Re: Getting Physical address of a buffer
Re: Getting Physical address of a buffer
- Subject: Re: Getting Physical address of a buffer
- From: Antoine Missout <email@hidden>
- Date: Fri, 6 Aug 2010 07:46:36 -0400
grep xnu for ml_vtophys
However, it is not exported.
- Antoine
On 2010-08-05, at 2:10 PM, shailesh jain wrote:
> 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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