CTI setup for halting all processors in A53

We have A53 with three uPs in our system. We are tying to debug one issue where I try to halt (b .) uP on certain condition but it will only halt process that detected the condition. My question is how do i halt all three processors on detection (detection by one processor). I know I need to use CTI, does anyone have an example core to halt all processors? 

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