ACPBK Back to Index page
 
Prolog 
Control Block Contents 
   ACPBK 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.


  ACPBK Prolog Top of page
 
 NAME       : HCPACPBK
 DESCRIPTION: CP Access Pointer Block
 DSECT      : ACPBK
 FUNCTION   : The ACPBK contains pointers to the ACSBK
              blocks.
 LOCATED BY : SYSCM.SYSACPBK
 CREATED BY : Initialization
 DELETED BY : None
 RELOCATION CONSIDERATIONS : None
 
 
  ACPBK Control Block Content Top of page
 

 ACPBK DSECT Top of page
Hex Dec Type/Val Lng Label (dup) Comments ---- ---- --------- ---- -------------- -------- 0000 0 Structure ACPBK CP Access Pointer Block 0000 0 Address 4 * Reserved 0004 4 Address 4 * Reserved 0008 8 Signed 2 ACPMAX Max number of subscripted entries 000A 10 Signed 2 ACPCCWN Count of d-words for CCW building 000C 12 Address 4 ACPINACC Pointer to ACCBK for init access 0010 16 Address 4 ACPVMDBK Pointer to VMDBK owning VDEVs 0014 20 Address 4 * Reserved 0018 24 Bitstring 1 ACPBKV (0) Start of variable length data The following is subscripted (1:ACPMAX) 0018 24 Dbl-Word 8 ACPACCLK (3) Lockword to serialize chains 0030 48 Dbl-Word 8 * Reserved 0038 56 Signed 4 * Reserved 003C 60 Address 4 ACPACSA Pointer to HCPACSBK 00000028 ACPACSAL *-ACPACCLK Length of each entry Length of ACPBK in dwords 00000085 ACPBKSZD ((ACPACSAL*ACPFMMAX)+(ACPBKV-ACPB K)+7)/8 0000001A ACPFMMAX 26 Maximum number of entries
 
 
  ACPBK Storage Layout Top of page
 
          
*** ACPBK - CP Access Pointer Block
*
*     +---------------------------+---------------------------+
*   0 |///////////////////////////|///////////////////////////|
*     +-------------+-------------+---------------------------+
*   8 |   ACPMAX    |  ACPCCWN    |         ACPINACC          |
*     +-------------+-------------+---------------------------+
*  10 |         ACPVMDBK          |///////////////////////////|
*     +---------------------------+---------------------------+
*
*** ACPBK - CP Access Pointer Block
          
*** Overlay for ACPBKV in ACPBK
*
*     +-------------------------------------------------------+
*  18 |                                                       |
*     =                       ACPACCLK                        =
*     |                                                       |
*     +-------------------------------------------------------+
*  30 |///////////////////////////////////////////////////////|
*     +---------------------------+---------------------------+
*  38 |///////////////////////////|         ACPACSA           |
*     +---------------------------+---------------------------+
*  40
*
*** Overlay for ACPBKV in ACPBK
 
 
  ACPBK Cross Reference Top of page
 
 
Symbol         Dspl Value
-------------- ---- -----
ACPACCLK       0018
ACPACSA        003C
ACPACSAL       003C 00000028
ACPBKSZD       003C 00000085
ACPBKV         0018
ACPCCWN        000A
ACPFMMAX       003C 0000001A
ACPINACC       000C
ACPMAX         0008
ACPVMDBK       0010
 
This information is based on z/VM 7.2.0 Last updated on 24 Jun 2020 at 09:26:46 EDT.
Copyright IBM Corporation, 1990, 2020