Beagle bone green Timer 4 - Timer 7

Hello. I have problems configuring Timer4 - Timer 7 of beagle bone MCU . Using mmap library of Beaglebone. I can access other registers but when accesing for example address TIMER_5_BASE_ADDRESS_START = 0x48046000 + offset . I am getting bus error. Is there a simple method to configure these timers to start working in input capture mode in beaglebone?