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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. |
RCWBK
Cross Reference (Contains links to field and bit definitions)
RCWBK Prolog
NAME : HCPRCWBK
DESCRIPTION: CURRENT REAL CHANNEL CONTROL WORDS
DSECT : RCWBK
FUNCTION : THIS CONTROL BLOCK IS USED AS A REAL CHANNEL WORK AREA.
IT CONTAINS CHANNEL PROGRAMS FOR I/O TO VARIOUS DEVICES.
LOCATED BY : CPTRCWCH FIELD OF HCPCPTCA
CPTRCWBK FIELD OF HCPCPTCA
IORTASK FIELD OF HCPIORBK
MNDARCW FIELD OF HCPMNDCO (MONITOR TAPE)
RCWPNT CHAINED
VCTXRCW FIELD OF HCPVCTCA (X-SIDE)
VCTYRCW FIELD OF HCPVCTCA (Y-SIDE)
VDSRCW FIELD OF HCPVDSBK (CURRENT)
CREATED BY : HCPCCWTR - DURING INITIALIZATION OF CHANNEL PROGRAM
TRANSLATION FUNCTION.
HCPINSCW - WHILE CREATING CHAINS OF RCWBKS WHEN
MANIPULATING GUEST CHANNEL PROGRAMS.
HCPINSTC - WHILE CREATING CHAINS OF RCWBKS WHEN
MANIPULATING GUEST CHANNEL PROGRAMS.
HCPDGDDK - FOR SIMULATION OF DIAGNOSE X'18'.
HCPGRSBR - BUILDS RCWBK FOR I/O TO DISPLAY DEVICES.
HCPTDKRL - AFTER RELEASING T-DISK SPACE TO POOL OF FREE SPACE
DELETED BY : HCPDGDDK - FOR SIMULATION OF DIAGNOSE X'18'.
HCPGFSTO - TO INITIATE I/O FOR FULL SCREEN VIRTUAL MACHINE.
HCPGRFIC - FOR DISPLAY DEVICE I/O REQUEST.
HCPGRSCO - ON A FATAL I/O ERROR ON READ OF DISPLAY BUFFER.
HCPTDKRL - BEFORE RELEASING T-DISK SPACE TO POOL OF FREE
SPACE.
HCPUNTFR - WHILE UNLOCKING PAGES ASSOCIATED WITH A COMPLETED
I/O OPERATION AND RETURNING CCW CHAIN(S) TO FREE
STORAGE.
RCWBK Control Block Content
RCWBK DSECT
Hex Dec Type/Val Lng Label (dup) Comments ---- ---- --------- ---- -------------- -------- 0000 0 Structure RCWBK CURRENT REAL CHANNEL CONTROL WORDS 0000 0 Signed 4 RCWPNT POINTER TO NEXT RCWBK 0004 4 Signed 4 RCWVCAW VIRTUAL ADDRESS OF CCW CHAIN 0008 8 Bitstring 8 RCWCTL (0) CONTROL FLAGS FOR EACH CCW 1... .... RCWPFIX X'80' I/O DATA PAGE LOCKED .1.. .... RCWGEN X'40' CP GENERATED CCW ..1. .... RCWGDCP X'20' GUEST DATA IN CP STORAGE ...1 .... RCWREDR X'10' REDRIVE REQUIRED .... 1... RCWUNTRL X'08' UNTRANSLATION REQUIRED .... .1.. RCWDATCH X'04' CCW WAS REACHED VIA DATA CHAINING .... ..1. RCWINVL X'02' CCW OP CODE OR ADDRESS IS INVALID .... ...1 RCWSUSP X'01' CCW had suspend on before modification 0008 8 Bitstring 1 RCWCTL1 CONTROL FLAGS FOR CCW1 0009 9 Bitstring 1 RCWCTL2 CONTROL FLAGS FOR CCW2 000A 10 Bitstring 1 RCWCTL3 CONTROL FLAGS FOR CCW3 000B 11 Bitstring 1 RCWCTL4 CONTROL FLAGS FOR CCW4 000C 12 Bitstring 1 RCWCTL5 CONTROL FLAGS FOR CCW5 000D 13 Bitstring 1 RCWCTL6 CONTROL FLAGS FOR CCW6 000E 14 Bitstring 1 RCWCTL7 CONTROL FLAGS FOR CCW7 000F 15 Bitstring 1 RCWCTL8 CONTROL FLAGS FOR CCW8 00000010 RCWHEADL (*-RCWBK) SIZE OF RCWBK "HEADER" 0010 16 Dbl-Word 8 RCWCCW (0) 1 TO 8 CHANNEL