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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. |
LDDBK
Cross Reference (Contains links to field and bit definitions)
LDDBK Prolog
NAME : HCPLDDBK
DESCRIPTION: LOGICAL DISPLAY DEVICE SIMULATION BLOCK
DSECT : LDDBK
FUNCTION : THE LDDBK IS USED TO MAINTAIN INFORMATION NEEDED
TO EFFECTIVELY SIMULATE LOGICAL 327X AND 328X DEVICES.
THE DATA STRUCTURE THAT THESE BLOCKS RESIDE IN IS
MAINTAINED IN THE MODULE HCPLDA, AND THESE BLOCKS
ARE ONLY AVAILABLE VIA CALL TO THAT MODULE.
SEE HCPLDA FOR DETAILS.
LOCATED BY : HCPLDAFE
CREATED BY : HCPLDACR
DELETED BY : HCPLDADD
LDDBK Control Block Content
LDDBK DSECT
Hex Dec Type/Val Lng Label (dup) Comments ---- ---- --------- ---- -------------- -------- 0000 0 Structure LDDBK LOGICAL DISPLAY DEVICE SIMULATION BLOCK 0000 0 Dbl-Word 8 LDDBKID (0) BLOCK IDENTIFIER 0000 0 Character 5 LDDNAME BLOCK NAME 'LDDBK' 0005 5 Bitstring 1 LDDVERS BLOCK VERSION NUMBER 00000001 LDDCURVR LDDMAR1 CURRENT VERSION OF THE LDDBK 00000001 LDDMAR1 X'01' VM/XA MA RELEASE 1 0006 6 Signed 2 LDDLDNUM LOGICAL DEVICE NUMBER 0008 8 Signed 4 LDDBUFAD PENDING DATA BUFFER ADDRESS 000C 12 Signed 4 LDDSUSP CPEBK ADDRESS FOR SUSPENDED TASK 0010 16 Signed 4 LDDCOUNT PENDING CCW DATA COUNT 0014 20 Bitstring 1 LDDCRCW CURRENT CCW OPCODE 0015 21 Bitstring 1 LDDSENSE SENSE INFORMATION 0016 22 Bitstring 1 LDDUSTTS UNIT STATUS INFORMATION 0017 23 Bitstring 1 LDDEXTCD EXTERNAL INTERRUPT CODE TO REFLECT TO HOST MACHINE 00000001 LDDKILLD X'01' CP HAS TERMINATED THIS DEVICE 00000002 LDDWRT X'02' A WRITE WAS ISSUED TO THIS DEVICE 00000003 LDDNTFY X'03' A PREVIOUS PRESENT IS NOW COMPLETE 00000004 LDDRDBUF X'04' READ-BUFFER ISSUED TO THIS DEVICE 00000005 LDDRDMOD X'05' READ-MODIFIED ISSUED TO THIS DEVIC 0018 24 Bitstring 1 LDDWTNG FUNCTION WE ARE WAITING FOR 1... .... LDDACCWT X'80' ACCEPT - WRITE CCW PENDING .1.. .... LDDPRBWT X'40' PRESENT - READ-BUFFER PENDING ..1. .... LDDPRMWT X'20' PRESENT - READ-MODIFIED PENDING ...1 .... LDDSTAWT X'10' WAITING FOR STATUS DIAGNOSE .... 1... LDDWACWT X'08' IN WRITE/ACCEPT CHAIN - DON'T MOVE CCW INTO DATA BUFFER .... .1.. LDDPREXT X'04' PRESENT IN PROGRESS - REFLECT INTERRUPT CODE 3 ON COMPLETION 0019 25 Bitstring 1 LDDCURPR CURRENT PROCESSING FLAGS 1... .... LDDPRES X'80' PRESENT IN PROGRESS .1.. .... LDDACCPT X'40' ACCEPT IN PROGRESS ..1. .... LDDEXTRN X'20' External interrupt being reflected (not reason code 3) ...1 .... LDDMVPTL X'10' MOVE PARTIAL DATA ON ACCEPT .... 1... LDDPRDBU X'08' PRESENT of read buffer data .... .1.. LDDEXT3 X'04' External interrupt reason code 3 being reflected 001A 26 Bitstring 1 LDDSCHAR SPECIAL DEVICE CHARACTERISTICS 1... .... LDDACCST X'80' STATUS MUST FOLLOW ACCEPT FUNCTION .1.. .... LDDEXTFT X'40' EXTENDED FEATURES SUPPORTED ..1. .... LDDNOEWA X'20' Erase/Write Alternate NOT supported ...1 .... LDDDEVID X'10' Device identifier provided 001B 27 Bitstring 1 LDDSTATS MISCELLANEOUS STATUS 1... .... LDDPURGE X'80' PRESENT DATA BUFFER WAS PURGED .1.. .... LDDCPBUF X'40' BUFFER AT LDDBUFAD IS IN CP STORAGE. ..1. .... LDDLERR X'20' ERROR DETECTED DURING LIST FORM PRESENT ...1 .... LDDDEAD X'10' LOGICAL DEVICE IS DECEASED .... 