arndale board cannot write cp15 ,can someone help me?

Hello, Maybe it's a stupid question. I want to modify cp15 register. but I found that the register cannont be written,it can ony be read. Could someone help me with that? distribute version: ubnuntu linaro 13.07 arndale board kernel:3.10.2+ Best Regards __

Arndale board cannont disable prefetch on

SMC) to do prefetch off safely. But I found that I cannot get the public interface to do that. Could someone give me a hand? Platform: 1) linaro ubuntu 13.07 2) arndale board 3) No Virtualization enabled Best Regards Dai Yan ___ linaro-dev mailing list