Programming Interface Information: This information is NOT intended to be
used as Programming Interfaces of z/VM.

IRBLK

Prolog  

Control Block Contents  
   IRBLK DSECT

Storage Layout  

Cross Reference (Contains links to field and bit definitions)  


IRBLK Prolog

 NAME       : HCPIRBLK
 DESCRIPTION: INTERRUPTION RESPONSE BLOCK MAPPING
 DSECT      : IRBLK
 FUNCTION   : PROVIDE SYMOLIC REFERENCES FOR THE FIELDS RETURNED
              BY AN XA MACHINE IN RESPONSE TO A TSCH INSTRUCTION THAT
              SETS CONDITION CODE ZERO.
 LOCATED BY : N/A
 CREATED BY : N/A
 DELETED BY : N/A

 

IRBLK Control Block Content


IRBLK DSECT

Hex   Dec Type/Val   Lng Label (dup)    Comments
---- ---- --------- ---- -------------- --------
0000    0 Structure      IRBLK          INTERRUPTION RESPONSE BLOCK
                                        MAPPING
0000    0 Bitstring   12 IRBSCSW (0)    EXTENDED STATUS CSW
0000    0 Signed       4 IRBWORD1 (0)   IRB WORD-1
0000    0 Bitstring    1 IRBSKEY        KEY, EXTENDED STATUS AND DEFERRED
                                        CC
          1111 ....      CSWKEY         X'F0' KEY OF I/O OPERATION (0-15)
          .... 1...      CSWSRENA       X'08' SUSPEND-RESUME ENABLEMENT
                                        ORB only fields
          .... .1..      CSWSMCTL       X'04' Streaming Mode Cntrl(ORB
                                        Word 1,Bit 5)
          .... ..1.      CSWMODCT       X'02' Modification Control(ORB
                                        Word 1,Bit 6)
          .... ...1      CSWSYNCH       X'01' Synchronize Control (ORB
                                        Word 1,Bit 7) IRB only fields
          .... .1..      CSWESTAT       X'04' 1=EXTENDED STATUS, 0=TIME
          .... ..11      CSWDFCC        X'03' DEFERRED CC EXTRACT MASK
          .... ....      CSWCC0         X'00' DEFERRED CC CODE 0
          .... ...1      CSWCC1         X'01' DEFERRED CC CODE 1
          .... ..1.      CSWCC2         X'02' DEFERRED CC CODE 2
          .... ..11      CSWCC3         X'03' DEFERRED CC CODE 3
0001    1 Bitstring    1 IRBFPIZN       CCW CONTROLS AND INITIAL
                                        RESPONSES
          1111 1...      CSWSUMRY       X'F8' Summary test field. These
                                        bits will appear in .both the ORB
                                        and IRB
          1111 1.11      CSWMESUM       X'FB' ESAME mode summary test
                                        field. This mask .includes bits
                                        that only appear .in the ORB
          1... ....      CSWFORMT       X'80' FORMAT OF CCW
          .1.. ....      CSWPREF        X'40' UNLIMITED PREFETCH ALLOWED.
          ..1. ....      CSWRESPN       X'20' INITIAL STATUS RESPONSE
                                        PRESENTED
          ...1 ....      CSWLMODE       X'10' ADDRESS LIMIT IS IN EFFECT
          .... 1...      CSWSUPSI       X'08' SUPPRESS SUSPENDED
                                        INTERRUPTION
          .... ..1.      CSWF2IDA       X'02' ORB "H" bit - Format-2 IDAW
                                        control: when set, Format-2
                                        (64-bit/31-bit data address,
                                        representing 4K of data) IDAWs
                                        are provided for all channel
                                        commands of the designated
                                        channel program which have the
                                        Indirect Data Addressing flag set
                                        to one.
          .... ...1      CSW2KIDA       X'01' ORB "T" bit - only
                                        meaningful if the Format-2 bit(H)
                                        is set. 64 bit/31 bit data
                                        addresses are used, however data
                                        is moved in 2K blocks per IDAW.
          .... .1..      CSWZCC         X'04' CONFIRMED ZERO CONDITION
                                        CODE
          .... ..1.      CSWELOG        X'02' EXTENDED I/O LOGOUT STORED
          .... ...1      CSWPNOPR       X'01' NOT-OPERATION PATH
                                        ENCOUNTERED
0002    2 Bitstring    1 IRBFCTL        FUNCTION CONTROL BYTE
          1... ....      CSWQDIOA       X'80' QDIO-Active (V)
