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