mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-13 14:46:21 +09:00
b1b4e89a0f
This patch adds LZO decompression support to U-Boot. It is needed for the upcoming UBIFS support, since UBIFS uses LZO as default compressor/ decompressor. Since we only support read-only in UBIFS, only the decompressor is needed. All this is copied with minor changes from the current Linux kernel version (2.6.28-rc8). This patch only implements this LZO decompressor support for PPC. Other platforms using UBIFS will have to add the required "include/asm/unaligned.h" as well. It should be fairly easy to copy this from the Linux source tree as I have done it for PPC in this patch. Signed-off-by: Stefan Roese <sr@denx.de>
44 lines
1.1 KiB
C
44 lines
1.1 KiB
C
/*
|
|
* lzodefs.h -- architecture, OS and compiler specific defines
|
|
*
|
|
* Copyright (C) 1996-2005 Markus F.X.J. Oberhumer <markus@oberhumer.com>
|
|
*
|
|
* The full LZO package can be found at:
|
|
* http://www.oberhumer.com/opensource/lzo/
|
|
*
|
|
* Changed for kernel use by:
|
|
* Nitin Gupta <nitingupta910@gmail.com>
|
|
* Richard Purdie <rpurdie@openedhand.com>
|
|
*/
|
|
|
|
#define LZO_VERSION 0x2020
|
|
#define LZO_VERSION_STRING "2.02"
|
|
#define LZO_VERSION_DATE "Oct 17 2005"
|
|
|
|
#define M1_MAX_OFFSET 0x0400
|
|
#define M2_MAX_OFFSET 0x0800
|
|
#define M3_MAX_OFFSET 0x4000
|
|
#define M4_MAX_OFFSET 0xbfff
|
|
|
|
#define M1_MIN_LEN 2
|
|
#define M1_MAX_LEN 2
|
|
#define M2_MIN_LEN 3
|
|
#define M2_MAX_LEN 8
|
|
#define M3_MIN_LEN 3
|
|
#define M3_MAX_LEN 33
|
|
#define M4_MIN_LEN 3
|
|
#define M4_MAX_LEN 9
|
|
|
|
#define M1_MARKER 0
|
|
#define M2_MARKER 64
|
|
#define M3_MARKER 32
|
|
#define M4_MARKER 16
|
|
|
|
#define D_BITS 14
|
|
#define D_MASK ((1u << D_BITS) - 1)
|
|
#define D_HIGH ((D_MASK >> 1) + 1)
|
|
|
|
#define DX2(p, s1, s2) (((((size_t)((p)[2]) << (s2)) ^ (p)[1]) \
|
|
<< (s1)) ^ (p)[0])
|
|
#define DX3(p, s1, s2, s3) ((DX2((p)+1, s2, s3) << (s1)) ^ (p)[0])
|