Entered command : help
>> nand writesb <addr> <nsect> 
-> Write a sb image to nand flash.
>> nand erase <chip> <block> <page> 
>> nand eraseall <chip>
>> nand read <chip> <block> <page> <layout>
>> nand write <chip> <block> <page> <layout>
>> nand readid <chip> 
>> nand init
>> nand bminit
>> nand partshow
>> nand partinit
>> memtest <addr> <size>
shell >>