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From: "Nobin Mathew" <nobin.mathew@gmail.com>
To: "Manu Abraham" <abraham.manu@gmail.com>
Cc: "vraghavan3@mail.gatech.edu" <vraghavan3@mail.gatech.edu>,
	linux-kernel@vger.kernel.org
Subject: Re: Reading a physical memory location
Date: Wed, 11 Jul 2007 14:27:05 +0530	[thread overview]
Message-ID: <8d6898730707110157g7ddd7a27of0e0a02fe1afbdc4@mail.gmail.com> (raw)
In-Reply-To: <1a297b360707110150x56e8ad6cu64ab768e7d3ce6ed@mail.gmail.com>

Thanks

On 7/11/07, Manu Abraham <abraham.manu@gmail.com> wrote:
> On 7/11/07, Nobin Mathew <nobin.mathew@gmail.com> wrote:
> > See this in the documentation
> >
> > The returned virtual address is a current CPU mapping for the memory
> > address given. It is only valid to use this function on addresses that
> > have a kernel mapping
> >
> > This function does not handle bus mappings for DMA transfers. In
> > almost all conceivable cases a device driver should not be using this
> > function
> >
>
> To get a better idea, look here
> http://tldp.org/LDP/khg/HyperNews/get/devices/addrxlate.html
>

  reply	other threads:[~2007-07-11  8:57 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-07-09 19:47 vraghavan3
2007-07-09 22:39 ` Nobin Mathew
2007-07-10 18:12   ` vraghavan3
2007-07-10 22:02     ` Manu Abraham
2007-07-11  5:43       ` Nobin Mathew
2007-07-11  8:11         ` Manu Abraham
2007-07-11  8:14           ` Nobin Mathew
2007-07-11  8:50             ` Manu Abraham
2007-07-11  8:57               ` Nobin Mathew [this message]
2007-07-11 10:00               ` Clemens Koller
2007-07-24 12:48     ` Helge Hafting

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