SCHIB Back to Index page
 
Prolog 
Control Block Contents 
   SCHIB 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.


  SCHIB Prolog Top of page
  
 NAME       : HCPSCHIB
 DESCRIPTION: SUBCHANNEL INFORMATION BLOCK MAPPING
 DSECT      : SCHIB
 FUNCTION   : PROVIDE SYMOLIC REFERENCES FOR THE FIELDS OF AN XA
              SUBCHANNEL INFORMATION BLOCK (THE EXPLICIT OPERAND
              OF THE STORE SUBCHANNEL AND MODIFY SUBCHANNEL
              INSTRUCTIONS.)
 LOCATED BY : N/A
 CREATED BY : N/A
 DELETED BY : N/A
 RELOCATION CONSIDERATIONS : None
 
 
  SCHIB Control Block Content Top of page
  




 SCHIB DSECT
Top of page


Hex   Dec Type/Val   Lng Label (dup)    Comments
---- ---- --------- ---- -------------- --------
0000    0 Structure      SCHIB          SUBCHANNEL INFORMATION BLOCK MAPPING
0000    0 Bitstring   28 SCHPMCW (0)    PATH MANAGEMENT CONTROL WORD
0000    0 Signed       4 SCHINTP        INTERRUPTION PARAMETER
0004    4 Signed       4 SCHPMW1 (0)    PMCW WORD-1
0004    4 Bitstring    1 SCHIRCF        INTERRUPTION REQUEST CODE
          ..11 1...      CSWIRC         X'38' CSWIRC INTERRUPTION
                                        SUBCLASS EXTRACT MASK
          1... ....      CSWQDIO        X'80' CSWQDIO QDIO Facility (Q)
                                        Available
          .... .1..      CSWIOINC       X'04' CSWIOINC I/O Initiation
                                        Control bit
          .... ..1.      CSWHDVA        X'02' CSWHDVA HALT DEVICE (HDV)
                                        Assist Control bit
          .... ...1      CSWABC         X'01' CSWABC ALTERNATE BLOCK
                                        CONTROL BIT
          1... ....      CSWPATH        X'80' CSWPATH MODEL DEPENDENT
                                        PATH FOR MSG SUBCHANL
          ..11 111.      CSWMSV         X'3E' CSWMSV MESSAGE SUBCHANNEL
                                        VALID BITS
          .1.. ....      CSWMINS        X'40' CSWMINS MESSAGE DEVICE MAY
                                        BE INSTALLED
0005    5 Bitstring    1 SCHCTL         CONTROL FLAGS
0006    6 Signed       2 SCHDEV         DEVICE NUMBER
0008    8 Signed       4 SCHPMW2 (0)    WORD 2 OF PMCW
0008    8 Bitstring    1 SCHLPM         LOGICAL PATH MASK
0009    9 Bitstring    1 SCHPNOM        PATH NOT OPERATIONAL MASK
000A   10 Bitstring    1 SCHLPUM        LAST PATH USED MASK
000B   11 Bitstring    1 SCHPIM         PATH INSTALLED MASK
000C   12 Signed       2 SCHMBI         MEASUREMENT BLOCK INDEX
000E   14 Bitstring    1 SCHPOM         PATH OPERATIONAL MASK
000F   15 Bitstring    1 SCHPAM         PATH AVAILABLE MASK
0010   16 Bitstring    8 SCHCPIDS (0)   ARRAY OF CHANNEL PATH IDS
0010   16 Bitstring    1 SCHCPID0       CHANNEL PATH IDENTIFIER 0
0011   17 Bitstring    1 SCHCPID1       CHANNEL PATH IDENTIFIER 1
0012   18 Bitstring    1 SCHCPID2       CHANNEL PATH IDENTIFIER 2
0013   19 Bitstring    1 SCHCPID3       CHANNEL PATH IDENTIFIER 3
0014   20 Bitstring    1 SCHCPID4       CHANNEL PATH IDENTIFIER 4
0015   21 Bitstring    1 SCHCPID5       CHANNEL PATH IDENTIFIER 5
0016   22 Bitstring    1 SCHCPID6       CHANNEL PATH IDENTIFIER 6
0017   23 Bitstring    1 SCHCPID7       CHANNEL PATH IDENTIFIER 7
0018   24 Signed       4 SCHWORD6 (0)   PMCW WORD 6
0018   24 Bitstring    1 SCHZONE        ZONE
0019   25 Bitstring    1 SCHVISC        GUEST ISC - 00000V-ISC
001A   26 Bitstring    1 *              RESERVED
001B   27 Bitstring    1 SCHECFG        EXTENDED CONTROL FLAGS I0000FXS
001C   28 Bitstring   12 SCHSCSW (0)    SCSW CONTAINED IN SCHIB
001C   28 Bitstring    4 SCHKEYSC (0)   FIRST WORD OF SCSW
001C   28 Bitstring    1 SCHKEYCC       KEY AND CONDITION CODE
001D   29 Bitstring    1 SCHFPIZN       FORMAT AND INITIAL STATUS
001E   30 Bitstring    1 SCHFCTL        FUNCTION CONTROL
001F   31 Bitstring    1 SCHACTL        ACTIVITY CONTROL
0020   32 Signed       4 SCHCCWA        Absolute CCW address.
0024   36 Bitstring    1 SCHDVST        DEVICE STATUS
0025   37 Bitstring    1 SCHSCST        SUBCHANNEL STATUS
0026   38 Signed       2 SCHCNT         RESIDUAL COUNT
0028   40 Bitstring   12 SCHMDA (0)
0028   40 Signed       4 * (3)          MACHINE DEPENDENT AREA
0028   40 Dbl-Word     8 SCHMBADR (0)   Measurement block address
0028   40 Signed       4 SCHMBAH        High order word meas. block addr
002C   44 Signed       4 SCHMBAL        Low order word meas. block addr
          ..1. 11..      SCHMBAO        SCHMBAL SCHMBAO 390 measurement
                                        block address
0030   48 Signed       4 SCHMDA2        Machine dependent area
          00000034       SCHBLEN        *-SCHIB SIZE OF A SCHIB IN BYTES
          00000007       SCHSIZE        (*-SCHIB+7)/8 SIZE OF A SCHIB IN
                                        DOUBLEWORDS
 
