On Wednesday 02 July 2008, Yi-Neng Lin wrote: > This arises another question. Assume that both configurations (CPU and > SDRAM) are obtained from the EEPROM, how can C program/function be adopted > to use these parameters before CPU/memory is initiated? C > programs/functions need memory space to setup the stacks, which means > CPU/memory initialization should be done (via assembly) before any C > programs/functions can be used.
All this is already taken care of. U-Boot uses a small area for initial RAM. Sometimes in D-cache, sometimes in onboard SRAM (SoC). IIRC, the 405EP has OCM, so this could be used here. You just need to configure this correctly in your board config file. Again I suggest you take a look at the zeus board as an example. Best regards, Stefan ===================================================================== DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: +49-8142-66989-0 Fax: +49-8142-66989-80 Email: [EMAIL PROTECTED] ===================================================================== ------------------------------------------------------------------------- Sponsored by: SourceForge.net Community Choice Awards: VOTE NOW! Studies have shown that voting for your favorite open source project, along with a healthy diet, reduces your potential for chronic lameness and boredom. Vote Now at http://www.sourceforge.net/community/cca08 _______________________________________________ U-Boot-Users mailing list U-Boot-Users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/u-boot-users
