[fedora-arm] Booting Fedora from eMMC

Hi, I tried to get F20 booting from the internal eMMC. I did as described below, but it didn't work. The result is a bricked BBB (I assume I'll be able to restore it with the 'BBB-EMMC-flasher' image but I haven't tried yet): - I installed Fedora to an SD card, and booted from it. - From within Fedora, I created a VFAT uboot filesystem and an ext4 root filesystem on the eMMC. - I copied the contents of /boot/uboot and / to the eMMC. I copied with 'tar' and made sure permissions, labels, etc are OK. - Changed the filesystem UUIDs in /etc/fstab on the eMMC. When I boot from the eMMC, the only output on the serial console is "CCCCCCCC". I can't boot from the SD card anymore either. I gives a bunch of output, and then hangs on "Starting kernel ...". The latter problem could be something I messed up myself though, not sure it is related. Any ideas what I did wrong? Is there a recommended way to get F20 on the eMMC? Regards, Geert