Device Tree

[Georg Schardt]

Hi,

im searching for informations about the flatten device trees. the only 
thing i know is, that the device tree is a kind of data-structure which 
the bios or bootloader gives to the operation system.

until now, i boot linux with uboot without a device tree, but newer 
kernel wants a devicetree, i think ??
i use a virtex4 board with an integrated powerpc

how can i create the device tree file ?
how must the linux kernel be configured ?
is there a good internet page with informations ?


thanks
regards
georg