DM648 global interrupt setting

Nowadays, I have complete EDMA3 copy by the way of writing registers, I read IPR/IPRH to wait the EDMA3 transfer complete, now I want to use transfer complete interrupt to sign the complete. I set the TCINTEN in OPT, OPT = 0x00100000, and trigger it manually ESR=0x1 .I use DMA channel 0, so I set IESR=0x1. I use EDMA3 global complete interrupt, the number is 24, and I use HWI_INT6 in BIOS, so I use C64_enableIER(C64_EINT6) to enable the interrupt in main func. And I want to enable Global Interrupt and NMI Interrupt, but I cannot find how to set it in using API and writing register, there is no CSL for DM648, and noting about it in PSP. Is there any APIs or documents about it?
Thank you!