Safety-critical variables securing system for vehicle, has lockable memory including data for two sets of addresses, and processor instructing management unit to unlock lockable memory before requesting write to one of sets of addresses

摘要

The system has a general-purpose memory and a lockable memory including data for two sets of addresses. A memory management unit selectively writes the data to one of the general-purpose memory and the lockable memory, and selectively locks the lockable memory by preventing writing to the lockable memory. A processor instructs the memory management unit to unlock the lockable memory before requesting a write to one of the sets of addresses. The processor selectively performs remedial action when a write request to the lockable memory is detected while the lockable memory is locked. An independent claim is also included for a method for securing safety-critical variables in a memory of a vehicle.