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INVLPG          Invalidate TLB Entry                 Flags: Not altered

INVLPG source                                        CPU: 486+ Priv

    Invalidates (flushes) the translation lookaside buffer (TLB) entry
    specified with the source operand. The source operand is a memory
    address. The processor determines the page that contains that
    address and flushes the TLB entry for that page.

    The INVLPG instruction is a privileged instruction. When the
    processor is running in protected mode, the CPL of a program or
    procedure must be 0 to execute this instruction. This instruction is
    also implementation-dependent; its function may be implemented
    differently on future Intel Architecture processors.

    The INVLPG instruction normally flushes the TLB entry only for the
    specified page; however, in some cases (MOV to/trom CRn) it flushes
    the entire TLB.


    Opcode      Format
    0F 01/7     INVLPG mem


    Length and timing
    Operands    Bytes   8088    186     286     386     486     Pentium
    -             ??    -       -       -       -       ??     ??    NP