Re: Reading a physical memory location

[Manu Abraham]

On 7/11/07, Nobin Mathew <nobin.mathew@xxxxxxxxx> 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
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