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This slide deck has moved to: https://gitpitch.com/tianocore-training/UEFI_Driver_pres/master#/

UEFI & EDK II Training

How to Write a UEFI Driver

tianocore.org Note: PITCHME.md for UEFI / EDK II Training UEFI Driver Model and Driver Wizard Pres

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@title[Lesson Objective]

<p align="center"Lesson Objective

@fa[certificate gp-bullet-green] What is the UEFI Driver Model

@fa[certificate gp-bullet-cyan] Details on Driver Binding Protocol

@fa[certificate gp-bullet-yellow] Example of UEFI Driver

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UEFI Driver Model

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UEFI Drivers - Location

Note:

Boot flow diagram

UEFI Drivers depend on:
- the EFI system table
- Boot services
- runtime services

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@size[1.1em](What are UEFI Drivers ? )

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New UEFI Driver

![Newblock](/assets/images/newBlock.png)

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UEFI Drivers extend firmware
Portable across platforms
Enables rapid development
Produce Protocols

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UEFI driver is chained into a link lst of
@color[yellow](Drivers Managing Devices)

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Note: So what do UEFI Drivers do? More than anything UEFI drivers extend the firmware. They add support for new hardware without any Hardware or OS dependence. – What that means is -- The UEFI driver does not need a specific piece of hardware, a UEFI Driver will allow new hardware to exist and will manage this new hardware but does not depend on any other hardware or OS manager. In other words, a UEFI driver is chained into a link list of drivers and devices Drivers can be Portable across platform architectures IA32, X64 Enables rapid development – Enable reuse and through the driver protocols enable rapid development

UEFI and PI Drivers produce protocols. – that can be used by anything else in the UEFI System

@title[Defining a UEFI Driver?]

Defining a UEFI Driver?

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UEFI Loadable Image

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May produce/consume protocols

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Supports complex bus hierarchies

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Driver Binding Protocol matches drivers to devices, adds version management

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Supports specific hardware, can be unloaded or override an existing driver

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Note:

An UEFI Loadable Image
May produce or consume protocols
Protocols are UEFI interfaces
Supports complex bus hierarchies
Driver Binding Protocol matches drivers to devices & adds version management
Supports specific hardware, can be unloaded or override an existing driver

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UEFI Drivers - Location

Note:

UEFI Drivers extend firmware … add support for new hardware with no operating system or platform dependence
Portable across platforms … compile the same code across multiple architectures (IA32, x64, EFI Byte Code, Intel Itanium, …)

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@title[UEFI Drivers Vs. Applications]