COMMAND WORDS 0010 16 Dbl-Word 8 RCWCCW1 CHANNEL COMMAND WORD 1 0018 24 Dbl-Word 8 RCWCCW2 CHANNEL COMMAND WORD 2 0020 32 Dbl-Word 8 RCWCCW3 CHANNEL COMMAND WORD 3 0028 40 Dbl-Word 8 RCWCCW4 CHANNEL COMMAND WORD 4 0030 48 Dbl-Word 8 RCWCCW5 CHANNEL COMMAND WORD 5 0038 56 Dbl-Word 8 RCWCCW6 CHANNEL COMMAND WORD 6 0040 64 Dbl-Word 8 RCWCCW7 CHANNEL COMMAND WORD 7 0048 72 Dbl-Word 8 RCWCCW8 CHANNEL COMMAND WORD 8 0050 80 Dbl-Word 8 RCWCPTIC CP TIC (IF NEEDED AND NONE PRIOR) 0058 88 Dbl-Word 8 RCWDATA (3) RELOCATED DATA AREA 0070 112 Bitstring 1 RCWBYTE5 (8) BYTE 5 OF EACH DIAG 58 CCW IN RCWBK 0078 120 Bitstring 8 RCWCTLA (0) Control Flags For Each CCW 1... .... RCWSPBUF X'80' Special buffer handling 0078 120 Bitstring 1 RCWCTL1A Control Flags For CCW1 0079 121 Bitstring 1 RCWCTL2A Control Flags For CCW2 007A 122 Bitstring 1 RCWCTL3A Control Flags For CCW3 007B 123 Bitstring 1 RCWCTL4A Control Flags For CCW4 007C 124 Bitstring 1 RCWCTL5A Control Flags For CCW5 007D 125 Bitstring 1 RCWCTL6A Control Flags For CCW6 007E 126 Bitstring 1 RCWCTL7A Control Flags For CCW7 007F 127 Bitstring 1 RCWCTL8A Control Flags For CCW8 00000080 RCWSIZBY *-RCWBK Size in bytes 00000010 RCWSIZE (*-RCWBK+7)/8 RCWBK SIZE IN DOUBLE WORDS 0058 88 Dbl-Word 8 RCWDATA1 DATA AREA TO HOLD A RELOCATED ARGUMENT 0060 96 Dbl-Word 8 RCWDATA2 DATA AREA TO HOLD A RELOCATED ARGUMENT 0068 104 Dbl-Word 8 RCWDATA3 DATA AREA TO HOLD A RELOCATED ARGUMENT 0058 88 Dbl-Word 8 RCWSEEK POSSIBLE SEEK ARGUMENT OR NULL 0058 88 Bitstring 16 RCWDXARG (0) Define extent argument 0058 88 Bitstring 1 RCWDXFM Extent file mask 0059 89 Bitstring 1 RCWDXGA Extent global attributes 005A 90 Signed 2 RCWDXBLK Extent maximum blocksize 005C 92 Signed 4 RCWDXRSV Reserved - must be zero 0060 96 Signed 4 RCWDXBEG (0) Extent start - CCHH 0060 96 Signed 2 RCWDXBCC Extent start CC 0062 98 Signed 2 RCWDXBHH Extent start HH 0064 100 Signed 4 RCWDXEND (0) Extent end - CCHH 0064 100 Signed 2 RCWDXECC Extent end CC 0066 102 Signed 2 RCWDXEHH Extent end HH 0000000E RCWDXMXH 14 Extent default maximum valid HH value 0068 104 Character 5 RCWSRCH DATA FOR SEARCH-ID-EQ CCW 0068 104 Character 2 RCWSRCC CC (cylinder) of search arg 006A 106 Character 3 RCWSRHHR (0) HHR (head and record) 006A 106 Character 2 RCWSRHH HH (head) of search argument 006C 108 Character 1 RCWSRCHR R (record) of search argument 0058 88 Character 2 * 005A 90 Character 2 RCWSEEK2 DASD ARM POSITION - CC OF BBCCHHR 005C 92 Character 3 * HHR 005F 95 Character 1 RCWSEEK7 ARGUMENT OF SET SECTOR CCW 0058 88 Character 4 RCWSEEKP CYLINDER SPECIFICATION 005C 92 Character 4 * 0058 88 Signed 2 RCWSKBIN SEEK BIN NUMBER 005A 90 Signed 2 RCWSKCYL SEEK CYLINDER NUMBER 005C 92 Signed 2 RCWSKHED SEEK HEAD NUMBER 005E 94 Bitstring 1 RCWFMASK FILE MASK FOR SET FILE MASK COMMAND 005F 95 Bitstring 1 * THIS SECTION IS FOR TERMINAL HANDLING 0030 48 Bitstring 1 RCW5WCC LOC OF WRITE CONTROL CHARACTER 0031 49 Bitstring 1 RCW5SBA LOC OF START BUFFER ADDR ORDER 0032 50 Character 6 * 0058 88 Bitstring 1 RCWSWCC LOC OF WRITE CONTROL CHARACTER 0059 89 Character 7 *
