I will go through the steps it takes to make Linux run on an Arm System-on-Chip where it previously didn't run, or only in a terribly outdated vendor fork. Sometimes you find yourself with a piece of hardware that runs Linux, but only a very outdated version of it. In such cases it can be interesting to port a modern version of Linux. I will go through the configuration and drivers you need to write in order to get Linux booting on an Arm SoC: - Early serial port debugging - Devicetree - Interrupt controller drivers - Timer interrupts - etc.