PCI was originally designed as an interconnect for personal computers; because of the nature of PCs at that time, the protocol architects did not anticipate the need for multiprocessors. Therefore, they designed the system assuming that the host processor would enumerate the entire memory space. Obviously, if another processor is added, the system operation would fail as both processors would attempt to service the system requests.
This paper outlines how to implement multiprocessor systems using industry standard practices established in the PCI paradigm.
Download this whitepaper to find out more information.