[GIT PULL] Renesas ARM-based SoC defconfig for v3.8
arnd at arndb.de
Mon Oct 22 10:12:19 EDT 2012
(adding Nico, who did a lot of the work to get rid of PLAT_PHYS_OFFSET)
On Monday 22 October 2012, Simon Horman wrote:
> On Mon, Oct 22, 2012 at 09:33:51AM +0900, Simon Horman wrote:
> > On Fri, Oct 19, 2012 at 08:18:50AM +0000, Arnd Bergmann wrote:
> > > On Friday 19 October 2012, Simon Horman wrote:
> > > > * A more significant problem seems to be the use of CONFIG_MEMORY_START
> > > > to define PLAT_PHYS_OFFSET in arch/arm/mach-shmobile/include/mach/memory.h
> > > >
> > > > I'm not sure that I see an easy way to get around this one.
> > >
> > > ARM_PATCH_PHYS_VIRT should take care of this, have you tried it?
> I believe that this leaves mach-shmobile with three areas
> where CONFIG_MEMORY_START/PLAT_PHYS_OFFSET is used.
Hmm, I just noticed that in fact shmobile is the only remaining
platform that uses CONFIG_MEMORY_START with a per-board or per-soc
> * arch/arm/mach-shmobile/headsmp.S
> This uses PLAT_PHYS_OFFSET.
> I believe this can be replaced with a run-time calculation. Though I
> haven't thought about the details yet.
> * arch/arm/boot/compressed/head-shmobile.S
> This makes use of CONFIG_MEMORY_START.
> This is only used if CONFIG_ZBOOT_ROM is set.
> I'm unsure if this can be replaced with a run-time calculation or not.
> But regardless it is only used if CONFIG_ZBOOT_ROM is set, which is not
> the default at this time.
Right, you can probably make CONFIG_ZBOOT_ROM_MMCIF and
CONFIG_ZBOOT_ROM_SH_MOBILE_SDHI depend on !ARM_PATCH_PHYS_VIRT
> * arch/arm/mach-shmobile/Makefile.boot
> This makes use of CONFIG_MEMORY_START to set zreladdr.
> I believe that the solution to this is to make use of CONFIG_AUTO_ZRELADDR.
> However, it is not yet clear to me how that can be used in conjunction
> with a uImage. As I understand it the boot loader on many of our boards,
> including the Marzen board which is my first target for this work, boot
> uImage imagess.
If this doesn't work, we probably also need to find a solution to
build multiple uImage files from the same vmlinux when building a
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