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Index
Cover
Title Page
Copyright
Acknowledgements
Preface
Contents
Chapter 1 – Introduction
Terminology
Short History of EFI
EFI Becomes UEFI—The UEFI Forum
Platform Trust/Security
Embedded Systems: The New Challenge
How the Boot Process Differs between a Normal Boot and an Optimized/Embedded Boot
Summary
Chapter 2 – Basic UEFI Architecture
Objects Managed by UEFI-based Firmware
UEFI System Table
Handle Database
Protocols
Working with Protocols
Multiple Protocol Instances
Tag GUID
UEFI Images
Applications
OS Loader
Drivers
Events and Task Priority Levels
Summary
Chapter 3 – UEFI Driver Model
Why a Driver Model Prior to OS Booting?
Driver Initialization
Host Bus Controllers
Device Drivers
Bus Drivers
Platform Components
Hot Plug Events
Pseudo Code
Device Driver
Bus Driver that Creates All of Its Child Handles on the First Call to Start()
Bus Driver that Is Able to Create All or One of Its Child Handles on Each Call to Start():
Additional Innovations
Security
Manageability
Networking
Summary
Chapter 4 – Protocols You Should Know
EFI OS Loaders
Device Path and Image Information of the OS Loader
Accessing Files in the Device Path of the OS Loader
Finding the OS Partition
Getting the Current System Configuration
Getting the Current Memory Map
Getting Environment Variables
Transitioning to an OS Kernel
Summary
Chapter 5 – UEFI Runtime
Isn’t There Only One Kind of
How Are Runtime Services Exposed?
Time Services
Why Abstract Time?
Get Time
Set Time
Get Wakeup Time
Set Wakeup Time
Virtual Memory Services
Set Virtual Address Map
ConvertPointer
Variable Services
GetVariable
GetNextVariableName
SetVariable
Miscellaneous Services
Reset System
Get Next High Monotonic Count
UpdateCapsule
QueryCapsuleCapabilities
Summary
Chapter 6 – UEFI Console Services
Simple Text Input Protocol
Simple Text Input Ex Protocol
Simple Text Output Protocol
Remote Console Support
Console Splitter
Network Consoles
Summary
Chapter 7 – Different Types of Platforms
Summary
Chapter 8 – DXE Basics: Core, Dispatching, and Drivers
DXE Core
Hand-Off Block (HOB) List
DXE Architectural Protocols
EFI System Table
EFI Boot Services Table
EFI Runtime Services Table
DXE Services Table
Global Coherency Domain Services
GCD Memory Resources
GCD I/O Resources
DXE Dispatcher
The a priori File
Dependency Grammar
DXE Drivers
Boot Device Selection (BDS) Phase
Console Devices
Boot Devices
Boot Services Terminate
Summary
Chapter 9 – Some Common UEFI and PI Functions
Architectural Protocol Examples
CPU Architectural Protocol
Real Time Clock Architectural Protocol
Timer Architectural Protocol
Reset Architectural Protocol
Boot Device Selection Architectural Protocol
Variable Architectural Protocol
Watchdog Timer Architectural Protocol
PCI Protocols
PCI Host Bridge Resource Allocation Protocol
PCI Root Bridge I/O
PCI I/O
Block I/O
Disk I/O
Simple File System
EFI File Protocol
Configuration Infrastructure
Using the Configuration Infrastructure
Driver Model Interactions
Provisioning the Platform
Summary
Chapter 10 – Platform Security and Trust
Trust Overview
Trusted Platform Module (TPM) and Measured Boot
What Is a Trusted Building Block (TBB)?
What Is the Point of Measurements?
UEFI Secure Boot
UEFI Executable Verification
UEFI Networking
UEFI User Identification (UID)
Hardware Evolution: SRTM-to-DRTM
Platform Manufacturer
Vulnerability Classification
Roots of Trust/Guards
Summary
Chapter 11 – Boot Device Selection
Firmware Boot Manager
Related Definitions
Globally-Defined Variables
Default Behavior for Boot Option Variables
Boot Mechanisms
Boot via Simple File Protocol
Boot via LOAD_FILE Protocol
Summary
Chapter 12 – Boot Flows
Defined Boot Modes
Priority of Boot Paths
Reset Boot Paths
Intel® Itanium® Processor Reset
Non-Power-On Resets
Normal Boot Paths
Basic G0-to-S0 and S0 Variation Boot Paths
S-State Boot Paths
Recovery Paths
Discovery
General Recovery Architecture
Special Boot Path Topics
Special Boot Paths
Special Intel Itanium® Architecture Boot Paths
Intel Itanium® Architecture Access to the Boot Firmware Volume Architectural Boot Mode PPIs
Recovery
Discovery
Summary
Chapter 13 – Pre-EFI Initialization (PEI)
Scope
Rationale
Overview
Phase Prerequisites
Temporary RAM
Boot Firmware Volume
Security Primitives
Concepts
PEI Foundation
Pre-EFI Initialization Modules (PEIMs)
PEI Services
PEIM-to-PEIM Interfaces (PPIs)
Simple Heap
Hand-Off Blocks (HOBs)
Operation
Dependency Expressions
Verification/Authentication
PEIM Execution
Memory Discovery
Intel® Itanium® Processor MP Considerations
Recovery
S3 Resume
The “Terse Executable” and Cache-as-RAM
Example System
Summary
Chapter 14 – Putting It All Together–Firmware Emulation
Virtual Platform
Emulation Firmware Phases
Hardware Pass-Through
Summary
Chapter 15 – Reducing Platform Boot Times
Proof of Concept
Marketing Requirements
What Are the Design Goals?
Platform Policy
What Are the Supported OS Targets?
Do We Have to Support Legacy Operating Systems?
Do We Have to Support Legacy Option ROMs?
Are We Required to Display an OEM Splash Screen?
What Type of Boot Media Is Supported?
What Is the BIOS Recovery/Update Strategy?
When Processing Things Early
Is There a Need for Pre-OS User Interaction?
Additional Details
Adjusting the BIOS to Avoid Unnecessary Drivers
What Is the Boot Target?
Steps Taken in a Normal and Optimized Boot
Loading a Boot Target
Organizing the Flash Effectively
Minimize the Files Needed
Summary
The Primary Adjustments
Suggested Next Steps
Chapter 16 – Embedded Boot Solution
CE Device Landscape
CE Device Boot Challenges
In-Vehicle Infotainment
Other Embedded Platforms
Generic Requirements
Boot Strategies
Power Management
Boot Storage Devices
Security
Manageability
Summary
Chapter 17 – Manageability
Overall Management Framework
Dynamic In-Band
Out-of-Band
Distributed Management Task Force (DMTF)
UEFI Error Format Standardization
UEFI Error Format Overview
Error Record Types
Windows Hardware Error Architecture and the Role of UEFI
Technology Intercepts: UEFI, IPMI, Intel® AMT, WS-MAN
Intelligent Platform Management Interface (IPMI)
Intel® Active Management Technology (Intel AMT)
Web Services Management Protocol (WS-MAN)
Other Industry Initiatives
The UEFI/IPMI/Intel® AMT/WS-MAN Bridge
IPMI Error Records to UEFI
UEFI Error Records to IPMI
Intel® AMT and IPMI
Future Work
Configuration Namespace
Namespace Entries
Summary
Appendix A – Data Types
Appendix B – Status Codes
Index
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