How to get address of a register: ARM Cortex A8?

Question

I want to get physical address of a co-processor register of ARM Cortex a8, say c9-User Enable Register (USEREN).

How can I get it ?

Thank you !!

Answer 1

Not all registers need to exist in a memory address. Co-processor registers are a good example for this. Co-processors are separate execution units and most of the time only way to access their registers are via instructions like mcr / mrc.