ARM Cortex-A35 Technical Reference Manual page 656

TraceVer [7:4]
UNKOWN, [7:4]
EDDFR[31:0] can be accessed through the external debug interface, offset
EDDFR[63:32] can be accessed through the external debug interface, offset
100236_0100_00_en
All other values are reserved.
Trace support. Indicates whether system register interface to a trace macrocell is implemented.
Defined values are:
Trace macrocell system registers not implemented.
0x0000
Trace macrocell system registers implemented.
0x0001
All other values are reserved.
A value of only indicates that no system register interface to a trace macrocell is
0x0000
implemented. A trace macrocell might nevertheless be implemented without a system register
interface.
Reserved, .
UNKNOWN
Copyright © 2015–2017, 2019 Arm Limited or its affiliates. All rights
reserved.
Non-Confidential
C8 Memory-mapped debug registers
C8.7 External Debug Feature Register
.
0xD28
.
0xD2C
C8-656