cse378.pagetable
Class PageTableEntry

java.lang.Object
  cse378.AbstractBlock
      cse378.TaggedBlock
          cse378.pagetable.PageTableEntry

public class PageTableEntry
extends TaggedBlock

Represents the mapping between a virtual page and a physical page

Field Summary

(package private) static int	count
protected cse378.address.PhysicalPage	page
protected boolean	swapped

Fields inherited from class cse378.TaggedBlock

tag, tagBits

Fields inherited from class cse378.AbstractBlock

dirty, id, valid

Constructor Summary

PageTableEntry(cse378.address.VirtualPage v, cse378.address.PhysicalPage p)

Method Summary

cse378.address.PhysicalPage	getPhysical() Get the physical page represented by this mapping
cse378.address.VirtualPage	getTag() Get the virtual page represented by this mapping
boolean	isSwapped() Check if this page table entry has been swapped out
void	setPhysical(cse378.address.PhysicalPage p) Change the physical page represented by this mapping
void	setSwapped(boolean s)
void	setTag(cse378.address.VirtualPage tag) Change the virtual page represented by this mapping
java.lang.String	toString()

Methods inherited from class cse378.TaggedBlock

hasTag, setTag, update

Methods inherited from class cse378.AbstractBlock

getId, hashCode, isDirty, isValid, setDirty, setValid

Methods inherited from class java.lang.Object

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

Field Detail

swapped

protected boolean swapped

page

protected cse378.address.PhysicalPage page

count

static int count

Constructor Detail

PageTableEntry

public PageTableEntry(cse378.address.VirtualPage v,
                      cse378.address.PhysicalPage p)

Method Detail

getTag

public cse378.address.VirtualPage getTag()

Get the virtual page represented by this mapping

Overrides:

getTag in class TaggedBlock

Returns:

VirtualPage

setTag

public void setTag(cse378.address.VirtualPage tag)

Change the virtual page represented by this mapping

Parameters:

tag - new VirtualPage for this mapping

getPhysical

public cse378.address.PhysicalPage getPhysical()

Get the physical page represented by this mapping

Returns:

PhysicalPage

setPhysical

public void setPhysical(cse378.address.PhysicalPage p)

Change the physical page represented by this mapping

Parameters:

tag - new PhysicalPage for this mapping

isSwapped

public boolean isSwapped()

Check if this page table entry has been swapped out

Returns:

true is its been swapped out

setSwapped

public void setSwapped(boolean s)

toString

public java.lang.String toString()

Overrides:

toString in class TaggedBlock