From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757910Ab2IJMwY (ORCPT ); Mon, 10 Sep 2012 08:52:24 -0400 Received: from cam-admin0.cambridge.arm.com ([217.140.96.50]:38883 "EHLO cam-admin0.cambridge.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757849Ab2IJMwW (ORCPT ); Mon, 10 Sep 2012 08:52:22 -0400 Date: Mon, 10 Sep 2012 13:51:37 +0100 From: Catalin Marinas To: Jean-Christophe PLAGNIOL-VILLARD Cc: Nicolas Pitre , "linux-arch@vger.kernel.org" , Arnd Bergmann , "linux-kernel@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" Subject: Re: [PATCH v3 02/31] arm64: Kernel booting and initialisation Message-ID: <20120910125137.GC27042@arm.com> 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> <20120910055339.GC31430@game.jcrosoft.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20120910055339.GC31430@game.jcrosoft.org> User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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. -- Catalin