Programming Interface Information: This information is NOT intended to be
used as Programming Interfaces of VM/ESA. It is to be used for diagnosis only.

PTTBK

Prolog  

Control Block Contents  

PTTBK DSECT

Storage Layout  

Cross Reference (Contains links to field and bit definitions)  

PTTBK Prolog

 NAME       : HCPPTTBK
 DESCRIPTION: HCPPTTMT parameter block
 DSECT      : PTTBK
 FUNCTION   : Describe the fixed parameters for a call to
              entry point HCPPTTMT, which is used to test
              for null pages (pages which have not been
              translated and are entirely zeroes) in a range
              of guest addresses.
 LOCATED BY :
 CREATED BY : HCPVCHCK - During VMDUMP processing
 DELETED BY : HCPVCHCK - During VMDUMP processing
 SERIALIZED : The PTTBK is created and deleted by a single
              invocation of HCPVCHCK and is not accessible
              to other processes.
 COMMENTS   :
 

PTTBK Control Block Content



PTTBK DSECT

Hex   Dec Type/Val   Lng Label (dup)    Comments
---- ---- --------- ---- -------------- --------
0000    0 Structure      PTTBK          HCPPTTMT parameter block
0000    0 Signed       4 PTTBEGIN       FIRST ADDRESS IN THE RANGE
0004    4 Signed       4 PTTEND         LAST ADDRESS IN THE RANGE
0008    8 Bitstring    1 PTTPGST (256)  STATUS BYTES FOR EACH PAGE IN THE
                                        RANGE. MAXIMUM RANGE IS ONE MEG
                                        (I.E. ONE SEGMENT).
0108  264 Dbl-Word     8 PTTASIT        ADDR SPACE ID TOKEN FOR REQUEST
          1... ....      PTTNULL        X'80' Page is null (has not been
                                        translated and is entirely
                                        zeroes)
          00000110       PTTBKLEN       *-PTTBK LENGTH OF PPTBK IN BYTES
          00000022       PTTSIZE        (PTTBKLEN+7)/8 LENGTH OF PTTBK IN
                                        DWORDS
 

PTTBK Storage Layout

*** PTTBK - HCPPTTMT parameter block
*
*     +---------------------------+---------------------------+
*   0 |         PTTBEGIN          |          PTTEND           |
*     +---------------------------+---------------------------+
*   8 |                                                       |
*     =                       PTTPGST                         =
*     |                                                       |
*     +-------------------------------------------------------+
* 108 |                       PTTASIT                         |
*     +-------------------------------------------------------+
* 110
*
*** PTTBK - HCPPTTMT parameter block
 

PTTBK Cross Reference

(contains links to field and bit definitions)
Symbol         Dspl Value
-------------- ---- -----

PTTASIT        0108

PTTBEGIN       0000

PTTBKLEN       0108 00000110

PTTEND         0004

PTTNULL        0108 80

PTTPGST        0008

PTTSIZE        0108 00000022
This information is based on VM/ESA 2.4.0.
Last updated on 3 Aug 1999 at 12:25:13 EDT.
Copyright IBM Corporation, 1990, 1999