1... LDDBUFPG X'08' Buffer at LDDBUFAD is a page and was obtained via HCPPTFGF .... .1.. LDDSELR X'04' SELECTIVE RESET HAS BEEN DONE ON THIS LDDBK. .... ..1. LDDNTYDN X'02' PRESENT LIST FORMAT EXT INT DONE .... ...1 LDDHVM24 X'01' HVM addressing mode is 24 bit 001C 28 Signed 4 LDDBUFL PENDING DATA BUFFER LENGTH - BYTES 0020 32 Signed 4 LDDPARNT VMDBK ADDRESS OF THE VIRTUAL MACHINE THAT CREATED THE LOGICAL DEVICE 0024 36 Signed 4 LDDFPNTR FORWARD POINTER TO NEXT LDDBK 0028 40 Signed 4 LDDBPNTR BACK POINTER TO PREVIOUS LDDBK 002C 44 Signed 4 LDDRDEV ADDRESS OF RDEV FOR LOGICAL DEVICE 0030 48 Dbl-Word 8 LDDLOCK (3) LDDBK LOCK SEMAPHORE 0048 72 Bitstring 4 LDDIDENT Logical device identifier 004C 76 Bitstring 4 * Reserved 0000000A LDDSIZE (*-LDDBK+7)/8 SIZE OF LDDBK IN DOUBLEWORDS
LDDBK Storage Layout
*** LDDBK - LOGICAL DISPLAY DEVICE SIMULATION BLOCK * * +----------------------------------+------+-------------+ * 0 | LDDNAME |:VERS | LDDLDNUM | * +---------------------------+------+------+-------------+ * 8 | LDDBUFAD | LDDSUSP | * +---------------------------+------+------+------+------+ * 10 | LDDCOUNT |:CRCW |:SENSE|:USTTS|:EXTCD| * +------+------+------+------+------+------+------+------+ * 18 |:WTNG |:CURPR|:SCHAR|:STATS| LDDBUFL | * +------+------+------+------+---------------------------+ * 20 | LDDPARNT | LDDFPNTR | * +---------------------------+---------------------------+ * 28 | LDDBPNTR | LDDRDEV | * +---------------------------+---------------------------+ * 30 | | * = LDDLOCK = * | | * +---------------------------+---------------------------+ * 48 | LDDIDENT |///////////////////////////| * +---------------------------+---------------------------+ * 50 * *** LDDBK - LOGICAL DISPLAY DEVICE SIMULATION BLOCK
LDDBK Cross Reference
(contains links to field and bit definitions)Symbol Dspl Value -------------- ---- -----LDDACCPT 0019 40
LDDACCST 001A 80
LDDACCWT 0018 80
LDDBKID 0000
LDDBPNTR 0028
LDDBUFAD 0008
LDDBUFL 001C
LDDBUFPG 001B 08
LDDCOUNT 0010
LDDCPBUF 001B 40
LDDCRCW 0014
LDDCURPR 0019
LDDCURVR 0005 00000001
LDDDEAD 001B 10
LDDDEVID 001A 10
LDDEXTCD 0017
LDDEXTFT 001A 40
LDDEXTRN 0019 20
LDDEXT3 0019 04
LDDFPNTR 0024
LDDHVM24 001B 01
LDDIDENT 0048
LDDKILLD 0017 00000001
LDDLDNUM 0006
LDDLERR 001B 20
LDDLOCK 0030
LDDMAR1 0005 00000001
LDDMVPTL 0019 10
LDDNAME 0000
LDDNOEWA 001A 20
LDDNTFY 0017 00000003
LDDNTYDN 001B 02
LDDPARNT 0020
LDDPRBWT 0018 40
LDDPRDBU 0019 08
LDDPRES 0019 80
LDDPREXT 0018 04
LDDPRMWT 0018 20
LDDPURGE 001B 80
LDDRDBUF 0017 00000004
LDDRDEV 002C
LDDRDMOD 0017 00000005
LDDSCHAR 001A
LDDSELR 001B 04
LDDSENSE 0015
LDDSIZE 004C 0000000A
LDDSTATS 001B
LDDSTAWT 0018 10
LDDSUSP 000C
LDDUSTTS 0016
LDDVERS 0005
LDDWACWT 0018 08
LDDWRT 0017 00000002
LDDWTNG 0018
Last updated on 3 Aug 1999 at 12:08:22 EDT.
Copyright IBM Corporation, 1990, 1999