Booting from u-boot

[Aditya Godbole]

Hi,

I want to get the kernel to boot from u-boot. U-boot passes device
tree information in a format derived from the openfirmware
specifications. The format is available here -
http://ozlabs.org/pipermail/linuxppc64-dev/2005-December/006994.html

I was thinking of writing an openfirmware emulator code that will map
the information given by u-boot to the format expected by the freebsd
openfirmware code. In other words, implement the 'openfirmware'
function in the kernel itself and use it.
Has anyone done this before? Any information on what functionality I
would need to provide and pointers to some conclusive documentation
would be useful.

-aditya