| #!/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)); |
