Re: Getting Physical address of a buffer
Re: Getting Physical address of a buffer
- Subject: Re: Getting Physical address of a buffer
- From: Terry Lambert <email@hidden>
- Date: Fri, 6 Aug 2010 12:36:17 -0700
What Shantonu and Mike said.
-- Terry
On Aug 6, 2010, at 1:47 AM, shailesh jain wrote:
> terry ?
>
> On Thu, Aug 5, 2010 at 11:10 AM, shailesh jain
> <email@hidden> 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
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