How to reserve physical address space region

[Mulyadi Santosa]

On Fri, Oct 16, 2015 at 10:53 AM, sahlot arvind <asahlot at gmail.com> wrote:
> Hi,
>
> Is there an API kernel exposes to use for a driver in order to reserve
> physical address space?
> I mean I want to reserve 5GB (or more if allowed) of contiguous physical
> address space anywhere in the address range (wherever it is available..
> doesn't matter) and then I want to map that physical address range in the
> kernel to get a virtual address so that my driver can dereference that
> virtual pointer to access the mapped physical address range.
>
> Thanks in advance!
> Sahlot
>

5 GB is alot. If you are sure about it, then I guess boot_memalloc()
might be the only choice


-- 
regards,

Mulyadi Santosa
Freelance Linux trainer and consultant

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