Few questions about Xlinix FPGA boards.

[Aleksei Lukin]

Hello, openrisc gurus!

I played a little bit with or1k tools on ubuntu and with Xilinx Spartan 3E starter board and decided to use or1k as base of my SoC
development because it is the best free solution available.

I plan to buy newer Spattan development board to develop my SoC on. I guess that 200$ Spartan 3A starter kit with 700K chip will be small
enough for development purposes and going to buy 600$ Spartan 3A embedded developer board with 1800K chip.

Is anyone tried to implement SoC on those boards? What is your impression? How good it runs? What CPU and bus clock? Which DDR
controller? and so on...I have too much questions for one message :)

Please, point me to additional information abour or1k SoC on Xlinx boards.

May be it is stupid solution  and I must buy other board? I need about 250K for my own SoC parts and enough memory to run Linux and a
bunch of user-space code.

--
SY, Alex Lukin
RIPE NIC HDL: LEXA1-RIPE
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[Jeremy Bennett-4]

On Sat, 2009-03-07 at 19:48 +0200, Aleksei Lukin wrote:

> I played a little bit with or1k tools on ubuntu and with Xilinx
> Spartan 3E starter board and decided to use or1k as base of my SoC
> development because it is the best free solution available.
>
> I plan to buy newer Spattan development board to develop my SoC on. I
> guess that 200$ Spartan 3A starter kit with 700K chip will be small
> enough for development purposes and going to buy 600$ Spartan 3A
> embedded developer board with 1800K chip.
>
> Is anyone tried to implement SoC on those boards? What is your
> impression? How good it runs? What CPU and bus clock? Which DDR
> controller? and so on...I have too much questions for one message :)
>
> Please, point me to additional information abour or1k SoC on Xlinx
> boards.
>
> May be it is stupid solution  and I must buy other board? I need about
> 250K for my own SoC parts and enough memory to run Linux and a
> bunch of user-space code.
>

Hi Alex,

Have you looked at the papers from the De Nayer Instituut of the
Hogeschool voor Wetenschap & Kunst. Links to them can be found in the
Documentation section of the OR1200 page on OpenCores:

        http://www.opencores.org/projects.cgi/web/or1k/openrisc_1200

They are a little out of date, but should give you some information to
get you started.

The ORPSoC (OpenRISC Reference Platform SoC) page also has information
about various projects running the full ORPSoC on FPGA (including the
XSV800):

        http://www.opencores.org/projects.cgi/web/or1k/orpsoc

Take a look at the Or1ksim (architectural simulator) configuration for
Linux. That will tell you how much space is needed for Flash, RAM and
cache.

If you manage to get OR1K running on your board, an updated paper on how
you did it would be much appreciated. We'll be happy to put it up on the
website.

HTH,


Jeremy

--
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[Florian Fainelli-5]

Hi Aleksei,

Le Saturday 07 March 2009 18:48:32 Aleksei Lukin, vous avez écrit :

> Hello, openrisc gurus!
>
> I played a little bit with or1k tools on ubuntu and with Xilinx Spartan 3E
> starter board and decided to use or1k as base of my SoC development because
> it is the best free solution available.
>
> I plan to buy newer Spattan development board to develop my SoC on. I guess
> that 200$ Spartan 3A starter kit with 700K chip will be small enough for
> development purposes and going to buy 600$ Spartan 3A embedded developer
> board with 1800K chip.

The Spartan 3A 1800K has more block RAM as well which can be useful if you
plan on playing with caches for instance. OpenRISC can be quite big if you
enable all features ;)

>
> Is anyone tried to implement SoC on those boards? What is your impression?
> How good it runs? What CPU and bus clock? Which DDR controller? and so
> on...I have too much questions for one message :)

We have been using or1k on a XC3S1200E running at 10Mhz for testings but it
could run faster. We do not have DDR on our board but SDRAM, using our own
controller.

>
> Please, point me to additional information abour or1k SoC on Xlinx boards.
>
> May be it is stupid solution  and I must buy other board? I need about 250K
> for my own SoC parts and enough memory to run Linux and a bunch of
> user-space code.

You might run out of space quickly with a S3ESK, but if you disable some or1k
features you might be able to make it fit with your SoC parts as well.
--
Cordialement, Florian Fainelli

OpenPattern SARL - Lead software architect
GSM: +33.632843955
109/111 rue des Côtes
78 600 Maisons-Laffitte
France
------------------------------


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