Re: device trees.

[Grant Likely <grant.likely@secretlab.ca>]

On Tue, May 12, 2009 at 8:36 PM, David Gibson
<david@gibson.dropbear.id.au> wrote:
> On Tue, May 12, 2009 at 05:10:46PM -0700, Stephen Neuendorffer wrote:
>>
>> Another possibility is to pad the DTB with a DESYNC command and the
>> correct pad frame, just in case it cannot be prevented.
>
> Um.. one thing I'm missing in this discussion of attaching the dtb to
> the bitstream: =A0I don't see how the bitstream becomes accessible to
> the kernel at runtime. =A0Unless you were exposing the dtb as part of
> the fpga programming, but I thought you explicitly weren't doing that
> because of limited bram space.
>
> I imagine this is simply due to my ignorance about FPGA techniques,
> but if someone could enlighten me...?

In this case the processor has access to the flash where the FPGA
bitstreams are stored and a set of registers in a CPLD which tells it
which bitstream was used to configure the FPGA.

g.

--=20
Grant Likely, B.Sc., P.Eng.
Secret Lab Technologies Ltd.