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Date:	Sun, 09 Sep 2012 19:29:24 -0400 (EDT)
From:	Nicolas Pitre <nico@...xnic.net>
To:	Jean-Christophe PLAGNIOL-VILLARD <plagnioj@...osoft.com>
Cc:	Catalin Marinas <catalin.marinas@....com>,
	linux-arch@...r.kernel.org, Arnd Bergmann <arnd@...db.de>,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v3 02/31] arm64: Kernel booting and initialisation

On Sun, 9 Sep 2012, Jean-Christophe PLAGNIOL-VILLARD wrote:

> On 17:26 Fri 07 Sep     , Catalin Marinas wrote:
> > +4. Call the kernel image
> > +------------------------
> > +
> > +Requirement: MANDATORY
> > +
> > +The decompressed kernel image contains a 32-byte header as follows:
> > +
> > +  u32 magic	= 0x14000008;	/* branch to stext, little-endian */
> > +  u32 res0	= 0;		/* reserved */
> > +  u64 text_offset;		/* Image load offset */
> > +  u64 res1	= 0;		/* reserved */
> > +  u64 res2	= 0;		/* reserved */
> we need to have a magic to known it's a arm64 kernel

You have it: it's 0x14000008 at the beginning.

> > +
> > +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?


Nicolas
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