Re: ppc4xx_find_bridges( ) hangs kernel on Xilinx ML300 (PCI)]

Re: ppc4xx_find_bridges( ) hangs kernel on Xilinx ML300 (PCI)]

[Mike Wellington]

PCI problem solved!


-------- Original Message --------
Subject: Re: ppc4xx_find_bridges( ) hangs kernel on Xilinx ML300  (PCI)
Date: Mon, 19 Apr 2004 13:48:02 -0700
From: Peter Ryser <Peter.Ryser@xilinx.com>
Organization: Xilinx, Inc.
To: Mike Wellington <wellington@lucent.com>
CC: linuxppc-embedded@lists.linuxppc.org
References: <1b6001c417f6$229c2a70$3cc8a8c0@epro.dom>
<40842D14.9040708@lucent.com>

The PCI support that is currently included in the Linux kernel tree is
for the V2PDK based OPB -> PCI bridge. It will not work with the EDK
based OPB -> PCI bridge, i.e. you will find exactly what you see.

Please download the EDK reference design for ML300 from
http://www.xilinx.com/ise/embedded/edk_examples.htm (design #6). The
design contains the V2PDK based bridge (including the pcore therefor)
and, thus, the Linux kernel will work fine with that design.

We are currently working on moving to the EDK based bridge and the Linux
kernel tree will be patched once this work is completed.

- Peter


Mike Wellington wrote:

>
> Hi-
>   I am trying to port the Xilinx PCI code to
> an embedded linux kernel.  The code calls
> ppc4xx_find_bridges( ) during the kernel initialization
> and hangs the kernel.
>
>   I built the GPL 2.4 kernel from the Open Source
> archives and it hangs also.
>
>   Then I copied ppc405_pci.c from the GPL source
> to my kernel tree and copied  head_4xx.S from the
> GPL source to my kernel tree and it still
> hangs.
>
>   I'm starting to wonder if there is something
> wrong with the PCI support for the Xilinx OCP PCI
> core.
>
>   Does anybody have a working PCI device on a
> Xilinx Virtex-II Pro using the Xilinx-supplied
> PCI core?
>
> -mike wellington
>  wellington@lucent.com
>  anyplatform@bithead.com
>
>
>
>

** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/

PREEMPT problems

[Colin LEROY]

Hi,

This won't be really helpful, as I have no time to investigate, but I seem
to have problems with preempt (and latest main-tree BK). After a few hours
of uptime, I get hanging processes (sed, cvs (can't be network related as
the CVSROOT is local)) and gcc segfaults while compiling kernel.

Maybe it's not completely fixed yet...
--
Colin
  This message represents the official view of the voices
  in my head.


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ppc4xx_find_bridges( ) hangs kernel on Xilinx ML300 (PCI)

[Mike Wellington]

Hi-
   I am trying to port the Xilinx PCI code to
an embedded linux kernel.  The code calls
ppc4xx_find_bridges( ) during the kernel initialization
and hangs the kernel.

   I built the GPL 2.4 kernel from the Open Source
archives and it hangs also.

   Then I copied ppc405_pci.c from the GPL source
to my kernel tree and copied  head_4xx.S from the
GPL source to my kernel tree and it still
hangs.

   I'm starting to wonder if there is something
wrong with the PCI support for the Xilinx OCP PCI
core.

   Does anybody have a working PCI device on a
Xilinx Virtex-II Pro using the Xilinx-supplied
PCI core?

-mike wellington
  wellington@lucent.com
  anyplatform@bithead.com

** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/

ppc4xx_find_bridges( ) hangs kernel on Xilinx ML300 (PCI)

[Mike Wellington]

Hi-
   I am trying to port the Xilinx PCI code to
an embedded linux kernel.  The code calls
ppc4xx_find_bridges( ) during the kernel initialization
and hangs the kernel.

   I built the GPL 2.4 kernel from the Open Source
archives and it hangs also.

   Then I copied ppc405_pci.c from the GPL source
to my kernel tree and copied  head_4xx.S from the
GPL source to my kernel tree and it still
hangs.

   I'm starting to wonder if there is something
wrong with the PCI support for the Xilinx OCP PCI
core.

   Does anybody have a working PCI device on a
Xilinx Virtex-II Pro using the Xilinx-supplied
PCI core?

-mike wellington
  wellington@lucent.com
  anyplatform@bithead.com


** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/

Re: ppc4xx_find_bridges( ) hangs kernel on Xilinx ML300 (PCI)

[Peter Ryser]

The PCI support that is currently included in the Linux kernel tree is
for the V2PDK based OPB -> PCI bridge. It will not work with the EDK
based OPB -> PCI bridge, i.e. you will find exactly what you see.

Please download the EDK reference design for ML300 from
http://www.xilinx.com/ise/embedded/edk_examples.htm (design #6). The
design contains the V2PDK based bridge (including the pcore therefor)
and, thus, the Linux kernel will work fine with that design.

We are currently working on moving to the EDK based bridge and the Linux
kernel tree will be patched once this work is completed.

- Peter


Mike Wellington wrote:

>
> Hi-
>   I am trying to port the Xilinx PCI code to
> an embedded linux kernel.  The code calls
> ppc4xx_find_bridges( ) during the kernel initialization
> and hangs the kernel.
>
>   I built the GPL 2.4 kernel from the Open Source
> archives and it hangs also.
>
>   Then I copied ppc405_pci.c from the GPL source
> to my kernel tree and copied  head_4xx.S from the
> GPL source to my kernel tree and it still
> hangs.
>
>   I'm starting to wonder if there is something
> wrong with the PCI support for the Xilinx OCP PCI
> core.
>
>   Does anybody have a working PCI device on a
> Xilinx Virtex-II Pro using the Xilinx-supplied
> PCI core?
>
> -mike wellington
>  wellington@lucent.com
>  anyplatform@bithead.com
>
>
>
>


** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/

Re: ppc4xx_find_bridges( ) hangs kernel on Xilinx ML300 (PCI)

[Mike Wellington]

Awesome!  You Rock!

-mikew



Peter Ryser wrote:
> The PCI support that is currently included in the Linux kernel tree is
> for the V2PDK based OPB -> PCI bridge. It will not work with the EDK
> based OPB -> PCI bridge, i.e. you will find exactly what you see.
>
> Please download the EDK reference design for ML300 from
> http://www.xilinx.com/ise/embedded/edk_examples.htm (design #6). The
> design contains the V2PDK based bridge (including the pcore therefor)
> and, thus, the Linux kernel will work fine with that design.
>
> We are currently working on moving to the EDK based bridge and the Linux
> kernel tree will be patched once this work is completed.
>
> - Peter
>
>
> Mike Wellington wrote:
>
>>
>> Hi-
>>   I am trying to port the Xilinx PCI code to
>> an embedded linux kernel.  The code calls
>> ppc4xx_find_bridges( ) during the kernel initialization
>> and hangs the kernel.
>>
>>   I built the GPL 2.4 kernel from the Open Source
>> archives and it hangs also.
>>
>>   Then I copied ppc405_pci.c from the GPL source
>> to my kernel tree and copied  head_4xx.S from the
>> GPL source to my kernel tree and it still
>> hangs.
>>
>>   I'm starting to wonder if there is something
>> wrong with the PCI support for the Xilinx OCP PCI
>> core.
>>
>>   Does anybody have a working PCI device on a
>> Xilinx Virtex-II Pro using the Xilinx-supplied
>> PCI core?
>>
>> -mike wellington
>>  wellington@lucent.com
>>  anyplatform@bithead.com
>>
>>
>>
>>


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