Barton and Jose Enrique are the two other players whose futures are insecure.
But Barton said he was waiting to see what his Scouse mate Nolan was going to do before he signed a new deal.
Kevin Nolan: "Negotiations are at an advanced stage. Most things have been agreed and I would think I will sign next week or the week after.
"The gaffer and the board have been great about it. It's almost done and dusted.
"I want the whole thing over and done with because, until I sign, everyone is going to be asking me about it.
"We have made so much progress since relegation. We need to keep important players and sign more, which is what the gaffer intends to do.
"I am desperate to bring success to St James' Park. I watched Newcastle in their two FA Cup finals at the end of the '90s and the fans deserved at least one of those to end in victory.
"We know we can bring back the good days and go one better by winning a trophy. That is my dream, for it to happen in my time."