From: Albert ARIBAUD <albert.u.boot@aribaud.net>
To: u-boot@lists.denx.de
Subject: [U-Boot] break command.
Date: Fri, 15 Feb 2013 13:38:23 +0100 [thread overview]
Message-ID: <20130215133823.4ab72adc@lilith> (raw)
In-Reply-To: <1360873151.47041.YahooMailNeo@web125104.mail.ne1.yahoo.com>
Hi Sean,
(can you please set your mailer to wrap lines at about 70?75
characters? Thanks in advance!)
On Thu, 14 Feb 2013 12:19:11 -0800
(PST), Sean Omalley <omalley_s@rocketmail.com> wrote:
> Is there anyway to break back into u-boot after trying to boot from linux (arm)? Similar to Open Firmwares stop-a, ctrl-break? I didn't see anything in the documentation nor poking around online. I am really hoping I missed something, or there is support that just needs to be compiled in. :)
>
> Even if it resets the cpu, or sends a signal to the jtag_reset would be fine. When the machine locks up, I don't want to have to push a button or unplug it since most of the time, I am not in the same vicinity as the machine. Leaving a serial console attached and remoting into another machine is easier and cheaper, then other alternatives. I could send a signal from a gpio to the jtag_reset (or short it), but the machine I would -want- to use doesn't have a gpio, and I don't want to spend money for multiple jtags when it seems more logical to do it through the serial console.?
As soon as U-Boot gives control to the payload (Linux or whatever)
there is no possible assumption that U-Boot remains intact in RAM, so
your only chance is indeed some hardware reset... But then the question
is not related to U-Boot any more.
> Thanks!
No problem.
Amicalement,
--
Albert.
next prev parent reply other threads:[~2013-02-15 12:38 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-14 20:19 [U-Boot] break command Sean Omalley
2013-02-15 12:38 ` Albert ARIBAUD [this message]
2013-02-15 19:00 ` Harvey Chapman
2013-02-15 19:03 ` Peter Barada
2013-02-15 19:28 ` Ira W. Snyder
2013-02-17 20:49 ` Wolfgang Denk
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