Dear "Zhong Li", In message <022501cac18c$3b11e090$b135a1...@com> you wrote: > We have a strange problem running U-boot on an AT91SAM9G20 board. The board > uses single 16 bit data bus SDRAM chip. Everything works fine when using > 32MB SDRAM chip but U-boot seems to hang when putting in a 64MB SDRAM chip. > The Atmel boot strap code was modified to have the correct row and column > settings for the SDRAM chip. The hardware is verified to be working fine > with JTAG. We can also boot directly to Linux from Atmel boot strap code > with some modification. The memtester is used to verify the SDRAM working > fine after booting up Linux. So it must be some thing between the boot > strap code and U-boot that upsets the U-boot. Can anyone give a hint what > might be wrong?
We have seen this behaviour on another system, too. Unfortunately we didn't have enough time allowed to dig into this, combined with other hardware issues, so we assumed it was a hardware issue eventually. If you see the same problem again, then I guess the memory initiali- zation in the Atmel bootstrap code is incorrect / incomplete and needs to be carefully reworked. Sorry, we don't have any such hardware here, so we cannot help. 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: [email protected] "Don't worry about people stealing your ideas. If your ideas are any good, you'll have to ram them down people's throats." - Howard Aiken _______________________________________________ U-Boot mailing list [email protected] http://lists.denx.de/mailman/listinfo/u-boot
