STHLF Back to Index page
 
Prolog 
Control Block Contents 
   STHLF 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.


  STHLF Prolog Top of page
 
 NAME       : HCPSTHLF
 DESCRIPTION: SUBSYSTEM TABLE HEADER BLOCK
 DSECT      : STHLF
 FUNCTION   : HCPSTHLF DESCRIBES THE SUBSYSTEM TABLE HEADER AREA
              USED BY HCPLFP TO STORE ALL INFORMATION RELATED TO
              A SIMULATED CFLF SUBSYSTEM. THERE IS ONE STH PER
              SUBSYSTEM.
 LOCATED BY : None
              CFGSTH/CFGSSID IN HCPCFGLF
 CREATED BY : None
              HCPLFCST
 DELETED BY : None
              HCPLFCST, HCPLFCRL
 SERIALIZED : CFLF CONFIGURATION LOCK.
 RELOCATION CONSIDERATIONS : None
 
 
  STHLF Control Block Content Top of page
 

 STHLF DSECT Top of page
Hex Dec Type/Val Lng Label (dup) Comments ---- ---- --------- ---- -------------- -------- 0000 0 Structure STHLF SUBSYSTEM TABLE HEADER BLOCK 0000 0 Bitstring 1 STHFLG HEADER FLAGS 0001 1 Bitstring 1 * RESERVED FOR IBM USE 0002 2 Bitstring 2 STHSSID SUBSYSTEM ID 0004 4 Address 4 STHCFG ADDRESS OF CONFIGURATION BLOCK 00000400 STHLOCKS 1024 DEFAULT SUBSYSTEM LOCK SPACE THE MAXIMUM AND CURRENT LOCK COUNTS FOR ALL PARTITIONS IS MAINTAINED SO THAT THE OUT OF/QUEUED FOR RESOURCES CONDITION CAN BE EASILY SIMULATED. 0008 8 Bitstring 2 STHMXLK MAXIMUM LOCK SPACE FOR SUBSYSTEM 000A 10 Bitstring 2 STHCRLK CURRENTLY AVAILABLE LOCK SPACE 000C 12 Bitstring 2 STHVDEV BASE DEVICE ADDRESS FOR SUBSYSTEM 000E 14 Bitstring 2 * RESERVED FOR IBM USE 00000008 STHPTNM 8 NUMBER OF PARTITIONS LIMIT 00000020 STHUSERS 32 NUMBER OF USERS LIMIT 0010 16 Bitstring 32 STHPTBL PARTITION TABLE THE MAXIMUM AND CURRENT LOCK COUNTS FOR EACH PARTITION MUST ALSO BE MAINTAINED SINCE A PARTITION CAN BE ESTABLISHED WITH LESS THAN THE TOTAL ALLOCATED LOCKS. 0010 16 Bitstring 2 STHMXLKP MAXIMUM LOCKS FOR PARTITION 0012 18 Bitstring 2 STHCRLKP IN-USE LOCKS FOR PARTITION 00000004 STHPTLN *-STHMXLKP LENGTH OF A PARTITION TABLE ENTRY 00000040 STHCNNM (4*16) MAXIMUM # CONNECTS ALLOWED 0030 48 Bitstring 1536 STHCNTB CONNECT TABLE 00000630 STHSIZE *-STHLF SIZE IN BYTES 000000C6 STHSIZ8 (*-STHLF+7)/8 SIZE IN DOUBLEWORDS
 
 
  STHLF Storage Layout Top of page
 
          
*** STHLF - SUBSYSTEM TABLE HEADER BLOCK
*
*     +------+------+-------------+---------------------------+
*   0 |STHFLG|//////|  STHSSID    |          STHCFG           |
*     +------+------+-------------+-------------+-------------+
*   8 |  STHMXLK    |  STHCRLK    |  STHVDEV    |/////////////|
*     +-------------+-------------+-------------+-------------+
*  10 |                                                       |
*     =                       STHPTBL                         =
*     |                                                       |
*     +-------------------------------------------------------+
*  30 |                                                       |
*     =                       STHCNTB                         =
*     |                                                       |
*     +-------------------------------------------------------+
* 630
*
*** STHLF - SUBSYSTEM TABLE HEADER BLOCK
          
*** Overlay for STHPTBL in STHLF
*
*     +-------------+-------------+
*  10 |  STHMXLKP   |  STHCRLKP   | 14
*     +-------------+-------------+
*
*** Overlay for STHPTBL in STHLF
 
 
  STHLF Cross Reference Top of page
 
 
Symbol         Dspl Value
-------------- ---- -----
STHCFG         0004
STHCNNM        0012 00000040
STHCNTB        0030
STHCRLK        000A
STHCRLKP       0012
STHFLG         0000
STHLOCKS       0004 00000400
STHMXLK        0008
STHMXLKP       0010
STHPTBL        0010
STHPTLN        0012 00000004
STHPTNM        000E 00000008
STHSIZE        0030 00000630
STHSIZ8        0030 000000C6
STHSSID        0002
STHUSERS       000E 00000020
STHVDEV        000C
 
This information is based on z/VM 7.2.0 Last updated on 24 Jun 2020 at 09:30:53 EDT.
Copyright IBM Corporation, 1990, 2020