Coreboot Training Course

1. Introduction to Coreboot

• Defining Coreboot and its purpose
• Comparative analysis of BIOS, UEFI, and Coreboot
• Coreboot architecture and foundational design principles
• Benefits and constraints of open-source firmware solutions
• Overview of supported platforms and hardware compatibility

2. Getting Started with Coreboot

• Configuring the development environment
• Installing essential tools and dependencies
• Navigating the Coreboot source code repository
• Understanding the build lifecycle
• Exploring documentation and community support resources

3. Navigating the Coreboot Source Tree

• Directory structure and project organization
• Key configuration files
• Board-specific implementation details
• Support for mainboards, chipsets, CPUs, and SoCs
• Configuration management using Kconfig and menuconfig

4. Configuring and Building Coreboot

• Choosing the appropriate target platform
• Configuring specific firmware options
• Selecting and setting up payloads
• Compiling a Coreboot image
• Validating build outputs
• Best practices for firmware configuration

5. Testing Coreboot with QEMU

• Basics of firmware emulation
• Executing Coreboot within QEMU
• Verifying the boot sequence
• Debugging startup anomalies
• Safely testing configuration modifications

6. Firmware Components and Boot Process

• Stages of Coreboot initialization
• ROM stage details
• RAM stage details
• Resource allocation mechanisms
• Payload loading procedures
• Overview of the boot flow
• Understanding CBFS (Coreboot File System)

7. Payloads and Bootloaders

• Concept of payloads in firmware
• SeaBIOS specifics
• U-Boot specifics
• Overview of Tianocore/EDK II
• Criteria for selecting the right payload
• Booting operating systems using Coreboot

8. Coreboot in Practice

• Coreboot integration with ChromeOS
• Applications in embedded systems
• Use cases for servers and workstations
• Security enhancements
• Performance implications
• Strategies for firmware updates

9. Troubleshooting and Debugging

• Interpreting Coreboot logs
• Debugging via serial console
• Addressing common build errors
• Resolving hardware compatibility issues
• Recovery procedures for failed firmware flashes
• Essential debugging tools and techniques

10. Hands-on Lab and Summary

• Practical construction of a Coreboot image
• Firmware testing in the QEMU environment
• Modifying basic configurations
• Analyzing boot logs
• Recap of key concepts
• Question and answer session
• Next steps and additional learning resources