From: Aras Vaichas <arasv@magtech.com.au>
To: linux-kernel@vger.kernel.org
Subject: Re: mmaping an IO port device
Date: Thu, 13 Dec 2007 12:04:56 +1100 [thread overview]
Message-ID: <47608538.6030301@magtech.com.au> (raw)
In-Reply-To: <4760727E.2090906@magtech.com.au>
Aras Vaichas wrote:
> Hi,
>
> Can I implement mmap with an io port connected device on an x86 based
> CPU?
>
I'll just add one more bit of information which might effect the
situation. The CPU I am using is an Elan SC520 microcontroller.
It seems that this CPU is able remap the General Purpose ports (IO
ports) into the lower 1GB of memory space.
I will investigate.
If anyone knows anything about doing this, please speak up. This is a
legacy CPU in our product range, and I don't have much experience with it.
Aras
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next prev parent reply other threads:[~2007-12-13 1:05 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-12-12 23:45 mmaping an IO port device Aras Vaichas
2007-12-12 23:57 ` Aras Vaichas
2007-12-13 0:39 ` H. Peter Anvin
2007-12-13 1:04 ` Aras Vaichas [this message]
[not found] <fa.noVJACisdR+sMNi3JjMxD+zdqf8@ifi.uio.no>
2007-12-13 0:52 ` Robert Hancock
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