SK_IMR
CSR_WRITE_4(l, SK_IMR, 0);
CSR_WRITE_4(sc, SK_IMR, sc->sk_intrmask);
CSR_WRITE_4(sc, SK_IMR, sc->sk_intrmask);
CSR_WRITE_4(sc, SK_IMR, sc->sk_intrmask);
CSR_WRITE_4(sc, SK_IMR, sc->sk_intrmask);
CSR_WRITE_4(sc, SK_IMR, sc->sk_intrmask);