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#!/usr/bin/perl -w
# Find CPU IDs
#
# Usage: ./$0 <DTB>
#
# Copyright (C) 2014 ARM Limited. All rights reserved.
#
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE.txt file.
use warnings;
use strict;
use FDT;
my $filename = shift;
die("No filename provided") unless defined($filename);
open (my $fh, "<:raw", $filename) or die("Unable to open file '$filename'");
my $fdt = FDT->parse($fh) or die("Unable to parse DTB");
my $root = $fdt->get_root();
my @cpus = $root->find_by_device_type('cpu');
my @ids = map {
my ($addr, $size) = $_->get_untranslated_reg(0);
sprintf("0x%x", $addr);
} @cpus;
printf("%s\n", join(',', @ids));
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