Hello,
I wrote a blog post about this:
http://blogs.coreboot.org/blog/2011/04/30/u-boot-as-coreboot-payload/
I'm attaching patches so you see what I have right now. Please consider them just a "test" I did not change the copyrights etc. Maybe they are just a big mess. Maybe you find them useful.
The current problems are:
1) I have PCI resource conflicts with QEMU and coreboot
This is just now a showstopper. Definetely no time to investigate right now/
2) I have in plan to get rid of u-boot relocation by relocating it exactly 0 bytes ;)
3) I still don't know git despite F1 from Carebear ;)
Thanks, Rudolf