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Xilinx ZynqMP Ultrascale+
=========================
Barebox has support as a second stage boot loader for the Xilinx ZynqMP
Ultrascale+.
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
.. note:: 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.
.. _FSBL: `https://github.com/Xilinx/embeddedsw/`
.. _bootgen: `https://github.com/Xilinx/bootgen`
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.
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