TRCPRGCTLR
bus_write_4(sc->res, TRCPRGCTLR, TRCPRGCTLR_EN);
if ((bus_read_4(sc->res, TRCPRGCTLR) & TRCPRGCTLR_EN) == 0)
bus_write_4(sc->res, TRCPRGCTLR, 0);
TRCPRGCTLR, TRAP);