          .1.. ....      CSWSFCN        X'40' START SUBCHANNEL FUNCTION
          ..1. ....      CSWHFCN        X'20' HALT SUBCHANNEL FUNCTION
          ...1 ....      CSWCFCN        X'10' CLEAR SUBCHANNEL FUNCTION
          .... 1...      CSWRPND        X'08' RESUME SUBCHANNEL PENDING
          .... .1..      CSWSPND        X'04' START SUBCHANNEL PENDING
          .... ..1.      CSWHPND        X'02' HALT SUBCHANNEL PENDING
          .... ...1      CSWCPND        X'01' CLEAR SUBCHANNEL PENDING
0003    3 Bitstring    1 IRBACTL        ACTIVITY CONTROL BYTE
          1... ....      CSWSCACT       X'80' SUBCHANNEL ACTIVE
          .1.. ....      CSWDVACT       X'40' DEVICE ACTIVE
          ..1. ....      CSWSUSPN       X'20' SUBCHANNEL SUSPENDED
          ...1 ....      CSWALERT       X'10' ALERT STATUS
          .... 1...      CSWISTAT       X'08' INTERMEDIATE STATUS
          .... .1..      CSWPSTAT       X'04' PRIMARY STATUS
          .... ..1.      CSWNSTAT       X'02' SECONDARY STATUS
          .... ...1      CSWSTPND       X'01' STATUS PENDING
0004    4 Signed       4 IRBCCWA        ADDRESS OF CCW AT INTERRUPT (+8)
0008    8 Bitstring    4 IRBCSC (0)     COMBINED DEVICE STATUS,
                                        SUBCHANNEL STATUS, AND RESIDUAL
                                        COUNT FIELDS
0008    8 Bitstring    1 IRBDVST        DEVICE STATUS FLAGS
          1... ....      CSWATTN        X'80' ATTENTION
          .1.. ....      CSWSM          X'40' STATUS MODIFIER
          ..1. ....      CSWCUE         X'20' CONTROL UNIT END
          ...1 ....      CSWBUSY        X'10' BUSY
          .... 1...      CSWCE          X'08' CHANNEL END
          .... .1..      CSWDE          X'04' DEVICE END
          .... ..1.      CSWUC          X'02' UNIT CHECK
          .... ...1      CSWUE          X'01' UNIT EXCEPTION
          .... 11..      CSWCEDE        X'0C' CHANNEL END AND DEVICE END
          ..1. 11..      CSWCEDC        X'2C' CHANNEL END,DEVICE END,AND
                                        CUE
          .1.1 ....      CSWSMBSY       X'50' CONTROL UNIT BUSY
          .111 ....      CSWCBS         X'70' CONTROL UNIT BUSY AND END
          1... .1..      CSWDEA         X'84' DEVICE END AND ATTENTION
0009    9 Bitstring    1 IRBSCST        SUBCHANNEL STATUS FLAGS
          1... ....      CSWPCI         X'80' PROGRAM CONTROLLED
                                        INTERRUPTION
          .1.. ....      CSWIL          X'40' INCORRECT LENGTH INDICATION
          ..1. ....      CSWPRG         X'20' CHANNEL PROGRAM CHECK
          ...1 ....      CSWPROT        X'10' STORAGE PROTECTION CHECK
          .... 1...      CSWCDC         X'08' CHANNEL DATA CHECK
          .... .1..      CSWCCC         X'04' CHANNEL CONTROL CHECK
          .... ..1.      CSWIFCC        X'02' INTERFACE CONTROL CHECK
          .... ...1      CSWCHC         X'01' CHANNEL CHAINING CHECK
          .... 111.      CSWHCE         X'0E' CDC+CCC+IFCC HARDWARE
                                        ERRORS
          ..11 ...1      CSWPCE         X'31' PRG+CHC+PROT PROGRAM ERRORS
000A   10 Signed       2 IRBCNT         UNEXPIRED COUNT IN CCW
000C   12 Signed       4 IRBXSTAT (0)   EXTENDED STATUS/TIME WORD
000C   12 Bitstring    1 IRBECF         CHANNEL PROGRAM ERROR CHECK FLAGS
          .1.. ....      CSWKEYCK       X'40' INVALID CBC ON STORAGE KEY
          ..1. ....      CSWMBPCK       X'20' ADDRESSING EXCEPTION ON MBI
          ...1 ....      CSWMBDCK       X'10' INVALID CBC ON MEASURE
                                        BLOCK
          .... 1...      CSWMBACK       X'08' ACCESS EXCEPTION OF MEASURE
                                        BLK
          .... .1..      CSWCCWCK       X'04' INVALID CBC ON CCW FIELDS
          .... ..1.      CSWIDACK       X'02' INVALID CBC ON IDAL FIELDS
          .... ...1      CSWSALCK       X'01' INVALID ADDRESS LIMIT SET
000D   13 Bitstring    1 IRBLPUM        LAST-PATH-USED MASK
          .... 11.1      IRBCPID        IRBLPUM *** TEMPORARY UNTIL CODE
                                        CHANGE ***
000E   14 Signed       2 IRBDCTI (0)    DEVICE CONNECT TIME INTERVAL
000E   14 Bitstring    1 IRBFVF         TERMINATION CODE VALIDATION BITS
          1... ....      CSWFVFAR       X'80' Ancillary report bit in the
                                        ESW
          .1.. ....      CSWFVFLP       X'40' LAST-PATH-USED IS VALID
