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add lzop decompression support

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Add lzop decompression support to the existing lzo bitstream handling
(think gzip versus zlib), and support it for uImage decompression if
CONFIG_LZO is enabled.

Lzop doesn't compress as good as gzip (~10% worse), but decompression
is very fast (~0.7s faster here on a slow ppc). The lzop decompression
code is based on Albin Tonnerre's recent ARM Linux lzo support patch.

Cc: albin.tonnerre@free-electrons.com
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
This commit is contained in:
Peter Korsgaard 2009-11-19 11:37:51 +01:00 • committed by Wolfgang Denk
parent 3eb90bad65
commit 20dde48bca
5 changed files with 115 additions and 0 deletions
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4
include/linux/lzo.h
View file

@ -27,6 +27,10 @@ int lzo1x_1_compress(const unsigned char *src, size_t src_len,
int lzo1x_decompress_safe(const unsigned char *src, size_t src_len,
unsigned char *dst, size_t *dst_len);
/* decompress lzop format */
int lzop_decompress(const unsigned char *src, size_t src_len,
unsigned char *dst, size_t *dst_len);
/*
* Return values (< 0 = Error)
*/