Linux 2.4 Kernel on Xilinx Virtex4 FX100's PPC

Linux 2.4 Kernel on Xilinx Virtex4 FX100's PPC

[Anantharaman Chetan-W16155]

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Has anyone successfully ported a Linux 2.4 Kernel on a Xilinx Virtex-4
FX series FPGA's, PPC405 processor?

 

More specifically, the FX100 FPGA?

 

Thanks,

Chetan


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Re: Linux 2.4 Kernel on Xilinx Virtex4 FX100's PPC

[Grant Likely]

On 5/31/06, Anantharaman Chetan-W16155
<Chetan.S.Anantharaman@motorola.com> wrote:
>
> Has anyone successfully ported a Linux 2.4 Kernel on a Xilinx Virtex-4 FX
> series FPGA's, PPC405 processor?

Linux on the V4-FX is well supported.  Xilinx has an app node
describing how to modify the linuxppc-2.4 tree to work on the V4-FX.
You can find out how to get the tree here:

http://www.penguinppc.org/kernel/

I've got both 2.4 & 2.6 happily running on my ML403 board here.

Cheers,
g.

-- 
Grant Likely, B.Sc. P.Eng.
Secret Lab Technologies Ltd.
grant.likely@secretlab.ca
(403) 399-0195

RE: Linux 2.4 Kernel on Xilinx Virtex4 FX100's PPC

[Anantharaman Chetan-W16155]

Was the port done on a FX100 FPGA? Also, what PVR number does the PPC405
indicate?
Thanks,
Chetan

-----Original Message-----
From: glikely@gmail.com [mailto:glikely@gmail.com] On Behalf Of Grant
Likely
Sent: Wednesday, May 31, 2006 2:35 PM
To: Anantharaman Chetan-W16155
Cc: linuxppc-embedded@ozlabs.org
Subject: Re: Linux 2.4 Kernel on Xilinx Virtex4 FX100's PPC

On 5/31/06, Anantharaman Chetan-W16155
<Chetan.S.Anantharaman@motorola.com> wrote:
>
> Has anyone successfully ported a Linux 2.4 Kernel on a Xilinx Virtex-4
FX
> series FPGA's, PPC405 processor?

Linux on the V4-FX is well supported.  Xilinx has an app node
describing how to modify the linuxppc-2.4 tree to work on the V4-FX.
You can find out how to get the tree here:

http://www.penguinppc.org/kernel/

I've got both 2.4 & 2.6 happily running on my ML403 board here.

Cheers,
g.

--=20
Grant Likely, B.Sc. P.Eng.
Secret Lab Technologies Ltd.
grant.likely@secretlab.ca
(403) 399-0195

Re: Linux 2.4 Kernel on Xilinx Virtex4 FX100's PPC

[Aidan Williams]

Anantharaman Chetan-W16155 wrote:
> Has anyone successfully ported a Linux 2.4 Kernel on a Xilinx Virtex-4 
> FX series FPGA’s, PPC405 processor?
> 

Yes, see 
http://ozlabs.org/pipermail/linuxppc-embedded/2006-April/022583.html

Note that there are silicon bugs that prevent caches being used in some 
chips.

> More specifically, the FX100 FPGA?

I don't have one of those, sorry.

- aidan

Re: Linux 2.4 Kernel on Xilinx Virtex4 FX100's PPC

[Grant Likely]

On 5/31/06, Anantharaman Chetan-W16155
<Chetan.S.Anantharaman@motorola.com> wrote:
> Was the port done on a FX100 FPGA?

No; but AFAIK, the ppc hardcore is identical for all FX parts.  The
FX100 shoudn't be a problem.

> Also, what PVR number does the PPC405 indicate?

Core#0>rd pvr
pvr: 0x20011430  536941616

RE: Linux 2.4 Kernel on Xilinx Virtex4 FX100's PPC

[Anantharaman Chetan-W16155]

Grant,=20
Can you please provide a link or perhaps point me to the app node that
Xilinx has to modify linuxppc-2.4 tree for V4-FX.
Thanks,=20
Chetan

-----Original Message-----
From: glikely@gmail.com [mailto:glikely@gmail.com] On Behalf Of Grant
Likely
Sent: Wednesday, May 31, 2006 2:35 PM
To: Anantharaman Chetan-W16155
Cc: linuxppc-embedded@ozlabs.org
Subject: Re: Linux 2.4 Kernel on Xilinx Virtex4 FX100's PPC

On 5/31/06, Anantharaman Chetan-W16155
<Chetan.S.Anantharaman@motorola.com> wrote:
>
> Has anyone successfully ported a Linux 2.4 Kernel on a Xilinx Virtex-4
FX
> series FPGA's, PPC405 processor?

Linux on the V4-FX is well supported.  Xilinx has an app node
describing how to modify the linuxppc-2.4 tree to work on the V4-FX.
You can find out how to get the tree here:

http://www.penguinppc.org/kernel/

I've got both 2.4 & 2.6 happily running on my ML403 board here.

Cheers,
g.

--=20
Grant Likely, B.Sc. P.Eng.
Secret Lab Technologies Ltd.
grant.likely@secretlab.ca
(403) 399-0195

Re: Linux 2.4 Kernel on Xilinx Virtex4 FX100's PPC

[Peter Ryser]

We have Linux up and running on the Virtex-4 FX100. The PVR for the 
PPC405 in all FX100 is 0x20011470.

