postmarketOS

qemu vexpress (Qemu with vexpress soc)

This device is used to emulate an ARM Versatile Express for Cortex-A9.

Vexpress (Versatile Express) is the reference architecture from the ARM Foundation. It simulates the armv7 architecture and a lot of other hardware (like graphics hardware).

QEMU supports many other ARM architectures (see qemu-system-arm -machine help).

Contributors

• MartijnBraam
• mmaret

What works

• Compilation of kernel, system and initramfs
• It boots but only if you specify a seperate -dtb flag, it doesn't use the embedded dtb
• Storage
• Network

What does not work

• Keyboard and mouse

Starting qemu

$ ./pmbootstrap.py install
$ ./pmbootstrap.py flasher export
$ cp ~/.local/var/pmbootstrap/chroot_rootfs_qemu-vexpress/usr/share/dtb/vexpress-v2p-ca9.dtb .
$ qemu-system-arm \
    -kernel vmlinuz-postmarketos \
    -initrd initramfs-postmarketos \
    -M vexpress-a9 \
    -m 1024 \
    -sd qemu-vexpress.img \
    -append "console=ttyAMA0,38400n8 console=tty1 PMOS_NO_OUTPUT_REDIRECT" \
    -dtb vexpress-v2p-ca9.dtb

Links

• https://wiki.linaro.org/PeterMaydell/QemuVersatileExpress

Screenshot