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