[U-Boot-Users] how to make a core uboot?

Dear all: I get an arm platform from my friend and it is not in the list of boards in include folder. I intend to make a pure uboot, without including any driver but only basic cpu setting and uboot commands supported. But I cannot see any config option in Makefile. I know I may choose any config in boards and truncate those things I don't need at all. But I send this mail and want to know is there already a config option or some fast way I can meet my requirement? appreciate your help, miloody