From mboxrd@z Thu Jan 1 00:00:00 1970 From: Daniel Stodden Date: Mon, 12 Nov 2012 23:01:54 -0800 Subject: [U-Boot] kwboot: Boot Marvell Kirkwood SoCs over a serial link. In-Reply-To: References: <1335075976.10449.13.camel@ramone> <20120423205627.44756200261@gemini.denx.de> Message-ID: <1352790114.12535.209.camel@ramone> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de On Sat, 2012-11-10 at 09:04 -0500, Sam Bulka wrote: > I understand the advantage of the tool when installed on a PC. But not > the advantage of adding it to Uboot, since the tool is needed when > Uboot is broken and doesn't work anymore. How would you use this tool > from within Uboot, if you can't access Uboot prompt? :) And if you can > access the prompt, then you can reflash Uboot or change its > environment without this tool. Sam, in case this didn't become clear: the receiving end to which this tool talks resides in firmware deeply embedded within the SoC. It's a function specific to Marvell processors, not u-boot, and activated by talking to the chip before any other software environment is loaded. These chips support booting from a whole variety of peripheral sources to load system images from, both SPI flash and UART are just alternatives. So it's in u-boot as part of the toolchain, not boot firmware. Daniel