ATF的接口引导大全（持续完善修订格式）

Porting Guide

Introduction

Porting Trusted Firmware-A (TF-A) to a new platform involves making some
mandatory and optional modifications for both the cold and warm boot paths.
Modifications consist of:

• Implementing a platform-specific function or variable,
• Setting up the execution context in a certain way, or
• Defining certain constants (for example #defines).

The platform-specific functions and variables are declared in
include/plat/common/platform.h. The firmware provides a default
implementation of variables and functions to fulfill the optional requirements.
These implementations are all weakly defined; they are provided to e