SY20-0884-3_Data_Areas_and_Control_Block_Logic_Update

Aug. 1, 1979
74.2 IBM VM/370 Data Areas and Control Block Logic

Aug. 1r 1979 PSA Hexadecimal Field
Displacement Name Field Description, Contents, Meaning
434
438 43C 440 470 478 440 480 484
488 48C 490 494 498 49C 4AO 4A4
4A8 4AC 4BO 4B4
4B8 4BC 4CO 4C4 4C8 4CC 4DO 4D4
4D8 4DC 4EO 4E4
4E8 4EC 4FO 4F4
4F8 4FC 500 500 540 580 5CO 600 640 650 660 664
668
66C 670 678 680 684 INSTWBD2 DC INSTWRD3 DC· INSTWBD4 DC F'O' F'O' F'O' Reserved for installation use
Reserved for installation use
Reserved for installation use
List of ZEBOES BLANKS
FFS Fregue,!!tly .!!§ed Constants DC 6D'0' DC 8X'40' DC 8X' FF' Also -1 FO EQU ZEROES F1 DC F'1'
F2 DC F'2'
F3 DC F'3'
F4 DC F'4' F5 DC F'5'
F6
F7
F8
F9 F10 F15
F16 F20 F24 F60 F240 F255
F256
F4095
F4096
DC DC DC DC DC DC DC DC DC DC DC DC DC DC DC APTBLK DC NOADD DC X40FFS DC XBIGHT24 DC XPAGNUM DC XBIGHT16 DC AFBEE DC AFBET DC AQCNWT DC ADSPCH DC APTBAN DC X2048BND DC PSBCLR2 DS DUMPSAVE DS SIGSAVE DS LOKSAVE DS MFASAVE DS SWTHSAVE DS LOCKSAV DS SVCREGS DS PREFIXA DC PREFIXB DC PSACPXBP DC RESVD DS WAITSTRT DS
WAITEND DS PWTPAGES DC ACTIVTRQ DC F'6'
F'7'
F'8'
F'9'
F'10'
F'1S'
F'16'
F'20'
F'24'
F'60'
F' 240' F' 2S5'
F'256'
F'4095'
F'4096'
v (DMKPTRLK) X'FFOOOOOO' X'40FFFFFF' X'OOFFFFFF' X'OOFFFOOO' X'OOOOFFFF' V (DMKFREE) V (DMKFRET) V (DMKQCNWT) V (DMKDSPCH) V (D MKPTRAN) X'00FFF800' OF 16F
16F
16F
16F
16F
4F
4F F'O' F'O' A (0) 1F
D
D F'O' A (0) Also
Also
Also
Also
Also
Also
Also X'OOOOOOOF' X'0000003C' X'OOOOOOFO' = X'OOOOOOFF' X'00000100' X'OOOOOFFF' X'00001000' Entry to lock a page in storage
Frequently used work value
Frequently used work value
Isolate right 24 bits
Isolate the page number
Isolate the right 16 bits
Entry to allocate free storage
Entry to release free storage
Entry to write a terminal message
Entry to the VM/370 dispatcher
Entry to the paging supervisor
Locate a half-page boundary
Start of second area cleared by CP initialization (DMKCPI) Save area for dump routine
Save area for DMKEXT DMKLOK save area
Save area for malfunction alert DMKVMASW save area LOCK macro save area SVC save area
Prefix value of this processor
Prefix value of other processor
Address of CPEXBLOK for switch SVC. Note that PSACPXBP is in absolute PSA. Reserved for IBM use Timer value at start of wait
Timer value at end of wait
Pages in PGWAIT at start of wait
Address of active transit queue
Section 1. CP Data Areas and Control Blocks 75

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Extracted Text (may have errors)

Hexadecimal Field
Displacement Name
------------ 410 ALOKFR DC
414 ALOKSY DC
418 PSARECP S DC
41C PSARSV15 DS 430 INSTWRD 1 DC Page of SY20-0884 .... 3 As Updated Aug. 1,1979 by TNL SN25-0497 PSA F'ield Description, Contents, Meaning
-------------------------------------- V (DMKLOKFR) Attached processor free lockword
address V (DMKLOKSY) Attached processor system lockword
address F'O' Reserved for ECPS 5F Reserved for IBM use F'O' Reserved for installation use
section 1. CP Data Areas and Control Blocks 74.1

