(reposting) how to get DMA'able memory within 4GB on 64-bit machi

[MEHTA,HIREN]

I posted this sometime back but I guess probably it got lost.

Is there a way for a driver to ask kernel to
give DMA'able memory within 4GB ? I read about
pci_alloc_consistent(). But I could not find out
whether that guarantees the DMA'able memory to be
within 4GB or not. Is there any other kernel routine
that I should call from Driver to get such a memory ?

Regards,
-hiren
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