[U-Boot] start.s file

Hi everyone... In the quest of finding the code for relocation i have reached the start.s file present in u-boot-1.1.6\cpu\mpc83xx\ folder. Even its in assembly language (i dont know assembly language beyond movlw) i tried to understand that using the descriptions of the commands given in this site: http://publib.boulder.ibm.com/infocenter/systems/index.jsp?topic=/com.ibm.ai... but im not able to proceed much. Is there any better way to understand this.

thanks & regards, Deepak Gopalakrishnan