Martin Stein martin.stein at ...1...
Tue Dec 17 15:06:27 CET 2013

Hi Nick,

Nice to hear that you're intending to port base-hw to A20-OLinuXino :-)
Currently there are 3 Cortex-A9 boards officially supported by base-hw:
VEA9X4, PBXA9, and the Pandaboard. You can refer to any of these boards.
Looking e.g. at PBXA9, you can see that basically the following files
must be implemented for your board:



To add support for your board in the builddir tool you should add

    @echo "SPECS = genode hw_<BOARD>" > $(BUILD_DIR)/etc/specs.conf

to tool/create_builddir and copy tool/builddir/etc/build.conf.hw_pbxa9
to tool/builddir/etc/build.conf.hw_<BOARD>.

Cortex-A9 brings its own core timer and interrupt controller, so the
only thing left is a UART driver. Either one of the drivers in
base/include/drivers/uart/ fit or you should implement your own at this
place. To install the driver afterwards you should create
base-hw/include/<UARTNAME>/drivers/serial_log.h (for instance PBXA9 uses
base-hw/include/pl011/drivers/serial_log.h) and add UARTNAME to SPECS in
your base/mk/spec-platform_<BOARD>.mk. After that Genode::printf should
print to the UART.

Assuming that the Cortex-A9 / ARMv7 revision of your board and the board
you used as reference do not differ, you should be able to run a first
scenario after this. If you have further questions do not hesitate to
ask  ;-)


On 17.12.2013 14:19, buzz heavyyear wrote:
> Hi
> I have just received a new board with a dual core cortex a7, the
> A20-OLinuXino, which I'd like to set up and add to the genode tree -
> currently more pressing than the RPi!
> I'm no Arm expert, but I'm assuming that I can take most of the
> existing arm_v7 and a9 code in base-hw and just use this for setting
> up an a20olinuxino environment and building an image?
> https://www.olimex.com/Products/OLinuXino/A20/A20-OLinuXino-MICRO-4GB/open-source-hardware
> Cheers
> Nick
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