mirror of https://github.com/hak5/openwrt.git
56 lines
2.4 KiB
Plaintext
56 lines
2.4 KiB
Plaintext
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/*
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* LZMA compressed kernel decompressor for bcm947xx boards
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*
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* Copyright (C) 2005 by Oleg I. Vdovikin <oleg@cs.msu.su>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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The code is intended to decompress kernel, being compressed using lzma utility
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build using 7zip LZMA SDK. This utility is located in the LZMA_Alone directory
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decompressor code expects that your .trx file consist of three partitions:
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1) decompressor itself (this is gziped code which pmon/cfe will extract and run
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on boot-up instead of real kernel)
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2) LZMA compressed kernel (both streamed and regular modes are supported now)
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3) Root filesystem
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Please be sure to apply the following patch for use this new trx layout (it will
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allow using both new and old trx files for root filesystem lookup code)
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--- linuz/arch/mips/brcm-boards/bcm947xx/setup.c 2005-01-23 19:24:27.503322896 +0300
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+++ linux/arch/mips/brcm-boards/bcm947xx/setup.c 2005-01-23 19:29:05.237100944 +0300
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@@ -221,7 +221,9 @@
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/* Try looking at TRX header for rootfs offset */
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if (le32_to_cpu(trx->magic) == TRX_MAGIC) {
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bcm947xx_parts[1].offset = off;
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- if (le32_to_cpu(trx->offsets[1]) > off)
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+ if (le32_to_cpu(trx->offsets[2]) > off)
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+ off = le32_to_cpu(trx->offsets[2]);
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+ else if (le32_to_cpu(trx->offsets[1]) > off)
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off = le32_to_cpu(trx->offsets[1]);
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continue;
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}
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Revision history:
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0.02 Initial release
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0.03 Added Mineharu Takahara <mtakahar@yahoo.com> patch to pass actual
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output size to decoder (stream mode compressed input is not
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a requirement anymore)
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0.04 Reordered functions using lds script
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