|
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. |
FIOBK
Cross Reference (Contains links to field and bit definitions)
FIOBK Prolog
NAME : HCPFIOBK
DESCRIPTION: FORMATTED I/O BLOCK
DSECT : FIOBK
FUNCTION : DEFINE DASD I/O REQUEST TO STAND-ALONE DASD I/O ROUTINE
WITH A DESCRIPTION OF THE AREA ON THE VOLUME THAT IS TO
USED. THE DATA CAN BE ACCESSED BY using either a
relative block number or an ASA.
LOCATED BY : GENERAL PURPOSE REGISTER 1 ON ENTRY TO HCPLODAS
CREATED BY : HCPCKPRS - BEFORE SYSTEM INITIALIZATION ON A SYSTEM BOUNCE
HCPCKPSH - DURING AN ABNORMAL TERMINATION OR SHUTDOWN
HCPLODNC - DURING THE SYSTEM LOAD PROCESS
DELETED BY : FIOBK IS OBVIATED WHEN SYSTEM BECOMES FUNCTIONAL
FIOBK Control Block Content
FIOBK DSECT
Hex Dec Type/Val Lng Label (dup) Comments ---- ---- --------- ---- -------------- -------- 0000 0 Structure FIOBK FORMATTED I/O BLOCK - INITIALIZATION AND TERMINATION 0000 0 Bitstring 1 FIOCCWOP CCW OP-CODE, CWODRDTA OR CWODWDTA 0001 1 Bitstring 1 FIOFLAG I/O CONDITION FLAG (CC=1) 1... .... FIOSTRFL X'80' I/O STORAGE FAILURE, CANNOT LOAD BLOCK .1.. .... FIOFAIL X'40' I/O FAILURE AFTER 10 ATTEMPTS ..1. .... FIODEVIC X'20' I/0 DEVICE DOES NOT RESPOND ...1 .... FIORANGE X'10' I/O OUTSIDE OF RANGE OF CYLINDERS OR PAGES .... .... FIOSUCES X'00' CC=0 I/O WAS SUCCESSFUL 0002 2 Bitstring 1 FIOWRPFL HCPWRP requesting altnuc I/O flags 1... .... FIOIPLRC X'80' Read IPL rec from vol in FIOASA .1.. .... FIOLODMD X'40' Read HCPLOD from Volume in FIOASA 0003 3 Bitstring 1 * Reserved for future IBM use 0004 4 Signed 4 FIOAREAS Starting cylinder(CKD/ECKD) or page(FBA) number of the area on the volume where I/O can be done 0008 8 Signed 4 FIOAREAL Length in cylinders/pages of the area on the volume where I/O can done 000C 12 Signed 2 FIOPCYLS PAGES PER CYLINDER ON THIS DEVICE 000E 14 Signed 2 FIOPTRKS PAGES PER TRACK ON THIS DEVICE 0010 16 Address 4 FIOPAGAD ADDRESS OF PAGE TO BE READ OR WRITTEN 0014 20 Signed 4 FIOSUBCH SUBCHANNEL NUMBER OF UNIT 0018 24 Signed 4 FIOASA Spooling ASA(CKD-CCPV, FBA-PPPV) 001C 28 Signed 4 FIOBLKNO BLOCK NUMBER WITH 'FILE' 0020 32 Signed 2 FIOLEN LENGTH OF RECORD TO BE READ OR WRITTEN 0022 34 Signed 2 * RESERVED FOR FUTURE IBM USE 00000005 FIOSIZE (*-FIOBK+7)/8 LENGTH OF FORMATTED I/O BLOCK
FIOBK Storage Layout
*** FIOBK - FORMATTED I/O BLOCK * * +------+------+------+------+---------------------------+ * 0 |:CCWOP|:FLAG |:WRPFL|//////| FIOAREAS | * +------+------+------+------+-------------+-------------+ * 8 | FIOAREAL | FIOPCYLS | FIOPTRKS | * +---------------------------+-------------+-------------+ * 10 | FIOPAGAD | FIOSUBCH | * +---------------------------+---------------------------+ * 18 | FIOASA | FIOBLKNO | * +-------------+-------------+---------------------------+ * 20 | FIOLEN |/////////////| 24 * +-------------+-------------+ * *** FIOBK - FORMATTED I/O BLOCK
FIOBK Cross Reference
(contains links to field and bit definitions)Symbol Dspl Value -------------- ---- -----FIOAREAL 0008
FIOAREAS 0004
FIOASA 0018
FIOBLKNO 001C
FIOCCWOP 0000
FIODEVIC 0001 20
FIOFAIL 0001 40
FIOFLAG 0001
FIOIPLRC 0002 80
FIOLEN 0020
FIOLODMD 0002 40
FIOPAGAD 0010
FIOPCYLS 000C
FIOPTRKS 000E
FIORANGE 0001 10
FIOSIZE 0022 00000005
FIOSTRFL 0001 80
FIOSUBCH 0014
FIOSUCES 0001 00
FIOWRPFL 0002
Last updated on 3 Aug 1999 at 11:55:38 EDT.
Copyright IBM Corporation, 1990, 1999