From: Peter Ryser <peter.ryser@xilinx•com>
To: Clint Thomas <cthomas@soneticom•com>
Cc: linuxppc-embedded@ozlabs•org
Subject: Re: PPC405 system slow boot
Date: Mon, 28 Aug 2006 17:45:28 -0700 [thread overview]
Message-ID: <44F38E28.9020201@xilinx.com> (raw)
In-Reply-To: <3C02138692C13C4BB675FE7EA240952918E1E2@bluefin.Soneticom.local>
[-- Attachment #1: Type: text/plain, Size: 1851 bytes --]
Clint,
check the interrupt sub-system of your design. What you describe
typically happens when the PPC does not get any interrupts from the
UART. It's most likely a mismatch between your hardware and the
xparameters.h.
- Peter
Clint Thomas wrote:
> Hey guys,
>
> I've run through the loops to try and figure what could be wrong with
> this system. The board in question is modeled after the Xilinx ML300
> board. It uses a Xilinx System ACE chip to load a FPGA / Kernel image
> from compact flash. Originally, I was trying to use the CompactFlash
> as the root file system, but because of issues in either the design or
> software, this would only work if SysAce was in polled I/O mode. To
> circumvent this, I built my root filesystem into an initrd image and
> built a single ELF file with the Kernel and RFS, then strapped that to
> the FPGA bit file to make a single FPGA/Kernel/RFS SysAce file.
>
> Upon decompression, the Linux kernel boots quickly and loads all of
> the device drivers. However when it gets to the prompt, it starts
> slowing down. Output and input to and from the board becomes very very
> slow (it displays 2 characters roughly every 20 seconds). Originally I
> believed this to be the CPU still polling SystemAce, so I disabled the
> Linux System ACE drivers to remove that as a possibility, however
> after doing this, the problem still persists, even with the RFS in
> ram! Has anybody encountered a similar situation to this before, with
> possible insight towards a solution? Thank you for your time.
>
> Clinton Thomas
> cthomas@soneticom•com
>
>
>------------------------------------------------------------------------
>
>_______________________________________________
>Linuxppc-embedded mailing list
>Linuxppc-embedded@ozlabs•org
>https://ozlabs.org/mailman/listinfo/linuxppc-embedded
>
[-- Attachment #2: Type: text/html, Size: 2704 bytes --]
next prev parent reply other threads:[~2006-08-29 1:08 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-08-28 19:56 PPC405 system slow boot Clint Thomas
2006-08-29 0:45 ` Peter Ryser [this message]
2006-09-01 22:57 ` Clint Thomas
-- strict thread matches above, loose matches on Subject: below --
2006-08-30 8:20 Arvid Staub
2006-09-06 13:28 Clint Thomas
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=44F38E28.9020201@xilinx.com \
--to=peter.ryser@xilinx$(echo .)com \
--cc=cthomas@soneticom$(echo .)com \
--cc=linuxppc-embedded@ozlabs$(echo .)org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox