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

Virtual Memory System Architecture (VMSA)
B3.11 Virtual Address to Physical Address translation operations
CP15 c7 includes operations for Virtual Address (VA) to Physical Address (PA) translation. For more
information, see CP15 c7, Virtual Address to Physical Address translation operations on page B3-130. The
details of these operations depend on whether the Security Extensions are implemented.
All VA to PA translations take account of the TEX remapping when this remapping is enabled, see The
alternative descriptions of the Memory region attributes on page B3-32.
A VA to PA translation operation might require a translation table walk, and an external abort might occur
on this walk. For more information, see Behavior of external aborts on a translation table walk caused by
a VA to PA translation on page B3-46. If an external abort occurs on this walk:
The Physical Address Register, PAR:
— is not updated if the abort is synchronous
— is UNPREDICTABLE if the abort is asynchronous.
if the Security Extensions are implemented, fault status and fault address register updates occur only
in the security state in which the abort is handled. Fault address and fault status registers in the other
security state are not changed.
ARM DDI 0406B Copyright © 1996-1998, 2000, 2004-2008 ARM Limited. All rights reserved. B3-63