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author | Florian Fainelli <florian@openwrt.org> | 2010-11-06 18:54:20 +0000 |
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committer | Florian Fainelli <florian@openwrt.org> | 2010-11-06 18:54:20 +0000 |
commit | d9a42c5436a0bdc49696edaf80958cfa9a3f26cc (patch) | |
tree | 8426747c468d82fa0461445c9c616d536cd77534 /target/linux/adm8668/image/lzma-loader/src/decompress.c | |
parent | 1f8f2aaa37114460df167dda37260190e714e6fc (diff) | |
download | master-31e0f0ae-d9a42c5436a0bdc49696edaf80958cfa9a3f26cc.tar.gz master-31e0f0ae-d9a42c5436a0bdc49696edaf80958cfa9a3f26cc.tar.bz2 master-31e0f0ae-d9a42c5436a0bdc49696edaf80958cfa9a3f26cc.zip |
Merge branch 'adm8668'
SVN-Revision: 23900
Diffstat (limited to 'target/linux/adm8668/image/lzma-loader/src/decompress.c')
-rw-r--r-- | target/linux/adm8668/image/lzma-loader/src/decompress.c | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/target/linux/adm8668/image/lzma-loader/src/decompress.c b/target/linux/adm8668/image/lzma-loader/src/decompress.c new file mode 100644 index 0000000000..f328058a16 --- /dev/null +++ b/target/linux/adm8668/image/lzma-loader/src/decompress.c @@ -0,0 +1,118 @@ +/* + * LZMA compressed kernel decompressor for bcm947xx boards + * + * Copyright (C) 2005 by Oleg I. Vdovikin <oleg@cs.msu.su> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + * + * Please note, this was code based on the bunzip2 decompressor code + * by Manuel Novoa III (mjn3@codepoet.org), although the only thing left + * is an idea and part of original vendor code + * + * + * 12-Mar-2005 Mineharu Takahara <mtakahar@yahoo.com> + * pass actual output size to decoder (stream mode + * compressed input is not a requirement anymore) + * + * 24-Apr-2005 Oleg I. Vdovikin + * reordered functions using lds script, removed forward decl + * + * ??-Nov-2005 Mike Baker + * reorder the script as an lzma wrapper; do not depend on flash access + */ + +#include "LzmaDecode.h" +#include <exports.h> + +#define KSEG0ADDR(addr) (0x80000000|addr) + +register volatile gd_t *gd asm ("k0"); +unsigned char *data; + +static __inline__ unsigned char get_byte() +{ + unsigned char *buffer; + + buffer = data; + data++; + + return *buffer; +} + +/* This puts lzma workspace 128k below RAM end. + * That should be enough for both lzma and stack + */ +static char *buffer = (char *)(RAMSTART + RAMSIZE - 0x00020000); +extern char _binary_vmlinux_lzma_start[]; +extern char _binary_vmlinux_lzma_end[]; +extern char lzma_start[]; +extern char lzma_end[]; + +/* should be the first function */ +void entry(unsigned int arg0, unsigned int arg1, + unsigned int arg2, unsigned int arg3) +{ + unsigned int i; /* temp value */ + unsigned int isize; /* compressed size */ + unsigned int osize; /* uncompressed size */ + int argc = arg0; + char **argv = (char **)arg1; + char **envp = (char **)arg2; + + CLzmaDecoderState vs; + + data = (unsigned char *)_binary_vmlinux_lzma_start; + isize = _binary_vmlinux_lzma_end - _binary_vmlinux_lzma_start + 1; + + puts("\nLZMA kernel loader\n"); + + printf("lzma data @ %#x - %#x\n", _binary_vmlinux_lzma_start, _binary_vmlinux_lzma_end); + printf("load addr @ %#x\n\n", KERNEL_ENTRY); + printf("jump table @ %#x\n", gd->jt[3]); + + /* lzma args */ + i = get_byte(); + vs.Properties.lc = i % 9, i = i / 9; + vs.Properties.lp = i % 5, vs.Properties.pb = i / 5; + + vs.Probs = (CProb *)buffer; + + /* skip rest of the LZMA coder property */ + data += 4; + + /* read the lower half of uncompressed size in the header */ + osize = ((unsigned int)get_byte()) + + ((unsigned int)get_byte() << 8) + + ((unsigned int)get_byte() << 16) + + ((unsigned int)get_byte() << 24); + + /* skip rest of the header (upper half of uncompressed size) */ + data += 4; + + /* decompress kernel */ + puts("\nDecompressing kernel..."); + if ((i = LzmaDecode(&vs, + (unsigned char*)data, isize, &isize, + (unsigned char*)KERNEL_ENTRY, osize, &osize)) == LZMA_RESULT_OK) + { + puts("success!\n"); + + /* Jump to load address */ +// ((void (*)(int a0, int a1, int a2, int a3))KERNEL_ENTRY)(0,0,0,0); + ((void (*)(int a0, int a1, int a2, int a3))KERNEL_ENTRY)(arg0, arg1, arg2, arg3); + } + puts("failure!\n"); +} |