RCWBK Storage Layout
*** RCWBK - CURRENT REAL CHANNEL CONTROL WORDS * * +---------------------------+---------------------------+ * 0 | RCWPNT | RCWVCAW | * +------+------+------+------+------+------+------+------+ * 8 |:CTL1 |:CTL2 |:CTL3 |:CTL4 |:CTL5 |:CTL6 |:CTL7 |:CTL8 | * +------+------+------+------+------+------+------+------+ * 10 | RCWCCW1 | * +-------------------------------------------------------+ * 18 | RCWCCW2 | * +-------------------------------------------------------+ * 20 | RCWCCW3 | * +-------------------------------------------------------+ * 28 | RCWCCW4 | * +-------------------------------------------------------+ * 30 | RCWCCW5 | * +-------------------------------------------------------+ * 38 | RCWCCW6 | * +-------------------------------------------------------+ * 40 | RCWCCW7 | * +-------------------------------------------------------+ * 48 | RCWCCW8 | * +-------------------------------------------------------+ * 50 | RCWCPTIC | * +-------------------------------------------------------+ * 58 | | * = RCWDATA = * | | * +-------------------------------------------------------+ * 70 | RCWBYTE5 | * +------+------+------+------+------+------+------+------+ * 78 |:CTL1A|:CTL2A|:CTL3A|:CTL4A|:CTL5A|:CTL6A|:CTL7A|:CTL8A| * +------+------+------+------+------+------+------+------+ * 80 * *** RCWBK - CURRENT REAL CHANNEL CONTROL WORDS *** Overlay for RCWDATA in RCWBK * * +-------------------------------------------------------+ * 58 | RCWDATA1 | * +-------------------------------------------------------+ * 60 | RCWDATA2 | * +-------------------------------------------------------+ * 68 | RCWDATA3 | * +-------------------------------------------------------+ * 70 * *** Overlay for RCWDATA in RCWBK *** Overlay for RCWDATA in RCWBK * * +-------------------------------------------------------+ * 58 | RCWSEEK | * +-------------------------------------------------------+ * 60 * *** Overlay for RCWDATA in RCWBK *** Overlay for RCWSEEK in RCWBK * * +------+------+-------------+---------------------------+ * 58 |:DXFM |:DXGA | RCWDXBLK | RCWDXRSV | * +------+------+-------------+-------------+-------------+ * 60 | RCWDXBCC | RCWDXBHH | RCWDXECC | RCWDXEHH | * +-------------+-------------+------+------+-------------+ * 68 | RCWSRCH | 6D * +----------------------------------+ * *** Overlay for RCWSEEK in