PFMBK Back to Index page
 
Prolog 
Control Block Contents 
   PFMBK 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.


  PFMBK Prolog Top of page
 
 NAME       : HCPPFMBK
 DESCRIPTION: PAGEABLE FREE MANAGMENT BLOCK
 DSECT      : PFMBK
 FUNCTION   : A PAGEABLEFREE MANAGMENT BLOCK DESCIBES
              UNALLOCATED PAGEABLE FREE STORAGE
 LOCATED BY : HCPRSMPF  8 QUEUES OF PAGEABLE FREE STORAGE
 CREATED BY : HCPPFMAL  BLOCKS CREATED WHEN PAGEABLE FREE STORAGE
              IS CREATED
              HCPPFMDE  BLOCKS CREATED WHEN PAGEABLE FREE STORAGE
              IS RELEASED AND NO PFMBK EXISTS
 DELETED BY : HCPPFM
 RELOCATION CONSIDERATIONS : None
 
 
  PFMBK Control Block Content Top of page
 

 PFMBK DSECT Top of page
Hex Dec Type/Val Lng Label (dup) Comments ---- ---- --------- ---- -------------- -------- 0000 0 Structure PFMBK PAGEABLE FREE MANAGMENT BLOCK 0000 0 Signed 4 PFMFPNT POITER TO NEXT PFMBK 0004 4 Signed 4 PFMVADD VIRTUAL ADDRESS OF THIS PAGE 0008 8 Signed 2 PFMACNT COUNT OF UNALLOCATED BLOCKS 000A 10 Signed 2 PFMTCNT MAXIMUM AVAILABLE BLOCKS IN THIS PAGE 000C 12 Bitstring 1 PFMFLAG 1... .... PFMERROR X'80' PFMERROR TRANSLATION ERROR ON PAGE 000D 13 Bitstring 3 * RESERVED FOR FUTURE IBM USE 0010 16 Bitstring 16 PFMEL 1ST BLOCK NUMBER AVAILABLE 0010 16 Bitstring 1 PFMX1 0011 17 Bitstring 15 * 0010 16 Bitstring 15 PFMEL0 1ST BLOCK NUMBER AVAILABLE 0010 16 Bitstring 1 * 0011 17 Bitstring 15 PFMEL1 REMAINING BLOCK NUMBERS AVAILABLE 00000004 PFMSIZE (*-PFMFPNT+7)/8 LENGTH OF PAGEABLE FREE STORAGE BLOCK IN DOUBLEWORDS
 
 
  PFMBK Storage Layout Top of page
 
 
*** PFMBK - PAGEABLE FREE MANAGMENT BLOCK
*
*     +---------------------------+---------------------------+
*   0 |         PFMFPNT           |         PFMVADD           |
*     +-------------+-------------+------+--------------------+
*   8 |  PFMACNT    |  PFMTCNT    |:FLAG |////////////////////|
*     +-------------+-------------+------+--------------------+
*  10 |                        PFMEL                          |
*     |                                                       |
*     +-------------------------------------------------------+
*  20
*
*** PFMBK - PAGEABLE FREE MANAGMENT BLOCK
 
*** Overlay for PFMEL in PFMBK
*
*     +------+------------------------------------------------+
*  10 |PFMX1 |////////////////////////////////////////////////|
*     +------+////////////////////////////////////////////////|
*     |///////////////////////////////////////////////////////|
*     +-------------------------------------------------------+
*  20
*
*** Overlay for PFMEL in PFMBK
 
*** Overlay for PFMEL in PFMBK
*
*     +-------------------------------------------------------+
*  10 |                        PFMEL0                         |
*     |                                                +------+
*     |                                                | 1F
*     +------------------------------------------------+
*
*** Overlay for PFMEL in PFMBK
 
*** Overlay for PFMEL in PFMBK
*
*     +------+------------------------------------------------+
*  10 |//////|                    PFMEL1                      |
*     +------+                                                |
*     |                                                       |
*     +-------------------------------------------------------+
*  20
*
*** Overlay for PFMEL in PFMBK
 
 
  PFMBK Cross Reference Top of page
 
 
Symbol         Dspl Value
-------------- ---- -----
PFMACNT        0008
PFMEL          0010
PFMEL0         0010
PFMEL1         0011
PFMERROR       000C 80
PFMFLAG        000C
PFMFPNT        0000
PFMSIZE        0011 00000004
PFMTCNT        000A
PFMVADD        0004
PFMX1          0010
 
This information is based on z/VM 6.4.0 Last updated on 24 Aug 2016 at 09:41:48 EDT.
Copyright IBM Corporation, 1990, 2016