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Programming Interface Information:
This information is NOT intended to be used as Programming Interfaces of z/VM. |
MCKBK
Control Block Contents
MCKBK DSECT
Cross Reference (Contains links to field and bit definitions)
MCKBK Prolog
NAME : HCPMCKBK
DESCRIPTION: MACHINE CHECK DESCRIPTOR BLOCK
DSECT : MCKBK
FUNCTION : THE MCKBK IS THE MAIN WORK AREA OF THE MACHINE-CHECK AND
CHECK-STOP HANDLERS. THE FIRST PART CONTAINS 'FOOTPRINT'
FLAGS, AND A LOCAL TRACE TABLE FOR MACHINE CHECKS, AND
OTHER STATUS FIELDS THAT MIGHT BE USEFUL IN DEBUGGING.
THIS FIRST PART OF THE MCKBK IS APPENDED TO (AND RECORDED
WITH) THE ERROR RECORD AND IS OCCASIONALLY REFERRED TO AS
THE 'DAMAGE ASSESSMENT AREA'. THE SECOND PART OF THE MCKBK
IS NOT REGARDED AS VALUABLE FOR DEBUGGING AND CONSEQUENTLY
IS NOT INCLUDED IN THE RECORDED ERROR RECORD. THIS PART
OF THE MCKBK IS SOMETIMES REFERRED TO AS THE 'MACHINE-CHECK
WORK AREA'.
DATA IS PLACED IN THE MCKBK AT THE START OF AN ERROR
INCIDENT (MACHINE CHECK OR CHECK-STOP) AND, FOR THE MOST
PART, IS NOT CLEARED UNTIL THE START OF THE NEXT INCIDENT.
LOCATED BY : A CPU'S MCKBK IS ANCHORED IN THE CPU'S PREFIX PAGE,
POINTED TO BY PFXMCHA.
CREATED BY : HCPMPS WHEN A PROCESSOR IS INITIALIZED. EACH CPU HAS
ONE OF THESE BLOCKS, ALLOCATED AT SYSTEM
INITIALIZATION TIME OR WHEN THE CPU IS VARIED
ONLINE.
NOTES : TO ACCOMODATE APPENDING THE MCKBK TO THE
ERROR RECORD (MCHREC), THE MCHREC AND THE MCKBK
ARE ALLOCATED FROM A SINGLE BLOCK OF STORAGE.
DELETED BY : HCPMPS TWO MINUTES AFTER A PROCESSOR IS VARIED OFFLINE.
RELOCATION CONSIDERATIONS : None
MCKBK Control Block Content
MCKBK DSECT
Hex Dec Type/Val Lng Label (dup) Comments ---- ---- --------- ---- -------------- -------- 0000 0 Structure MCKBK MACHINE CHECK DESCRIPTOR BLOCK 0000 0 Dbl-Word 8 MCKDAMAG (0) START OF DAMAGE ASSESSMENT AREA. 0000 0 Signed 2 MCKCNT2N COUNT OF SECONDARY MACHINE CHECKS SUBSEQUENT TO MOST RECENT PRIMARY. 0002 2 Signed 2 MCKCNTEQ COUNT OF CONSECUTIVE IDENTICAL MACHINE CHECKS (MCIC'S). WHEN THIS COUNT EXCEEDS A THRESHOLD (MCKTHLD1), ERROR RECORDING IS SUSPENDED (RECORDS ARE DISCARDED) UNTIL THE COUNT IS RESET. THE COUNT IS RESET WHEN A DIFFERENT MACHINE CHECK OCCURS. BUT EVEN WHEN THIS COUNT IS NOT SET, AN ERROR IS ALLOWED TO BE RECORDED ROUGHLY EVERY (MCKTIM1) SECONDS. 00000009 MCKTHLD1 9 THRESHOLD ASSOCIATED WITH MCKCNTEQ. 00000258 MCKTIM1 600 UNIT IS SECONDS, APPROX. (SEE MCKCNTEQ). 0004 4 Signed 2 MCKCNT COUNT OF RECENT MACHINE CHECKS. WHEN THIS COUNT EXCEEDS A THRESHOLD (MCKTHLD2), ERROR RECORDING IS SUSPENDED (RECORDS ARE DISCARDED) UNTIL THE COUNT IS RESET. THE COUNT IS RESET WHEN A MACHINE CHECK OCCURS AND AT LEAST (MCKTIM2) SECONDS HAVE ELAPSED SINCE THE LAST RESET. 0000000A MCKTHLD2 10 THRESHOLD ASSOCIATED WITH MCKCNT. 0000012C MCKTIM2 300 UNIT IS SECONDS, APPROX. (SEE MCKCNT). 0006 6 Signed 2 MCKHOTMK MASK OF RECENT ERROR CONDITIONS, THE 'OR' OF RECENT MACHINE CHECKS (MCIC BITS 0-15). 0008 8 Dbl-Word 8 MCKFLAGS (0) ENCOMPASSES THE FOLLOWING 8 FLAG BYTES. THIS LABEL IS USED TO RESET ALL 8 AS A GROUP. 0008 8 Bitstring 1 MCKFMISC MISCELLANEOUS STATUS FLAGS. 1... .... MCKFIXUP X'80' MCKFIXUP SOME PROGRESS WAS MADE TOWARD RECOVERY. (AT LEAST ONE ERROR WAS CORRECTED.) THIS FLAG IS NOT A MERE FOOTPRINT; IT MUST BE MAINTAINED VERY PRECISELY AND MUST NOT BE TURNED ON CASUALLY. IT MUST BE TURNED ON ONLY WHEN A PROBLEM HAS REALLY BEEN FIXED, OTHERWISE, IN THE CASE OF 'PROCESSING BACKUP' WE MAY END RETRYING A HOPELESS CASE ENDLESSLY. .1.. .... MCKFSIE X'40' MCKFSIE WE WERE RUNNING SIE (PFXHSIE WAS SET). ..1. .... MCKFHOT X'20' MCKFHOT INTERRUPT CLASSIFIED HOT. NOT REPORTED. 