IBM: CCHREC

Programming Interface Information: This information is NOT intended to be
used as Programming Interfaces of VM/ESA. It is to be used for diagnosis only.

CCHREC

Prolog

Control Block Contents

CCHREC DSECT

Storage Layout

Cross Reference (Contains links to field and bit definitions)

CCHREC Prolog

 NAME       : CCHREC
 DESCRIPTION: VM/XA MAPPING OF THE S/370 CHANNEL
              CHECK RECORD
 DSECT      : CCHREC
 FUNCTION   : MAPS OUT THE S/370 CHANNEL CHECK RECORD
              FOR CP ERROR RECORDING MODULES.
 LOCATED BY : N/A.
 CREATED BY : S/370 or MVS GUEST.
 DELETED BY : HCPIOE AFTER HCPREC HAS COPIED IT INTO
              A GSDBK.
 COMMENTS   : VM/XA NEED ONLY TO BE ABLE TO REFERENCE THE
              AR BIT IN THIS RECORD FOR RECORDING PURPOSES.
              THUS, THE MAPPING WILL INCLUDE ONLY THOSE
              FIELDS NECESSARY.

CCHREC Control Block Content


CCHREC DSECT
Hex   Dec Type/Val   Lng Label (dup)    Comments
---- ---- --------- ---- -------------- --------
0000    0 Structure      CCHREC         VM/XA MAPPING OF THE S/370
                                        CHANNEL
0000    0 Bitstring    1 * (40)         Not needed
0028   40 Bitstring    1 CCHECF         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
0029   41 Bitstring    1 CCHSOURC       Source of error
002A   42 Bitstring    1 CCHFVF         Field validity 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
002B   43 Bitstring    1 CCHTMSEQ       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
          0000002C       CCHLEN         *-CCHREC LENGTH OF CCHREC
          00000006       CCHSIZE        (*-CCHREC+7)/8 CCHREC SIZE IN
                                        DOUBLE WORDS

CCHREC Storage Layout

*** CCHREC - VM/XA MAPPING OF THE S/370 CHANNEL
*
*     +-------------------------------------------------------+
*   0 |///////////////////////////////////////////////////////|
*     =///////////////////////////////////////////////////////=
*     |///////////////////////////////////////////////////////|
*     +------+------+------+------+---------------------------+
*  28 |CCHECF|:SOURC|CCHFVF|:TMSEQ| 2C
*     +------+------+------+------+
*
*** CCHREC - VM/XA MAPPING OF THE S/370 CHANNEL