From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail-lb0-x236.google.com ([2a00:1450:4010:c04::236]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1WwlsD-0006ND-Lb for barebox@lists.infradead.org; Tue, 17 Jun 2014 05:23:58 +0000 Received: by mail-lb0-f182.google.com with SMTP id c11so1362212lbj.13 for ; Mon, 16 Jun 2014 22:23:34 -0700 (PDT) Date: Tue, 17 Jun 2014 09:35:17 +0400 From: Antony Pavlov Message-Id: <20140617093517.865365da210ba4675eb3789b@gmail.com> In-Reply-To: <20140616213513.GG15686@pengutronix.de> References: <1402931635-18830-1-git-send-email-p.zabel@pengutronix.de> <20140616210859.bc53e769b34765c933c93867@gmail.com> <20140616213513.GG15686@pengutronix.de> Mime-Version: 1.0 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: Re: [PATCH] ARM: AM335x: Beaglebone: Fix memory setup for Beaglebone black To: Sascha Hauer Cc: barebox@lists.infradead.org On Mon, 16 Jun 2014 23:35:13 +0200 Sascha Hauer wrote: > Hi Antony, > = > On Mon, Jun 16, 2014 at 09:08:59PM +0400, Antony Pavlov wrote: > > On Mon, 16 Jun 2014 17:13:54 +0200 > > Philipp Zabel wrote: > > = > > Question to Sascha. > > = > > Can we preserve the 'memory' dts record in situations like this? > > = > > Is it possible just alter dts in early init code? > > Or something else? > = > For what do you want to preserve it? barebox never uses the memory node > directly to pass it to the kernel. The barebox memory banks are > initialized from the code and from the dts. When starting Linux the > memory node is (re)populated with the barebox memory banks > = > I may misunderstand what you are trying to archieve. Imagine a family of boards. The RAM size can vary from board to board (for simplicity suppose that all over conditions are the same). Suppose I have a reliable RAM size detection routine and I want to run just the same barebox image on different boards. I want to run dts enabled Linux on all boards. How can I handle this situation correctly? Also note that on MIPS boards barebox uses no more than 256 MiB of RAM (even if a board has more than 256 MiB of RAM). It's a measure to make mips barebox simplier. I want to pass information on all available RAM to linux via dts. Can you describe reasonable barebox behaviour in this situation please? --=A0 Best regards, =A0 Antony Pavlov _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox