Re: [PATCHv3] ARM:boot:device tree: Allow the device tree binary to be appended to zImage

[Tony Lindgren <tony-4v6yS6AI5VpBDgjK7y7TUQ@public.gmane.org>]

* Tony Lindgren <tony-4v6yS6AI5VpBDgjK7y7TUQ@public.gmane.org> [110504 00:20]:
> * Nicolas Pitre <nico-vtqb6HGKxmzR7s880joybQ@public.gmane.org> [110429 12:11]:
> > > 
> > > Err, no.  Moving stuff around becomes quite expensive when the cache is
> > > not on.  It's far better to work out where to place it first time around
> > > so its not in the way.
> > 
> > I don't think the DT data is that huge, but that's a point in favor of 
> > doing it in the zImage code.  We'll just need to feed the total size of 
> > the uncompressed kernel .bss section to zImage when compiling it.
> 
> One more thing to consider though.. I don't think we want to copy the
> DT data twice. It's not big right now, but could get large if we pass
> all the clocks in it.
> 
> So this should be probably fixed in the original patch.. John got
> any thoughts on that?

Hmm actually the the easy fix is to relocate both the compressed kernel
and DT data with one copy to:

max(inflated_kernel_end + kernel_bss_size - compressed_kernel_size,
	inflated_kernel_end)

So no need to relocate them separately or copy twice.

Tony