Getting Physical address of a buffer
Getting Physical address of a buffer
- Subject: Getting Physical address of a buffer
- From: shailesh jain <email@hidden>
- Date: Thu, 5 Aug 2010 11:10:56 -0700
Hello again!
I have a kernel extension (which is not an IOKit driver) that uses
OSMalloc_ KPI to allocate buffer. I pass in OSMT_DEFAULT so that
buffers that it returns are wired to memory. I have a use case where
in I would like
to get physical address of the first byte of the buffer. I understand
that buffer will not be contiguous in Physical memory and I am fine
with that. Do we have such an interface ---
something like: physAddr = virt_to_phys(buffer); // Gives physical
address of first byte of the buffer
--
Shailesh Jain
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