Hi,
I am facing a lot of problems in trying to get the physical address(actually
bus address) from of page.
The most obvious answer, virt_to_bus(kmap(page)) seems to work for pages
that are NOT in high memory.
For pages in high memory, I have read up a lot of documentation, and mailing
list questions, but the only thing that seems to work for me is,
(page-mem_map)<<PAGE_SHIFT
Now, the mail i got this from says that this would work only when mem_map
[] starts at zero.
I am pretty confused here, this seems to be a obvious problem, why does
Linux not have a pretty macro or function that would work in all situations?
PS. please cc me in any answers, as I am not subscribed to this list.
Thanks
sumanesh
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This archive was generated by hypermail 2b29 : Wed Jul 23 2003 - 22:00:48 EST