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

Virtual Memory System Architecture (VMSA)
B3.12.14 c0, IMPLEMENTATION DEFINED Auxiliary ID Register (AIDR)
The IMPLEMENTATION DEFINED Auxiliary ID Register, AIDR, provides implementation-specific ID
information. The value of this register must be used in conjunction with the value of MIDR.
The IMPLEMENTATION DEFINED AIDR is:
a 32-bit read-only register
accessible only in privileged modes
when the Security Extensions are implemented, a Common register
introduced in ARMv7.
The format of the AIDR is IMPLEMENTATION DEFINED.
Accessing the AIDR
To access the AIDR you read the CP15 registers with set to 1, set to c0, set to c0, and
set to 7. For example:
MRC p15,1,,c0,c0,7 ; Read IMPLEMENTATION DEFINED Auxiliary ID Register
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