0009 9 Bitstring 1 * RESERVED FOR FUTURE IBM USE. 000A 10 Bitstring 1 MCKFETYP TYPE OF ERROR. .1.. .... MCKFERCS X'40' MCKFERCS ERROR WAS CHECK-STOP, NOT MACHINE CHECK. ..1. .... MCKF2ND X'20' MCKF2ND A SECONDARY ERROR OCCURRED WHILE HANDLING A MACHINE CHECK. ...1 .... MCKF2CS X'10' MCKF2CS SECONDARY ERROR WAS A CHECK-STOP. .... 1... MCKFMCIC X'08' MCKFMCIC INVALID MCIC (REQUIRED BITS MISSING). .... .1.. MCKFABND X'04' MCKFABND POSSIBLE SOFTWARE ERROR ENCOUNTERED. WHERE WE CANNOT ISSUE HCPABEND, WE SET THIS FLAG, THEN TERMINATE. 000B 11 Bitstring 1 MCKFTERM SYSTEM TERMINATION STATUS. 1... .... MCKFEMER X'80' MCKFEMER EMERGENCY HOST TERMINATION REQUIRED (AND OTHER FLAGS MAY BE MEANINGLESS). .1.. .... MCKFNOTM X'40' MCKFNOTM HOST TERMINATION NOT REQUIRED BY THE MACHINE-CHECK FLIH. ..1. .... MCKFDIE1 X'20' MCKFDIE1 HOST TERMINATION WAS REQUIRED BY THE MACHINE-CHECK FLIH. ...1 .... MCKFDIE2 X'10' MCKFDIE2 HOST TERMINATION WAS REQUIRED BY THE MACHINE-CHECK SLIH. .... 1... MCKFIPL X'08' MCKFIPL SOFT-RE-IPL AFTER TERMINATE DISALLOWED. .... .1.. MCKFIPLI X'04' MCKFIPLI SOFT-RE-IPL DISALLOWED BY IO SUB-SYSTEM. 000C 12 Bitstring 1 * RESERVED FOR FUTURE IBM USE. 000D 13 Bitstring 1 MCKFOOT5 FOOTPRINTS: MISCELLANEOUS. 1... .... MCKFVFIX X'80' MCKFVFIX VIRTUAL SIDE WAS TOLD DAMAGE WAS FIXED. .1.. .... MCKFZTOD X'40' MCKFZTOD FOUND TOD CLOCK BROKEN. TIMESTAMP IN MCHTOD AND IN TRACE ENTRY IS ALL FF'S. 000E 14 Bitstring 1 MCKFOOT6 FOOTPRINTS: CORRECTIVE ACTIONS TAKEN. 1... .... MCKFXCTL X'80' MCKFXCTL RE-ESTABLISHED HOST CONTROL REGISTERS. ..1. .... MCKFXCKC X'20' MCKFXCKC RE-ESTABLISHED CLOCK COMP'TOR (APPROX). ...1 .... MCKFXPT X'10' MCKFXPT RE-ESTABLISHED CPU TIMER (APPROX). .... 1... MCKFXTPR X'08' MCKFXTPR Re-established TOD Programmable Register 000F 15 Bitstring 1 MCKFOOT7 FOOTPRINTS: CORRECTIVE ACTIONS TAKEN. 1... .... MCKFATSK X'80' MCKFATSK ATTEMPTED TO RUN INTERRUPTED SYSTEM TASK TO COMPLETION. .1.. .... MCKFXTSK X'40' MCKFXTSK ATTEMPT TO COMPLETE INTERRUPTED SYSTEM TASK WAS SUCCESSFUL. ..1. .... MCKFRMOF X'20' MCKFRMOF MARKED FRAME TO BE TAKEN OFFLINE. ...1 .... MCKFXKEY X'10' MCKFXKEY RESTORED HOST STORAGE KEY. .... 1... MCKFXPAG X'08' MCKFXPAG ACTED TO REFRESH AN UNCHANGED GUEST PG. 0010 16 Dbl-Word 8 * (0) 0010 16 Bitstring 16 MCKCLKS (0) LABEL FOR MOVING BOTH CLOCKS AT ONCE. 0010 16 Dbl-Word 8 MCKCTIMR LOGGED OUT CPU TIMER. 0018 24 Dbl-Word 8 MCKCCOMP LOGGED OUT CLOCK COMPARATOR. 0020 32 Dbl-Word 8 MCKTRC (0) START OF LOCAL TRACE TABLE. THE ENTRIES IN THIS TABLE ARE DEFINED BY A REDEFINITION (ORG) OF MCKTRCUR (BELOW). 0020 32 Bitstring 16 MCKTRC1 OLDEST ENTRY IN TRACE TABLE. 0030 48 Bitstring 16 MCKTRC2 2ND OLDEST ENTRY IN TRACE TABLE. 0040 64 Bitstring 16 MCKTRC3 ETC. 0050 80 Bitstring 16 MCKTRC4 ETC. 0060 96 Bitstring 16 MCKTRCUR CURRENT (MOST RECENT) TRACE ENTRY. 00000070 MCKTRCZ * MARKS END OF TRACE TABLE. 0070 112 Signed 4 * RESERVED FOR FUTURE IBM USE. 0074 116 Signed 2 * RESERVED FOR FUTURE IBM USE. 0076 118 Signed 2 MCKCPUAD 'STAP' CPUID, FOR MSG'S ISSUED BY SLIH. 00000078 MCKDLEN *-MCKBK LENGTH OF DAMAGE ASSESSMENT AREA. 0000000F MCKDSIZE (MCKDLEN+7)/8 SIZE (DBLWDS) OF D.A. AREA. END OF DAMAGE ASSESSMENT AREA. THE ABOVE PORTION OF THE MCKBK IS APPENDED TO THE RECORDED MACHINE CHECK ERROR RECORD. START OF MACHINE CHECK WORK AREA. THE FOLLOWING PORTION OF THE MCKBK IS STRICTLY A WORK AREA AND IS NOT INCLUDED IN ERROR RECORD. 0078 120 Signed 4 MCKREC ADDRESS OF RECORDING RECORD (MCHREC). 007C 124 Bitstring 1 MCKFAILF FAILURE CLASSIFICATION CONTROL FLAGS 1... .... MCKSOMIN X'80' MCKSOMIN SOME HOST VALIDITY BITS ARE INVALID .1.. .... MCKFORCE X'40' MCKFORCE This failure must be forced to hard ...1 .... MCKHARD X'10' MCKHARD HARD FAILURE WAS ENCOUNTERED .... 