From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail-pb0-f45.google.com ([209.85.160.45]) by merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1TtG7R-000340-VC for barebox@lists.infradead.org; Thu, 10 Jan 2013 11:16:22 +0000 Received: by mail-pb0-f45.google.com with SMTP id mc8so239773pbc.18 for ; Thu, 10 Jan 2013 03:16:20 -0800 (PST) From: Yi Qingliang Date: Thu, 10 Jan 2013 19:14:28 +0000 Message-ID: <2434156.f1v0Lr0KEV@yiqingliang-pc> In-Reply-To: <201301101100.54062.jbe@pengutronix.de> References: <1974332.EjF16fPj1U@yiqingliang-pc> <1982990.BKj08KPbd8@yiqingliang-pc> <201301101100.54062.jbe@pengutronix.de> MIME-Version: 1.0 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: barebox-bounces@lists.infradead.org Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: Re: about s3c2442 To: Juergen Beisert Cc: barebox@lists.infradead.org On Thursday, January 10, 2013 11:00:53 AM Juergen Beisert wrote: > Hi Yi, > > Yi Qingliang wrote: > > On Thursday, January 10, 2013 10:14:07 AM Juergen Beisert wrote: > > > Yi Qingliang wrote: > > > > On Thursday, January 10, 2013 09:36:36 AM Juergen Beisert wrote: > > > > > Yi Qingliang wrote: > > > > > > I'm using barebox (based on mini2440) on my s3c2442 board, > > > > > > > > > > > > 1. flash barebox into nand: can't start normally, but can see > > > > > > early > > > > > > output on serial. > > > > > > 2. load it in sdram: can start normally into shell, and then I use > > > > > > it to boot kernel (also in sdram, also based on mini2440). > > > > > > the kernel hang, no output. > > > > > > > > > > > > after dig into it, I found something: add "mem=64M" into the > > > > > > kernel > > > > > > paramer, then the kernel can start. > > > > > > > > > > > > BUT: > > > > > > the barebox doesn't pass that paramert to kernel for mini2440, > > > > > > why the mini2440 kernel can start normally? > > > > > > > > > > > > how does the kernel on 2440 get the sdram size? > > > > > > > > > > There is no autodetection possible. Take a look into > > > > > the "arch/arm/boards/friendlyarm-mini2440/lowlevel_init.S": This is > > > > > the > > > > I found it, > > but: > > md 0x48000028 > > 48000028: 000000b2 (represents is 128) > > it looks like the lowlevel_init is not executed, what's the problem. > > Is the symbol "CONFIG_MACH_DO_LOWLEVEL_INIT" enabled in your config? enabled already, but when loaded in sdram, the barebox skipped the sdram init code. am i right? > > Regards, > Juergen _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox