CFEBK

Prolog  

Control Block Contents  
   CFEBK DSECT

Storage Layout  

Cross Reference (Contains links to field and bit definitions)  

CFEBK Prolog

 Name       : HCPCFEBK
 Description: Map the HCPIODCW resident data area
 DSECT      : CFEBK
 Function   : Map system variables used for I/O.
 Located by : HCPIODcw
 Created by : HCPIIOcw
 Deleted by : none
 General Comm nts.
              - The variables are hard coded in HCPIODCW, (no longer
              dynamically set during initialization.)
              - We use the address X'8FFFFFxx' because z/Architecture
              guarantees that bit 0 in the CCW data address
              will be checked late (at data access time).

CFEBK Control Block Content

CFEBK DSECT

Hex   Dec Type/Val   Lng Label (dup)    Comments
---- ---- --------- ---- -------------- --------
0000    0 Structure      CFEBK          Map the HCPIODCW resident data
                                        area
                          CP-Forced program check
0000    0 Signed       4 CFEPRGAD       X'8FFFFF02'
                          CP-Forced protection check
0004    4 Signed       4 CFEPRTAD       X'8FFFFF04'
                          CP-Forced interface control check
0008    8 Signed       4 CFEIFCAD       X'8FFFFF06'
                          CP-Forced incorrect length
000C   12 Signed       4 CFEICLAD       X'8FFFFF08'
                          CP-Forced program check in IDA
0010   16 Signed       4 CFEF1PG        X'FFFFFF02'
                          CP-Forced protection check in IDA
0014   20 Signed       4 CFEF1PT        X'8FFFF800'
                          CP-Forced program check for fmt2 IDA
0018   24 Bitstring    8 CFEF2PG (0)    IDAWs X'FFFFFFFFFFFFF002'
0018   24 Bitstring    4 CFEF2PGH       X'FFFFFFFF'
001C   28 Bitstring    4 CFEF2PGL       X'FFFFFF02'
                          CP-Forced protection check for fmt2 IDA
0020   32 Bitstring    8 CFEF2PT (0)    IDAWs X'FFFFFFFFFFFFF000'
0020   32 Bitstring    4 CFEF2PTH       X'FFFFFFFF'
0024   36 Bitstring    4 CFEF2PTL       X'FFFFF000'
          00000028       CFEBKBYL       *-CFEBK
          00000005       CFEBKDSZ       ((CFEBKBYL+7)/8) Doubleword
                                        length of CFEBK

CFEBK Storage Layout

          
*** CFEBK - Map the HCPIODCW resident data area
*
*     +---------------------------+---------------------------+
*   0 |         CFEPRGAD          |         CFEPRTAD          |
*     +---------------------------+---------------------------+
*   8 |         CFEIFCAD          |         CFEICLAD          |
*     +---------------------------+---------------------------+
*  10 |         CFEF1PG           |         CFEF1PT           |
*     +---------------------------+---------------------------+
*  18 |         CFEF2PGH          |         CFEF2PGL          |
*     +---------------------------+---------------------------+
*  20 |         CFEF2PTH          |         CFEF2PTL          |
*     +---------------------------+---------------------------+
*  28
*
*** CFEBK - Map the HCPIODCW resident data area

CFEBK Cross Reference

Symbol         Dspl Value
-------------- ---- -----
CFEBKBYL       0024 00000028
CFEBKDSZ       0024 00000005
CFEF1PG        0010
CFEF1PT        0014
CFEF2PG        0018
CFEF2PGH       0018
CFEF2PGL       001C
CFEF2PT        0020
CFEF2PTH       0020
CFEF2PTL       0024
CFEICLAD       000C
CFEIFCAD       0008
CFEPRGAD       0000
CFEPRTAD       0004