How to get the specific address on an Access Breakpoint with a range?

When I set an Access Breakpoint on a memory range, I'd like to use the specific address when the breakpoint is triggered. For example:

func void showAddress(void) {
  if (BA_MODE == BA_WRITE) {
    printf("Write to 0x%X.\n", BA_ADDR);
  } else {
    printf("Read from 0x%X.\n", BA_ADDR);
  }
}

ba readwrite 0x40002000, 0x40, 1, "showAddress()"

Are there any system variables that represent the attributes of the access that triggers the breakpoint?

Please note: the "printf" in the code above is just an example. Actually I'd like to simulate certain hardware behaviour, for example memory mirrors when not all address lines are used. Such a feature could also help to write simulations for external devices.