 
  SCHIB Storage Layout Top of page
  
          
*** SCHIB - SUBCHANNEL INFORMATION BLOCK MAPPING
*
*     +---------------------------+------+------+-------------+
*   0 |         SCHINTP           |:IRCF |SCHCTL|   SCHDEV    |
*     +------+------+------+------+------+------+------+------+
*   8 |SCHLPM|:PNOM |:LPUM |SCHPIM|   SCHMBI    |SCHPOM|SCHPAM|
*     +------+------+------+------+------+------+------+------+
*  10 |:CPID0|:CPID1|:CPID2|:CPID3|:CPID4|:CPID5|:CPID6|:CPID7|
*     +------+------+------+------+------+------+------+------+
*  18 |:ZONE |:VISC |//////|:ECFG |:KEYCC|:FPIZN|:FCTL |:ACTL |
*     +------+------+------+------+------+------+------+------+
*  20 |         SCHCCWA           |:DVST |:SCST |   SCHCNT    |
*     +---------------------------+------+------+-------------+
*  28 |///////////////////////////////////////////////////////|
*     |///////////////////////////+---------------------------+
*     |///////////////////////////| 34
*     +---------------------------+
*
*** SCHIB - SUBCHANNEL INFORMATION BLOCK MAPPING
          
*** Overlay for SCHMDA in SCHIB
*
*     +---------------------------+---------------------------+
*  28 |         SCHMBAH           |         SCHMBAL           |
*     +---------------------------+---------------------------+
*  30 |         SCHMDA2           | 34
*     +---------------------------+
*
*** Overlay for SCHMDA in SCHIB
 
 
  SCHIB Cross Reference Top of page
  
 
Symbol         Dspl Value
-------------- ---- -----
CSWABC         0004 01
CSWHDVA        0004 02
CSWIOINC       0004 04
CSWIRC         0004 38
CSWMINS        0004 40
CSWMSV         0004 3E
CSWPATH        0004 80
CSWQDIO        0004 80
SCHACTL        001F
SCHBLEN        0030 00000034
SCHCCWA        0020
SCHCNT         0026
SCHCPIDS       0010
SCHCPID0       0010
SCHCPID1       0011
SCHCPID2       0012
SCHCPID3       0013
SCHCPID4       0014
SCHCPID5       0015
SCHCPID6       0016
SCHCPID7       0017
SCHCTL         0005
SCHDEV         0006
SCHDVST        0024
SCHECFG        001B
SCHFCTL        001E
SCHFPIZN       001D
SCHINTP        0000
SCHIRCF        0004
SCHKEYCC       001C
SCHKEYSC       001C
SCHLPM         0008
SCHLPUM        000A
SCHMBADR       0028
SCHMBAH        0028
SCHMBAL        002C
SCHMBAO        002C 2C
SCHMBI         000C
SCHMDA         0028
SCHMDA2        0030
SCHPAM         000F
SCHPIM         000B
SCHPMCW        0000
SCHPMW1        0004
SCHPMW2        0008
SCHPNOM        0009
SCHPOM         000E
SCHSCST        0025
SCHSCSW        001C
SCHSIZE        0030 00000007
SCHVISC        0019
SCHWORD6       0018
SCHZONE        0018
 
This information is based on z/VM 7.3.0 Last updated on 22 Jun 2022 at 15:54:47 EDT.
Copyright IBM Corporation, 1990, 2022