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Display of RAM and NAND size on latest u-boot(2012) defers from 2010 uboot

If use the latest u-boot  (2012) on the same board which has DM355 processor, i see DRAM:  64 MiB and NAND:  256 MiB

when i use 2010 u-boot on the same board which has the same DM355 processor, i see   DRAM:  128 MiB and NAND:  128 MiB, how can this be possible ?

*************** 2012 u-boot  Release *********************

U-Boot 2012.07 (Sep 05 2012 - 15:37:40)

I2C:   ready
DRAM:  64 MiB
NAND:  256 MiB

**************** 2010 u-boot Release *********************

U-Boot 2010.06 (Aug 17 2010 - 14:56:30)

   Cores: ARM 216 MHz
   DDR:   133 MHz
   I2C:   ready
   DRAM:  128 MiB
   NAND:  128 MiB