Sanket> No actually i don't want that for DMA it is for diffrent
Sanket> requirment. actually in our device there is a page table in
Sanket> device which have virtual to physical address translation we
Sanket> save virtual address in device and corresponding physical
Sanket> address. but we can store only upto 44 bit information of
Sanket> virtual address thats why i want that.
Sanket> Can you help me in this
There is no way to limit virtual memory to 44 bits. I don't know how
your device works, but just fyi: ia64 divides the address space into 8
equal-sized regions and user space applications tend to use at least
two regions (2 for text and 3 for data/stack). This means that even
with the smallest page size, you'll have to take virtual address bits
61-63 into account.
Hope this helps,
--david
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