NAND partition problem (ATMEL at91sam9260-ek)

[Oleg Strikov]

Good day!
I've built my own 2.6.24 kernel for `subj` evaluation kit, all is OK
but i don't know how to create my own NAND partitions.
I think that at91sam NAND driver do it somewhere, but i can't find it
myself in kernel.
During boot i get a lot of confusing info, itll be GREAT if you can
explain me some points!

Starting kernel ...

Uncompressing Linux.............................................................................................
done, booting the kernel.
Linux version 2.6.24 (root at oleg.strikov) (gcc version 4.1.2) #16 Mon
Mar 31 19:22:04 MSD 2008
CPU: ARM926EJ-S [41069265] revision 5 (ARMv5TEJ), cr=00053177
Machine: Atmel AT91SAM9260-EK
Memory policy: ECC disabled, Data cache writeback
...
NAND device: Manufacturer ID: 0xec, Chip ID: 0xda (Samsung NAND 256MiB
3,3V 8-bit)
AT91 NAND: 8-bit, [SET-1] Hardware Syndrome ECC
Scanning device for bad blocks
Creating 2 MTD partitions on "at91_nand":
0x00000000-0x00040000 : "Partition 1"
0x00040000-0x10000000 : "Partition 2"
/* WHERE CAN I CHANGE OFFSETS AND LENGTH OF MY PARTITIONS?
CAN I DO IT WITHOUT PASSINGKERNEL ARGUMENTS? */
...
List of all partitions:
1f00        256 mtdblock0 (driver?)
1f01     261888 mtdblock1 (driver?)
/* WHAT `(driver?)` MEANS? ALL IS OK? :)  */

No filesystem could mount root, tried:  ext2 cramfs msdos vfat
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(1,0)

-----------
One additional question, please...
Is it correct way:
1) I place my jffs image on NAND (e.g. 0x10 - 0x20)
2) I create mtdblock partition 0x10-0x20
3) I pass this part like rootfs
?

THANKS!!!