Aug. 1, 1979
74.2 IBM VM/370 Data Areas and Control Block Logic

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Page of SY20-0884-3 As Updated Aug. lr 1979 by TNL SN25-0497 PSA Hexadecimal Field
Displacement Name
39C 3AO 3A4
3A8
3AC 380 3B4
3B8
3BC 3CO 3C4
3C8
3CC 3DO 3D4
3D8
3DC 3EO 3E4
3E8
3EC 3FO 3F4
3F8
3FC 400 ARSPAC DC AVMREAL DC ASYSABND DC ASYSLC DC ASYSOP DC ARIOCT DC
ARIOCH DC ARIOCU DC ARIODV DC ARIOCC DC
ARIoue DC ARIODC DC
ACORETBL DC
APAGCP DC CPCREGO DC
CPCREG6 DC
CPCREG8 DC TIMEDISP DS ASVCLIST DC AVMALIST DC LASTUSER DC PAGECUR DS MONNEXT DS PAGEND DS PAGENXT DS TRACEFLG DS v (DMKRSPAC) A (0) A (0) V (DMKSYSLC) V (DMKSYSOP) V (DMKRIOCT) V (DMKRIOCH) V CD MKRIOCU) V (DMKRIODV) V (DMKRIOCC) V (DMKRIOUC) V (DMKRIODC) V (DMKSYSCS) A(X'FFFFFF') X'808008CO' F'O' F'O' IF V (DMKSVCNS) V (DMKPRVMA) V (DMKSYSVM) IF IF IF IF IF Field Descriptionr Contentsr Meaning
Address of system accounting chain VMBLOK address of virtual=real user. Note
that AVMREAL is maintained in both PSAs Address of system abend printer
Address of SYSLOCS information
Address of system operator VMBLOK Address of real channel index table
Address of first ReHBLOK
-Address of first RCUBLOK Address of first RDEVBLOK Address of count of real system channels
Address of count of real system control units
Address of count of real system devices
Address of system CORTABLE
Address of first pageable program CP architecture control and external mask CP assist and virtual machine assist mask MONITOR CALL enable mask
Timer displacement for charge
Address of CP assist pointer list
Address of expanded virtual machine assist
pointer list
Last user to be dispatched
Current monitor buffer page address.
Note that PAGECUR is in absolute PSA. Next available address in monitor buffer.
Note that MONNEXT is in absolute PSA. Last address in current monitor buffer page.
Note that PAGEND is in absolute PSA. Alternate monitor buffer page address.
Note that PAGENXT is in absolute PSA. Trace table flags ORG TRACEFLG 400 401 402 404 408 40A 40C TRACFLGl DS lX Bii2 defined TRACO 1 EQU TRAC02 EQU TRAC03 EQU TRAC04 EQU TRAC05 EQU TRAC67 EQU TRAC08 EQU TRAC09 EQU TRACFLG2 DS Bii2 TRACOA EQU TRACOC EQU TRACOD EQU TRACBEF EQU TRAC10 EQU TRACll EQU TRAC12 EQU TRAC13 EQU TRACFLG3 DS TTSEGCNT DS CSADDR DC PSARSV DS PSARSV1 DS in TRACFLGl --XIsO-'-- X'40' X'20' l' 10' X'08' 1'04' 1'02' X'Ol' lX in TRACFLG2 --X'80-'-- X'40' X'20' X' 10' X'08' X'04' X' 02' X'Ol' lH IF H' 0 '
H
1F
Trace table flag
External interrupt tracing on SVC interrupt tracing on Program interrupt tracing on
Machine check tracing on I/O interrupt tracing on
FREE/FRET call tracing on
Enter dispatch tracing on
Queue drop tracing on
Trace table flag
Run user tracing on Unstack I/O interrupt tracing on
virtual CSW stored tracing on SIO r TIO r and HDV tracing on Unstack IOBLOK or TRQBLOK tracing on
Trace BTU activity for 370x NCP Lock spin tracing active Signal processor tracing active
Reserved for IBM use
Count of total page/swap tables in system.
Note that TTSEGCNT is in absolute PSA. P*7 Channel set address P*8 Reserved for IBM use
Reserved for IBM use 74 IBM VM/370 Data Areas and Control Block Logic

