Re: CELF Project Proposal/Add Device Tree emulation support to QEMU

[David Gibson <david-xT8FGy+AXnRB3Ne2BGzF6laj5H9X9Tb+@public.gmane.org>]

On Sun, May 23, 2010 at 09:04:58PM -1000, Mitch Bradley wrote:
> Grant Likely wrote:
> >(cc'ing devicetree-discuss and others)
> >
> >On Sun, May 23, 2010 at 5:32 PM, Nigel Cunningham
> ><ncunningham-VWkGxi2CTS+6c6uEtOJ/EA@public.gmane.org> wrote:
> >>http://elinux.org/CELF_Project_Proposal/Add_Device_Tree_emulation_support_to_QEMU
> 
> Just in case anyone is interested -
> 
> One Laptop Per Child is doing some ARM work, so I have resurrected
> FirmWorks' ARM version of Open Firmware.  It's in the open source
> OFW tree at http://openfirmware.info/Open_Firmware .  There is a
> build that runs under QEMU, in the subdirectory cpu/arm/versatilepb
> .  FirmWorks' core ARM stuff is fairly solid, having been developed
> to shipping quality for Digital's "Shark" (aka DNARD) system, just
> prior to Digital's demise and the sale of StrongARM to Intel.
> 
> I'll be adding more elaborations in the near future.  One item on
> the short list is to auto-generate a flattened device tree from the
> real device tree.

That should be pretty easy to do.  In fact, this was one of the
use-cases I explicitly thought of when writing libfdt.  If you're
using libfdt (and if not, why not) and it's missing something handy
for this, I'll be happy to add it.

>  It's a pity that the dynamic device tree has to
> be projected onto a static structure, but I guess that Gresham's Law
> applies to software too.

-- 
David Gibson			| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you.  NOT _the_ _other_
				| _way_ _around_!
http://www.ozlabs.org/~dgibson