The rest of this chapter assumes that the Driver Checklist in Chapter 2 has been followed and that the following items have already been identified:
UEFI Driver Type
Optional UEFI Driver features
Supported CPU architectures
Consumed protocols that are used to produce the User Credential Protocol.
UEFI drivers that produce the Load File Protocol typically follow the UEFI Driver Model.
However, it is possible to implement UEFI drivers that directly produce the Load File Protocol for a single device in a platform. In this case a Root Bridge Driver implementation may be more appropriate than a UEFI Driver Model implementation.