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Linux/AM3352: whether the am335x's NMI is a really unmaskable interrupt or not?

Part Number: AM3352


Tool/software: Linux

hi, All.

i have a confusion about the am335x's NMI. i read the datasheet spruh73k and found there is not special description about the NMI;

and according to the datasheet, i can actully set the NMI priority lower than a normal interrupt. So in my opinion , is the NMI actually be treatd as a normal interrupt?

and if not, would the NMI interrupt cannot be masked and missed if it has been triggered on the AM335X at the hardware level;

and at the software level (that is in the linux kernel ), did it have any special handling for the NMI , which is different from an normal interrupt processing?

Any clues are thanks.