AM5728: sys_nirq1 enabling issue

Part Number: AM5728

Hi!

I'm trying to use interrupt based on sys_nirq1.

/* Registration Part */
HwiP_Handle hwi_handler;
HwiP_Params parameters;

HwiP_Params_init(&parameters);
HwiP_create(39, (HwiP_Fxn) hwi_handle_func, &parameters);
HwiP_enableInterrupt(39);


/* irq func */
void hwi_handle_func(void *arg)
{
    HwiP_clearInterrupt(39);
}

I provided code I use above. But interrupts does not work.
Question which irq line number I should use for this?

I found two posts:
https://e2e.ti.com/support/processors-group/processors/f/processors-forum/779630/rtos-am5728-how-to-use-sys_nirq1-by-hwi_create-in-sysbios
and
https://e2e.ti.com/support/processors-group/processors/f/processors-forum/777871/rtos-am5728-how-to-send-interrupt-from-external-device-to-a15_0-by-using-sys_nirq1-or-sys_nirq2-pin

In one it's written, that sys_nirq1 should be defined as interrupt number 2 in other interrupt number 39. And both answers marked as correct answer.

Sys_nirq1 is GIC ID 39 , MPU_IRQ_7 and IRQ CROSSBAR Instance Number is 2.
Which one I should pick? And how to enable interrupt properly?

Kind regards,
Ilya