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alder_lake_bios/Intel/AlderLake/Features/Storage/UfsFeaturePkg/Readme.md

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Overview

  • Feature Name: Universal Flash Storage(UFS) platform driver
  • PI Phase(s) Supported: DXE
  • SMM Required? No

Purpose

This feature enables platform logic required to fully support boot from UFS.

Currently supported use cases:

  • Applying controller specific work arounds

High-Level Theory of Operation

Feature consists of a single driver(UfsPlatform.inf) which is responsible for installing the protocol instance of EDKII_UFS_HC_PLATFORM_PROTOCOL. The protocol is called from UFS driver and allows the platform to introduce platform-specific behavior at predefined points in UFS flows.

Modules

  • UfsPlatform.inf

Configuration

There is no build-time configuration of the feature at the moment.

Data flows

UfsPlatform driver installs the EDKII_UFS_HC_PLATFORM_PROTOCOL which is consumed by standard UFS driver.

Build flows

The UfsPlatform.inf module has to be dispatched before UFS driver starts binding with hardware. It is platform responsibility to make sure the module is correctly located in the flash memory.