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Prolog 
Control Block Contents 
   VCFBK 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.


  VCFBK Prolog Top of page
  
 NAME       : HCPVCFBK
 DESCRIPTION: Vacator Frame Block
 DSECT      : VCFBK
 FUNCTION   : A VCFBK represents one frame in a vacating zone that could
              be made available at the most recent attempt.
 LOCATED BY : VCFNEXT
              VCZVCFHD
              VCZVCFTL
 CREATED BY : HCPVAC
 DELETED BY : HCPVAC
 REFERENCES : FRMTE - Frame Table Entry
 SERIALIZED : Task serialization.  Only the Vacator, HCPVAC, operating
              on the particular zone containing the frame represented
              by this VCFBK, can mess with this VCFBK.
 RELOCATION CONSIDERATIONS : None
 COMPATIBILITY AND MIGRATION CONCERNS : None
 NOTES      :
 
 
  VCFBK Control Block Content Top of page
  




 VCFBK DSECT
Top of page


Hex   Dec Type/Val   Lng Label (dup)    Comments
---- ---- --------- ---- -------------- --------
0000    0 Structure      VCFBK          Vacator Frame Block
0000    0 Signed       4 VCFNEXT        Ptr to next VCFBK in chain
0004    4 Bitstring    1 VCFFLAGS       Flag byte
          1... ....      VCFFINUP       X'80' VCFFINUP VCFBK was built
                                        because the page could no be
                                        moved on final unpin
0005    5 Bitstring    1 * (3)          Reserved for IBM use
0008    8 Dbl-Word     8 VCFFRMTE       FRMTE represented by this block
0010   16 Signed       4 VCFPFRC        Last Process_FRMTE rc for this
                                        FRMTE
0014   20 Signed       4 *              Reserved for IBM use
0018   24 Signed       4 *              Reserved for IBM use
001C   28 Signed       4 *              Reserved for IBM use Notes : it
                                        is important that the offsets of
                                        the following count fields start
                                        at 32 (x'20') and end at 84
                                        (x'54'), to match the "failure"
                                        return codes from HCPPTEFS's
                                        getSer subroutine.
0020   32 Signed       4 VCFGENFL       Generic "failed"
0024   36 Signed       4 VCFNOST1       FRMSTEAL couldn't be obtained,
                                        available
0028   40 Signed       4 VCFNOST2       FRMSTEAL couldn't be obtained,
                                        unknown
002C   44 Signed       4 VCFNOPTE       No PTE addr in FRMPTEG
0030   48 Signed       4 VCFSPACE       Space not recognized
0034   52 Signed       4 VCFNOPTL       PTIL-s couldn't be obtained
0038   56 Signed       4 VCFNOSHD       Shadow Table Lock couldn't be
                                        obtained
003C   60 Signed       4 VCFNOSHO       SHORT couldn't be obtained
0040   64 Signed       4 VCFPROCL       On the processed list
0044   68 Signed       4 VCFPINND       Frames is pinned/locked
0048   72 Signed       4 VCFSXSTL       Couldn't get SXSSTEAL
004C   76 Signed       4 VCFLASTT       Page is Last Translated
0050   80 Signed       4 VCFNOUFL       UFOLK couldn't be obtained
0054   84 Signed       4 VCFNOAGL       Couldn't serialize Aging List
          0000000B       VCFSIZE        (*-VCFBK+7)/8 size in double
                                        words
          00000058       VCFBSIZE       VCFSIZE*8 size in bytes
 
 
  VCFBK Storage Layout Top of page
  
          
*** VCFBK - Vacator Frame Block
*
*     +---------------------------+------+--------------------+
*   0 |         VCFNEXT           |:FLAGS|////////////////////|
*     +---------------------------+------+--------------------+
*   8 |                       VCFFRMTE                        |
*     +---------------------------+---------------------------+
*  10 |         VCFPFRC           |///////////////////////////|
*     +---------------------------+---------------------------+
*  18 |///////////////////////////|///////////////////////////|
*     +---------------------------+---------------------------+
*  20 |         VCFGENFL          |         VCFNOST1          |
*     +---------------------------+---------------------------+
*  28 |         VCFNOST2          |         VCFNOPTE          |
*     +---------------------------+---------------------------+
*  30 |         VCFSPACE          |         VCFNOPTL          |
*     +---------------------------+---------------------------+
*  38 |         VCFNOSHD          |         VCFNOSHO          |
*     +---------------------------+---------------------------+
*  40 |         VCFPROCL          |         VCFPINND          |
*     +---------------------------+---------------------------+
*  48 |         VCFSXSTL          |         VCFLASTT          |
*     +---------------------------+---------------------------+
*  50 |         VCFNOUFL          |         VCFNOAGL          |
*     +---------------------------+---------------------------+
*  58
*
*** VCFBK - Vacator Frame Block
 
 
  VCFBK Cross Reference Top of page
  
 
Symbol         Dspl Value
-------------- ---- -----
VCFBSIZE       0054 00000058
VCFFINUP       0004 80
VCFFLAGS       0004
VCFFRMTE       0008
VCFGENFL       0020
VCFLASTT       004C
VCFNEXT        0000
VCFNOAGL       0054
VCFNOPTE       002C
VCFNOPTL       0034
VCFNOSHD       0038
VCFNOSHO       003C
VCFNOST1       0024
VCFNOST2       0028
VCFNOUFL       0050
VCFPFRC        0010
VCFPINND       0044
VCFPROCL       0040
VCFSIZE        0054 0000000B
VCFSPACE       0030
VCFSXSTL       0048
 
This information is based on z/VM 7.3.0 Last updated on 22 Jun 2022 at 15:57:27 EDT.
Copyright IBM Corporation, 1990, 2022