From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andreas Schweigstill Date: Tue, 06 Jun 2006 10:10:21 +0200 Subject: [U-Boot-Users] AT91 u-boot lowlevel init Dataflash In-Reply-To: <44845F26.90504@koansoftware.com> References: <44845F26.90504@koansoftware.com> Message-ID: <4485386D.5060908@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 Dear Marco! Marco Cavallini schrieb: > Hi, > I am trying to use u-boot-1.1.4 with AT91RM9200 based board. > Using Parallel flash all works perfectly, but if I try using u-boot > stored in Dataflash i face to some problems and comparing two cases I > see that CPU clock are different. > Seems that is required a RomBoot provided by Atmel which launch u-boot. > Is it really necessary ? > Maybe I've miss an option that avoid RomBoot usage ? You can omit the RomBoot step if you are able to build an U-Boot which fits into ~12KB of the internal SRAM. RomBoot has to be adopted to your target hardware, especially for CPU clock and memory initialisation. The Atmel provided RomBoot can only be compiled with ARM ADS but there is also a GCC version available: http://www.teest.com/at91/romboot.tar.gz 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/