1f45710f5bf801dd96e8b8f67e (diff) | |
| download | u-boot-imx-753ac610880e6e563d0384bb114f8b41df89e520.zip u-boot-imx-753ac610880e6e563d0384bb114f8b41df89e520.tar.gz u-boot-imx-753ac610880e6e563d0384bb114f8b41df89e520.tar.bz2 | |
u-boot: Update yaffs2 file system
This patch updates the yaffs2 in u-boot to correspond to
git://www.aleph1.co.uk/yaffs2
commit id 9ee5d0643e559568dbe62215f76e0a7bd5a63d93
Signed-off-by: Charles Manning <cdhmanning@gmail.com>
Diffstat (limited to 'fs/yaffs2/yaffs_hweight.c')
| -rw-r--r-- | fs/yaffs2/yaffs_hweight.c | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/fs/yaffs2/yaffs_hweight.c b/fs/yaffs2/yaffs_hweight.c new file mode 100644 index 0000000..d96773e --- /dev/null +++ b/fs/yaffs2/yaffs_hweight.c @@ -0,0 +1,52 @@ +/* + * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. + * + * Copyright (C) 2002-2011 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +/* These functions have been renamed to hweightxx to match the + * equivaqlent functions in the Linux kernel. + */ + +#include "yaffs_hweight.h" + +static const char yaffs_count_bits_table[256] = { + 0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4, + 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5, + 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5, + 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, + 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5, + 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, + 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, + 3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7, + 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5, + 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, + 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, + 3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7, + 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, + 3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7, + 3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7, + 4, 5, 5, 6, 5, 6, 6, 7, 5, 6, 6, 7, 6, 7, 7, 8 +}; + +int yaffs_hweight8(u8 x) +{ + int ret_val; + ret_val = yaffs_count_bits_table[x]; + return ret_val; +} + +int yaffs_hweight32(u32 x) +{ + return yaffs_hweight8(x & 0xff) + + yaffs_hweight8((x >> 8) & 0xff) + + yaffs_hweight8((x >> 16) & 0xff) + + yaffs_hweight8((x >> 24) & 0xff); +} |