QEMU m68k

QEMU for m68k supports a special ‘virt’ machine designed for emulation and virtualization purposes. This document describes how to run U-Boot under it.

The QEMU virt machine models a generic m68k virtual machine with Goldfish interfaces. It supports the Motorola 68040 CPU architecture.

Building U-Boot

Set the CROSS_COMPILE environment variable to your m68k toolchain, and run:

export CROSS_COMPILE=m68k-linux-gnu-
make qemu-m68k_defconfig
make

Running U-Boot

The minimal QEMU command line to get U-Boot up and running is:

qemu-system-m68k -M virt -cpu m68040 -nographic -kernel u-boot

Note that the -nographic option is used to redirect the console to stdio, which connects to the emulated Goldfish TTY device.

Hardware Support

The following QEMU virt peripherals are supported in U-Boot:

  • Goldfish TTY (Serial Console)

  • Goldfish RTC (Real Time Clock)