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how to enable Fiq in Real View?

I know how to make a fiq in CARM,but asfor the real View,it seem different. Can somebody help?
Should I write the program like this:
__irq void FIQ_Handler (void)
{ IOSET1 = 0x00FF0000; //Set the LED pins
EXTINT = 0x00000002;
}

but I see the startup
"FIQ_Handler B FIQ_Handler"
it seem like a endless loop,how can I make the code jump to FIQ

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