From: Peter Barada <peter.barada@logicpd.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] break command.
Date: Fri, 15 Feb 2013 14:03:46 -0500 [thread overview]
Message-ID: <511E8692.6040908@logicpd.com> (raw)
In-Reply-To: <2586B402-FB69-465C-82A4-62A065C74234@3gfp.com>
On 02/15/2013 02:00 PM, Harvey Chapman wrote:
> On Feb 15, 2013, at 7:38 AM, Albert ARIBAUD <albert.u.boot@aribaud.net> wrote:
>> 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. :)
>>>
>> 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.
> On that note, does anyone know of a device that would do this? Perhaps a combination device like this:
>
> - USB interface to a pc
> - serial port for device
> - relay controllable A/C power plug (U.S.)
> - controllable gpio (for wiring to a power button, reset switch, etc)
>
>
If your board/processor has it, a watchdog can be used to force a reset
if it expires...
--
Peter Barada
peter.barada at logicpd.com
next prev parent reply other threads:[~2013-02-15 19:03 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
2013-02-15 19:00 ` Harvey Chapman
2013-02-15 19:03 ` Peter Barada [this message]
2013-02-15 19:28 ` Ira W. Snyder
2013-02-17 20:49 ` Wolfgang Denk
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