1... MCKDEGRP X'08' MCKDEGRP DEGRADE FAILURE TO PASS TO GUEST .... .1.. MCKDEGRN X'04' MCKDEGRN DEGRADE FAILURE NOT TO PASS TO GUEST .... ..1. MCKPASS X'02' MCKPASS FAILURE TO BE PASSED TO GUEST .... ...1 MCKSOFT X'01' MCKSOFT SOFT FAILURE WAS ENCOUNTERED 007D 125 Bitstring 1 MCKRECFL Machine Check Recording Checks Flags 1... .... MCKCPREC X'80' MCKCPREC CP will record this error check record .1.. .... MCKLFREC X'40' MCKLFREC The machine check handler is looking for virtual machine to record the machine check record . 007E 126 Bitstring 1 MCKIACR Saved PFXIACR 007F 127 Bitstring 1 MCKIACE Saved PFXIACE 0080 128 Signed 4 MCKHNDL2 ADDRESS POINTING TO A SECONDARY MACHINE CHECK HANDLER, OR ZERO IF THE PRIMARY HANDLER IS TO HANDLE THE MACHINE CHECK. 0084 132 Signed 4 MCKC14SV VALUE IN CR14 PRIOR TO MACHINE CHECK. 0088 136 Signed 4 MCKTODR2 1ST 4 BYTES OF TOD AT LAST MCKCNT RESET. 008C 140 Signed 4 MCKTODR1 1ST 4 OF TOD AT LAST MCKCNTEQ OVERRIDE. 0090 144 Bitstring 1 MCKCLEAR (0) WE ZERO ALL FIELDS BETWEEN HERE AND MCKEND (AND A FEW OF THE PRECEEDING FIELDS AS WELL) WHEN WE START PROCESSING A PRIMARY MACHINE CHECK. 0090 144 Dbl-Word 8 MCKHIC (0) WORKING MCIC FOR HOST. THIS STARTS OUT AS A COPY OF THE REAL MCIC, THEN WE ALTER THE VALIDITY BITS IN IT AS WE CORRECT DAMAGE OR DISCOVER MORE DAMAGE. IT'S VALIDITY BITS MAINTAIN A RUNNING SCORE, AS WE GO THRU THE MACHINE-CHECK HANDLER, OF WHAT ENTITIES REMAIN DAMAGED. 0090 144 Bitstring 1 MCKHIC0 HOST WORKING COPY, MCIC BYTE 0. 1111 1111 MCIPRIM0 X'FF' MCIPRIM0 PRIMARY MACHINE CHECK BITS - BYTE 0 1... .... MCICSD X'80' MCICSD SYSTEM DAMAGE BIT. .1.. .... MCICPD X'40' MCICPD PROCESSING DAMAGE BIT. ..1. .... MCICSR X'20' MCICSR SYSTEM RECOVERY BIT. ...1 .... MCICITD X'10' MCICITD INTERVAL TIMER DAMAGE. (370 GUESTS) .... 1... MCICCD X'08' MCICCD TIMING (CLOCK) FACILITY DAMAGE. .... .1.. MCICED X'04' MCICED EXTERNAL DAMAGE. .... ...1 MCICDG X'01' MCICDG DEGRADATION BIT. 0091 145 Bitstring 1 MCKHIC1 HOST WORKING COPY, MCIC BYTE 1. 1111 .... MCIPRIM1 X'F0' MCIPRIM1 PRIMARY MACHINE CHECK BITS - BYTE 1 1... .... MCICW X'80' MCICW WARNING BIT. .1.. .... MCICCRW X'40' MCICCRW PENDING-CRW REPORT. ..1. .... MCICSP X'20' MCICSP SERVICE PROCESSOR DAMAGE. ...1 .... MCICCSD X'10' MCICCSD CHANNEL-SUBSYSTEM DAMAGE. .... ..1. MCICBU X'02' MCICBU 'BACKED UP' BIT. .... ...1 MCICDL X'01' MCICDL 'DELAYED' BIT. (370 GUESTS) 0092 146 Bitstring 1 MCKHIC2 HOST WORKING COPY, MCIC BYTE 2. 1... .... MCICSE X'80' MCICSE STORAGE ERROR UNCORRECTED. .1.. .... MCICSC X'40' MCICSC STORAGE ERROR CORRECTED. ..1. .... MCICKE X'20' MCICKE STORAGE-KEY ERROR UNCORRECTED. ...1 .... MCICSDG X'10' MCICSDG STORAGE DEGRADATION. MODIFIES STORAGE ERROR CORRECTED. .... 1... MCICVWP X'08' MCICVWP BITS 12-15 OF MC OLD PSW VALID. .... .1.. MCICVMS X'04' MCICVMS SYSTEM MASK & KEY OF MC OLD PSW VALID. .... ..1. MCICVPM X'02' MCICVPM PROGRAM MASK & CC OF MC OLD PSW VALID. .... ...1 MCICVIA X'01' MCICVIA INSTR ADDR OF MC OLD PSW IS VALID. 0093 147 Bitstring 1 MCKHIC3 HOST WORKING COPY, MCIC BYTE 3. 1... .... MCICVFA X'80' MCICVFA FAILING STORAGE ADDRESS IS VALID. ..1. .... MCICVED X'20' MCICVED EXTERNAL-DAMAGE CODE IS VALID. ...1 .... MCICVFP X'10' MCICVFP FP REGISTERS STORED ARE VALID. .... 1... MCICVGR X'08' MCICVGR GP REGISTERS STORED ARE VALID. .... .1.. MCICVCR X'04' MCICVCR CONTROL REGISTERS STORED VALID. .... ..1. MCICVLG X'02' MCICVLG EXTENDED LOGOUT AREA IS VALID. .... ...1 MCICVST X'01' MCICVST INST. MODIFIED STORAGE IS VALID. 0094 148 Bitstring 1 MCKHIC4 HOST WORKING COPY, MCIC BYTE 4. 