From: Marc Leeman <marc.leeman@gmail.com>
To: Jayasri Sangu <JayasriS@aaesys.com>
Cc: "'linuxppc-dev@ozlabs.org'" <linuxppc-dev@ozlabs.org>
Subject: Re: [gmail] DMA Cache problem on PPC8248.
Date: Wed, 20 Aug 2008 06:55:54 +0000 [thread overview]
Message-ID: <20080820065553.GP7472@crichton.homelinux.org> (raw)
In-Reply-To: <2DE723F44CAFD24A9B6BF606813F010C0945BE21@aae-exch>
[-- Attachment #1: Type: text/plain, Size: 790 bytes --]
> We are using PPC8248 provided by freescale and the kernel 2.6.10. I believe we have cache problem.
> We are allocating DMA buffers in our driver. If we increase the DMA buffer size the board hangs/halts(when try to load more applications).
> If we reduce the DMA buffer size, then we can run all our applications.
> Is there any way I can get around this problem.
Have a look at the u-boot code for the 8245; I once submitted a patch
for such a problem on an XPC8245 (experimental MPC8245). It's still in
the code; but disabled right now.
It might be the same silicon bug.
--
greetz, marc
Yeah, yeah, yeah nothing like a bomb to sober me up, I'm fine.
Crichton - Suns and Lovers
crichton 2.6.26 #1 PREEMPT Tue Jul 29 21:17:59 CDT 2008 armv5tel GNU/Linux
[-- Attachment #2: Digital signature --]
[-- Type: application/pgp-signature, Size: 189 bytes --]
prev parent reply other threads:[~2008-08-20 7:02 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-08-19 21:53 DMA Cache problem on PPC8248 Jayasri Sangu
2008-08-20 6:55 ` Marc Leeman [this message]
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=20080820065553.GP7472@crichton.homelinux.org \
--to=marc.leeman@gmail.com \
--cc=JayasriS@aaesys.com \
--cc=linuxppc-dev@ozlabs.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
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