From mboxrd@z Thu Jan 1 00:00:00 1970 From: Albert ARIBAUD Date: Fri, 15 Feb 2013 13:38:23 +0100 Subject: [U-Boot] break command. In-Reply-To: <1360873151.47041.YahooMailNeo@web125104.mail.ne1.yahoo.com> References: <1360873151.47041.YahooMailNeo@web125104.mail.ne1.yahoo.com> Message-ID: <20130215133823.4ab72adc@lilith> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de 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 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.