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BpmpInfo
Feature Name: Support for communication with the BPMP-FW
PI Phase supported: DXE
SMM Required: No
Clock, reset, and power gates are controlled by the firmware running on the BPMP processor. In order to support changes in these a IPC method is needed. UEFI provides several drivers that support this.
The UEFI BpmpIpc driver works with the device discovery framework to find the information regarding the doorbells and shared memory used to communicate with the BPMP-FW. This driver starts early in the UEFI boot and will synchronize with the BPMP-FW to setup this communication channel. Once that is availble other services will be exposed over this to allow for system control.
If the BPMP node is not present in the device tree the BpmpIpc driver will create a dummy instance that returns success to all requests.
This driver provides communication with the BPMP-FW. It is required for any communication.
This driver provides access to I2C devices that are owned by the BPMP-FW.
This driver provides clock control APIs via the BPMP
This driver provides information regarding the communication channel for BPMP. It will also provide protocols on devices that it enumerates to abstract power gates, reset control and clocks based on the contents of the device tree that UEFI is consuming.