Subject: [PATCH v3 02/31] arm64: Kernel booting and initialisation

From: [email-masked] (Jean-Christophe PLAGNIOL-VILLARD)
Date: Mon, 10 Sep 2012 17:21:02 +0200

On 13:51 Mon 10 Sep     , Catalin Marinas wrote:
> On Mon, Sep 10, 2012 at 06:53:39AM +0100, Jean-Christophe PLAGNIOL-VILLARD wrote:
> > On 19:29 Sun 09 Sep     , Nicolas Pitre wrote:
> > > On Sun, 9 Sep 2012, Jean-Christophe PLAGNIOL-VILLARD wrote:
> > > > On 17:26 Fri 07 Sep     , Catalin Marinas wrote:
> > > > > +The image must be placed at the specified offset (currently 0x80000)
> > > > > +from the start of the system RAM and called there. The start of the
> > > > > +system RAM must be aligned to 2MB.
> > > > can we drop this
> > > 
> > > Drop what?
> > > And why?
> > This contrain the must be loadable at any address
> 
> You can't easily load the kernel image at any address, unless it can
> relocate itself and you have a way to specify PHYS_OFFSET. We don't want
> a compile-time PHYS_OFFSET, the kernel detects it at boot time based on
> the load address.
so NACK kexec and other boot loaders require it

Best Regards,
J.