0095 149 Bitstring 1 MCKHIC5 HOST WORKING COPY, MCIC BYTE 5. ..1. .... MCICVTPR X'20' MCICVTPR TOD programmable register validity ...1 .... MCICVXFP X'10' MCICVXFP Additional FP Registers Validity (ESA390) FP Control Register Validity (zArch) .... 1... MCICAR X'08' MCICAR Ancillary Report Bit .... ..1. MCICVCT X'02' MCICVCT CPU TIMER STORED IS VALID. .... ...1 MCICVCC X'01' MCICVCC CLOCK COMPARATOR STORED IS VALID. 0096 150 Signed 2 MCKHIC6 HOST WORKING COPY, MCIC BYTES 6 & 7. 0098 152 Dbl-Word 8 MCKGIC (0) WORKING MCIC FOR GUEST. THIS STARTS OUT AS A COPY OF THE REAL MCIC, THEN WE ALTER THE VALIDITY BITS IN IT AS WE CORRECT DAMAGE OR DISCOVER MORE DAMAGE. IT'S VALIDITY BITS MAINTAIN A RUNNING SCORE, AS WE GO THRU THE MACHINE-CHECK HANDLER, OF WHAT ENTITIES REMAIN DAMAGED. 0098 152 Bitstring 1 MCKGIC0 GUEST WORKING COPY, MCIC BYTE 0. 1111 1111 MCIPRIM0 X'FF' MCIPRIM0 PRIMARY MACHINE CHECK BITS - BYTE 0 1... .... MCICSD X'80' MCICSD SYSTEM DAMAGE BIT. .1.. .... MCICPD X'40' MCICPD PROCESSING DAMAGE BIT. ..1. .... MCICSR X'20' MCICSR SYSTEM RECOVERY BIT. ...1 .... MCICITD X'10' MCICITD INTERVAL TIMER DAMAGE. (370 GUESTS) .... 1... MCICCD X'08' MCICCD TIMING (CLOCK) FACILITY DAMAGE. .... .1.. MCICED X'04' MCICED EXTERNAL DAMAGE. .... ...1 MCICDG X'01' MCICDG DEGRADATION BIT. 0099 153 Bitstring 1 MCKGIC1 GUEST WORKING COPY, MCIC BYTE 1. 1111 .... MCIPRIM1 X'F0' MCIPRIM1 PRIMARY MACHINE CHECK BITS - BYTE 1 1... .... MCICW X'80' MCICW WARNING BIT. .1.. .... MCICCRW X'40' MCICCRW PENDING-CRW REPORT. ..1. .... MCICSP X'20' MCICSP SERVICE PROCESSOR DAMAGE. ...1 .... MCICCSD X'10' MCICCSD CHANNEL-SUBSYSTEM DAMAGE. .... ..1. MCICBU X'02' MCICBU 'BACKED UP' BIT. .... ...1 MCICDL X'01' MCICDL 'DELAYED' BIT. (370 GUESTS) 009A 154 Bitstring 1 MCKGIC2 GUEST WORKING COPY, MCIC BYTE 2. 1... .... MCICSE X'80' MCICSE STORAGE ERROR UNCORRECTED. .1.. .... MCICSC X'40' MCICSC STORAGE ERROR CORRECTED. ..1. .... MCICKE X'20' MCICKE STORAGE-KEY ERROR UNCORRECTED. ...1 .... MCICSDG X'10' MCICSDG STORAGE DEGRADATION. MODIFIES STORAGE ERROR CORRECTED. .... 1... MCICVWP X'08' MCICVWP BITS 12-15 OF MC OLD PSW VALID. .... .1.. MCICVMS X'04' MCICVMS SYSTEM MASK & KEY OF MC OLD PSW VALID. .... ..1. MCICVPM X'02' MCICVPM PROGRAM MASK & CC OF MC OLD PSW VALID. .... ...1 MCICVIA X'01' MCICVIA INSTR ADDR OF MC OLD PSW IS VALID. 009B 155 Bitstring 1 MCKGIC3 GUEST WORKING COPY, MCIC BYTE 3. 1... .... MCICVFA X'80' MCICVFA FAILING STORAGE ADDRESS IS VALID. ..1. .... MCICVED X'20' MCICVED EXTERNAL-DAMAGE CODE IS VALID. ...1 .... MCICVFP X'10' MCICVFP FP REGISTERS STORED ARE VALID. .... 1... MCICVGR X'08' MCICVGR GP REGISTERS STORED ARE VALID. .... .1.. MCICVCR X'04' MCICVCR CONTROL REGISTERS STORED VALID. .... ..1. MCICVLG X'02' MCICVLG EXTENDED LOGOUT AREA IS VALID. .... ...1 MCICVST X'01' MCICVST INST. MODIFIED STORAGE IS VALID. 009C 156 Bitstring 1 MCKGIC4 GUEST WORKING COPY, MCIC BYTE 4. 009D 157 Bitstring 1 MCKGIC5 GUEST WORKING COPY, MCIC BYTE 5. ..1. .... MCICVTPR X'20' MCICVTPR TOD programmable register validity ...1 .... MCICVXFP X'10' MCICVXFP Additional FP Registers Validity (ESA390) FP Control Register Validity (zArch) .... 1... MCICAR X'08' MCICAR Ancillary Report Bit .... ..1. MCICVCT X'02' MCICVCT CPU TIMER STORED IS VALID. .... ...1 MCICVCC X'01' MCICVCC CLOCK COMPARATOR STORED IS VALID. 009E 158 Signed 2 MCKGIC6 GUEST WORKING COPY, MCIC BYTES 6 & 7. 