Turn off prefetchers for cortex a72

Hello all,

I am trying to find resources to turn off prefetchers (l1 and l2) for cortex a72.

So far I have been trying to understand https://developer.arm.com/documentation/100095/0001/level-2-memory-system/l2-cache-prefetcher 

But I am not sure how to write into these registers

I am familiar with intel and the instructions (read: wrmsr and rdmsr ) to read into model-specific registers but I couldn't find any for arm.

Is there any resource that can help me write into these registers and also mention the caveats [privileges required etc ]  for writing ? 

Thanks & Regards 

Anilava