This Repository provides a U-Boot Image for ZYBO.
There are two ways
shell$ git clone git://git.denx.de/u-boot.git u-boot-2016.03-zynq-zybo
shell$ cd u-boot-2016.03-zynq-zybo
shell$ git checkout -b v2016.03-zynq-zybo refs/tags/v2016.03
shell$ patch -p0 < ../files/u-boot-2016.03-zynq-zybo.diff
shell$ git add --update
shell$ git commit -m "patch for zynq-zybo"
shell$ git tag -a v2016.03-zynq-zybo-1 -m "Release v2016.03-1 for ZYBO"
shell$ cd u-boot-2016.03-zynq-zybo
shell$ export ARCH=arm
shell$ export CROSS_COMPILE=arm-linux-gnueabihf-
shell$ make zynq_zybo_defconfig
shell$ make
shell$ cp spl/boot.bin ../boot.bin
shell$ cp u-boot.img ../u-boot.img
shell$ cp u-boot ../u-boot.elf