+ // Leaf PDE |
+ // |------------------------------| |----------------|
+ // |V|L|sw|//|RPN|sw|R|C|/|ATT|EAA| | usefulBits |
+ // |------------------------------| |----------------|
+ // [0] = V = Valid Bit |
+ // [1] = L = Leaf Bit = 1 if leaf |
+ // PDE |
+ // [2] = Sw = Sw bit 0. |
+ // [7:51] = RPN = Real Page Number, V
+ // real_page = RPN << 12 -------------> Logical OR
+ // [52:54] = Sw Bits 1:3 |
+ // [55] = R = Reference |
+ // [56] = C = Change V
+ // [58:59] = Att = Physical Address
+ // 0b00 = Normal Memory
+ // 0b01 = SAO
+ // 0b10 = Non Idenmpotent
+ // 0b11 = Tolerant I/O
+ // [60:63] = Encoded Access
+ // Authority
+ //