[U-Boot] mtd partitions

Hi,

I'm using a Coldfire m5329EVB and I would like to make some partitions (one for kernel and one for filsystem) on my NAND FLASH (16Mb). I've tryied to search the u-boot options (u-boo 2008.10) but it doesn't work at all.

Does anybody know the configure options or at least how to succeed in partitioning my NAND Flash?

Thanks in advance.