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Prolog 
Control Block Contents 
   PURBK 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.


  PURBK Prolog Top of page
 
 NAME       : HCPPURBK
 DESCRIPTION: Minidisk Cache Purge block
 DSECT      : PURBK
 FUNCTION   : Provide information needed for virtual
              interrupt processing to purge specific
              minidisk cache data.
 LOCATED BY : Linked list hanging from IORPURGE.IORBK
 CREATED BY : HCPMD3
 DELETED BY : HCPVIT
 
 
  PURBK Control Block Content Top of page
 

 PURBK DSECT Top of page
Hex Dec Type/Val Lng Label (dup) Comments ---- ---- --------- ---- -------------- -------- 0000 0 Structure PURBK Minidisk Cache Purge block 0000 0 Address 4 PURNEXT Pointer to next PURBK 0004 4 Address 4 PURRDEV Pointer to RDEV block 0008 8 Signed 4 PURSEXT Start extent to purge 000C 12 Signed 4 PUREEXT End extent to purge 0010 16 Signed 2 PURHSID Hash Id 0012 18 Signed 2 PURTPCY Tracks per cylinder 0014 20 Bitstring 36 * Reserved 00000038 PURBYLN *-PURBK Byte length of PURBK 00000007 PURDWSZ ((PURBYLN+7)/8) Doubleword length of PURBK
 
 
  PURBK Storage Layout Top of page
 
          
*** PURBK - Minidisk Cache Purge block
*
*     +---------------------------+---------------------------+
*   0 |         PURNEXT           |         PURRDEV           |
*     +---------------------------+---------------------------+
*   8 |         PURSEXT           |         PUREEXT           |
*     +-------------+-------------+---------------------------+
*  10 |  PURHSID    |  PURTPCY    |///////////////////////////|
*     +-------------+-------------+///////////////////////////|
*  18 |///////////////////////////////////////////////////////|
*     =///////////////////////////////////////////////////////=
*     |///////////////////////////////////////////////////////|
*     +-------------------------------------------------------+
*  38
*
*** PURBK - Minidisk Cache Purge block
 
 
  PURBK Cross Reference Top of page
 
 
Symbol         Dspl Value
-------------- ---- -----
PURBYLN        0014 00000038
PURDWSZ        0014 00000007
PUREEXT        000C
PURHSID        0010
PURNEXT        0000
PURRDEV        0004
PURSEXT        0008
PURTPCY        0012
 
This information is based on z/VM 7.2.0 Last updated on 24 Jun 2020 at 09:29:49 EDT.
Copyright IBM Corporation, 1990, 2020