To handle interrupt from FPGA PB

Using Quaruts 14.0 on Linux 64bit on Altera's SOC dev kit.

There 2 example from Altera that i am using.

The Altera-SoCFPGA-HardwareLib-GPIO-CV-GNU and Altera-SoCFPGA-HardwareLib-FPGA-CV-GNU.

The FPGA side is GHRD from Altera.

I am trying to catch interrupt while pushing FPGA push button. Nothing happened on HPS side.

What is missing on the flow?

The actual code is:

alt_int_global_init();

alt_int_cpu_init();

alt_int_cpu_enable();

alt_int_global_enable();

target = 0x3;

alt_int_dist_target_set(ALT_INT_INTERRUPT_F2S_FPGA_IRQ0, target);

alt_int_dist_trigger_set(ALT_INT_INTERRUPT_F2S_FPGA_IRQ0, ALT_INT_TRIGGER_LEVEL);

alt_int_dist_enable(ALT_INT_INTERRUPT_F2S_FPGA_IRQ0);

alt_int_isr_register(ALT_INT_INTERRUPT_F2S_FPGA_IRQ0, fpga_isr_callback, NULL);