Dear hotmail :-),

On Fri, 4 Apr 2003, hotmail wrote:

Hi, I know when I want to port u-boot to a new board,I can find a similar board in u-boot and modify it to my new board.But how I know which board is similar with my new board?e.g.POWERPC and SDRAM's pins connection.

Well, the CPU type is defined in a board's config file, eg. like this:

/* The 855T is just a stripped 860T and needs code for 860, so for now * at least define 860, 860T and 855T */ #define CONFIG_MPC860 1 #define CONFIG_MPC860T 1 #define CONFIG_MPC855T 1

As for the SDRAM (and all the other resources attached to the memory controller): this is typically the part where you have to apply your modifications. I recommend you begin by looking at a board configuration file that at least has the right CPU. Then try to understand what all the defines do (there is a lot of documentation included with u-boot). Try to relate your knowledge with other configurations - maybe you find a more suitable one on the way.

This will take a lot of time. If you're short on that resource, you can always hire a guru.

Regards, Marius

----------------------------------------------------------------------------- Marius Groeger SYSGO Real-Time Solutions AG mgroeger@sysgo.de Software Engineering Embedded and Real-Time Software www.sysgo.de Voice: +49-6136-9948-0 Am Pfaffenstein 14 www.osek.de FAX: +49-6136-9948-10 55270 Klein-Winternheim, Germany www.elinos.com