From mboxrd@z Thu Jan 1 00:00:00 1970 Message-Id: <200003232005.VAA05535@denx.local.net> To: christof cc: linuxppc-embedded@lists.linuxppc.org Subject: Re: kernel executing from flash From: Wolfgang Denk Mime-version: 1.0 Content-type: text/plain; charset=ISO-8859-1 In-reply-to: Your message of "Thu, 23 Mar 2000 16:14:30 +0100." <1314024740.953824470340.JavaMail.wwwrun@moe.freenet.de> Date: Thu, 23 Mar 2000 21:05:40 +0100 Sender: owner-linuxppc-embedded@lists.linuxppc.org List-Id: In message <1314024740.953824470340.JavaMail.wwwrun@moe.freenet.de> you wrote: > > all Linux I know will be copied during startup from Harddisk, NFS or Flash to RAM and will be executed there. > Is there a possibility for smaller systems to run the > kernel directly from flash memory as other embedded os's do? Did somebody try this or is it totaly impossible? It may be possible, but usually it does not make much sense - to run the kernel directly from FLASH you must store an uncompressed kernel image there, so you need more FLASH. Given the price difference between FLASH and DRAM memory is often cheaper to uncompress into RAM, and run from RAM. Wolfgang Denk -- Software Engineering: Embedded and Realtime Systems, Embedded Linux Phone: (+49)-8142-4596-87 Fax: (+49)-8142-4596-88 Email: wd@denx.de The only person who always got his work done by Friday was Robinson Crusoe. ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/