| #!/usr/bin/perl -w |
| # Find the start of physical memory |
| # |
| # 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(); |
| |
| # We assume the memory nodes and their reg entries are ordered by address. |
| my @mems = $root->find_by_device_type("memory"); |
| my $mem = shift @mems; |
| die("Unable to find memory") unless defined($mem); |
| |
| my ($addr, $size) = $mem->get_translated_reg(0); |
| die("Cannot find first memory bank") unless (defined($addr) && defined($size)); |
| |
| printf("0x%016x\n", $addr); |
