I’ve not had a chance to learn OpenPOWER’s firmware yet. Luckily, Stewart Smith blogs on this topic, so we can learn from him. He just posted two new articles on OpenPOWER, the second one is useful for newbies like me, getting started with OpenPOWER. 🙂
https://www.flamingspork.com/blog/2015/08/28/doing-nothing-on-modern-cpus/
https://www.flamingspork.com/blog/2015/08/28/running-opal-in-qemu-the-powernv-platform/