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#!/usr/bin/env perl
# Script for generating redboot configs, based on
# Copyright (C) 2015 Álvaro Fernández Rojas <>
# 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
# 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., 675 Mass Ave, Cambridge, MA 02139, USA.
use strict;
use Getopt::Std;
use File::stat;
my $version = "0.1";
my %arg = (
o => 'redboot.script',
s => 0x1000,
f => 0xbe430000,
a => 0x80010000,
l => 0x7c0000,
t => 20,
my $prog = $0;
$prog =~ s/^.*\///;
getopts("r:k:o:s:f:a:l:t:vh", \%arg);
die "usage: $prog ~opts~
-r <file> : input rootfs file
-k <file> : input kernel file
-o <file> : output image file, default $arg{o}
-s <size_kb> : redboot script size, default ".sprintf('%d', parse_num($arg{s}))."
-f <baseaddr> : flash base, default ".sprintf('0x%x', parse_num($arg{f}))."
-a <loadaddr> : Kernel load address, default ".sprintf('0x%x', parse_num($arg{a}))."
-l <linux_kb> : linux partition size, default ".sprintf('0x%x', parse_num($arg{l}))."
-t <timeout> : redboot script timeout, default ".sprintf('%d', parse_num($arg{t}))."
-v : be more verbose
-h : help, version $version
$prog -k kern -r rootfs
" if $arg{h} || !$arg{k} || !$arg{r};
sub parse_num
my $num = @_[0];
if (index(lc($num), lc("0x")) == 0) {
return hex($num);
} else {
return $num + 0;
sub gen_script
my $kernel_off = parse_num($arg{s});
my $kernel_addr = parse_num($arg{f});
my $kernel_len = stat($arg{k})->size;
my $rootfs_off = $kernel_off + $kernel_len;
my $rootfs_addr = $kernel_addr + $kernel_len;
my $rootfs_len = parse_num($arg{l}) - $kernel_len;
my $rootfs_size = stat($arg{r})->size;
my $load_addr = parse_num($arg{a});
my $timeout = parse_num($arg{t});
if ($arg{v}) {
printf "kernel_off: 0x%x(%u)\n", $kernel_off, $kernel_off;
printf "kernel_addr: 0x%x(%u)\n", $kernel_addr, $kernel_addr;
printf "kernel_len: 0x%x(%u)\n", $kernel_len, $kernel_len;
printf "rootfs_off: 0x%x(%u)\n", $rootfs_off, $rootfs_off;
printf "rootfs_addr: 0x%x(%u)\n", $rootfs_addr, $rootfs_addr;
printf "rootfs_len: 0x%x(%u)\n", $rootfs_len, $rootfs_len;
printf "rootfs_size: 0x%x(%u)\n", $rootfs_size, $rootfs_size;
open(FO, ">$arg{o}");
printf FO "fis init -f\n";
printf FO "\n";
printf FO "fconfig boot_script true\n";
printf FO "fconfig boot_script_data\n";
printf FO "fis load -b 0x%x -d kernel\n", $load_addr;
printf FO "exec -c \"noinitrd\" 0x%x\n", $load_addr;
printf FO "\n";
printf FO "fconfig boot_script_timeout %d\n", $timeout;
printf FO "\n";
printf FO "fis create -o 0x%x -f 0x%x -l 0x%x kernel\n", $kernel_off, $kernel_addr, $kernel_len;
printf FO "\n";
printf FO "fis create -o 0x%x -s 0x%x -f 0x%x -l 0x%x rootfs\n", $rootfs_off, $rootfs_size, $rootfs_addr, $rootfs_len;
printf FO "\n";
printf FO "reset\n";
close FO;