tree 3263fbdddca82036b0771f69cec80b613d91f664
parent 2e1f7644295c8947f147f7cbbb1de6fbe83f94ae
author Tim Wawrzynczak <twawrzynczak@chromium.org> 1594249532 -0600
committer Patrick Georgi <pgeorgi@google.com> 1594582410 +0000

soc/intel/tigerlake: Move tco_configure to bootblock

On ChromeOS systems with a serial-enabled BIOS and vboot writing a new
firmware image to the Chrome EC, it was possible for the TCO watchdog
timer to trip 2 times before tco_configure() was called in romstage.
This caused an extra reboot of the system (at a rather inopportune time)
and because the EC didn't perform a full reset, the system boots into
recovery mode.

This patch moves the call to tco_configure() for Tiger Lake from
romstage to bootblock, in order to make sure the TCO watchdog timer is
halted before vboot_sync_ec() runs in romstage. It should be harmless to
configure the TCO device earlier in the boot flow.

BUG=b:160272400
TEST=boot Volteer (to a non-recovery kernel!) with a freshly imaged EC

Signed-off-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Change-Id: Iefdc2c861ab8b5fde7f736c04149be7de7b3ae0c
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43313
Reviewed-by: Daisuke Nojiri <dnojiri@chromium.org>
Reviewed-by: Caveh Jalali <caveh@chromium.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Nick Vaccaro <nvaccaro@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>