Class PageTableEntry

constructor

• new PageTableEntry(flagBits: Bit[], frameNbr: Bit[]): PageTableEntry

  This constructor creates a new page table entry with the given flag bits, page number and frame number.

  Parameters

  • flagBits: Bit[]

    The flag bits of the page table entry.
  • frameNbr: Bit[]

    The number of the associated page frame.

  Returns PageTableEntry

Static ReadonlyNUMBER_OF_BITS_FOR_FLAGS_DEC

Static ReadonlyNUMBER_OF_BITS_FOR_PAGE_FRAME_NUMBER_DEC

ReadonlyflagBits

ReadonlyframeNbr

clearAccessableOnlyInKernelModeFlag

• clearAccessableOnlyInKernelModeFlag(): void

  This method clears the flag that indicates that this page can only be accessed in kernel mode.

  Returns void

clearChangedFlag

• clearChangedFlag(): void

  This method clears the changed flag of the page table entry.

  Returns void

clearExecutableFlag

• clearExecutableFlag(): void

  This method clears the executable flag of the page table entry.

  Returns void

clearPinnedFlag

• clearPinnedFlag(): void

  This method clears the pinned flag of the page table entry.

  Returns void

clearPresentFlag

• clearPresentFlag(): void

  This method clears the present flag of the page table entry.

  Returns void

clearWritableFlag

• clearWritableFlag(): void

  This method clears the writable flag of the page table entry.

  Returns void

isAccessableOnlyInKernelMode

• isAccessableOnlyInKernelMode(): boolean

  This method checks whether the page is accessable only in kernel mode.

  Returns boolean

  True if the page is accessable only in kernel mode, false otherwise.

isExecutable

• isExecutable(): boolean

  This method checks whether the page is executable.

  Returns boolean

  True if the page is executable, false otherwise.

isPinned

• isPinned(): boolean

  This method checks whether the page is pinned.

  Returns boolean

  True if the page is pinned, false otherwise.

isPresent

• isPresent(): boolean

  This method checks whether the page is present (whether a page frame is associated to it).

  Returns boolean

  True if the page is present, false otherwise.

isWritable

• isWritable(): boolean

  This method checks whether the page is writable.

  Returns boolean

  True if the page is writable, false otherwise.

setAccessableOnlyInKernelModeFlag

• setAccessableOnlyInKernelModeFlag(): void

  This method sets the flag that indicates that this page can only be accessed in kernel mode.

  Returns void

setChangedFlag

• setChangedFlag(): void

  This method sets the changed flag of the page table entry.

  Returns void

setExecutableFlag

• setExecutableFlag(): void

  This method sets the executable flag of the page table entry.

  Returns void

setPinnedFlag

• setPinnedFlag(): void

  This method sets the pinned flag of the page table entry.

  Returns void

setPresentFlag

• setPresentFlag(): void

  This method sets the present flag of the page table entry.

  Returns void

setWritableFlag

• setWritableFlag(): void

  This method sets the writable flag of the page table entry.

  Returns void

toDoubleword

• toDoubleword(): DoubleWord

  This method converts the page table entry to a doubleword.

  Returns DoubleWord

  A doubleword representing the page table entry.

toString

• toString(): string

  This method returns a string representation of the page table entry.

  Returns string

  A string representation of the page table entry.

wasChanged

• wasChanged(): boolean

  This method checks whether the page was changed.

  Returns boolean

  True if the page was changed, false otherwise.