From mboxrd@z Thu Jan 1 00:00:00 1970 From: plagnioj@jcrosoft.com (Jean-Christophe PLAGNIOL-VILLARD) Date: Mon, 10 Sep 2012 07:53:39 +0200 Subject: [PATCH v3 02/31] arm64: Kernel booting and initialisation In-Reply-To: References: <1347035226-18649-1-git-send-email-catalin.marinas@arm.com> <1347035226-18649-3-git-send-email-catalin.marinas@arm.com> <20120909172046.GB31430@game.jcrosoft.org> Message-ID: <20120910055339.GC31430@game.jcrosoft.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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: > > > +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. fragile > > > > + > > > +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 Best Regards, J.