Hi folks, In case anyone else has run into this and can point me to a quick fix:
I've been making mods to the u-boot 1.2.0 sources that came with the DM355 EVM. My rebuilt u-boot runs fine and can boot from TFTP, but the first time it tries to "nboot" it thinks there are ECC errors, so autoboot fails. From the u-boot command line if I try to nboot, the second and subsequent times all succeed, so I imagine there's some state info in the ECC calculations that isn't getting reset properly. Example output, breaking to command line before any autoboot runs: # nboot 0x80700000 0 0x400000 Loading from NAND 1GiB 3,3V 8-bit, offset 0x400000 too many erros to be corrected! nand_read_ecc: Failed ECC read, page 0x00000800 on chip 0 ** Read error # nboot 0x80700000 0 0x400000 Loading from NAND 1GiB 3,3V 8-bit, offset 0x400000 Image Name: Linux-2.6.10_vidbox Image Type: ARM Linux Kernel Image (uncompressed) Data Size: 1463084 Bytes = 1.4 MB Load Address: 80008000 Entry Point: 80008000 # The u-boot binary that came with the board works, and I had to change the config in the sources to get it booting at all, so presumably these aren't *exactly* the sources used to build the binary that came with the board. I will now be burying my head in the datasheets for ECC operation and digging around in the u-boot nand sources debugging.. but if anyone has any pointers that would save me time, I would be most thankful. Cheers, -- Jon Povey, Design Engineer [EMAIL PROTECTED] | +44(0)1280 825983 Racelogic is a limited company registered in England. Registered number 2743719 . Registered Office Unit 10, Swan Business Centre, Osier Way, Buckingham, Bucks, MK18 1TB . The information contained in this electronic mail transmission is intended by Racelogic Ltd for the use of the named individual or entity to which it is directed and may contain information that is confidential or privileged. If you have received this electronic mail transmission in error, please delete it from your system without copying or forwarding it, and notify the sender of the error by reply email so that the sender's address records can be corrected. The views expressed by the sender of this communication do not necessarily represent those of Racelogic Ltd. Please note that Racelogic reserves the right to monitor e-mail communications passing through its network _______________________________________________ Davinci-linux-open-source mailing list [email protected] http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source
