Soorya Manasam (1992)
Soorya Manasam is a 1992 critically acclaimed Malayalam movie by Viji Thampi starring Mammootty in the title role. Plot is inspired from 1937 American novel Of Mice and Men by John Steinbeck. Mammootty played the role of a lunatic, Putturumees, one of the most acclaimed characters in his career. Raghuvaran played the villain, who played the role of the estate manager, where Urmees worked.
More at Wikipedia.