Hexadecimal Field
Displacement Name
------------ 410 ALOKFR DC
414 ALOKSY DC
418 PSARECP S DC
41C PSARSV15 DS 430 INSTWRD 1 DC Page of SY20-0884 .... 3 As Updated Aug. 1,1979 by TNL SN25-0497 PSA F'ield Description, Contents, Meaning
-------------------------------------- V (DMKLOKFR) Attached processor free lockword
address V (DMKLOKSY) Attached processor system lockword
address F'O' Reserved for ECPS 5F Reserved for IBM use F'O' Reserved for installation use
section 1. CP Data Areas and Control Blocks 74.1

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Extracted Text (may have errors)

Hexadecimal
Displacement
------------
348
348
349
34A 3lfB 34C 350 354
358 360 368
36C
36E 370 370 374
378
378
37A
37C 380 384
388
38C 390 394
398
39A
Field
Name CPSTAT DS ORG CPSTATUS DS Bits defined CPWAIT EQU CPRUN EQU CPEX EQU CPFVRUN EQU CPSUPER EQU XTNDLOCK DC CPSTAT2 DC gefined CPMICAVL EQU CPMICON EQU CPSHRLK EQU CPASTAVL EQU CPASTON EQU CPSTAT3 DS deli!led CPT IDLE EQU CPTPAGE EQU CPTIONT EQU CPRESTRT DS PGREAD DS PGWRITE DS PGWAITIM DS PGWAITPG DS PSASVCCT DS PAGELOAD DS PAGERATE DS PSENDCLR DS CPID DS CPABEND DS PSTARTSV DS SYSIPLDV DS PGSRATIO DC ASYSVM DC ARSPPR DC ARSPPU DC ARSPRD DC ARIOPU DC ARIOPR DC ARIORD DC IPUADDR DS PSAMSS DS 1F CPSTAT 1X in CP2TATUS X'80' X'40' X'20' X'10' X'08' 1X 1X 111 CP21ATl X'80' X'40' X'20' X'08' X'04' 1X in X'80' X'40' X'20' 1F
1F
1F
1D
1D
1F
1H
1H OF 1F
1F OF P*1 P*2 1H P*3 H'O' P*4 V (DMKSYSVM) v (DMKRSPPR) V (DMKRSPPU) V (DMKRSPRD)
v (DMKRIOPU) v (DMKRIOPR) v (DMKRIORD) 1H P*5 1H P*6
Bits dei!!!ed in PSAMSS MSSPRES EQU --X'80-'-- Aug. 1, 1979
Field Description, Contents, Meaning CP running status CP running status CP in wait state CP running user in RUNUSER CP executing stacked request
Reserved for IBM use
Processor is executing in supervisor state PSA System extending free storage if it is
equal to X'FP'. Note that XTNDLOCK is in
absolute PSA. Flag byte Virtual machine assist available on processoc Virtual machine assist is on for system CP processing shared named system page CP assist available on processor CP assist is on for system
wait time accounting flag
Timer contains idle time
Timer contains page wait time
Timer contains I/O wait time
Restart address if external interrupt marks
page invalid
Total number of page reads
Total number of page writes
Time spent in page wait, multiplied by numbec of pages waiting
Reserved for IBM use
Total number of user SVCs Page wait percent, last measurement Paging rate, pages per second
Note that PAGERATE is in absolute PSA. End of area cleared by DMKCPINT CP running identifier. Note that CPID is
in absolute PSA. CP abend code
start of save/restored code
Device address of system IPL device
Page steals/total replenished
Address of system VMBLOK Address of system printer file chain.
Address of system punch file chain.
Address of system reader file chain.
Address of system punch table.
Address of system printer table.
Address of system reader table.
Instruction processing address
Address of MSS volume
The MSS is online and the MSS communicator has been initialized
section 1. CP Data Areas and Control Blocks 73

