AM263PX-RESTRICTED-SECURITY: MPU Firewalls

Part Number: AM263PX-RESTRICTED-SECURITY
Other Parts Discussed in Thread: SYSCONFIG

Hi Team, 

    1.   From trm i understood there are few intiators list r5 core's, HSM , DebugSS, CPSW, ICSS, EDMA . 
However, I noticed DebugSS, EDMA are not listed under initiators list in syscfg->MPU firewall settings. Is there any specific reason ??
    2. In SysConfig → MPU Firewalls, under “Priv IDs Allowed”, there is an option called EXTERNAL_ID.
       what exactly EXTERNAL_ID represent?? which initiator does it correspond to ?
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