AR71xx/9xxx based routers are the most common these days, select that as the default...
[openwrt/svn-archive/archive.git] / 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 #
29 use strict;
30 use Getopt::Std;
31 use Compress::Zlib;
32
33 my $version = "0.1";
34 my %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 );
45 my $prog = $0;
46 $prog =~ s/^.*\///;
47 getopts("r:k:o:lc:b:s:f:i:a:e:tpvh", \%arg);
48
49 die "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
71 EXAMPLES:
72 $prog -k kern -r rootfs
73 " if $arg{h} || !$arg{k} || !$arg{r};
74
75 sub 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
84 sub Padlen
85 {
86 my $p = $_[0] % $_[1];
87 return ($p ? $_[1] - $p : 0);
88 }
89
90 sub Pad
91 {
92 my ($buf, $off, $bs) = @_[0..2];
93 $buf .= chr(255) x Padlen(length($buf) + $off, $bs);
94 return $buf;
95 }
96
97 sub bcmImage
98 {
99 my ($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
144 my $kern = Read_Image $arg{k};
145 my $root = Read_Image $arg{r};
146
147 $kern = pack('NNN', $arg{a}, $arg{e}, length($kern)).$kern if $arg{t};
148
149 # specific fixup for the CFE that expects rootfs-kernel order
150 if ($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 = $dummy_root;
159 }
160
161 bcmImage($kern, $root);
162