          ..1. ....      CSWFVFTC       X'20' TERMINATION CODE IS VALID
          ...1 ....      CSWFVFSC       X'10' SEQUENCE CODE IS VALID
          .... 1...      CSWFVFDS       X'08' DEVICE STATUS IS VALID
          .... .1..      CSWFVFCA       X'04' CCW ADDRESS IS VALID
          .... ..11      CSWSACOD       X'03' STORAGE ACCESS CODE:
          .... ....      CSWSAUNK       X'00' 00 - UNKNOWN TYPE
          .... ...1      CSWSARD        X'01' 01 - READ
          .... ..1.      CSWSAWRT       X'02' 02 - WRITE
          .... ..11      CSWSARDB       X'03' 03 - READ BACKWARDS
          .... ..1.      CSWFVFCN       X'02' S/370-ONLY: CHANNEL # VALID
          .... ...1      CSWFVFDN       X'01' S/370-ONLY: DEVICE # VALID
          ...1 11..      CSWFVFCM       CSWFVFSC+CSWFVFDS+CSWFVFCA common
                                        fields
000F   15 Bitstring    1 IRBTMSEQ       TERMINATION,ALERT AND SEQUENCE
                                        CODES
          11.. ....      CSWTMCOD       X'C0' TERMINATION CODE :
          .... ....      CSWTMCID       X'00' 00 - INTERFACE DISCONNECT
          .1.. ....      CSWTMCST       X'40' 01 - STOP, STACK, NORMAL
                                        TERM
          1... ....      CSWTMCSR       X'80' 10 - SELECTIVE RESET
          11.. ....      CSWTMXXX       X'C0' 11 - RESERVED
          ..1. ....      CSWLCLAR       X'20' Ancillary report bit in the
                                        limited channel logout area
          ...1 ....      CSWSECER       X'10' SECONDARY ERROR
          .... 1...      CSWEALRT       X'08' LOGOUT IS FROM I/O ERROR
                                        ALERT
          .... .111      CSWSQCOD       X'07' SEQUENCE CODE :
          .... ....      CSWSQXXX       X'00' 000 - RESERVED
          .... ...1      CSWSQCOA       X'01' 001 - COMMAND-OUT &
                                        ADDRESS-IN
          .... ..1.      CSWSQCAC       X'02' 010 - COMMAND ACCEPTED
          .... ..11      CSWSQDTR       X'03' 011 - DATA TRANSFERRED
          .... .1..      CSWSQCNA       X'04' 100 - COMMAND NOT ACCEPTED
          .... .1.1      CSWSQCAQ       X'05' 101 - COMMAND ACCEPTED BUT
                                        DATA TRANSFER UNKNOWN
          .... .11.      CSWSQYYY       X'06' 110 - RESERVED
          .... .111      CSWSQZZZ       X'07' 111 - RESERVED
0010   16 Signed       4 IRBERW (0)     Extended Report Word for Format 0
                                        ESW
0010   16 Bitstring    1 IRBERWB0       ERW Byte 0
          .... 1...      CSWPVRQ        X'08' Path verification required
          .... ...1      CSWERWCS       X'01' Sense data stored in
                                        extended control word
0011   17 Bitstring    1 IRBERWB1       ERW Byte 1
          1... ....      CSW2CCWV       X'80' Secondary CCW address
                                        validity bit
          .1.. ....      CSWFSAFM       X'40' Failing storage address
                                        Format =1 Indicates format-2 addr
                                        =0 Indicates format-1 addr
          ..11 1111      CSWCSCNT       X'3F' Concurrent Sense Count
                                        extract mask
0012   18 Bitstring    1 * (2)          Reserved for future hardware use
0014   20 Signed       4 *              RESERVED FOR FUTURE HARDWARE USE
0018   24 Signed       4 *              RESERVED FOR FUTURE HARDWARE USE
001C   28 Signed       4 IRB2DCCW       Secondary CCW address
          00000020       IRBLEN         (*-IRBLK) LENGTH OF THE IRB
                                        WITHOUT XLOGOUT
0020   32 Bitstring   32 IRBXTLOG       EXTENDED LOGOUT INFORMATION
          00000040       IRBLENG        (*-IRBLK) LENGTH OF ARCHITECTED
                                        IRB IN BYTES
          00000008       IRBSIZE        (IRBLENG+7)/8 SIZE IN BYTES FOR
                                        CP ALLOCATION
0000    0 Bitstring    1 IRBDKEY        CHSC Subchannel CRQBK Storage Key
0001    1 Bitstring    1 *
0002    2 Bitstring    2 IRBDFASC (0)   FCTL (BIT 17-19) ACTL (BIT 20-26)
0002    2 Bitstring    1 IRBDFCTL
0003    3 Bitstring    1 IRBDACTL
0004    4 Bitstring    4 IRBDCRQ        Address of Communication Request
                                        BLK
0008    8 Bitstring    1 *
0009    9 Bitstring    1 IRBDSC         CHSC Status Control
000A   10 Bitstring    2 *

