Dear Sergey Lapin, In message <20111213160810.ga27...@build.ihdev.net> you wrote: > > We have a board, based on s3c2416, with 128MB of RAM > and 1GB of NAND flash. > RAM is organized as 2 memory banks with far placed bases: > TOP > UNUSED 64MB > 64MB SDRAM > --- 128MB segment base 1 ----- > UNUSED 64MB > 64MB SDRAM > -- 128MB segment base 0 ------ > BOTTOM > > So we could have only 64MB as one piece; Due to u-boot reloaction code we > need to have u-boot in first 64MB also. ...
Why would that be the case? I would expect that U-Boot (with all it's heap and stack and everything) sits only at the upper end of the upper bank of memory (in your sgment 1). > ... . And now we have root filesystem > which we need to flash using u-boot, which is a little over this 64MB limit. Split it? > Is there some way to use second memory bank from u-boot? > Is it possible to tftp file in parts and flash it on NAND in parts? > (This requires handling of bad blocks too) > > We need to flash using u-boot, that's requirement for speedy production. I somewhat doubt that. Booting Linux is probably a matter of 2 or 3 seconds, or less. You migth save that time again by using Linux' much better performing network stack, together with interleaving network traffic and flash writing. If I were in this situation, I'd probably run this under Linux. 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 The first thing we do is kill all the lawyers. (Shakespeare. II Henry VI, Act IV, scene ii) _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