RCWBK *** Overlay for RCWSRCH in RCWBK * * +-------------+-------------+------+ * 68 | RCWSRCC | RCWSRHH |:SRCHR| 6D * +-------------+-------------+------+ * *** Overlay for RCWSRCH in RCWBK *** Overlay for RCWSEEK in RCWBK * * +-------------+-------------+--------------------+------+ * 58 |/////////////| RCWSEEK2 |////////////////////|:SEEK7| * +-------------+-------------+--------------------+------+ * 60 * *** Overlay for RCWSEEK in RCWBK *** Overlay for RCWSEEK in RCWBK * * +---------------------------+---------------------------+ * 58 | RCWSEEKP |///////////////////////////| * +---------------------------+---------------------------+ * 60 * *** Overlay for RCWSEEK in RCWBK *** Overlay for RCWSEEK in RCWBK * * +-------------+-------------+-------------+------+------+ * 58 | RCWSKBIN | RCWSKCYL | RCWSKHED |:FMASK|//////| * +-------------+-------------+-------------+------+------+ * 60 * *** Overlay for RCWSEEK in RCWBK *** Overlay for RCWCCW5 in RCWBK * * +------+------+-----------------------------------------+ * 30 |:5WCC |:5SBA |/////////////////////////////////////////| * +------+------+-----------------------------------------+ * 38 * *** Overlay for RCWCCW5 in RCWBK *** Overlay for RCWSEEK in RCWBK * * +------+------------------------------------------------+ * 58 |:SWCC |////////////////////////////////////////////////| * +------+------------------------------------------------+ * 60 * *** Overlay for RCWSEEK in RCWBK
RCWBK Cross Reference
(contains links to field and bit definitions)Symbol Dspl Value -------------- ---- -----RCWBYTE5 0070
RCWCCW 0010
RCWCCW1 0010
RCWCCW2 0018
RCWCCW3 0020
RCWCCW4 0028
RCWCCW5 0030
RCWCCW6 0038
RCWCCW7 0040
RCWCCW8 0048
RCWCPTIC 0050
RCWCTL 0008
RCWCTLA 0078
RCWCTL1 0008
RCWCTL1A 0078
RCWCTL2 0009
RCWCTL2A 0079
RCWCTL3 000A
RCWCTL3A 007A
RCWCTL4 000B
RCWCTL4A 007B
RCWCTL5 000C
RCWCTL5A 007C
RCWCTL6 000D
RCWCTL6A 007D
RCWCTL7 000E
RCWCTL7A 007E
RCWCTL8 000F
RCWCTL8A 007F
RCWDATA 0058
RCWDATA1 0058
RCWDATA2 0060
RCWDATA3 0068
RCWDATCH 0008 04
RCWDXARG 0058
RCWDXBCC 0060
RCWDXBEG 0060
RCWDXBHH 0062
RCWDXBLK 005A
RCWDXECC 0064
RCWDXEHH 0066
RCWDXEND 0064
RCWDXFM 0058
RCWDXGA 0059
RCWDXMXH 0066 0000000E
RCWDXRSV 005C
RCWFMASK 005E
RCWGDCP 0008 20
RCWGEN 0008 40
RCWHEADL 000F 00000010
RCWINVL 0008 02
RCWPFIX 0008 80
RCWPNT 0000
RCWREDR 0008 10
RCWSEEK 0058
RCWSEEKP 0058
RCWSEEK2 005A
RCWSEEK7 005F
RCWSIZBY 007F 00000080
RCWSIZE 007F 00000010
RCWSKBIN 0058
RCWSKCYL 005A
RCWSKHED 005C
RCWSPBUF 0078 80
RCWSRCC 0068
RCWSRCH 0068
RCWSRCHR 006C
RCWSRHH 006A
RCWSRHHR 006A
RCWSUSP 0008 01
RCWSWCC 0058
RCWUNTRL 0008 08
RCWVCAW 0004
RCW5SBA 0031
RCW5WCC 0030
Last updated on 3 Aug 1999 at 12:27:17 EDT.
Copyright IBM Corporation, 1990, 1999