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From: Juergen Beisert <jbe@pengutronix.de>
To: barebox@lists.infradead.org
Subject: Re: about s3c2442
Date: Thu, 10 Jan 2013 11:00:53 +0100	[thread overview]
Message-ID: <201301101100.54062.jbe@pengutronix.de> (raw)
In-Reply-To: <1982990.BKj08KPbd8@yiqingliang-pc>

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?

Regards,
Juergen

-- 
Pengutronix e.K.                              | Juergen Beisert             |
Linux Solutions for Science and Industry      | http://www.pengutronix.de/  |

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  reply	other threads:[~2013-01-10 10:01 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-01-10 15:07 about s3c2442 Yi Qingliang
2013-01-10  8:36 ` Juergen Beisert
2013-01-10  9:08   ` Yi Qingliang
2013-01-10  9:14     ` Juergen Beisert
2013-01-10 17:45       ` Yi Qingliang
2013-01-10 10:00         ` Juergen Beisert [this message]
2013-01-10 19:14           ` Yi Qingliang
2013-01-10 11:20             ` Juergen Beisert
2013-01-10 17:54       ` Yi Qingliang

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