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[Gedare Bloom]

On Tue, Aug 10, 2021 at 5:34 AM Kuan-Hsun Chen <c0066c at gmail.com> wrote:

> Hi Benson,
>
> Regarding Discord for RTEMS, here you go: https://discord.gg/TKhmGt8p.
>
> Best,
> Kuan-Hsun
>
> On Tue, Aug 10, 2021 at 1:21 PM Mathew Benson <mbenson at windhoverlabs.com>
> wrote:
>
>> Is there a Slack or Discord channel to discuss RTEMS?  I don't want to
>> flood everybody's inbox with emails.
>>
>>
As well, for this kind of development work (porting RTEMS), you can bring
your discussions and questions over to devel at rtems.org.


> I want to port RTEMS to the Xilinx Zynq Ultrascale+ R5.  I've taken the
>> RTEMS training, but that was a couple years ago.  I think I'll be fine once
>> I can just get through the build system and can focus on just code, but the
>> build system seems very foreign to me.  There still seems to be either
>> fragments of an old build system or just files that don't seem to serve any
>> purpose.  It would appear that "/spec/build/bsps/arm/xilinx-zynqmp" is
>> where my build set definition begins, but then what is
>> "/bsps/arm/xilinx-zynqmp/config" for?
>>
>>
We haven't quite divorced ourselves from the older autotools build system,
but new BSPs/ports (including the aarch64) are not using the old build
system at all.

The arm/xilinx-zynqmp is a BSP for only the 32-bit arm support of the Zynq
Ultrascale+ MPSOC specifically tested/used on the Ultra96. It was
contributed by Dornerworks. I guess this is a little confusing, because now
we also have bsps/aarch64/xilinx-zynqmp, which provides the 64-bit support.
At some point, we should be able to deprecate/drop the arm/xilinx-zynqmp
with the ability to configure the aarch64/xilinx-zynqmp to only run in
aarch32 mode.


> Also, everything still seems to be organized by architecture, the board.
>> How do you want the Zynq Ultrascale organized?  It has multiple
>> architectures on the same SoC.  Should it be under "arm" or "aarch64"?  Is
>> it possible to build two kernels in a single step, or should it contain an
>> entry in "arm" for the R5 and an entry in "aarch64" for the A53?
>>
>>
It will be preferred to work on the aarch64 version for the A53 processor.
The R5 as a standalone would be a BSP under arm though.


> --
>> *Mathew Benson*
>> CEO | Chief Engineer
>> Windhover Labs, LLC
>> 832-640-4018
>>
>>
>> www.windhoverlabs.com
>>
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>> http://lists.rtems.org/mailman/listinfo/users
>
>
>
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