Programming Interface Information:
This information is NOT intended to be used as Programming Interfaces of z/VM. |
CFEBK
Control Block Contents
CFEBK DSECT
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
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