The uboot version that ships w/ the Parallella boards requires a raw bitstream
Two options:
i) In Vivado: enable "raw_bitstream" in "Bitstream settings"
or
ii) Use bootgen to extract the raw bitstream from a boot image
See:
https://github.com/parallella/oh/blob/m ... e16_z7010/
https://github.com/parallella/oh/blob/m ... uild.sh#L4
https://github.com/parallella/oh/blob/m ... it2bin.bif
// Ola