From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andreas Schweigstill Date: Mon, 28 Apr 2008 11:51:29 +0200 Subject: [U-Boot-Users] how to make a core uboot? In-Reply-To: <3a665c760804280122k722847f4r62591478d9ba6117@mail.gmail.com> References: <3a665c760804280122k722847f4r62591478d9ba6117@mail.gmail.com> Message-ID: <48159E21.70205@schweigstill.de> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de Hello! loody mil schrieb: > I intend to make a pure uboot, without including any driver but only > basic cpu setting and uboot commands supported. But I cannot see any > config option in Makefile. If you need a really minimalistic bootloader U-Boot will not be the first choice. The smallest possible U-Boot will be around 100KByte in size and contain much more than just basic CPU initialisation. > I know I may choose any config in boards and truncate those things I > don't need at all. That's the right way if you want to use U-Boot. > But I send this mail and want to know is there already a config option > or some fast way I can meet my requirement? Nobody knows what are you requirements. If you need a really minimalistic bootloader you should take a look at some sample initialization code from the processor manufacturer. On certain platforms (e.g. Atmel AT91) even U-Boot will just be used as a second or third level bootloader. The basic CPU setup has been done before starting U-Boot. With best regards Andreas Schweigstill -- Dipl.-Phys. Andreas Schweigstill Schweigstill IT | Embedded Systems Schauenburgerstra?e 116, D-24118 Kiel, Germany Phone: (+49) 431 5606-435, Fax: (+49) 431 5606-436 Mobile: (+49) 171 6921973, Web: http://www.schweigstill.de/