Programming Interface Information: This information is NOT intended to be used as Programming Interfaces of z/VM.

#### PAG39

Prolog

Control Block Contents
PAG39 DSECT

Storage Layout

Cross Reference (Contains links to field and bit definitions)

#### PAG39 Prolog

     Name       : HCPPAG39
     Description: ESA/390 Page Table Entry
     DSECT      : PAG39
     Function   : A Page Table Entry is a hardware architected
                  area that describes one 4K page of virtual
                  storage.

#### PAG39 Control Block Content

#### PAG39 DSECT

    Hex   Dec Type/Val   Lng Label (dup)    Comments
    ---- ---- --------- ---- -------------- --------
    0000    0 Structure      PAG39          ESA/390 Page Table Entry
    0000    0 Signed       4 PAGENTRY       ESA/390 Page Table Entry
              00000004       PAGLENTH       *-PAGENTRY Length of 1 ESA/390
                                            PTE
    0004    4 Signed       4 PAGNEXT (0)    Next ESA/390 Page Table Entry
    0000    0 Bitstring    1 *              Bits 1-7 of the page frame real
                                            address. Bit 0 must be 0 in a
                                            valid ESA/390 PTE.
    0001    1 Bitstring    1 *              Bits 8-15 of the page frame real
                                            address.
    0002    2 Bitstring    1 PAGSTAT        Address bits and status bits
              .... .1..      PAGINVAL       X'04' Page Table Entry is invalid
              .... ..1.      PAGPROT        X'02' PTE is page protected (read
                                            only)
    0003    3 Bitstring    1 *              Reserved

#### PAG39 Storage Layout

    *** PAG39 - ESA/390 Page Table Entry
    *
    *     +---------------------------+
    *   0 |         PAGENTRY          |
    *     +---------------------------+
    *
    *** PAG39 - ESA/390 Page Table Entry

    *** Overlay for PAGENTRY in PAG39
    *
    *     +------+------+------+------+
    *   0 |//////|//////|:STAT |//////| 4
    *     +------+------+------+------+
    *
    *** Overlay for PAGENTRY in PAG39

#### PAG39 Cross Reference

    Symbol         Dspl Value
    -------------- ---- -----
    PAGENTRY       0000
    PAGINVAL       0002 04
    PAGLENTH       0000 00000004
    PAGNEXT        0004
    PAGPROT        0002 02
    PAGSTAT        0002

This information is based on z/VM V5R2.0. Last updated on 12 Apr 2006 at 17:14:02 EDT.
Copyright IBM Corporation, 1990, 2005