[U-Boot] how to build u-boot environment

[ong]

Hi,

May i know how to build the u-boot environment for my board?
Whats the different  below. I would like to know how to build u-boot environment. As i know its different with u-boot.bin.

make distclean
make at91sam9263ek_config
make CROSS_COMPILE=<path_to_cross-compiler/cross-compiler-prefix->

make distclean
make at91sam9263ek_dataflash_cs0_config
make CROSS_COMPILE=<path_to_cross-compiler/cross-compiler-prefix->
/Ong