i have to handle a NMI interrupt in bootloader(0xBFC00000), and i want to return to linux after the NMI interrupt, i think other regs maybe be useing by linux-kernel, i think the NMI handle only can use K0, K1. and i do not find the use of K0, K1 in linux-kernel interrupt or exception handle so i think if the NMI interrupt a linux interrupt handle, there is still no conflict. i am not sure my thinking is right, anyone can give some hints? Best regards zhuzhenhua