[U-Boot] Altera Cyclone5 - U-Boot SPL looping

[Léo Serre]

Hi all!

I'm using U-Boot 2016.09.01 through Buildroot to make my De0-Nano-SoC 
(powered by Altera Cyclone5 SoCFPGA) working.

I have signed correctly the SPL and it boot but in loop, looking like it 
fails to find U-Boot (which is placed on the same partition as the SPL 
but 256K after the start point).

    U-Boot SPL 2016.09.01 (Dec 14 2016 - 12:59:24)
    drivers/ddr/altera/sequencer.c: Preparing to start memory calibration
    drivers/ddr/altera/sequencer.c: CALIBRATION PASSED
    drivers/ddr/altera/sequencer.c: Calibration complete
    Trying to boot from MMC1

    U-Boot SPL 2016.09.01 (Dec 14 2016 - 12:59:24)
    drivers/ddr/altera/sequencer.c: Preparing to start memory calibration
    drivers/ddr/altera/sequencer.c: CALIBRATION PASSED
    drivers/ddr/altera/sequencer.c: Calibration complete
    Trying to boot from MMC1

    ...

I've found no help in the user manual about the SPL, so I'm looking to 
the way to confirm that the SPL looks for the U-Boot to be at the 
address 256K, and maybe some help about that newbie case ;-)

Thanks !

Léo