[Buildroot] U-Boot Enviroment in NAND Flash ?

[Manuel Sahm]

Hello,

(It?s about the AT91SAM9260EK)

I want to locate the U-Boot and the U-Boot enviroment in NAND-Flash.

AT91Bootstrap at 0x00000000
U-Boot at 0x00020000
U-Boot Env at 0x00060000
U-BootEnv_Redund at 0x00080000

U-Boot Env Size is 0x 00020000

When U-Boot starts:
.
.(NAND and DATAFLASH is initialized)
.
***Warning - bad CRC or NAND, using default enviroment

How could I "activate" the enviroment variables located in NAND flash at 
address 0x00060000 ?

please help

thanks very very much

Best regards 

Manuel Sahm