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From: Sascha Hauer <s.hauer@pengutronix.de>
To: Renaud Barbier <renaud.barbier@ge.com>
Cc: barebox@lists.infradead.org
Subject: Re: Running Barebox in Barebox.
Date: Mon, 28 Nov 2011 15:59:57 +0100	[thread overview]
Message-ID: <20111128145957.GC27267@pengutronix.de> (raw)
In-Reply-To: <4ED399D0.7020302@ge.com>

Hi Renaud,

On Mon, Nov 28, 2011 at 02:25:20PM +0000, Renaud Barbier wrote:
> I have seen an example of tftp loading barebox in /dev/ram0
> and then running it with the go command.

Yes, this works on most boards.

> 
> Is that something that has been tested with the MPC5200?

This should work since

commit 1c9c937a6ac34c4d41fa70d0339f546f40b6c6d5
Author: Sascha Hauer <s.hauer@pengutronix.de>
Date:   Mon Sep 26 17:29:51 2011 +0200

    ppc mpc5200b: cleanup lowlevel startup
    
    The old startup process consisted of several CFG_LOWBOOT,
    CFG_RAMBOOT ifdeffery which I do not understand. So remove
    all this and replace it with:
    
    - put the entry point for second stage loaders to offset 0x0
      so that we can do a go /dev/ram0 to start a second barebox
    - When we come from the reset vector assume MBAR is at 0x80000000
    - When we come from the second stage entry assume that
      SPR 311 is in sync with the current MBAR address.
    - Switch MBAR to 0xf0000000 and we are done.
    
    Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Just tested on current master and this works for me.

Sascha


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      reply	other threads:[~2011-11-28 15:00 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-11-28 14:25 Renaud Barbier
2011-11-28 14:59 ` Sascha Hauer [this message]

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