Actually I have sent a mail previously, but I found more info for my issue.

So I am sorry that I that I send mails again,

In fact, I found that when I call " MCR p15, 1, %0, c15, c0", 3, I am trapped into unsecured mode.

And  I think that I have to call secure monitor(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