arch.sm213.machine.student
Class VirtualMemoryCPU

java.lang.Object
  java.util.Observable
      machine.AbstractCPU
          arch.sm213.machine.AbstractSM213CPU
              arch.sm213.machine.student.CPU
                  arch.sm213.machine.student.VirtualMemoryCPU

public class VirtualMemoryCPU
extends CPU

Virtual Memory enabled CPU

Nested Class Summary

Nested classes/interfaces inherited from class machine.AbstractCPU

AbstractCPU.ImplementationException, AbstractCPU.InternalState, AbstractCPU.InvalidInstructionException, AbstractCPU.MachineHaltException

Field Summary

Fields inherited from class arch.sm213.machine.AbstractSM213CPU

insOp0, insOp1, insOp2, insOpCode, insOpExt, insOpImm, instruction, pc, physMem, ps, ptbr

Fields inherited from class machine.AbstractCPU

is, mem, reg

Constructor Summary

VirtualMemoryCPU(String name, AbstractMainMemory memory)

Method Summary

int	translateAddress(int va) Translate virtual address to physical address.

Methods inherited from class arch.sm213.machine.student.CPU

execute, fetch

Methods inherited from class arch.sm213.machine.AbstractSM213CPU

cycle, enableVirtualMemory, setPC

Methods inherited from class machine.AbstractCPU

getMainMemory, getName, getPC, getProcessorState, getRegisterFile, isInterrupt, newInstance, start, triggerInterrupt

Methods inherited from class java.util.Observable

addObserver, clearChanged, countObservers, deleteObserver, deleteObservers, hasChanged, notifyObservers, notifyObservers, setChanged

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

VirtualMemoryCPU

public VirtualMemoryCPU(String name,
                        AbstractMainMemory memory)

Method Detail

translateAddress

public int translateAddress(int va)
                     throws AbstractMainMemory.InvalidAddressException

Translate virtual address to physical address.

Overrides:

translateAddress in class AbstractSM213CPU

Parameters:

va - virtual address

Returns:

physical address

Throws:

AbstractMainMemory.InvalidAddressException - if virtual address is not valid (i.e, not mapped)