[PATCH 0/3] patches to allow DTB to be appended to the ARM zImage

Shawn Guo shawn.guo at freescale.com
Sun Jun 12 04:34:15 EDT 2011

On Sun, Jun 12, 2011 at 09:15:41AM +0100, Russell King - ARM Linux wrote:
> On Sun, Jun 12, 2011 at 02:06:37AM -0400, Nicolas Pitre wrote:
> > This is a resend of those patches with fixups after the latest changes
> > in mainline.
> > 
> > [PATCH 1/3] ARM: zImage: ensure it is always a multiple of 64 bits in size
> > This one is new and trivial.
> > 
> > [PATCH 2/3] ARM: zImage: Allow the appending of a device tree binary
> > Mostly John Bonesio's version with some adjustments and cleanups.
> > 
> > [PATCH 3/3] ARM: zImage: make sure appended DTB doesn't get overwritten by kernel .bss
> > New, simpler alternative to Tony Lindgren's version.
> One thing which has been bugging me for some time is that the DT stuff
> completely overrides the ATAGs.  This is wrong with solutions like this.
> We have a set of perfectly good boot loaders which provide correct
> information to the kernel via ATAGs.  If we start moving everything
> over to DT, then we run into a problem because the ATAGs are ignored -
> stuff such as the RAM size and command line passed from the boot loader
> will be entirely ignored, instead these having to be encoded into the
> kernel at build time.
What u-boot does right now is replacing the parameters in dtb with
its for those it's interested in, for example command line is one,
before it passes dtb to kernel.


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