The TRCDEVAFF1 characteristics are:
The value is a read-only copy of MPIDR_EL1[63:32] as seen from EL3, unaffected by VMPIDR_EL2.
- Usage constraints
Accessible only from the external debug interface.
Available in all configurations.
TRCDEVAFF1 is a 32-bit RO management register.
For the Cortex-A53 processor, MPIDR_EL1[63:32] is res0.
See the register summary in Table 13.3.
The TRCDEVAFF1 can be accessed through the external debug