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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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22
common/cmd_bootm.c
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@@ -57,6 +57,10 @@
#include <lzma/LzmaTools.h>
#endif /* CONFIG_LZMA */
#ifdef CONFIG_LZO
#include <linux/lzo.h>
#endif /* CONFIG_LZO */
DECLARE_GLOBAL_DATA_PTR;
extern int gunzip (void *dst, int dstlen, unsigned char *src, unsigned long *lenp);
@@ -405,6 +409,24 @@ static int bootm_load_os(image_info_t os, ulong *load_end, int boot_progress)
*load_end = load + unc_len;
break;
#endif /* CONFIG_LZMA */
#ifdef CONFIG_LZO
case IH_COMP_LZO:
printf (" Uncompressing %s ... ", type_name);
int ret = lzop_decompress((const unsigned char *)image_start,
image_len, (unsigned char *)load,
&unc_len);
if (ret != LZO_E_OK) {
printf ("LZO: uncompress or overwrite error %d "
"- must RESET board to recover\n", ret);
if (boot_progress)
show_boot_progress (-6);
return BOOTM_ERR_RESET;
}
*load_end = load + unc_len;
break;
#endif /* CONFIG_LZO */
default:
printf ("Unimplemented compression type %d\n", comp);
return BOOTM_ERR_UNIMPLEMENTED;