question on e7500 sizeram

[Ronald G. Minnich]

freebios/src/northbridge/intel/E7500/northbridge.c

In this file there is a variable called remap_high. I assume the function 
of this is to remap the high memory (512MB) so it is contiguous with the 
low 512MB. 

Even when remap_high is true, on -current, I end up with two 512MB 
segemnts, one at 0 and one at 4 GB. 

Anybody have any idea as to why this would happen? It's confusing 2.4.19 
from what I can see.

ron