[U-Boot-Users] Xloader
Pete MacKay
linux at architechnical.net
Wed May 23 07:44:53 CEST 2007
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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