From: Marco Stornelli <marco.stornelli@coritel•it>
To: Kumar Gala <galak@kernel•crashing.org>
Cc: LinuxPPC-Embedded <linuxppc-embedded@ozlabs•org>
Subject: Re: MPC8641D PCI-Express problem
Date: Tue, 25 Mar 2008 14:03:50 +0100 [thread overview]
Message-ID: <47E8F836.9060603@coritel.it> (raw)
In-Reply-To: <7F2C28B9-9B87-4F46-9C57-3666BB8F7EFD@kernel.crashing.org>
Kumar Gala ha scritto:
>
> On Mar 25, 2008, at 3:02 AM, Marco Stornelli wrote:
>> Hi,
>>
>> do you remember my problem with the pci-express? I have an
>> mpc8641d_hpcn (rev. 2.0) board connected via pci-express with the
>> Xilinx ML555 evaluation board. I'm using the 2.6.24 kernel. I'm
>> observing this strange behavior:
>>
>> 1) I turn on the board and I stop the U-boot
>> 2) I load the FPGA microcode
>> 3) I start the system
>> 4) I load the driver module and I read a version register in the FPGA
>> 5) The system crashes with a "machine check exception: transfer error
>> ack signal"
>> 6) reboot
>> 7) same procedure (without load the FPGA again)
>> 8) now I can read the registers!
>>
>> If I repeat the procedure again it doesn't work anymore. I think it's
>> a problem with pci-express controller. Have you got any suggestions?
>>
>> Thanks.
>
> Where are you loading the FPGA microcode (linux, u-boot)? Also, is the
> FPGA the only device connected over PCIe?
>
> - k
>
I load the FPGA with JTAG and with a Xilinx program without a specific
linux driver or u-boot. Yes, it is the only device connected over PCIe.
\Marco
next prev parent reply other threads:[~2008-03-25 13:01 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-03-25 8:02 MPC8641D PCI-Express problem Marco Stornelli
2008-03-25 12:55 ` Kumar Gala
2008-03-25 13:03 ` Marco Stornelli [this message]
2008-03-25 21:28 ` I Need to Reset a PPC405EP PCI Bridge From a Kernel Driver Without Reboot Darcy Watkins
2008-03-27 12:52 ` MPC8641D PCI-Express problem Kumar Gala
2008-03-28 15:15 ` marco.stornelli
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