Introduce a protocol that can be exposed by a platform for devices that are not discoverable, usually because they are wired straight to the memory bus rather than to an enumerable bus like PCI or USB. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Reviewed-by: Ruiyu Ni <ruiyu.ni@intel.com> Tested-by: Marcin Wojtas <mw@semihalf.com>