CLK_SLOT
status->total= nvkm_falcon_rd32(falcon, 0x508 + (CLK_SLOT * 0x10));
nvkm_falcon_wr32(falcon, 0x508 + (CLK_SLOT * 0x10), 0x80000000);
nvkm_falcon_wr32(falcon, 0x50c + (CLK_SLOT * 0x10), 0x00000003);