Page of SY20-0884-3 As Updated Aug. 1, 1979 by TNL SN25-0497 MCHAREA
MCHAREA provides CP with statistical data that
processor, to its buffers, to processor storage
recovery of VM/370. relates to malfunctions
for damage assessment, r- 0 , MCHDAMLN MCHPROCA 1- MCHREC , , , 8 I MCHCPEX L*1 I//////MCHRESEV//////I I 10 M*1 I M*2 I M*3 M*4 M*5 I M*6 I M*7 I M*8 I I 18 MCHLSUM 1 40 N*1 1- N*2 I N*3 f N*4 N*5 N*6 I N*7 I N*8
48 MCHFSAR MCHFSAV 50 MCHFSEAV MCHPDARI
Hexadecimal Field
of the
and to
Displacement Name Field Description, Contents, Meaning
------------ -------------------------------------- 0 MCHDAMGE DS OH Damage assessment area 0 MCHDAMLN DS 1H Length of damage assessment area
2 MCHPROCA DS XL2 Processor address
4 MCHREC DS 1F Machine check record address
8 MCHCPEX DS 1F Machine check CPEXBLOK address
C MCHMODEL DS 1X L*1 Model number for the machine Bit§ defined ill MCH!llmEL MOD4341 EQU x' 18' ID number for the 4341 machine MOD4331 EQU X' 18' ID number for the 4331 machine MOD3033 EQU X t 14' ID number for the 3033 processor MOD3032 EQU X' 14' ID number for the 3032 processor MOD3031 EQU X' 14' ID number for the 3031 processor MODEL168 EQU X' 10' ID number for the 168 machine MODEL165 EQU X t 10' ID number for the 165 machine MODEL158 EQU X'OC' ID number for the 158 machine MODEL155 EQU X'OC' ID number for the 155 machine MODEL148 EQU X'08' ID number for the 148 machine MODEL 145 EQU X'08' ID number for the 145 machine MODEL 138 EQU X'04' ID number for the 138 machine MODEL135 EQU X'04' ID number for the 135 machine NOMODEL EQU X'OO' No support for machine
D MCHRESEV DS 3X Reserved for IBM use 10 MCHDAMFL DS OBL8 Damage assessment data 10 MCHFLAGO DS 1X M*1 System status
Bits de!i:ned ill MCHFLAGO MCHOHDWR EQU X'SQI- Hardware recovery MCHOSFTR EQU X'40' Software recovery MCHOUSAD EQU X'20' User abnormally terminated
MCH1GERR EQU X' 10' Channel inoperative MCHOTERM EQU X'08' Operating system termination MCHOQUIT EQU X' 04' Quiet mode in effect
34 IBM VM/370 Data Areas and Control Block Logic
real
the

Page of SY20-0884-3 As Updated Aug. 1, 1979 by TNL SN25-0497 PSA PSA is the primary contr.ol block. It controls CP and virtual machine activity. PSA contains the normal low IPL, logout, and PSW information; the processor model, type,
and features; and BALR and FREE areas. PSA also contains monitor and trace data and the
needed linkages to virtual machines, real devices, and spool files.
Note: All fields reside in real PSA unless otherwise specified. Fields residing in absolute PSA are specifically identified. For uniprocessor operation, real PSA equals
absolute PSA (or 0). If the system was running in AP mode when a catastrophic error
occurred, the Attached Processor will no longer be running. System recovery is in
uniprocessor mode and the real PSA will no longer be zero. Page 0, Machine Usage o IPLPSW IPLCCW1 10 IPLCCW2 EXOPSW 20 SVCOPSW PROPSW 30 MCOPSW IOOPSW 40 CSW CAW I Q.UANTUMR 50 TIMER I QUANTUM EXNPSW 60 SVCNPSW PRNPS W 70 MCNPS W IONPSW 80 CPU LOG 100 FXDLOG 160 FPRLOG 180 GPRLOG 1CO CRLOG 200 TEMPSAVE 240 BALRSAVE 280 FREESAVE 2COI FREEWORK 1-------------------------------------- 2FO DATE TODATE 300 STARTIME CPUID 310 IDLEWAIT PAGEWAIT 320 IONTWAIT PROBTIME 330 RUNPSW IRUNUSER IDSPLPSW --------------------------------------i 340 RUNCRO IRUNCR1 ICPSTAT ICPRESTRTI 350 PGREAD IPGWRITE PGWAITIM I 360 IIIIPGWAITPGIIIIIIIIPSASVCCT IP*1 tP*21 , , -, 370lCPID ICPABEND IP*3 IP*4 I ASYSVM I . 380lARSPPR IARSPPU IARSPRD I ARIOPU I 390lARIOPR IARIORD IP*S IP*6 IARSPAC t 3AO I AVMREAL I ASYSABND IASYSLC I ASYSOP I 3BO I AR IOCT !ARIOCH !ARlOCU IARIODV ! I I 3COIARIOCC IARIOUC ,ARlODC ,ACORETBL, I I 3DOIAPAGCP ICPCREGO ICPCREG6 ,CPCREG8 I I , 3EO TIMEDISP IASVCLIST IAVMALlST \ LASTUSERI I 3FO PAGECUR IMONNEXT I PAGEND \PAGENXT I I 400 TRACEFLG ITTSEGCNT IP*7 I P*8 IPSARSV1 I I 410 ALOKRF IALOKSY IPSARECPS 11111I1I11 '1/1111111 420 11111111111//I/PSARSV1511//II/I/I/III/1 430 INSTWRD1 IINSTWRD2 IINSTWRD3 I 440 \ Constants Pool I 4DO \ APTRLK INOADD IX40FFS I ,INSTWRD41 I I I \XRIGHT241 1------------------------------------ I IAFRET I 4EO, XPAGNUM !AFREE 1 ----------------------------------- I I X2048BNDI 4FO I AQCNWT IADSPCH IAPTRAN 1------------------- 5001 I 540 I i 5801 DUMPSAVE SIGSAVE LOKSAVE I I section 1. CP Data Areas and Control Blocks 69