PAG39 Back to Index page
 
Prolog 
Control Block Contents 
   PAG39 DSECT
Storage Layout 
Cross Reference (Contains links to field and bit definitions)
Programming Interface Information:
This information is NOT intended to be
used as Programming Interfaces of z/VM.


  PAG39 Prolog Top of page
  
 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.
 RELOCATION CONSIDERATIONS : None
 
 
  PAG39 Control Block Content Top of page
  




 PAG39 DSECT
Top of page


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' PAGINVAL Page Table Entry
                                        is invalid
          .... ..1.      PAGPROT        X'02' PAGPROT PTE is page
                                        protected (read only)
0003    3 Bitstring    1 *              Reserved
 
 
  PAG39 Storage Layout Top of page
  
          
*** 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 Top of page
  
 
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 7.3.0 Last updated on 22 Jun 2022 at 15:53:20 EDT.
Copyright IBM Corporation, 1990, 2022