[U-Boot-Users] Xloader

[Pete MacKay <linux@architechnical.net>]

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
> 
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