|
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.
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' 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' WE WERE RUNNING SIE (PFXHSIE WAS SET). ..1. .... MCKFHOT X'20' 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' ERROR WAS CHECK-STOP, NOT MACHINE CHECK. ..1. .... MCKF2ND X'20' A SECONDARY ERROR OCCURRED WHILE HANDLING A MACHINE CHECK. ...1 .... MCKF2CS X'10' SECONDARY ERROR WAS A CHECK-STOP. .... 1... MCKFMCIC X'08' INVALID MCIC (REQUIRED BITS MISSING). .... .1.. MCKFABND X'04' 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' EMERGENCY HOST TERMINATION REQUIRED (AND OTHER FLAGS MAY BE MEANINGLESS). .1.. .... MCKFNOTM X'40' HOST TERMINATION NOT REQUIRED BY THE MACHINE-CHECK FLIH. ..1. .... MCKFDIE1 X'20' HOST TERMINATION WAS REQUIRED BY THE MACHINE-CHECK FLIH. ...1 .... MCKFDIE2 X'10' HOST TERMINATION WAS REQUIRED BY THE MACHINE-CHECK SLIH. .... 1... MCKFIPL X'08' SOFT-RE-IPL AFTER TERMINATE DISALLOWED. .... .1.. MCKFIPLI X'04' SOFT-RE-IPL DISALLOWED BY IO SUB-SYSTEM. .... ..1. MCKFNOVR X'02' V=R SURVIVAL AFTER RE-IPL DISALLOWED BY SOMETHING OTHER THAN THE I/O SUB-SYSTEM. .... ...1 MCKFIOVR X'01' V=R SURVIVAL AFTER RE-IPL DISALLOWED BY THE I/O SUB-SYSTEM. 000C 12 Bitstring 1 * RESERVED FOR FUTURE IBM USE. 000D 13 Bitstring 1 MCKFOOT5 FOOTPRINTS: MISCELLANEOUS. 1... .... MCKFVFIX X'80' VIRTUAL SIDE WAS TOLD DAMAGE WAS FIXED. .1.. .... MCKFZTOD X'40' 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' RE-ESTABLISHED HOST CONTROL REGISTERS. ..1. .... MCKFXCKC X'20' RE-ESTABLISHED CLOCK COMP'TOR (APPROX). ...1 .... MCKFXPT X'10' RE-ESTABLISHED CPU TIMER (APPROX). .... 1... MCKFXTPR X'08' Re-established TOD Programmable Register 000F 15 Bitstring 1 MCKFOOT7 FOOTPRINTS: CORRECTIVE ACTIONS TAKEN. 1... .... MCKFATSK X'80' ATTEMPTED TO RUN INTERRUPTED SYSTEM TASK TO COMPLETION. .1.. .... MCKFXTSK X'40' ATTEMPT TO COMPLETE INTERRUPTED SYSTEM TASK WAS SUCCESSFUL. ..1. .... MCKFRMOF X'20' MARKED FRAME TO BE TAKEN OFFLINE. ...1 .... MCKFXKEY X'10' RESTORED HOST STORAGE KEY. .... 1... MCKFXPAG X'08' 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 MCKVFSCT Count of Vector Facility Source machine checks 0000000C MCKVFSMX 12 Maximum number of VFS machine checks allowed before taking the VF offline 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' SOME HOST VALIDITY BITS ARE INVALID .1.. .... MCKFORCE X'40' This failure must be forced to hard ...1 .... MCKHARD X'10' HARD FAILURE WAS ENCOUNTERED .... 