SK_CSR
CSR_WRITE_2(sc, SK_CSR, SK_CSR_SW_RESET);
CSR_WRITE_2(sc, SK_CSR, SK_CSR_MASTER_RESET);
CSR_WRITE_2(sc, SK_CSR, SK_CSR_SW_UNRESET);
CSR_WRITE_2(sc, SK_CSR, SK_CSR_MASTER_UNRESET);
DPRINTFN(2, ("sk_reset: sk_csr=%x\n", CSR_READ_2(sc, SK_CSR)));
CSR_READ_4(sc_if->sk_softc, SK_CSR)));