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

[Nicolas Pitre]

On Wed, 27 Apr 2011, Tony Lindgren wrote:

> * Tony Lindgren <tony at atomide.com> [110421 05:44]:
> > * Tony Lindgren <tony at atomide.com> [110421 11:00]:
> > > * Shawn Guo <shawn.guo at freescale.com> [110420 00:27]:
> > > > On Wed, Apr 20, 2011 at 01:47:47PM +0800, Shawn Guo wrote:
> > > > > I would like to confirm it fixes your setup before I send fixing
> > > > > patch to remove 'static' from global variables in all platform
> > > > > uncompress.h.
> > > > > 
> > > > Just saw Nico's patch, so ignore above lines ...
> > > 
> > > Thanks looks like removing static only changes things so now
> > > "Warning: Neither atags nor dtb found" error message printed out.
> > 
> > But also Nico's patch fixes the corruption of the DT data during
> > uncompress, so I'm getting much further now.
> > 
> > Now the problem is that the DT data is zeroed out by the time code
> > gets to setup_machine_fdt. I wonder if I'm missing some patch?
> > 
> > I'm using grant's devicetree/arm branch + DT append patch + Nico's
> > static fix + my relocate fix.
> > 
> > Oh well have to look at it again next week..
> 
> I guess the issue is that when setup_machine_fdt gets called we only
> have minimal MMU mapping done.

In head.S (the final kernel image one) there is a 1MB mapping 
established when r2 contains a valid ATAG/DTB pointer.  See commit 
4d901c42 (you even ACK'd it).


Nicolas