Page of SY20-0884-3 As Updated Aug. lr 1979 by TNL SN25-0497 PSA Hexadecimal Field
Displacement Name
39C 3AO 3A4
3A8
3AC 380 3B4
3B8
3BC 3CO 3C4
3C8
3CC 3DO 3D4
3D8
3DC 3EO 3E4
3E8
3EC 3FO 3F4
3F8
3FC 400 ARSPAC DC AVMREAL DC ASYSABND DC ASYSLC DC ASYSOP DC ARIOCT DC
ARIOCH DC ARIOCU DC ARIODV DC ARIOCC DC
ARIoue DC ARIODC DC
ACORETBL DC
APAGCP DC CPCREGO DC
CPCREG6 DC
CPCREG8 DC TIMEDISP DS ASVCLIST DC AVMALIST DC LASTUSER DC PAGECUR DS MONNEXT DS PAGEND DS PAGENXT DS TRACEFLG DS v (DMKRSPAC) A (0) A (0) V (DMKSYSLC) V (DMKSYSOP) V (DMKRIOCT) V (DMKRIOCH) V CD MKRIOCU) V (DMKRIODV) V (DMKRIOCC) V (DMKRIOUC) V (DMKRIODC) V (DMKSYSCS) A(X'FFFFFF') X'808008CO' F'O' F'O' IF V (DMKSVCNS) V (DMKPRVMA) V (DMKSYSVM) IF IF IF IF IF Field Descriptionr Contentsr Meaning
Address of system accounting chain VMBLOK address of virtual=real user. Note
that AVMREAL is maintained in both PSAs Address of system abend printer
Address of SYSLOCS information
Address of system operator VMBLOK Address of real channel index table
Address of first ReHBLOK
-Address of first RCUBLOK Address of first RDEVBLOK Address of count of real system channels
Address of count of real system control units
Address of count of real system devices
Address of system CORTABLE
Address of first pageable program CP architecture control and external mask CP assist and virtual machine assist mask MONITOR CALL enable mask
Timer displacement for charge
Address of CP assist pointer list
Address of expanded virtual machine assist
pointer list
Last user to be dispatched
Current monitor buffer page address.
Note that PAGECUR is in absolute PSA. Next available address in monitor buffer.
Note that MONNEXT is in absolute PSA. Last address in current monitor buffer page.
Note that PAGEND is in absolute PSA. Alternate monitor buffer page address.
Note that PAGENXT is in absolute PSA. Trace table flags ORG TRACEFLG 400 401 402 404 408 40A 40C TRACFLGl DS lX Bii2 defined TRACO 1 EQU TRAC02 EQU TRAC03 EQU TRAC04 EQU TRAC05 EQU TRAC67 EQU TRAC08 EQU TRAC09 EQU TRACFLG2 DS Bii2 TRACOA EQU TRACOC EQU TRACOD EQU TRACBEF EQU TRAC10 EQU TRACll EQU TRAC12 EQU TRAC13 EQU TRACFLG3 DS TTSEGCNT DS CSADDR DC PSARSV DS PSARSV1 DS in TRACFLGl --XIsO-'-- X'40' X'20' l' 10' X'08' 1'04' 1'02' X'Ol' lX in TRACFLG2 --X'80-'-- X'40' X'20' X' 10' X'08' X'04' X' 02' X'Ol' lH IF H' 0 '
H
1F
Trace table flag
External interrupt tracing on SVC interrupt tracing on Program interrupt tracing on
Machine check tracing on I/O interrupt tracing on
FREE/FRET call tracing on
Enter dispatch tracing on
Queue drop tracing on
Trace table flag
Run user tracing on Unstack I/O interrupt tracing on
virtual CSW stored tracing on SIO r TIO r and HDV tracing on Unstack IOBLOK or TRQBLOK tracing on
Trace BTU activity for 370x NCP Lock spin tracing active Signal processor tracing active
Reserved for IBM use
Count of total page/swap tables in system.
Note that TTSEGCNT is in absolute PSA. P*7 Channel set address P*8 Reserved for IBM use
Reserved for IBM use 74 IBM VM/370 Data Areas and Control Block Logic

