soc/intel/xeon_sp: Add functions to store/restore uart state in smm

When CONFIG_DEBUG_SMI is enabled SMM handler performs console hardware
initialization that may interfere with OS. Here we store the state
before console initialization and restore state before SMM exit.

Tested=On not public yet system, after exiting smm, uart console can
still work well.

Signed-off-by: Tim Chu <Tim.Chu@quantatw.com>
Change-Id: Ifa5042c24f0e3217a75971d9e6067b1d1f56a484
Reviewed-on: https://review.coreboot.org/c/coreboot/+/68567
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Jonathan Zhang <jonzhang@fb.com>

0 files changed, 0 insertions, 0 deletions