| #!/bin/sh |
| # Copyright 2021 The Chromium OS Authors. All rights reserved. |
| # Use of this source code is governed by a BSD-style license that can be |
| # found in the LICENSE file. |
| # |
| # Reads board id space and format it as "XXXXXXXX:XXXXXXXX:XXXXXXXX" in hex. |
| # Note that for compatibility with gsctool, the endian of respective 4 bytes are |
| # reversed. |
| |
| TPM_READSPACE="/usr/share/cros/tpm2-read-space.sh" |
| |
| if ! board_id_data="$("${TPM_READSPACE}" 013fff00 12)"; then |
| >&2 echo "Failed to read board id space" |
| exit 1 |
| fi |
| |
| reverse_endian() { |
| local v=$1 |
| echo "${v}" | tac -rs .. | tr -d '\n' |
| } |
| |
| # Extract and print RMA and SNbits data. |
| board_id_part1="$(echo "${board_id_data}" | cut -b 1-8)" |
| board_id_part2="$(echo "${board_id_data}" | cut -b 9-16)" |
| flags="$(echo "${board_id_data}" | cut -b 17-24)" |
| |
| board_id_part1="$(reverse_endian "${board_id_part1}")" |
| board_id_part2="$(reverse_endian "${board_id_part2}")" |
| flags="$(reverse_endian "${flags}")" |
| |
| echo "${board_id_part1}:${board_id_part2}:${flags}" |
