Chapter 4 – Protocols You Should Know
Common sense ain’t common.
—Will Rogers
This chapter describes protocols that everyone who is working with the Unified Extensible Firmware Interface (UEFI), whether creating device drivers, UEFI pre-OS applications, or platform firmware, should know. The protocols are illustrated by a few examples, beginning with the most common exercise from any programming text, namely “Hello world.” The test application listed here is the simplest possible application that can be written. It does not depend upon any UEFI Library functions, so the UEFI Library is not linked into the executable that is generated. This test application uses the SystemTable that is passed into the entry point to get access to the UEFI console ...
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