| # Copyright (c) 2011 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. |
| |
| import logging |
| |
| from autotest_lib.server.cros import vboot_constants as vboot |
| from autotest_lib.server.cros.faft.firmware_test import FirmwareTest |
| from autotest_lib.server.cros.faft.firmware_test import ConnectionError |
| |
| |
| class firmware_CorruptFwBodyB(FirmwareTest): |
| """ |
| Servo based firmware body B corruption test. |
| |
| The expected behavior is different if the firmware preamble USE_RO_NORMAL |
| flag is enabled. In the case USE_RO_NORMAL ON, the firmware corruption |
| doesn't hurt the boot results since it boots the RO path directly and does |
| not load and verify the RW firmware body. In the case USE_RO_NORMAL OFF, |
| the RW firwmare B corruption will result booting the firmware A. |
| """ |
| version = 1 |
| |
| def initialize(self, host, cmdline_args, dev_mode=False): |
| super(firmware_CorruptFwBodyB, self).initialize(host, cmdline_args) |
| self.backup_firmware() |
| self.switcher.setup_mode('dev' if dev_mode else 'normal') |
| self.setup_usbkey(usbkey=False) |
| |
| def cleanup(self): |
| try: |
| self.restore_firmware() |
| except ConnectionError: |
| logging.error("ERROR: DUT did not come up. Need to cleanup!") |
| super(firmware_CorruptFwBodyB, self).cleanup() |
| |
| def run_once(self): |
| RO_enabled = (self.faft_client.bios.get_preamble_flags('b') & |
| vboot.PREAMBLE_USE_RO_NORMAL) |
| logging.info("Corrupt firmware body B.") |
| self.check_state((self.checkers.fw_tries_checker, 'A')) |
| self.faft_client.bios.corrupt_body('b') |
| self.switcher.mode_aware_reboot() |
| |
| logging.info("Expected firmware A boot and set try_fwb flag.") |
| self.check_state((self.checkers.fw_tries_checker, 'A')) |
| self.try_fwb(1) |
| self.switcher.mode_aware_reboot() |
| |
| logging.info("If RO enabled, expected firmware B boot; otherwise, " |
| "still A boot since B is corrupted. Restore B later.") |
| if RO_enabled: |
| self.check_state((self.checkers.fw_tries_checker, 'B')) |
| else: |
| self.check_state((self.checkers.fw_tries_checker, ('A', False))) |
| self.faft_client.bios.restore_body('b') |
| self.switcher.mode_aware_reboot() |
| |
| logging.info("Final check and done.") |
| self.check_state((self.checkers.fw_tries_checker, 'A')) |
