From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeremy Kerr Subject: Re: RFC: ARM Boot standard for passing device tree blob Date: Fri, 26 Mar 2010 08:23:44 +0800 Message-ID: <201003260823.44829.jeremy.kerr@canonical.com> References: <20100325210409.GH24984@n2100.arm.linux.org.uk> <20100325234053.GB26649@yookeroo> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20100325234053.GB26649@yookeroo> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: devicetree-discuss-bounces+gldd-devicetree-discuss=m.gmane.org-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org Errors-To: devicetree-discuss-bounces+gldd-devicetree-discuss=m.gmane.org-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org To: David Gibson Cc: Russell King - ARM Linux , devicetree-discuss , Philippe Robin , David Rusling , Dave P Martin , linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org List-Id: devicetree@vger.kernel.org > > > ===Required System State=== > > > *Quiesce all DMA > > > *CPU register contents > > > **r0 = 0 > > > **r1 = Linux machine number (as defined in the ARM Linux machine > > > database) or 0 > > > > 0 is a valid machine number. What is your purpose of passing 0? > > Presumably a machine number will need to be allocated to mean "use the > device tree instead of fixed machine number info". I've been using 0xffffffff to indicate that this is a 'device-tree' platform. The value isn't really important, just that we agree on something. Cheers, Jeremy