00A0 160 Signed 4 MCKHXDC (0) Host external damage code 00A0 160 Bitstring 1 MCKHXDC0 Byte 0 of the external damage code .... .... MCEXTD0 X'00' MCEXTD0 No bits defined 00A1 161 Bitstring 1 MCKHXDC1 Byte 1 of the external damage code .... .... MCEXTD1 X'00' MCEXTD1 No bits defined 00A2 162 Bitstring 1 MCKHXDC2 Byte 2 of the external damage code ...1 .... MCEXTDSC X'10' MCEXTDSC Bit 19 - ETR Sync check 00A3 163 Bitstring 1 MCKHXDC3 Byte 3 of the external damage code 1... .... MCEXTDSS X'80' MCEXTDSS Bit 24 - STP Sync Check .1.. .... MCEXTDIC X'40' MCEXTDIC Bit 25 - Island Condition ..1. .... MCEXTDCC X'20' MCEXTDCC Bit 26 - CTN Configuration Change ...1 .... MCEXTDCS X'10' MCEXTDCS Bit 27 - STP Clock Source Error 00A4 164 Signed 4 MCKGXDC (0) Guest external damage code 00A4 164 Bitstring 1 MCKGXDC0 Byte 0 of the external damage code .... .... MCEXTD0 X'00' MCEXTD0 No bits defined 00A5 165 Bitstring 1 MCKGXDC1 Byte 1 of the external damage code .... .... MCEXTD1 X'00' MCEXTD1 No bits defined 00A6 166 Bitstring 1 MCKGXDC2 Byte 2 of the external damage code ...1 .... MCEXTDSC X'10' MCEXTDSC Bit 19 - ETR Sync check 00A7 167 Bitstring 1 MCKGXDC3 Byte 3 of the external damage code 1... .... MCEXTDSS X'80' MCEXTDSS Bit 24 - STP Sync Check .1.. .... MCEXTDIC X'40' MCEXTDIC Bit 25 - Island Condition ..1. .... MCEXTDCC X'20' MCEXTDCC Bit 26 - CTN Configuration Change ...1 .... MCEXTDCS X'10' MCEXTDCS Bit 27 - STP Clock Source Error 00A8 168 Dbl-Word 8 * (0) 00A8 168 Bitstring 64 MCKMCHSV (0) SAVE AREA FOR HCPMCH AND HCPMCS USE ONLY 00A8 168 Signed 4 MCKMCHR0 SAVE REGISTER 0. 00AC 172 Signed 4 MCKMCHR1 SAVE REGISTER 1. 00B0 176 Signed 4 MCKMCHR2 SAVE REGISTER 2. 00B4 180 Signed 4 MCKMCHR3 SAVE REGISTER 3. 00B8 184 Signed 4 MCKMCHR4 SAVE REGISTER 4. 00BC 188 Signed 4 MCKMCHR5 SAVE REGISTER 5. 00C0 192 Signed 4 MCKMCHR6 SAVE REGISTER 6. 00C4 196 Signed 4 MCKMCHR7 SAVE REGISTER 7. 00C8 200 Signed 4 MCKMCHR8 SAVE REGISTER 8. 00CC 204 Signed 4 MCKMCHR9 SAVE REGISTER 9. 00D0 208 Signed 4 MCKMCHRA SAVE REGISTER 10. 00D4 212 Signed 4 MCKMCHRB SAVE REGISTER 11. 00D8 216 Signed 4 MCKMCHRC SAVE REGISTER 12. 00DC 220 Signed 4 MCKMCHRD SAVE REGISTER 13. 00E0 224 Signed 4 MCKMCHRE SAVE REGISTER 14. 00E4 228 Signed 4 MCKMCHRF SAVE REGISTER 15. 00E8 232 Bitstring 64 MCKMCHHI (0) Space for high halves of the regs when stored discontinguously. 00E8 232 Signed 4 MCKMCHH0 High Register 0 00EC 236 Signed 4 MCKMCHH1 High Register 1 00F0 240 Signed 4 MCKMCHH2 High Register 2 00F4 244 Signed 4 MCKMCHH3 High Register 3 00F8 248 Signed 4 MCKMCHH4 High Register 4 00FC 252 Signed 4 MCKMCHH5 High Register 5 0100 256 Signed 4 MCKMCHH6 High Register 6 0104 260 Signed 4 MCKMCHH7 High Register 7 0108 264 Signed 4 MCKMCHH8 High Register 8 010C 268 Signed 4 MCKMCHH9 High Register 9 0110 272 Signed 4 MCKMCHHA High Register 10 0114 276 Signed 4 MCKMCHHB High Register 11 0118 280 Signed 4 MCKMCHHC High Register 12 011C 284 Signed 4 MCKMCHHD High Register 13 0120 288 Signed 4 MCKMCHHE High Register 14 0124 292 Signed 4 MCKMCHHF High Register 15 00A8 168 Bitstring 128 MCKMCHSG (0) Large register savearea for MCH/MCS only when storage continguously. 00A8 168 Signed 8 MCKMCHG0 Save register 0 00B0 176 Signed 8 MCKMCHG1 Save register 1 00B8 184 Signed 8 MCKMCHG2 Save register 2 00C0 192 Signed 8 MCKMCHG3 Save register 3 00C8 200 Signed 8 MCKMCHG4 Save register 4 00D0 208 Signed 8 MCKMCHG5 Save register 5 00D8 216 Signed 8 MCKMCHG6 Save register 6 00E0 224 Signed 8 MCKMCHG7 Save register 7 00E8 232 Signed 8 MCKMCHG8 Save register 8 00F0 240 Signed 8 MCKMCHG9 Save register 9 00F8 248 Signed 8 MCKMCHGA Save register 10 0100 256 Signed 8 MCKMCHGB Save register 11 0108 264 Signed 8 MCKMCHGC Save register 12 0110 272 Signed 8 MCKMCHGD Save register 13 0118 280 Signed 8 MCKMCHGE Save register 14 0120 288 Signed 8 MCKMCHGF Save register 15 0128 296 Signed 8 MCKGMSG (0) Machine check message buffer 0128 296 Signed 4 MCKMSG (0) MACHINE CHECK MESSAGE BUFFER. 0128 296 Character 6 MCKHDR FIXED MESSAGE HEADER. 