ERXRDPTL
erxrd = nolock_regw_read(priv, ERXRDPTL);
nolock_regw_read(priv, ERXRDPTL),
nolock_regw_write(priv, ERXRDPTL, erxrdpt);
nolock_regw_write(priv, ERXRDPTL, erxrdpt);
reg = nolock_regw_read(priv, ERXRDPTL);