PHS_MESS_IN
if (sr == (CSR_ABORT | PHS_MESS_IN) ||
sr == (CSR_UNEXP | PHS_MESS_IN) ||
sr == (CSR_SRV_REQ | PHS_MESS_IN)) {
case CSR_XFER_DONE | PHS_MESS_IN:
case CSR_UNEXP | PHS_MESS_IN:
case CSR_SRV_REQ | PHS_MESS_IN: