From: Callebaut Benoit <callebaut@mailandnews.com>
To: linuxppc-embedded@lists.linuxppc.org
Subject: What kind of Linux address must I use to set the SAR reg. of the DMA ctrl ?
Date: Wed, 7 May 2003 02:52:06 -0400 [thread overview]
Message-ID: <3EC0E6EE@mailandnews.com> (raw)
Hello,
I am writing the code to start a DMA transfer with the built-in DMA controller
of the MPC8245. The purpose is to do Memory to PCI transfers. The PCI part
seems to be OK ( memory of the device is written) the the source address seems
to be wrong since I read 0XFFFFFFFF as data in the device. I tried with bus
and physical address (using virt_to_bus & virt_to_phys functions) but this
doesn't give good results.
So I ask myself which kind of linux address must I use to configure the SAR
register of the Dual channel DMA controller ?
If It works I will post a patch of my work.
Thanks
------------------------------------------------------------------------------
----
Benoit Callebaut
Software Development Engineer
Barco | Control Rooms
Noordlaan 5, 8520 Kuurne, Belgium
Tel +32(0)56 36 84 28
Fax +32(0)56 36 86 05
mailto:benoit.callebaut@barco.com
http://www.barcocontrolrooms.com
** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
next reply other threads:[~2003-05-07 6:52 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-05-07 6:52 Callebaut Benoit [this message]
2003-05-07 7:50 ` What kind of Linux address must I use to set the SAR reg. of the DMA ctrl ? Matt Porter
-- strict thread matches above, loose matches on Subject: below --
2003-05-07 13:14 Callebaut Benoit
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=3EC0E6EE@mailandnews.com \
--to=callebaut@mailandnews.com \
--cc=linuxppc-embedded@lists.linuxppc.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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.