- Peter


Anantharaman Chetan-W16155 wrote:

>Was the port done on a FX100 FPGA? Also, what PVR number does the PPC405
>indicate?
>Thanks,
>Chetan
>
>-----Original Message-----
>From: glikely@gmail.com [mailto:glikely@gmail.com] On Behalf Of Grant
>Likely
>Sent: Wednesday, May 31, 2006 2:35 PM
>To: Anantharaman Chetan-W16155
>Cc: linuxppc-embedded@ozlabs.org
>Subject: Re: Linux 2.4 Kernel on Xilinx Virtex4 FX100's PPC
>
>On 5/31/06, Anantharaman Chetan-W16155
><Chetan.S.Anantharaman@motorola.com> wrote:
>  
>
>>Has anyone successfully ported a Linux 2.4 Kernel on a Xilinx Virtex-4
>>    
>>
>FX
>  
>
>>series FPGA's, PPC405 processor?
>>    
>>
>
>Linux on the V4-FX is well supported.  Xilinx has an app node
>describing how to modify the linuxppc-2.4 tree to work on the V4-FX.
>You can find out how to get the tree here:
>
>http://www.penguinppc.org/kernel/
>I've got both 2.4 & 2.6 happily running on my ML403 board here.
>
>Cheers,
>g.
>
>  
>

Re: Linux 2.4 Kernel on Xilinx Virtex4 FX100's PPC

[Peter Ryser]

There are some silicon issues on the PPC405 in V4 with PVR 0x20011430=20
which are documented in Xilinx solution record 20658. All these issues=20
are fixed in silicon where the PPC405 has a PVR of 0x20011470.

Said that it's not true that the caches cannot be used in silicon with=20
PVR 0x20011430. The problem is a corner case which does not show in=20
typical designs.

- Peter


Aidan Williams wrote:

>Anantharaman Chetan-W16155 wrote:
> =20
>
>>Has anyone successfully ported a Linux 2.4 Kernel on a Xilinx Virtex-4=20
>>FX series FPGA=92s, PPC405 processor?
>>
>>   =20
>>
>
>Yes, see=20
>http://ozlabs.org/pipermail/linuxppc-embedded/2006-April/022583.html
>
>Note that there are silicon bugs that prevent caches being used in some=20
>chips.
>
> =20
>
>>More specifically, the FX100 FPGA?
>>   =20
>>
>
>I don't have one of those, sorry.
>
>- aidan
>
>_______________________________________________
>Linuxppc-embedded mailing list
>Linuxppc-embedded@ozlabs.org
>https://ozlabs.org/mailman/listinfo/linuxppc-embedded
>
>
> =20
>

Re: Linux 2.4 Kernel on Xilinx Virtex4 FX100's PPC

[Grant Likely]

On 6/1/06, Peter Ryser <peter.ryser@xilinx.com> wrote:
> There are some silicon issues on the PPC405 in V4 with PVR 0x20011430
> which are documented in Xilinx solution record 20658. All these issues
> are fixed in silicon where the PPC405 has a PVR of 0x20011470.
>
> Said that it's not true that the caches cannot be used in silicon with
> PVR 0x20011430. The problem is a corner case which does not show in
> typical designs.

If I understand correctly, the cache issue only shows up with RAM
attached to the OPB (instead of PLB).  Is that correct?

Cheers,
g.

Re: Linux 2.4 Kernel on Xilinx Virtex4 FX100's PPC

[Peter Ryser]

It's a little bit more complicated than that but your statement is 
basically correct.

- Peter


Grant Likely wrote:

> On 6/1/06, Peter Ryser <peter.ryser@xilinx.com> wrote:
>
>> There are some silicon issues on the PPC405 in V4 with PVR 0x20011430
>> which are documented in Xilinx solution record 20658. All these issues
>> are fixed in silicon where the PPC405 has a PVR of 0x20011470.
>>
>> Said that it's not true that the caches cannot be used in silicon with
>> PVR 0x20011430. The problem is a corner case which does not show in
>> typical designs.
>
>
> If I understand correctly, the cache issue only shows up with RAM
> attached to the OPB (instead of PLB).  Is that correct?
>
> Cheers,
> g.
>
>

Re: Linux 2.4 Kernel on Xilinx Virtex4 FX100's PPC

[Stephen Telfer]

I have been working on an FX60 part with PVR 0x20011430.  It has memory 
attached to the PLB.  I have noticed some possible corruptions during 
linux kernel boot that appear to follow a pattern.  If a variable is 
stored immediately before a function call is made or returns, the 
callee/caller when reading the value gets stale data.  Print the value 
of the variable in-between and coherency returns.

Does that sound like a known problem?  I went through the errata on 
solution record 20658 but nothing looked like a good fit.  So I'm 
assuming at the moment it's some stupid bug of my own...

Any suggestions gratefully appreciated.

Regards,
Stig Telfer


On 1 Jun 2006, at 19:03, Peter Ryser wrote:

> It's a little bit more complicated than that but your statement is
> basically correct.
>
> - Peter
>
>
> Grant Likely wrote:
>
>> On 6/1/06, Peter Ryser <peter.ryser@xilinx.com> wrote:
>>
>>> There are some silicon issues on the PPC405 in V4 with PVR 0x20011430
>>> which are documented in Xilinx solution record 20658. All these 
>>> issues
>>> are fixed in silicon where the PPC405 has a PVR of 0x20011470.
>>>
>>> Said that it's not true that the caches cannot be used in silicon 
>>> with
>>> PVR 0x20011430. The problem is a corner case which does not show in
>>> typical designs.
>>
>>
>> If I understand correctly, the cache issue only shows up with RAM
>> attached to the OPB (instead of PLB).  Is that correct?
>>
>> Cheers,
>> g.
>>
>>
>
>
>
> _______________________________________________
> Linuxppc-embedded mailing list
> Linuxppc-embedded@ozlabs.org
> https://ozlabs.org/mailman/listinfo/linuxppc-embedded