Help needed to understand code

[Shubhangi Jadhav]

Hi,

I'm a LinuxBIOS newbie. I have downloaded the source code for the same and
was trying to understand it. Looks too complicated to me.
    I'd started with the code for Intel440gx mainboard, but failed to
understand how the northbridge and southbridge intialization routines are
invoked.
    Can someone tell me how to go about understanding the code?

Thanks,
Shubhangi