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

D.1.7 Use of AP[2] = 1, AP[1:0] = 0b10 in MMU access permissions
Deprecated and Obsolete Features
This encoding means read-only for both privileged mode and User mode accesses, but its use is deprecated
in VMSAv7. Use AP[2] = 1, AP[1:0] = 0b11. For details see Memory access control on page B3-28.
D.1.8 The Domain field in the DFSR
Use of the Domain field in the DFSR is deprecated. For details see c6, Data Fault Address Register (DFAR)
on page B3-124.
D.1.9 Watchpoint Fault Address Register in CP15
Use of the CP15 alias of the Watchpoint Fault Address Register (DBGWFAR) is deprecated. Use the CP14
DBGWFAR instead. For details see Extended CP14 interface on page C6-33.
D.1.10 CP15 memory barrier operations
Use of the CP15 c7 memory barrier operations is deprecated. The ARM and Thumb instruction sets include
instructions that perform these operations. Table D-1 shows the deprecated CP15 encodings and the
replacement ARMv7 instructions.
Deprecated CP15 encoding
CRn opc1 CRm opc2
D.1.11 Use of Hivecs exception base address in PMSA implementations
Use of the high vector exception base address (Hivecs) of 0xFFFF0000 is deprecated in PMSA
implementations. ARM recommends that Hivecs is used only in VMSA implementations. For more
information, see Exception vectors and the exception base address on page B1-30.
D.1.12 Use of Secure User halting debug
Table D-1 Deprecated CP15 c7 memory barrier operations
Operation Instruction description
c7 0 c5 4 Instruction Synchronization Barrier See ISB on page A8-102
c7 0 c10 4 Data Synchronization Barrier See DSB on page A8-92
c7 0 c10 5 Data Memory Barrier See DMB on page A8-90
From v7 Debug, the use of Secure User halting debug is deprecated. For more information, see About
invasive debug authentication on page C2-2.
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