 

IRBLK Storage Layout

          
*** IRBLK - INTERRUPTION RESPONSE BLOCK MAPPING
*
*     +------+------+------+------+---------------------------+
*   0 |:SKEY |:FPIZN|:FCTL |:ACTL |         IRBCCWA           |
*     +------+------+------+------+------+------+------+------+
*   8 |:DVST |:SCST |   IRBCNT    |IRBECF|:LPUM |IRBFVF|:TMSEQ|
*     +------+------+-------------+------+------+------+------+
*  10 |:ERWB0|:ERWB1|/////////////|///////////////////////////|
*     +------+------+-------------+---------------------------+
*  18 |///////////////////////////|         IRB2DCCW          |
*     +---------------------------+---------------------------+
*  20 |                                                       |
*     =                       IRBXTLOG                        =
*     |                                                       |
*     +-------------------------------------------------------+
*  40
*
*** IRBLK - INTERRUPTION RESPONSE BLOCK MAPPING
          
*** Overlay for IRBSCSW in IRBLK
*
*     +------+------+------+------+---------------------------+
*   0 |:DKEY |//////|:DFCTL|:DACTL|         IRBDCRQ           |
*     +------+------+------+------+---------------------------+
*   8 |//////|IRBDSC|/////////////| C
*     +------+------+-------------+
*
*** Overlay for IRBSCSW in IRBLK

 

