3.2.10. c0, Auxiliary Feature Register 0

The purpose of Auxiliary Feature Register 0 is to provide additional information about the features of the processor.

The Auxiliary Feature Register 0 is:

In the processor, the Auxiliary Feature Register 0 reads as 0x00000000.

Table 3.18 shows the results of attempted access for each mode.

Table 3.18. Results of access to Auxiliary Feature Register 0[9]

Secure privilegedNonsecure privilegedSecure UserNonsecure User
ReadWriteReadWriteReadWriteReadWrite
DataUndefinedDataUndefinedUndefinedUndefinedUndefinedUndefined

[9] An entry of Undefined in the table means that the access gives an Undefined Instruction exception when the coprocessor instruction is executed.


To access the Auxiliary Feature Register 0, read CP15 with:

MRC p15, 0, <Rd>, c0, c1, 3 ; Read Auxiliary Feature Register 0
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