Vehicle-mounted information processing apparatus and vehicle-mounted information processing method for converting between a virtual and physical address

A vehicle-mounted information processing method comprising:

• providing, in a vehicle-mounted information processing apparatus, a plurality of processing units to execute processing in parallel, and a plurality of shared storage units that are accessible by the plurality of processing units;
• providing, in the vehicle-mounted information processing apparatus, a first storage unit that stores an address conversion table in which a correspondence between virtual addresses and physical addresses is stored;
• providing, in the vehicle-mounted information processing apparatus, an address converting unit between the plurality of processing units and the plurality of shared storage units to convert between virtual addresses used by the processing units when accessing stored information and physical addresses in the plurality of shared storage units;
• exchanging information between the plurality of processing units via at least one shared storage unit of the plurality of shared storage units;
• detecting an abnormality occurred at the at least one shared storage unit of the plurality of shared storage units including a predetermined timing at which an attack from outside has been detected;
• changing the at least one shared storage unit used to exchange information in response to detecting the abnormality occurred at the at least one shared storage unit including the attack from outside has been detected;
• and
• changing, by the address converting unit, the correspondence between the virtual addresses and the physical addresses stored in the first storage unit, wherein the changes are made at the predetermined timing to switch the at least one shared storage unit where the plurality of processing units exchange information to a different shared storage unit of the plurality of shared storage unit.