[U-Boot-Users] Xloader

[Pete MacKay]

X-loader is for boards booting from the Samsung OneNAND flash chip.  You have
only 1K of RAM that's sucked out of the first NAND block's page 0 on power
up, so you have to bootstrap the boot loader.  You position u-boot at the 2K
boundary (page 1) of block 0.  X-loader's job is to initialize the RAM on
your board and copy the NAND pages containing u-boot into it and then branch
execution into the relocated u-boot reset vector in RAM.

Not many JTAG products support OneNAND, but I hear they're out there.

It sounds like you have a learning curve ahead of you, but I hope this
helps.  Check out my latest post on shoe-horning the x-loader function
directly into u-boot.  Good luck!


harsh poshtiwala wrote:
> 
> Hi Friends,
> 
> We are trying to bringup ARM926EJS core based board.
> 
> We need to port uboot on it,I learned that before i port uboot we need
> to port XLOADER and some JTAG memory initialization file as well as
> some of the plain files on the board.
> 
> 
> We are using Platform toolset supplied by ST to flash uboot and all this
> files.
> 
> We have a JTAG probe as well that we would like to connect to board
> once we get our xloader flased.
> 
> 
> So why do we need XLOADER and other files to port Uboot?
> 
> Any document to answer this ? or any commets ?
> 
> -- 
> Thanks & Regards
> Harsh
> 
> -------------------------------------------------------------------------
> This SF.net email is sponsored by DB2 Express
> Download DB2 Express C - the FREE version of DB2 express and take
> control of your XML. No limits. Just data. Click to get it now.
> http://sourceforge.net/powerbar/db2/
> _______________________________________________
> U-Boot-Users mailing list
> U-Boot-Users at lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/u-boot-users
> 
> 

-- 
View this message in context: http://www.nabble.com/Xloader-tf3774827.html#a10757871
Sent from the Uboot - Users mailing list archive at Nabble.com.