Hi Jon,
Actually we are facing a strange problem. I am using MT29F16G08DAA nand chip with page size: 4096 I have written UBL descriptor in block 1, page 0 and UBL in block 2, page 0. When I change boot mode to NAND, I do not see any message on console and as board is not falling back to SD mode, I suspect RBL found valid magic number. But I don't understand why it can't load UBL. On my head I suspect two possibilities a) ECC errors while copying UBL from NAND b) RBL is unable to find UBL (maybe information given in UBL descriptor is taken incorrectly by RBL) I do not have JTAG with me. Regards, Jitendra ________________________________ From: Jon Povey [mailto:[email protected]] Sent: Friday, January 23, 2009 2:38 PM To: Jain, Jitendra [PROTOOL/RTC/IN]; [email protected] Subject: RE: dm355:ecc query Seems pretty clear to me.. what part are you having trouble with? -- Jon Povey, Design Engineer [email protected] | +44(0)1280 825983 ________________________________ From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: 23 January 2009 05:16 To: [email protected] Subject: dm355:ecc query Hi, I am reading "sprufb3.pdf". I found following point on page 157. "Copy the User boot-loader from NAND flash to IRAM with hardware ECC error detection enabled. If a 4-bit ECC read error is detected, the UBL will correct the error via the ECC correction algorithm. If the read fails due to any other error, the descriptor search process begins anew in the next block after that in which the UBL descriptor was found for up to the first 24 blocks. If no valid UBL descriptor is found after searching 24 blocks, the RBL will try to boot via MMC/SD." Can anyone explain me what does this mean? Regards, Jitendra 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
