From mboxrd@z Thu Jan 1 00:00:00 1970 From: Harvey Chapman Date: Fri, 15 Feb 2013 14:00:10 -0500 Subject: [U-Boot] break command. In-Reply-To: <20130215133823.4ab72adc@lilith> References: <1360873151.47041.YahooMailNeo@web125104.mail.ne1.yahoo.com> <20130215133823.4ab72adc@lilith> Message-ID: <2586B402-FB69-465C-82A4-62A065C74234@3gfp.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de On Feb 15, 2013, at 7:38 AM, Albert ARIBAUD wrote: > On Thu, 14 Feb 2013 12:19:11 -0800 > (PST), Sean Omalley 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)