PID and CID registers

hello everyone,

          so,far i have seen registers like ECOREVNUM PID0,PID1,PID2,PID3....PID7,CID0,CID1...CID4 in RTL code.

ECOREVNUM- engineering core revision number
PID- PHERIPHERAL ID REGISTER
CID- COMPONENT ID REGISTERS

what is the significance of these registers, is it useful for a verification engineer ?
if not why?

Thanks in advance

Regards
abhishek

In reply to abhishek403:

These registers should return hard-coded ID numbers based on the hardware revision of the RTL. You should need to verify they return the correct numbers. You’ll probably need to check ARM documentation our ask on one of their forums.