From mboxrd@z Thu Jan 1 00:00:00 1970 From: Detlev Zundel Date: Mon, 08 Mar 2010 17:02:52 +0100 Subject: [U-Boot] What is CONFIG_HAS_DATAFLASH? In-Reply-To: <4B916DBD.7050105@freescale.com> (Timur Tabi's message of "Fri, 05 Mar 2010 14:46:53 -0600") References: <20100305191744.90796E4716D@gemini.denx.de> <4B915A1F.90206@freescale.com> <20100305204301.69038E502AE@gemini.denx.de> <4B916DBD.7050105@freescale.com> Message-ID: List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de Hi Timur, > Wolfgang Denk wrote: > >>> This doesn't tell me anything. >> >> Hm... What exactly don't you understand here? > > Well, I was just wondering what the connection is between DataFlash > (which is some flash technology that I don't know much about) and the > md command. A google hit (second one for me) tells more: http://www.atmel.com/products/dataflash/default.asp "... sequential access families ideal for program code, data storage, Serial EEPROM replacement, and the next generation PC Bios Market". So it does not fit the "put address on a-bus, get contents on d-bus" model. >> Why are plain simple memory accesses not possible on your hardware? >> Which architecture / CPU is this? > > Because on this one chip I'm working on, the designers decided to mux > the LBC address lines with the video signal from the on-board display > driver. No, I'm not kidding about that. That means that when you're > using the video display, you can't access flash. Wow, I knew h/w designers are creative, but _that_ creative ;) Cheers Detlev -- I have always observed that the pretensions of all people are in exact inverse ratio to their merits; this is one of the axioms of morals. -- Joseph Lagrange -- DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: (+49)-8142-66989-40 Fax: (+49)-8142-66989-80 Email: dzu at denx.de