1... MCKDEGRP X'08' DEGRADE FAILURE TO PASS TO GUEST .... .1.. MCKDEGRN X'04' DEGRADE FAILURE NOT TO PASS TO GUEST .... ..1. MCKPASS X'02' FAILURE TO BE PASSED TO GUEST .... ...1 MCKSOFT X'01' SOFT FAILURE WAS ENCOUNTERED 007D 125 Bitstring 1 MCKRECFL Machine Check Recording Checks Flags 1... .... MCKCPREC X'80' CP will record this error check record .1.. .... MCKLFREC X'40' The machine check handler is looking for a virtual machine to record the machine check record . 007E 126 Bitstring 1 * (2) Reserved for future IBM use. 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' PRIMARY MACHINE CHECK BITS - BYTE 0 1... .... MCICSD X'80' SYSTEM DAMAGE BIT. .1.. .... MCICPD X'40' PROCESSING DAMAGE BIT. ..1. .... MCICSR X'20' SYSTEM RECOVERY BIT. ...1 .... MCICITD X'10' INTERVAL TIMER DAMAGE. (370 GUESTS) .... 1... MCICCD X'08' TIMING (CLOCK) FACILITY DAMAGE. .... .1.. MCICED X'04' EXTERNAL DAMAGE. .... ..1. MCICVFF X'02' VECTOR FACILITY FAILURE .... ...1 MCICDG X'01' DEGRADATION BIT. 0091 145 Bitstring 1 MCKHIC1 HOST WORKING COPY, MCIC BYTE 1. 1111 .... MCIPRIM1 X'F0' PRIMARY MACHINE CHECK BITS - BYTE 1 1... .... MCICW X'80' WARNING BIT. .1.. .... MCICCRW X'40' PENDING-CRW REPORT. ..1. .... MCICSP X'20' SERVICE PROCESSOR DAMAGE. ...1 .... MCICCSD X'10' CHANNEL-SUBSYSTEM DAMAGE. .... .1.. MCICVFS X'04' VECTOR FACILITY SOURCE .... ..1. MCICBU X'02' 'BACKED UP' BIT. .... ...1 MCICDL X'01' 'DELAYED' BIT. (370 GUESTS) 0092 146 Bitstring 1 MCKHIC2 HOST WORKING COPY, MCIC BYTE 2. 1... .... MCICSE X'80' STORAGE ERROR UNCORRECTED. .1.. .... MCICSC X'40' STORAGE ERROR CORRECTED. ..1. .... MCICKE X'20' STORAGE-KEY ERROR UNCORRECTED. ...1 .... MCICSDG X'10' STORAGE DEGRADATION. MODIFIES STORAGE ERROR CORRECTED. .... 1... MCICVWP X'08' BITS 12-15 OF MC OLD PSW VALID. .... .1.. MCICVMS X'04' SYSTEM MASK & KEY OF MC OLD PSW VALID. .... ..1. MCICVPM X'02' PROGRAM MASK & CC OF MC OLD PSW VALID. .... ...1 MCICVIA X'01' INSTR ADDR OF MC OLD PSW IS VALID. 0093 147 Bitstring 1 MCKHIC3 HOST WORKING COPY, MCIC BYTE 3. 1... .... MCICVFA X'80' FAILING STORAGE ADDRESS IS VALID. ..1. .... MCICVED X'20' EXTERNAL-DAMAGE CODE IS VALID. ...1 .... MCICVFP X'10' FP REGISTERS STORED ARE VALID. .... 1... MCICVGR X'08' GP REGISTERS STORED ARE VALID. .... .1.. MCICVCR X'04' CONTROL REGISTERS STORED VALID. .... ..1. MCICVLG X'02' EXTENDED LOGOUT AREA IS VALID. .... ...1 MCICVST X'01' 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 .... MCICVXFP X'10' Additional FP Registers Validity (ESA390) FP Control Register Validity (ESAME) .... 1... MCICAR X'08' Ancillary Report Bit .... ..1. MCICVCT X'02' CPU TIMER STORED IS VALID. .... ...1 MCICVCC X'01' 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' PRIMARY MACHINE CHECK BITS - BYTE 0 1... .... MCICSD X'80' SYSTEM DAMAGE BIT. .1.. .... MCICPD X'40' PROCESSING DAMAGE BIT. ..1. .... MCICSR X'20' SYSTEM RECOVERY BIT. ...1 .... MCICITD X'10' INTERVAL TIMER DAMAGE. (370 GUESTS) .... 