scripts: add tool for generating redboot scripts

This tool avoids generating the redboot script directly from Makefile, which
can get really complicated when adapting image/Makefile to the new IB system.

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
Signed-off-by: Jonas Gorski <jogo@openwrt.org>

SVN-Revision: 46488

scripts/redboot-script.pl

@@ -0,0 +1,111 @@
+#!/usr/bin/perl
+#
+# Script for generating redboot configs, based on brcmImage.pl
+#
+# Copyright (C) 2015 Álvaro Fernández Rojas <noltari@gmail.com>
+#
+# 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., 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
+
+EXAMPLES:
+    $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;
+}
+
+# MAIN
+gen_script();