Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756437Ab2BQBz6 (ORCPT ); Thu, 16 Feb 2012 20:55:58 -0500 Received: from mail-iy0-f174.google.com ([209.85.210.174]:60229 "EHLO mail-iy0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754770Ab2BQBzz (ORCPT ); Thu, 16 Feb 2012 20:55:55 -0500 MIME-Version: 1.0 X-Originating-IP: [108.60.121.129] In-Reply-To: References: <4F1EE861.4030405@monstr.eu> <4F1FF870.3000105@monstr.eu> <4F200F64.9060203@monstr.eu> <4F212E9E.9060807@monstr.eu> <4F391C1D.9020402@monstr.eu> <4F3BA962.9040109@monstr.eu> <4F3BC30A.4030301@monstr.eu> <4F3CC899.4070302@monstr.eu> <4F3CFFAD.9030402@monstr.eu> <4F3D032B.6090700@monstr.eu> From: Ohad Ben-Cohen Date: Fri, 17 Feb 2012 02:55:33 +0100 Message-ID: Subject: Re: remoteproc: Load coprocessor code to the specific main memory location To: Michal Simek Cc: LKML , John Williams , linux-arm , "Grosen, Mark" , Arnd Bergmann , Grant Likely , devicetree-discuss@lists.ozlabs.org Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1903 Lines: 47 On Thu, Feb 16, 2012 at 9:21 PM, Michal Simek wrote: > IRC in init part Linux kick rtos which send which services are available.in > any format which is unknown to me. Check out struct rpmsg_ns_msg - that's the exact format of the name service notification messages (it's also mentioned by Documentation/rpmsg.txt). Of course, these messages, like any other message that is sent across, need to begin with the usual rpmsg header. Its format is defined by struct rpmsg_hdr. To send the message from the rtos to Linux, you then need to grab a buffer from the available ring (of the vring which is used by Linux to receive messages), fill it with the message, put it in the used ring, and kick the Linux side. > Please also correct me if I read the code wrongly. that mailbox in omap > driver is used just to say which buffer contains that message. Is it > correct? We're using the mailbox payload in order to indicate which vring has pending buffers. > I can create 15 sw signals to tell rtos which buffer contains message. You can also just use a single interrupt and then, when it is triggered, check both vrings for pending buffers. It's just another if statement and shouldn't be too much of an overhead. > Will be help if I clear my code and send it to you for review? Maybe you > will see where the problem is. I'm not sure I'll have the time to review it, but let's try to progress this way and see how it goes. Sorry I couldn't answer faster this week - I'm in ELC and was a bit away from emails. I'll soon be flying back and that will keep me away from emails again, but b/o next week I'll be online again. Thanks, Ohad. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/