012E 302 Character 68 MCKTEXT Variable message text. 0172 370 Bitstring 1 MCK824CD IDENTIFIES TEXT FOR MSG MCH824E. 0173 371 Bitstring 1 MCK825CD IDENTIFIES TEXT FOR MSG MCH825E. 0174 372 Signed 4 MCKMCVBK Address of (copy of) MCVBK 0178 376 Signed 4 MCKWNSKP Address of VMDBK already presented with the machine check. 017C 380 Signed 4 MCKPXCR5 Savearea for PFXCPCR5. 0180 384 Dbl-Word 8 MCKPXCR1G Savearea for PFXCPCR1G. 0188 392 Bitstring 1 MCKEND (0) END OF MCKAREA. 00000188 MCKLEN *-MCKBK LENGTH (BYTES) OF MCKBK. 00000031 MCKSIZE (MCKLEN+7)/8 SIZE (DBLWDS) OF MCKBK. 0060 96 Bitstring 6 MCKTRCIC (0) Bytes 0-5 of MCIC. 0060 96 Bitstring 2 MCKTRCI0 Bytes 0-1 of MCIC. 0062 98 Bitstring 4 MCKTRCI2 Bytes 2-5 of MCIC. 0066 102 Bitstring 1 MCKTRCF1 BIT FLAGS OF LOCAL TRACE TABLE ENTRY. 1... .... MCKTRCPM X'80' MCKTRCPM PRIMARY (NOT 2NDARY) MCH-CHK OR CHK-STP. .1.. .... MCKTRCCS X'40' MCKTRCCS ERROR WAS CHECK-STOP, NOT MACHINE CHK. .... ...1 MCKTRCSI X'01' MCKTRCSI PFXHSIE FLAG WAS ON (RUNNING IN SIE). 0067 103 Bitstring 1 * RESERVED FOR FUTURE IBM USE. 0068 104 Signed 4 MCKTRCTD 1ST 4 BYTES FROM TOD CLOCK. (THIS IS STORED ONLY IN PRIMARY ENTRIES, NOT SECONDARY.) 006C 108 Signed 4 MCKTRCIA INSTRUCTION ADDRESS FROM MCH OLD PSW. Save orginal Program new PSW for VOP interception 00E0 224 Dbl-Word 8 MCKOPNP Saved original Program new PSW 00D8 216 Bitstring 16 MCKOGPNP z/Arch original Program New PSW
MCKBK Storage Layout
*** MCKBK - MACHINE CHECK DESCRIPTOR BLOCK
*
* +-------------+-------------+-------------+-------------+
* 0 | MCKCNT2N | MCKCNTEQ | MCKCNT | MCKHOTMK |
* +------+------+------+------+------+------+------+------+
* 8 |:FMISC|//////|:FETYP|:FTERM|//////|:FOOT5|:FOOT6|:FOOT7|
* +------+------+------+------+------+------+------+------+
* 10 | MCKCTIMR |
* +-------------------------------------------------------+
* 18 | MCKCCOMP |
* +-------------------------------------------------------+
* 20 | MCKTRC1 |
* | |
* +-------------------------------------------------------+
* 30 | MCKTRC2 |
* | |
* +-------------------------------------------------------+
* 40 | MCKTRC3 |
* | |
* +-------------------------------------------------------+
* 50 | MCKTRC4 |
* | |
* +-------------------------------------------------------+
* 60 | MCKTRCUR |
* | |
* +---------------------------+-------------+-------------+
* 70 |///////////////////////////|/////////////| MCKCPUAD |
* +---------------------------+------+------+------+------+
* 78 | MCKREC |:FAILF|:RECFL|:IACR |:IACE |
* +---------------------------+------+------+------+------+
* 80 | MCKHNDL2 | MCKC14SV |
* +---------------------------+---------------------------+
* 88 | MCKTODR2 | MCKTODR1 |
* +------+------+------+------+------+------+-------------+
* 90 |:HIC0 |:HIC1 |:HIC2 |:HIC3 |:HIC4 |:HIC5 | MCKHIC6 |
* +------+------+------+------+------+------+-------------+
* 98 |:GIC0 |:GIC1 |:GIC2 |:GIC3 |:GIC4 |:GIC5 | MCKGIC6 |
* +------+------+------+------+------+------+------+------+
* A0 |:HXDC0|:HXDC1|:HXDC2|:HXDC3|:GXDC0|:GXDC1|:GXDC2|:GXDC3|
* +------+------+------+------+------+------+------+------+
* A8 | MCKMCHR0 | MCKMCHR1 |
* +---------------------------+---------------------------+
* B0 | MCKMCHR2 | MCKMCHR3 |
* +---------------------------+---------------------------+
* B8 | MCKMCHR4 | MCKMCHR5 |
* +---------------------------+---------------------------+
* C0 | MCKMCHR6 | MCKMCHR7 |
* +---------------------------+---------------------------+
* C8 | MCKMCHR8 | MCKMCHR9 |
* +---------------------------+---------------------------+
* D0 | MCKMCHRA | MCKMCHRB |
* +---------------------------+---------------------------+
* D8 | MCKMCHRC | MCKMCHRD |
* +---------------------------+---------------------------+
* E0 | MCKMCHRE | MCKMCHRF |
