Entry requirements are completely dependent on your nationality. Things can change, so for the most up-to-date visa and passport information, we advise checking the international travel advice for your nationality, below are two examples.
If you are travelling to Norway from the UK on a full British passport: https://www.gov.uk/foreign-travel-advice/norway
If you are travelling to Norway from Ireland on an Irish passport: https://www.ireland.ie/en/dfa/overseas-travel/advice/norway/