What is this?
A step-by-step guide that teaches you how to create a simple operating system kernel from scratch, called RPi OS. Its code is largely based on the Linux kernel, and everything targets the Raspberry Pi 3.
A step-by-step guide that teaches you how to create a simple operating system kernel from scratch, called RPi OS. Its code is largely based on the Linux kernel, and everything targets the Raspberry Pi 3.Is RPi OS a real operating system I can install and use, or a learning project?It's a learning project: RPi OS has very limited functionality and supports only Raspberry Pi 3. The goal is to understand how kernels work, not to replace a production OS.
It's a learning project: RPi OS has very limited functionality and supports only Raspberry Pi 3. The goal is to understand how kernels work, not to replace a production OS.How do I work through the guide?Lesson by lesson: each lesson has a folder in the src directory with a snapshot of the OS code at that stage, and every lesson ends with exercises. You start at Lesson 1: Kernel Initialization.
Lesson by lesson: each lesson has a folder in the src directory with a snapshot of the OS code at that stage, and every lesson ends with exercises. You start at Lesson 1: Kernel Initialization.Do I need OS development experience to follow it?No — the guide says understanding it doesn't require any specific OS development skills. The code itself is C plus ARM assembly, and the repo includes a Dockerfile for the build environment.
No — the guide says understanding it doesn't require any specific OS development skills. The code itself is C plus ARM assembly, and the repo includes a Dockerfile for the build environment.Is the guide finished, or are some lessons still missing?Lessons 1-6 are written, though the Linux half of lesson 6 is still in progress. Lessons 7-11 — signals, file systems, ELF executables, drivers, networking — are marked To be done.
Lessons 1-6 are written, though the Linux half of lesson 6 is still in progress. Lessons 7-11 — signals, file systems, ELF executables, drivers, networking — are marked To be done.Which kernel topics do the lessons cover?Kernel initialization and the startup sequence, processor initialization, interrupt handling with timers, a process scheduler with task forking, user processes and system calls, and virtual memory management.
Kernel initialization and the startup sequence, processor initialization, interrupt handling with timers, a process scheduler with task forking, user processes and system calls, and virtual memory management.How does the Linux kernel fit into each lesson?Every lesson first explains how a kernel feature is implemented in RPi OS, then demonstrates how the same functionality works in the real Linux kernel — a minimal version next to its production counterpart.
Every lesson first explains how a kernel feature is implemented in RPi OS, then demonstrates how the same functionality works in the real Linux kernel — a minimal version next to its production counterpart.What does Lesson 1 actually build?A bare-metal 'Hello, world!' — the first kernel that boots on the Pi. It walks through the project structure, the kernel build system and the startup sequence, then gives you exercises.
A bare-metal 'Hello, world!' — the first kernel that boots on the Pi. It walks through the project structure, the kernel build system and the startup sequence, then gives you exercises.Is the project still being developed?Yes — the README states the project is still under active development and invites participation through the contribution guide.
Yes — the README states the project is still under active development and invites participation through the contribution guide.What are similar projects?lytlnyblOS, rust-raspberrypi-OS-tutorials, linux, How-to-Make-a-Computer-Operating-System, flash-linux0.11-talk, linux-insides, blog_os, os-tutorial
lytlnyblOS, rust-raspberrypi-OS-tutorials, linux, How-to-Make-a-Computer-Operating-System, flash-linux0.11-talk, linux-insides, blog_os, os-tutorialWhich topics is it in?osdev, resource, learn, linux-kernel, from-scratch, arm, operating-system, kernel, systems-programming, raspberry-pi, embedded, computer-science
osdev, resource, learn, linux-kernel, from-scratch, arm, operating-system, kernel, systems-programming, raspberry-pi, embedded, computer-science