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zynqmp-pmufw-builder

This is a simple script to build a PMU firmware for the Xilinx ZynqMP System-on-Chip.

It design goals are to:

  • be simple to use: just type a few commands to have a PMU firmware ready
  • be easy to understand and modify to your needs
  • have minimal dependencies: only crosstool-NG and the PMU firmware source code are needed

Usage

  1. Get the source code:

    git clone --recurse-submodules https://github.com/lucaceresoli/zynqmp-pmufw-builder.git
cd zynqmp-pmufw-builder

  2. Generate a suitable microblaze toolchain (this is normally needed only once):

    ./build.sh toolchain

    At the end a toolchain will be available in ~/x-tools/microblazeel-unknown-elf/.

  3. Build it:

    ./build.sh pmufw-build

    The PMU firmware will be called pmufw.bin in the current directory. Custom compiler clags can be passed in the CFLAGS environment variable, E.G.:

    CFLAGS="-DENABLE_EM" ./build.sh pmufw-build

Enjoy!

Hard-coded configuration object (deprecated, unsupported)

In the past, in order to boot with U-Boot SPL, you needed a tweak to embed a PMU configuration object in the PMUFW. This limitation does no longer exist since U-Boot 2019.10, so it is recommended to build the PMUFW without any tweak and let U-Boot SPL load the configuration object at runtime. More details in this blog post.

For historical reference, here is how to apply the tweak. After step 2 above, add these steps:

  1. Copy pm_cfg_obj.c with the configuration object for your design in the root directory (where build.sh is).

  2. Patch the PMUFW sources so it loads the hard-coded configuraton object from pm_cfg_obj.c:

    ./build.sh pmufw-patch