Porting ethernet driver from FREEBSD to rtems-libbsd

Sebastian Huber sebastian.huber at embedded-brains.de
Fri May 15 06:35:37 UTC 2015

You have two options.

1. You port simplebus to libbsd. I tried this before and its not done in 
one day.

2. You get rid of all simplebus dependencies in the driver and use the 
libbsd nexus support. This is normally done in a couple of minutes with 
the use some hacks to get the FDT provided parameters.

To get an idea how a driver is ported see git log and look at all 
commits containing "if_cgem" in the subject.

Please help to improve the documentation (libbsd.txt) while you work on 
this topic.

On 15/05/15 08:27, ragu nath wrote:
> Hi All,
> My name is ragunath. I am selected for Google Summer of Code 2015 with
> RTEMS. I will be working on improving Beagle BSP.
> I am in the process of porting ethernet driver for Beaglebone black
> from FreeBSD to rtems-libbsd.  I would like to know what are the
> necessary changes we need to make to add a driver. BBB is based on ARM
> Am335x SoC.
> What are the bsp specific changes we need to do (bus support api's,
> interrupt support, etc)? I understand all the devices are under nexus
> device in rtems-libbsd. In the FreeBSD code, it is under simplebus.
> What are the changes we need to do to take care of this?
> If there is any documentation available on this topic pls let me know.
> Thanks,
> Ragunath
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Sebastian Huber, embedded brains GmbH

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