can application find out the physical address of it's buffer ?

Hello,

I would appreciate any help regarding the following problem.

I am writing user-space application, and I need to allocate moderately
sized (few KBytes) buffer in such a way that my application knows
which physical address the allocated buffer resides at.

The related question is, how can I lock the allocated buffer in RAM
so that it will not be swapped out when my application exhaust it's
time slice and is scheduled off the CPU, and will still be at
the same physical address when my application will get back on the
CPU.

Any advice is greatly appreciated.

Thanks and regards,
Andray
.

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