Hi, I am new to U-Boot, how to get started??

please somebody help me ...

And my aim is to port U-boot to omap2430 SDP with pop memory processor board. Anybody worked on porting of U-boot to omap2430sdp?? please send me in details where to start?? And 1) what the lowest version of tool chain (arm cross compiler) i must use to cross-compile u-boot

i want to know what will be the diffrences in porting U-boot to a processor without pop memory and with pop memory

please help me