ARM Architecture Reference Manual ARMv7-A and ARMv7-R edition

Debug Register Interfaces
C6.7.5 Registers not implemented in the memory-mapped or external debug interface
In any Debug architecture version, the following registers are not implemented through the
memory-mapped or external debug interfaces:
DBGDRAR Debug ROM Address Register (DBGDRAR) on page C10-7
DBGDSAR Debug Self Address Offset Register (DBGDSAR) on page C10-8.
These registers are not required by an external debugger.
In addition, there is no interface to access to DBGDSCRint, DBGDTRRXint or DBGDTRTXint through
the memory-mapped or external debug interface. These operations are only available through the Baseline
CP14 interface.
ARM DDI 0406B Copyright © 1996-1998, 2000, 2004-2008 ARM Limited. All rights reserved. C6-51