* +---------------------------+---------------------------+
* E8 | MCKMCHH0 | MCKMCHH1 |
* +---------------------------+---------------------------+
* F0 | MCKMCHH2 | MCKMCHH3 |
* +---------------------------+---------------------------+
* F8 | MCKMCHH4 | MCKMCHH5 |
* +---------------------------+---------------------------+
* 100 | MCKMCHH6 | MCKMCHH7 |
* +---------------------------+---------------------------+
* 108 | MCKMCHH8 | MCKMCHH9 |
* +---------------------------+---------------------------+
* 110 | MCKMCHHA | MCKMCHHB |
* +---------------------------+---------------------------+
* 118 | MCKMCHHC | MCKMCHHD |
* +---------------------------+---------------------------+
* 120 | MCKMCHHE | MCKMCHHF |
* +---------------------------+---------------------------+
* 128
*
*** MCKBK - MACHINE CHECK DESCRIPTOR BLOCK
*** Overlay for MCKMCHSV in MCKBK
*
* +-------------------------------------------------------+
* A8 | MCKMCHG0 |
* +-------------------------------------------------------+
* B0 | MCKMCHG1 |
* +-------------------------------------------------------+
* B8 | MCKMCHG2 |
* +-------------------------------------------------------+
* C0 | MCKMCHG3 |
* +-------------------------------------------------------+
* C8 | MCKMCHG4 |
* +-------------------------------------------------------+
* D0 | MCKMCHG5 |
* +-------------------------------------------------------+
* D8 | MCKMCHG6 |
* +-------------------------------------------------------+
* E0 | MCKMCHG7 |
* +-------------------------------------------------------+
* E8 | MCKMCHG8 |
* +-------------------------------------------------------+
* F0 | MCKMCHG9 |
* +-------------------------------------------------------+
* F8 | MCKMCHGA |
* +-------------------------------------------------------+
* 100 | MCKMCHGB |
* +-------------------------------------------------------+
* 108 | MCKMCHGC |
* +-------------------------------------------------------+
* 110 | MCKMCHGD |
* +-------------------------------------------------------+
* 118 | MCKMCHGE |
* +-------------------------------------------------------+
* 120 | MCKMCHGF |
* +-----------------------------------------+-------------+
* 128 | MCKHDR | |
* +-----------------------------------------+ |
* 130 | |
* = MCKTEXT =
* | +------+------+---------------------------+
* 170 | |:824CD|:825CD| MCKMCVBK |
* +-------------+------+------+---------------------------+
* 178 | MCKWNSKP | MCKPXCR5 |
* +---------------------------+---------------------------+
* 180 | MCKPXCR1G |
* +-------------------------------------------------------+
*
*** Overlay for MCKMCHSV in MCKBK
*** Overlay for MCKTRCUR in MCKBK
*
* +-------------+---------------------------+------+------+
* 60 | MCKTRCI0 | MCKTRCI2 |:TRCF1|//////|
* +-------------+-------------+-------------+------+------+
* 68 | MCKTRCTD | MCKTRCIA |
* +---------------------------+---------------------------+
* 70
*
*** Overlay for MCKTRCUR in MCKBK
*** Overlay for MCKMCHRE in MCKBK
*
* +-------------------------------------------------------+
* E0 | MCKOPNP |
* +-------------------------------------------------------+
* E8
*
*** Overlay for MCKMCHRE in MCKBK
*** Overlay for MCKMCHRC in MCKBK
*
* +-------------------------------------------------------+
* D8 | MCKOGPNP |
* | |
* +-------------------------------------------------------+
* E8
*
*** Overlay for MCKMCHRC in MCKBK
MCKBK Cross Reference
