Root/scripts/brcmImage.pl

1#!/usr/bin/perl
2#
3# Copyright (C) 2009 Henk Vergonet <Henk.Vergonet@gmail.com>
4#
5# This program is free software; you can redistribute it and/or modify
6# it under the terms of the GNU General Public License as published by
7# the Free Software Foundation; either version 2 of the License, or
8# (at your option) any later version.
9#
10# This program is distributed in the hope that it will be useful,
11# but WITHOUT ANY WARRANTY; without even the implied warranty of
12# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13# GNU General Public License for more details.
14#
15# You should have received a copy of the GNU General Public License
16# along with this program; if not, write to the Free Software
17# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
18#
19
20# Description:
21# Replacement for brcmImagebuilder
22#
23# Disclaimer:
24# Use this software at your own risk.
25#
26# Changelog:
27# 2009-01-01 Henk.Vergonet at gmail.com
28#
29use strict;
30use Getopt::Std;
31use Compress::Zlib;
32
33my $version = "0.1";
34my %arg = (
35    o => 'bcm963xx_fs_kernel',
36    b => 'OpenWrt',
37    c => '6348',
38    s => 64,
39    f => 0xbfc00000,
40    x => 0x00010000,
41    a => 0x80010000,
42    e => 0x80010000,
43    i => 2,
44);
45my $prog = $0;
46$prog =~ s/^.*\///;
47getopts("r:k:o:lc:b:s:f:i:a:e:tpvh", \%arg);
48
49die "usage: $prog ~opts~
50
51  -r <file> : input rootfs file
52  -k <file> : input kernel file
53  -o <file> : output image file, default $arg{o}
54  -l : littleendian system, default ".($arg{l} ? 'yes' : 'no')."
55  -c <chipid> : default $arg{c}
56  -b <boardid> : default $arg{b}
57  -s <size_kb> : erase sise flash, default $arg{s}
58  -f <baseaddr> : flash base, default ".sprintf('0x%x', $arg{f})."
59  -x <cfelen> : length of cfe, default ".sprintf('0x%x', $arg{x})."
60  -i : 2=dual image, default $arg{i}
61
62  -a <loadaddr> : Kernel load address, default ".sprintf('0x%x', $arg{a})."
63  -e <entryaddr>: Kernel entry address, default ".sprintf('0x%x', $arg{e})."
64  -t : Prefix kernel with load,entry,size
65
66  -p : Add a 'gOtO' partition
67
68  -v : be more verbose
69  -h : help, version $version
70
71EXAMPLES:
72    $prog -k kern -r rootfs
73" if $arg{h} || !$arg{k} || !$arg{r};
74
75sub Read_Image
76{
77    open my $fh, $_[0] or die "open $_[0]: $!";
78    local $/; # Set input to "slurp" mode.
79    my $buf = <$fh>;
80    close $fh;
81    return $buf;
82}
83
84sub Padlen
85{
86    my $p = $_[0] % $_[1];
87    return ($p ? $_[1] - $p : 0);
88}
89
90sub Pad
91{
92    my ($buf, $off, $bs) = @_[0..2];
93    $buf .= chr(255) x Padlen(length($buf) + $off, $bs);
94    return $buf;
95}
96
97sub bcmImage
98{
99    my ($k, $f) = @_[0..1];
100    my $tmp = $arg{x} + 0x100 + $arg{f};
101    
102    # regular: rootfs+kernel
103    my ($img, $fa, $ka) = ( $f.$k, $tmp, $tmp + length($f) );
104
105    # test: kernel+rootfs
106# my ($img, $fa, $ka) = ( $k.$f, $tmp + length($k), $tmp );
107
108    $fa = 0 unless length($f);
109
110    my $hdr = pack("a4a20a14a6a16a2a10a12a10a12a10a12a10a2a2a74Na16",
111        '6',
112        'LinuxInside',
113        'ver. 2.0',
114        $arg{c},
115        $arg{b},
116        ($arg{l} ? '0' : '1'),
117        length($img),
118        '0',
119        '0',
120        $fa,
121        length($f),
122        $ka,
123        length($k),
124        ($arg{i}==2 ? '1' : '0'),
125        '', # if 1, the image is INACTIVE; if 0, active
126        '',
127        ~crc32($k, crc32($f)),
128        '');
129    $hdr .= pack('Na16', ~crc32($hdr), '');
130
131    printf "kernel at 0x%x length 0x%x(%u)\n", $ka, length($k), length($k)
132        if $arg{v};
133    printf "rootfs at 0x%x length 0x%x(%u)\n", $fa, length($f), length($f)
134        if $arg{v};
135
136    open(FO, ">$arg{o}");
137    print FO $hdr;
138    print FO $img;
139    close FO;
140}
141
142# MAIN
143
144my $kern = Read_Image $arg{k};
145my $root = Read_Image $arg{r};
146
147$kern = pack('NNN', $arg{a}, $arg{e}, length($kern)).$kern if $arg{t};
148
149# specific fixup for the CFE that expects rootfs-kernel order
150if ($arg{p}) {
151    $kern = Pad($kern, 0x10c, $arg{s} * 1024);
152    my $dummy_root = pack('a4NN',
153            'gOtO',
154            length($kern)+12,
155            length($root)+Padlen(length($root), $arg{s} * 1024)
156    );
157    $kern .= $root;
158    $root = $dummy_root;
159}
160
161bcmImage($kern, $root);
162
163

Archive Download this file



interactive