4.33. Xilinx ZynqMP Ultrascale+

Barebox has support as a second stage boot loader for the Xilinx ZynqMP Ultrascale+.

4.33.1. Image creation

Currently, Barebox only supports booting as a second stage boot loader from an SD-card. It relies on the FSBL to initialize the base system including sdram setup and pin muxing.

The ZynqMP defconfig supports the ZCU104 reference board. Use it to build the Barebox image:

make ARCH=arm64 zynqmp_defconfig
make ARCH=arm64


The resulting image images/barebox-zynqmp-zcu104.img is not an image that can directly be booted on the ZynqMP.

For a bootable BOOT.BIN image, you also need to build the FSBL and a ZynqMP TF-A. Prepare these separately using the respective instructions.

Use bootgen or mkimage -T zynqmpbif from the U-boot tools to build the final BOOT.BIN image that can be loaded by the ROM code. Check the instructions for these tools how to prepare the BOOT.BIN image.

Create a FAT partition as the first partition of the SD card and copy the produced BOOT.BIN into this partition.

4.33.2. Booting Barebox

The FSBL loads the TF-A and Barebox, jumps to the TF-A, which will then return to Barebox. Afterwards, you can use Barebox as usual.