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Add support for LZ4 decompression algorithm

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This patch adds support for LZ4-compressed FIT image contents. This
algorithm has a slightly worse compression ration than LZO while being
nearly twice as fast to decompress. When loading images from a fast
storage medium this usually results in a boot time win.

Sandbox-tested only since I don't have a U-Boot development system set
up right now. The code was imported unchanged from coreboot where it's
proven to work, though. I'm mostly interested in getting this recognized
by mkImage for use in a downstream project.

Signed-off-by: Julius Werner <jwerner@chromium.org>
Acked-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Julius Werner
2015-10-06 20:03:53 -07:00
committed by Tom Rini
parent b6b5e394db
commit 027b728d4a
10 changed files with 471 additions and 0 deletions
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9
common/bootm.c
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@@ -389,6 +389,15 @@ int bootm_decomp_image(int comp, ulong load, ulong image_start, int type,
break;
}
#endif /* CONFIG_LZO */
#ifdef CONFIG_LZ4
case IH_COMP_LZ4: {
size_t size = unc_len;
ret = ulz4fn(image_buf, image_len, load_buf, &size);
image_len = size;
break;
}
#endif /* CONFIG_LZ4 */
default:
printf("Unimplemented compression type %d\n", comp);
return BOOTM_ERR_UNIMPLEMENTED;