[LinuxBIOS] Question about raminit.c

Quick question about raminit.c

Seems like it sets register values just enough to get going (function  
sdram_set_registers) and then detects spd on the memory and the resets  
the register values according to the memory. Correct?

Wouldn't make sense to just detect the spd values first and then set  
the registers??

Or, does it have to set the register values just enough to get going  
so it can then detect spd?

Thanks - Joe