From: Clemens Koller <clemens.koller@anagramm•de>
To: Jose Almeida <jalmeida@sysgo•fr>
Cc: Linuxppc-embedded@ozlabs•org
Subject: Re: little endian page mapping on PQ3
Date: Fri, 24 Aug 2007 15:19:17 +0200 [thread overview]
Message-ID: <46CEDAD5.1070506@anagramm.de> (raw)
In-Reply-To: <46CE8FD5.2060609@sysgo.fr>
Hi, Jose!
Jose Almeida schrieb:
> Hi all,
>
> Looking at PQ3 documentation, it looks like there is a way to select
> on a page basis if we would like to map one particular page in BIG or
> LITTLE endian.
> This is a very nice feature when you need to exchange some data
> between a PC and a PQ3 target.
I would be interested, however cannot spend time right now to work
on that subject.
> I am wondering if someone have already tryed this PQ3 feature ?
> I guess this would require some kind of hook in the kernel ...
Just some random bits I found in the web:
http://developer.apple.com/documentation/Hardware/DeviceManagers/pci_srvcs/pci_cards_drivers/PCI_BOOK.250.html
The Interesting part is:
"Thus, the address swizzle is completely transparent to software."
So, I would just try to setup some memory mapping and turn on little endian
mode to access that area... MMMV. Just a guess.
Regards,
--
Clemens Koller
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next prev parent reply other threads:[~2007-08-24 13:19 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-08-24 7:59 little endian page mapping on PQ3 Jose Almeida
2007-08-24 13:19 ` Clemens Koller [this message]
-- strict thread matches above, loose matches on Subject: below --
2007-08-24 11:40 Joyeau Sylvain
2007-08-24 13:08 ` Jose Almeida
2007-08-24 15:49 ` David Hawkins
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