On Wed, Mar 3, 2010 at 12:22 AM, Wolfgang Denk wrote: > Dear Joe Culler, > > In message <67a3f13e1003020733p5459c999r1f7346fd9cd8a...@mail.gmail.com> you > wrote: >> >> Thanks for the reply. Let me explain why I do this way in details. >> I work for the system integration company, the board I have is no >> eeprom, that means I have to burn the mac address before shipping the >> product. So the following steps are what I do before shipping: >> >> 1. First, I set default CONFIG_ETHADDR(for example, 02:80:ad:20:31:e8) >> in u-boot, then use flash writer to burn the flash on each board. >> 2. I have a program for burning mac address on Linux. >> After booting linux kernel, my program can burn the mac address. >> Reboot the system if burning the mac address successfully. >> 3. Since the mac address is already stored in mtd2, for example. >> I want u-boot to detect the correct mac address I burned in mtd2 >> partition rather than the default setting 02:80:ad:20:31:e8. >> >> Is it the correct way I do or do you have any better idea? Thank you. > > As usual, TIMTOWTDI. > > The quickest approach to me seems to use the flash writer (as in > your step 1) to program first the U-Boot image (common for all > boards, without any MAC address setting), and then additionally > program a small information block that contains vital product data > like MAC address, serial number etc. [This block is usually > dynamically generated by a database query during prodution of the > board.] This second part will probably just require a few bytes which > probably will fit at a well-known address in the last (only partially > filled) block used for the U-Boot image. See for example the code in > board/tqc/tqm8xx/load_sernum_ethaddr.c > > > On theother hand, if you really want to jump through all the loops and > boot Linux to program the MAC address, you could as well use the > fw_setenv program (see tools/env/) to store the MAC address directly > in the U-Boot environment, where U-Boot will pick it up without any > special measures.
Dear Wolfgang, Thank you very much for your quick reply and ideas. I'll try to both ways you provided, thanks again!! ;-) > Best regards, > > Wolfgang Denk > > -- > DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel > HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany > Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: w...@denx.de > It became apparent that one reason why the Ice Giants were known as > the Ice Giants was because they were, well, giants. The other was > that they were made of ice. -Terry Pratchett, _Sourcery_ Best regards, Joe. _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot