soc/amd/picasso: Add generic SMU service request

Add a new feature that allows messages to be sent to the SMU.  The
offsets of the PCI config index/data indirect registers have been
documented for prior generation devices.

The index/data pair is used to access a command register, a response,
and six argument values.

BUG=b:153264473
TEST=Verify service can be used to take the system into S3

Change-Id: Ide431aa976cb2f8bdc248cb08aa0724a9596ac5a
Signed-off-by: Marshall Dawson <marshalldawson3rd@gmail.com>
Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-on: https://chromium-review.googlesource.com/2161796
Reviewed-by: Furquan Shaikh <furquan@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/41625
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Raul Rangel <rrangel@chromium.org>

0 files changed, 0 insertions, 0 deletions