Page of SY20-0884-3 As Updated Aug. 1, 1979 by TNL SN25-0497 PSA Hexadecimal
Displacement
------------
688
68C 690 694
696
698
69A
69A
69B
69C
69D
69E
69F 6AO 6A4
6A8
Field
Name EMSPEND DC ]i!§ EMSPQUI EQU EMSPEXT EQU EMSPSYNC '1:'1"1" .LJ\lU EMSPSHD EQU EMSPCLKC EQU EMSINQSC EQU EMSREC DC Bi!§ defined EMSRQUI EQU EMSREXT EQU EMSRSYNC EQU EMSRSHD EQU EMSRCLKC EQU XCPEND DC Bi.i§ defined XCAPR EQU XCRES EQU XCWAK EQU XCDISP EQU IPUADDRX DC LPUADDR DC LPUADDRX DC APSTATUS DS ORG APSTAT1 DC Bit§ APUOPER EQU PROCIO EQU APUNONLN EQU MPFEAT EQU CSSFEAT EQU CPINITD EQU APSTAT2 DC ]i.i§ CPMCHLK EQU CPPTLBR EQU CPTERMLK DC CPFRELK DC FRLKPROC DC CPFRESW DC
AMCHAREA DC SHRLKCNT DC PROBSTRT DS F'O' in EMSPENI! X'80' X'40' X'20' x' 10' X'08' X'01' F'O' in EMS,EEC X'80' X'40' X'20' x' 10' X'08' F'O' in X'80' X'40' X'20' x' 10' H'O' H'O' H'O' 6X APSTATUS X'OO' in APS1ATj X'80' X'40' X'20' x' 10' X'02' X'01' X'OO' in !RSTATl x' 10' X'02' X'OO' X'OO' X'OO' X'OO' F'O' F'O' 1D
Field Description, Contents, Meaning
Emergency signal pending flags
Quiesce pending
Extend pending Synchronization pending Shutdown pending
High order TOD synchronization pending Processor is quiesced
Emergency signal received flags
Quiesce request received
Extend request received
Synchronization request received Shutdown request received
High order TOD synchronization received
External call pending flags
Automatic processor recovery pending
Resume request pending
Wakeup request pending
Dispatch request pending P*7 Processor address of other processor P*8 Logical address of this processor P*9 Logical address of other processor
Attached processor status bytes
Attached processor status
Attached processor operational
Processor has I/O capability System generated for attached processor mode
but running in uniprocessor mode
Multiprocessing feature is installed
Channel set switching feature installed System initialization complete Second flag byte
Machine check processing pending
(for ECP S only) PTLB required for processor DMKMCT system termination is in progress.
Note that CPTERMLK is in absolute PSA. Free storage extend pending.
Note that CPFRELK is in absolute PSA. Logical processor identification for CPFRELK. Note that FRLKPROC is in absolute PSA. DMKFRE must transfer execution to the
attached processor. Note that CPFRESW is in absolute PSA. Address of DMKMCH work area
Count of times CPSHRLK is set (used to clear CPSHRLK) Virtual machine time out queue at dispatch 76 VM/370 Data Areas and Control Block Logic

Auge 1, 1979 RCHBLOK RCH..BLOK contains status and type information for the specified channel. The linkage to I/O tasks operated on by that channel and to the control units attached to that channel
is also maintained. The ARIOCH field of the PSA points to the first RCHBLOK, which is
generated in contiguous storage. 0 8 10 18 20 Hexadecimal
Displacement
------------ 0 2
4
5
6 a C 10 11
12
13
14
18 1C 20 r- RCHADD I RCHLOCK R*1 R*2 RCHQCNT RCHFIOB RCHLIOB R*3 I R*4 I R*5 I R*6 RCHSTIDC BCHRSTQ RCHOPER L- Field
Name RCHADD DS RCHLOCK DS RCHSTAT DS Bit.§ RCHBUSY EQU RCHSCED EQU RCHDED EQU RCHTYPE DS Bi.!:.§ RCHSEL EQU RCHBMX EQU RCHMPX EQU RCH370 EQU RCHQCNT DS RCHFIOB DS RCHLIOB DS RCHDTCK DS RCHCCCK DS RCHIFCC DS RCHCHCK DS RCHSTIDC DS RCHRSTQ DS RCHOPER DS RCHCUTBL DS RCHSIZE EQU RCHCUTBL (Variable Length)
1H
1H 1X .!n x'ao' X'40' X'01' 1X in RCHTYPE --XIaO-'-- X'40' X'20' X'01' 1H
1F
1F 1X 1X 1X 1X 1F
1F
1F
32H
Field Description, Contents, Meaning Channel address Channel lock
R*1 Channel status Channel busy lOB scheduled on channel Channel dedicated
R*2 Channel type
R*3
R*4
R*5
R*6 Selector channel
Block multiplexer channel
Bvte multiplexer channel Si370 type-channel (S/370 110 instruction
support)
Number of IOBLOKs queued off channel
Pointer to first IOBLOK queued
Pointer to last IOBLOK queued Channel data check count Channel control check count
Interface control check count Channel chaining check count
Result of STIDC instruction issued
at CP initialization; if cc = 3, the
content is X'FFFFFFFF' Address of channel to be restarted IOBLOK operational on channel time Control units attached - RCUSTART index
(The index values must be by a and added to the beginning of the RDEVBLOK table (ARIODV).) (*-RCHBLOK}/8 RCHBLOK size in doublewords (X'OD') section 1. CP Data Areas and Control Blocks 81

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