Booting kernel on Cubieboard/Mele a_1000 (Allwiner A10)

[Mariano Lescano]

Hi
We have the kernel booting using ubldr. At the point to mount the root
filesystem we get this message:

======================================================

Trying to mount root from ufs:/dev/mmcsd0s2a [rw,noatime]...
stack_capture: frame=0xdcacfa3c
stack_capture: frame=0
stack_capture: frame=0xdcacf85c
stack_capture: frame=0xc30feda4
stack_capture: frame=0
mountroot: waiting for device /dev/mmcsd0s2a ...
Mounting from ufs:/dev/mmcsd0s2a failed with error 19.
Trying to mount root from ufs:/dev/da0s2a []...
mountroot: waiting for device /dev/da0s2a ...
Mounting from ufs:/dev/da0s2a failed with error 19.

Loader variables:
  vfs.root.mountfrom=ufs:/dev/mmcsd0s2a
  vfs.root.mountfrom.options=rw,noatime

Manual root filesystem specification:
  <fstype>:<device> [options]
      Mount <device> using filesystem <fstype>
      and with the specified (optional) option list.

    eg. ufs:/dev/da0s1a
        zfs:tank
        cd9660:/dev/acd0 ro
          (which is equivalent to: mount -t cd9660 -o ro /dev/acd0 /)

  ?               List valid disk boot devices
  .               Yield 1 second (for background tasks)
  <empty line>    Abort manual input

mountroot> ?

List of GEOM managed disk devices:


mountroot>

========================================================

We can see that List of GEOM managed disk devices is empty

What could be the problem?
Any suggestions?

Thanks