Hello Pirmin,

On Thu, Oct 01, 2020 at 01:43:12PM +0200, Duss Pirmin wrote:

Hi Genodians

I'm enabling base-hw on the IoT gateway of CompuLab [1].

I do this in a separate repository in the same way as arndale, panda etc are done in genode-world. This works well apart from some minor modifications on the imx8q_evk (for which I will create an issue as soon everything is finalized and cleaned up).

The only thing I'm struggling with is that /tool/run/boot_dir/hw isn't used. This leads to the error

unknown platform no linker address known

If I add the platform to genode/tool/run/boot_dir/hw building works. But as with the other out of tree platforms I'd like to keep the platform out of the Genode repository, for cleanness.

The repository is linked to genode/repos/... and added to REPOSITORIES in build/arm_v8a/etc/build.conf.

The problem with the linker address is already solved. You can shadow the `tool/run/boot_dir/hw` path. This is explained (partly) in release notes 20.05:

https://genode.org/documentation/release-notes/20.05#Board_support_outside_t...

You add the empty file `tool/run/boot_dir/hw` to your repository include the original version of the genode main repository in that file with the following line:

source [genode_dir]/tool/run/boot_dir/hw

Now, you can overwrite certain functions, e.g., `bootstrap_link_address` to add your physical link address, or `base_src` to denote the base library package for your board.

When building, you have to tweak your RUN_OPT variable in addition to the changes of the REPOSITORIES variable. Just replace the following lines in your `etc/build.conf`, which otherwise includes `[genode_dir]/tool/run/boot_dir/hw`:

ifdef KERNEL RUN_OPT += --include boot_dir/$(KERNEL) endif

Instead you would write:

ifdef KERNEL RUN_OPT += --include [path-to-your-repository]/tool/run/boot_dir/$(KERNEL) endif

I hope that help.

Best regards Stefan

[1] https://www.compulab.com/products/iot-gateways/iot-gate-imx8-industrial-arm-...

Best regards, Pirmin

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