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