SRC_CTLMASK
PUT32(dev, CONC_dSRCIO_OFF, (dtemp & SRC_CTLMASK) | ((int)reg << 25));
writeval = (dtemp & SRC_CTLMASK) | SRC_WENABLE |
(GET32(dev, CONC_dSRCIO_OFF) & SRC_CTLMASK) | dtemp);
(GET32(dev, CONC_dSRCIO_OFF) & SRC_CTLMASK) & ~dtemp);