009.Course Description. Linux Kernel for ARM Devices
1. Understanding the Linux Kernel Architecture for ARM:
This segment introduces participants to the architecture of the Linux kernel, with a focus on adaptations and optimizations for ARM devices. It covers the kernel's modular structure, how it interfaces with hardware, and the unique aspects of ARM architecture that influence kernel configuration and performance. Participants will gain insights into the ARM-specific kernel features, including support for various ARM instruction sets and optimizations for low-power operation.
2. Configuring the Kernel for ARM Targets:
Participants will learn the step-by-step process of configuring the Linux kernel for ARM-based embedded devices. This includes understanding how to use `make menuconfig` or similar tools to select or deselect specific features and drivers that are relevant to the target ARM hardware. The importance of choosing the right configuration options to optimize the kernel for size, performance, and functionality on ARM devices will be emphasized.
3. Cross-Compiling the Linux Kernel: This section delves into the cross-compilation process of the Linux kernel for ARM devices, highlighting the use of the cross-compiling toolchain built earlier in the course. Participants will be guided through the practical aspects of compiling a kernel that can run on an ARM architecture, including setting environment variables, initiating the build process, and troubleshooting common compilation issues.
4. Booting the Linux Kernel on ARM Devices: Here, participants will explore the methods for booting the Linux kernel on ARM hardware, including transferring the kernel to the device, using bootloaders like U-boot to load the kernel into memory, and setting boot parameters. Special attention will be given to understanding the boot sequence and how kernel parameters affect the system's initialization process.
5. Hands-On Lab: From Kernel Configuration to Booting: A comprehensive lab session where participants will configure, cross-compile, and boot the Linux kernel on an ARM development board. This exercise aims to consolidate the theoretical knowledge gained by providing a practical experience of bringing up a Linux system on ARM hardware. Participants will configure the kernel, perform the cross-compilation, prepare the device for booting, and finally boot their custom Linux kernel, observing how their configuration choices impact the boot process and system performance.