IRBLK Cross Reference

Symbol         Dspl Value
-------------- ---- -----
CSWALERT       0003 10
CSWATTN        0008 80
CSWBUSY        0008 10
CSWCBS         0008 70
CSWCCC         0009 04
CSWCCWCK       000C 04
CSWCC0         0000 00
CSWCC1         0000 01
CSWCC2         0000 02
CSWCC3         0000 03
CSWCDC         0009 08
CSWCE          0008 08
CSWCEDC        0008 2C
CSWCEDE        0008 0C
CSWCFCN        0002 10
CSWCHC         0009 01
CSWCPND        0002 01
CSWCSCNT       0011 3F
CSWCUE         0008 20
CSWDE          0008 04
CSWDEA         0008 84
CSWDFCC        0000 03
CSWDVACT       0003 40
CSWEALRT       000F 08
CSWELOG        0001 02
CSWERWCS       0010 01
CSWESTAT       0000 04
CSWFORMT       0001 80
CSWFSAFM       0011 40
CSWFVFAR       000E 80
CSWFVFCA       000E 04
CSWFVFCM       000E 1C
CSWFVFCN       000E 02
CSWFVFDN       000E 01
CSWFVFDS       000E 08
CSWFVFLP       000E 40
CSWFVFSC       000E 10
CSWFVFTC       000E 20
CSWF2IDA       0001 02
CSWHCE         0009 0E
CSWHFCN        0002 20
CSWHPND        0002 02
CSWIDACK       000C 02
CSWIFCC        0009 02
CSWIL          0009 40
CSWISTAT       0003 08
CSWKEY         0000 F0
CSWKEYCK       000C 40
CSWLCLAR       000F 20
CSWLMODE       0001 10
CSWMBACK       000C 08
CSWMBDCK       000C 10
CSWMBPCK       000C 20
CSWMESUM       0001 FB
CSWMODCT       0000 02
CSWNSTAT       0003 02
CSWPCE         0009 31
CSWPCI         0009 80
CSWPNOPR       0001 01
CSWPREF        0001 40
CSWPRG         0009 20
CSWPROT        0009 10
CSWPSTAT       0003 04
CSWPVRQ        0010 08
CSWQDIOA       0002 80
CSWRESPN       0001 20
CSWRPND        0002 08
CSWSACOD       000E 03
CSWSALCK       000C 01
CSWSARD        000E 01
CSWSARDB       000E 03
CSWSAUNK       000E 00
CSWSAWRT       000E 02
CSWSCACT       0003 80
CSWSECER       000F 10
CSWSFCN        0002 40
CSWSM          0008 40
CSWSMBSY       0008 50
CSWSMCTL       0000 04
CSWSPND        0002 04
CSWSQCAC       000F 02
CSWSQCAQ       000F 05
CSWSQCNA       000F 04
CSWSQCOA       000F 01
CSWSQCOD       000F 07
CSWSQDTR       000F 03
CSWSQXXX       000F 00
CSWSQYYY       000F 06
CSWSQZZZ       000F 07
CSWSRENA       0000 08
CSWSTPND       0003 01
CSWSUMRY       0001 F8
CSWSUPSI       0001 08
CSWSUSPN       0003 20
CSWSYNCH       0000 01
CSWTMCID       000F 00
CSWTMCOD       000F C0
CSWTMCSR       000F 80
CSWTMCST       000F 40
CSWTMXXX       000F C0
CSWUC          0008 02
CSWUE          0008 01
CSWZCC         0001 04
CSW2CCWV       0011 80
CSW2KIDA       0001 01
IRBACTL        0003
IRBCCWA        0004
IRBCNT         000A
IRBCPID        000D 0D
IRBCSC         0008
IRBDACTL       0003
IRBDCRQ        0004
IRBDCTI        000E
IRBDFASC       0002
IRBDFCTL       0002
IRBDKEY        0000
IRBDSC         0009
IRBDVST        0008
IRBECF         000C
IRBERW         0010
IRBERWB0       0010
IRBERWB1       0011
IRBFCTL        0002
IRBFPIZN       0001
IRBFVF         000E
IRBLEN         001C 00000020
IRBLENG        0020 00000040
IRBLPUM        000D
IRBSCST        0009
IRBSCSW        0000
IRBSIZE        0020 00000008
IRBSKEY        0000
IRBTMSEQ       000F
IRBWORD1       0000
IRBXSTAT       000C
IRBXTLOG       0020
IRB2DCCW       001C

This information is based on z/VM V4R1.0.
Last updated on 5 Jun 2001 at 13:59:59 EDT.
Copyright IBM Corporation, 1990, 2001