babbleberry/rpi4-osdev
Rpi4 Osdev
rpi4-osdev is a project for bare metal operating system development targeting the Raspberry Pi 4. It focuses on creating a custom operating system that runs directly on the hardware without an underlying kernel or abstraction layer.
The project provides a codebase and instructional guide for developing a low-level system from scratch. This process involves transitioning from early boot code to kernel execution on the ARM64 architecture.
The technical scope covers embedded system bootstrapping and low-level hardware interfacing. This includes managing memory-mapped I/O, physical address mapping, and direct hardware initialization of the system on chip clock and power settings.
The environment utilizes a cross-compilation toolchain to target the device hardware and employs ARM64 assembly for initial CPU and memory controller bootstrapping.
Features
- Bare Metal Development - Provides a codebase and guide for developing an operating system that executes directly on hardware.
- Register Management - Controls physical hardware components directly by managing memory and processor registers.
- ARM64 Bootloaders - Implements low-level firmware to initialize ARM64 hardware and load the operating system kernel.
- Bare-Metal Runtimes - Provides a specialized execution environment that runs code directly on hardware without an underlying operating system.
- Bare Metal Kernels - Implements a low-level kernel foundation that interfaces directly with physical hardware components.
- Embedded Device Bootstrapping - Implements the full sequence of initializing hardware and transitioning to a functional system kernel.
- Hardware Initializations - Configures the SoC clock and power settings during the early boot phase to stabilize the platform for the kernel.
- Physical Address Mapping - Manages the translation between virtual memory and the actual physical RAM addresses of the hardware.
- Memory-Mapped I/O - Implements hardware interfacing by reading and writing to specific physical memory addresses for device registers.
- Raspberry Pi Systems Programming - Implements low-level systems programming and driver development specifically for the Raspberry Pi 4 architecture.
- Cross-Compilation Toolchains - Utilizes a build environment capable of generating executable binaries for ARM64 hardware from a host machine.
- Bare Metal Deployment Environments - Provides the necessary environment to initialize hardware and execute code directly on the processor.
- Single Board Computing - OS development resources for Raspberry Pi 4.
