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