Symbol Dspl Value -------------- ---- ----- MCEXTDCC 00A3 20 MCEXTDCC 00A7 20 MCEXTDCS 00A3 10 MCEXTDCS 00A7 10 MCEXTDIC 00A3 40 MCEXTDIC 00A7 40 MCEXTDSC 00A2 10 MCEXTDSC 00A6 10 MCEXTDSS 00A3 80 MCEXTDSS 00A7 80 MCEXTD0 00A0 00 MCEXTD0 00A4 00 MCEXTD1 00A1 00 MCEXTD1 00A5 00 MCICAR 0095 08 MCICAR 009D 08 MCICBU 0091 02 MCICBU 0099 02 MCICCD 0090 08 MCICCD 0098 08 MCICCRW 0091 40 MCICCRW 0099 40 MCICCSD 0091 10 MCICCSD 0099 10 MCICDG 0090 01 MCICDG 0098 01 MCICDL 0091 01 MCICDL 0099 01 MCICED 0090 04 MCICED 0098 04 MCICITD 0090 10 MCICITD 0098 10 MCICKE 0092 20 MCICKE 009A 20 MCICPD 0090 40 MCICPD 0098 40 MCICSC 0092 40 MCICSC 009A 40 MCICSD 0090 80 MCICSD 0098 80 MCICSDG 0092 10 MCICSDG 009A 10 MCICSE 0092 80 MCICSE 009A 80 MCICSP 0091 20 MCICSP 0099 20 MCICSR 0090 20 MCICSR 0098 20 MCICVCC 0095 01 MCICVCC 009D 01 MCICVCR 0093 04 MCICVCR 009B 04 MCICVCT 0095 02 MCICVCT 009D 02 MCICVED 0093 20 MCICVED 009B 20 MCICVFA 0093 80 MCICVFA 009B 80 MCICVFP 0093 10 MCICVFP 009B 10 MCICVGR 0093 08 MCICVGR 009B 08 MCICVIA 0092 01 MCICVIA 009A 01 MCICVLG 0093 02 MCICVLG 009B 02 MCICVMS 0092 04 MCICVMS 009A 04 MCICVPM 0092 02 MCICVPM 009A 02 MCICVST 0093 01 MCICVST 009B 01 MCICVTPR 0095 20 MCICVTPR 009D 20 MCICVWP 0092 08 MCICVWP 009A 08 MCICVXFP 0095 10 MCICVXFP 009D 10 MCICW 0091 80 MCICW 0099 80 MCIPRIM0 0090 FF MCIPRIM0 0098 FF MCIPRIM1 0091 F0 MCIPRIM1 0099 F0 MCKCCOMP 0018 MCKCLEAR 0090 MCKCLKS 0010 MCKCNT 0004 MCKCNTEQ 0002 MCKCNT2N 0000 MCKCPREC 007D 80 MCKCPUAD 0076 MCKCTIMR 0010 MCKC14SV 0084 MCKDAMAG 0000 MCKDEGRN 007C 04 MCKDEGRP 007C 08 MCKDLEN 0076 00000078 MCKDSIZE 0076 0000000F MCKEND 0188 MCKFABND 000A 04 MCKFAILF 007C MCKFATSK 000F 80 MCKFDIE1 000B 20 MCKFDIE2 000B 10 MCKFEMER 000B 80 MCKFERCS 000A 40 MCKFETYP 000A MCKFHOT 0008 20 MCKFIPL 000B 08 MCKFIPLI 000B 04 MCKFIXUP 0008 80 MCKFLAGS 0008 MCKFMCIC 000A 08 MCKFMISC 0008 MCKFNOTM 000B 40 MCKFOOT5 000D MCKFOOT6 000E MCKFOOT7 000F MCKFORCE 007C 40 MCKFRMOF 000F 20 MCKFSIE 0008 40 MCKFTERM 000B MCKFVFIX 000D 80 MCKFXCKC 000E 20 MCKFXCTL 000E 80 MCKFXKEY 000F 10 MCKFXPAG 000F 08 MCKFXPT 000E 10 MCKFXTPR 000E 08 MCKFXTSK 000F 40 MCKFZTOD 000D 40 MCKF2CS 000A 10 MCKF2ND 000A 20 MCKGIC 0098 MCKGIC0 0098 MCKGIC1 0099 MCKGIC2 009A MCKGIC3 009B MCKGIC4 009C MCKGIC5 009D MCKGIC6 009E MCKGMSG 0128 MCKGXDC 00A4 MCKGXDC0 00A4 MCKGXDC1 00A5 MCKGXDC2 00A6 MCKGXDC3 00A7 MCKHARD 007C 10 MCKHDR 0128 MCKHIC 0090 MCKHIC0 0090 MCKHIC1 0091 MCKHIC2 0092 MCKHIC3 0093 MCKHIC4 0094 MCKHIC5 0095 MCKHIC6 0096 MCKHNDL2 0080 MCKHOTMK 0006 MCKHXDC 00A0 MCKHXDC0 00A0 MCKHXDC1 00A1 MCKHXDC2 00A2 MCKHXDC3 00A3 MCKIACE 007F MCKIACR 007E MCKLEN 0188 00000188 MCKLFREC 007D 40 MCKMCHGA 00F8 MCKMCHGB 0100 MCKMCHGC 0108 MCKMCHGD 0110 MCKMCHGE 0118 MCKMCHGF 0120 MCKMCHG0 00A8 MCKMCHG1 00B0 MCKMCHG2 00B8 MCKMCHG3 00C0 MCKMCHG4 00C8 MCKMCHG5 00D0 MCKMCHG6 00D8 MCKMCHG7 00E0 MCKMCHG8 00E8 MCKMCHG9 00F0 MCKMCHHA 0110 MCKMCHHB 0114 MCKMCHHC 0118 MCKMCHHD 011C MCKMCHHE 0120 MCKMCHHF 0124 MCKMCHHI 00E8 MCKMCHH0 00E8 MCKMCHH1 00EC MCKMCHH2 00F0 MCKMCHH3 00F4 MCKMCHH4 00F8 MCKMCHH5 00FC MCKMCHH6 0100 MCKMCHH7 0104 MCKMCHH8 0108 MCKMCHH9 010C MCKMCHRA 00D0 MCKMCHRB 00D4 MCKMCHRC 00D8 MCKMCHRD 00DC MCKMCHRE 00E0 MCKMCHRF 00E4 MCKMCHR0 00A8 MCKMCHR1 00AC MCKMCHR2 00B0 MCKMCHR3 00B4 MCKMCHR4 00B8 MCKMCHR5 00BC MCKMCHR6 00C0 MCKMCHR7 00C4 MCKMCHR8 00C8 MCKMCHR9 00CC MCKMCHSG 00A8 MCKMCHSV 00A8 MCKMCVBK 0174 MCKMSG 0128 MCKOGPNP 00D8 MCKOPNP 00E0 MCKPASS 007C 02 MCKPXCR1G 0180 MCKPXCR5 017C MCKREC 0078 MCKRECFL 007D MCKSIZE 0188 00000031 MCKSOFT 007C 01 MCKSOMIN 007C 80 MCKTEXT 012E MCKTHLD1 0002 00000009 MCKTHLD2 0004 0000000A MCKTIM1 0002 00000258 MCKTIM2 0004 0000012C MCKTODR1 008C MCKTODR2 0088 MCKTRC 0020 MCKTRCCS 0066 40 MCKTRCF1 0066 MCKTRCIA 006C MCKTRCIC 0060 MCKTRCI0 0060 MCKTRCI2 0062 MCKTRCPM 0066 80 MCKTRCSI 0066 01 MCKTRCTD 0068 MCKTRCUR 0060 MCKTRCZ 0060 00000070 MCKTRC1 0020 MCKTRC2 0030 MCKTRC3 0040 MCKTRC4 0050 MCKWNSKP 0178 MCK824CD 0172 MCK825CD 0173
Copyright IBM Corporation, 1990, 2011