This project is for studying how to develop an operating system running on ARM architecture.

- Supported boards

• RaspberryPI4
• Realview-PB-A8 (tested only on qemu emulator)

- Supported peripherals

• PL011
• GIC-400
• SP804

Prerequisite

- Install toolchain

• Use the apt package manager (Linux only)

  • aarch32 (for Realview-PB-A8)

    This method of installing the toolchain does not include GDB for this architecture.

    sudo apt install gcc-arm-none-eabi

  • aarch64 (for RaspberryPI4)

    sudo apt install crossbuild-essential-arm64

• Download from official arm toolchain (recommend)

  You can download the toolchain from the official ARM website, and you need to make sure it supports AArch64 and AArch32.

  Download : https://developer.arm.com/downloads/-/arm-gnu-toolchain-downloads

Building

• Set the variable in makefile

  • TARGET_BOARD

    Set the board you want to install this OS.

    Make sure to set TARGET_BORD to one of the supported boards.

  • TOOLCHAIN_PREFIX

    It may change depending on how the toolchain is installed. Therefore, you must check the toolchain prefix.

• Build the BaremetalOS

  Make sure to run the command below from the top directory of the project.

Result files

The result files will be created in the build directory after the build.

• build/kernel.elf
• build/output/image