"My father was a war hero, and he had a lot of rages and he was quite violent, and I do know the trauma of being a child and living in fear," Hall said Wednesday at the opening of the National Association for People Abused in Childhood's hot line.
"He has passed away, but I forgive him," the actress-model said.
The 49-year-old Texan became involved with the hot line through friends and her previous work with children's charities.
The hot line will be staffed by volunteers. It is aimed at helping adults who experienced abuse or neglect as a child.