@AcillClassics

As has been stated the strange part is also that morphos boots just fine, ...
Is there something (envar? in uboot) which morphos ignores or doesn't affect morphos? Something like aos4_ddr_controller (there probably isn't anything called that) do a printenv (you should be able to do it when booting to morphos)

Noticed that your log doesn't mention the ddr controller?

but the other logs mentioned states ddr controller is set to cache lines.

It would seem that one dd3 stick is wrong (might report a wrong size) remove the stick that reports 6GB, remove all unnecessary hard drives and usb devices (for booting) and try that, it shouln't complain about the memory (just remembered, do you have to have pairs of dd3 sticks?)

IF you then get the stripped down system to boot begin adding back one item at the time.