Re: [Xen-devel] [PATCH] xen/arm: build as zImage

[Tim Deegan <tim@xxxxxxx>]

At 16:14 +0000 on 23 Nov (1353687242), Stefano Stabellini wrote:
> On Fri, 23 Nov 2012, Ian Campbell wrote:
> > If that doesn't work then this constant is actually in
> > xen/arch/arm/Makefile too and for the same reason:
> >         # XXX: VE model loads by VMA so instead of
> >         # making a proper ELF we link with LMA == VMA and adjust crudely
> >         $(OBJCOPY) --change-addresses +0x80000000 $< $@
> >         $(STRIP) $@
> > 
> > How about making this CONFIG_PHYSICAL_LOCAL_ADDR and plumbing through
> > like we do with CONFIG_DTB_FILE?

Good idea.  In fact it already exists, as CONFIG_LOAD_ADDRESS in
config/arm.mk, and should probably be used here, with a bit of $(())
magic to get the right offset.

> Yeah, I was thinking about that.
> However in this case we would want to set the default somewhere, rather
> than forcing the user to specify it.
> Also we would need to export CONFIG_PHYSICAL_LOCAL_ADDR to a generated
> header file somewhere. Do you have any suggestions on where?

We could pass it with -D when we're processing head.S, as we already do
for xen.lds.S.  (Though the XEN_PHYS_START name (un)used in xen.lds.S
should probably also be XEN_LOAD_ADDRESS).

Tim.

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