1... MCICCD X'08' TIMING (CLOCK) FACILITY DAMAGE. .... .1.. MCICED X'04' EXTERNAL DAMAGE. .... ..1. MCICVFF X'02' VECTOR FACILITY FAILURE .... ...1 MCICDG X'01' DEGRADATION BIT. 0099 153 Bitstring 1 MCKGIC1 GUEST WORKING COPY, MCIC BYTE 1. 1111 .... MCIPRIM1 X'F0' PRIMARY MACHINE CHECK BITS - BYTE 1 1... .... MCICW X'80' WARNING BIT. .1.. .... MCICCRW X'40' PENDING-CRW REPORT. ..1. .... MCICSP X'20' SERVICE PROCESSOR DAMAGE. ...1 .... MCICCSD X'10' CHANNEL-SUBSYSTEM DAMAGE. .... .1.. MCICVFS X'04' VECTOR FACILITY SOURCE .... ..1. MCICBU X'02' 'BACKED UP' BIT. .... ...1 MCICDL X'01' 'DELAYED' BIT. (370 GUESTS) 009A 154 Bitstring 1 MCKGIC2 GUEST WORKING COPY, MCIC BYTE 2. 1... .... MCICSE X'80' STORAGE ERROR UNCORRECTED. .1.. .... MCICSC X'40' STORAGE ERROR CORRECTED. ..1. .... MCICKE X'20' STORAGE-KEY ERROR UNCORRECTED. ...1 .... MCICSDG X'10' STORAGE DEGRADATION. MODIFIES STORAGE ERROR CORRECTED. .... 1... MCICVWP X'08' BITS 12-15 OF MC OLD PSW VALID. .... .1.. MCICVMS X'04' SYSTEM MASK & KEY OF MC OLD PSW VALID. .... ..1. MCICVPM X'02' PROGRAM MASK & CC OF MC OLD PSW VALID. .... ...1 MCICVIA X'01' INSTR ADDR OF MC OLD PSW IS VALID. 009B 155 Bitstring 1 MCKGIC3 GUEST WORKING COPY, MCIC BYTE 3. 1... .... MCICVFA X'80' FAILING STORAGE ADDRESS IS VALID. ..1. .... MCICVED X'20' EXTERNAL-DAMAGE CODE IS VALID. ...1 .... MCICVFP X'10' FP REGISTERS STORED ARE VALID. .... 1... MCICVGR X'08' GP REGISTERS STORED ARE VALID. .... .1.. MCICVCR X'04' CONTROL REGISTERS STORED VALID. .... ..1. MCICVLG X'02' EXTENDED LOGOUT AREA IS VALID. .... ...1 MCICVST X'01' 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 .... MCICVXFP X'10' Additional FP Registers Validity (ESA390) FP Control Register Validity (ESAME) .... 1... MCICAR X'08' Ancillary Report Bit .... ..1. MCICVCT X'02' CPU TIMER STORED IS VALID. .... ...1 MCICVCC X'01' 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' No bits defined 00A1 161 Bitstring 1 MCKHXDC1 Byte 1 of the external damage code 1... .... MCEXTDXN X'80' Bit 8 - Extended storage not operational .1.. .... MCEXTDXF X'40' Bit 9 - Extended storage control failure 00A2 162 Bitstring 1 MCKHXDC2 Byte 2 of the external damage code 1... .... MCEXTDPS X'80' Bit 16 - Primary-Sync Damage .1.. .... MCEXTDEA X'40' Bit 17 - ETR Attachement Damage ..1. .... MCEXTDSL X'20' Bit 18 - Switch to local ...1 .... MCEXTDES X'10' Bit 19 - ETR Sync check 00A3 163 Bitstring 1 MCKHXDC3 Byte 3 of the external damage code .... .... MCEXTD3 X'00' No bits defined 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' No bits defined 00A5 165 Bitstring 1 MCKGXDC1 Byte 1 of the external damage code 1... .... MCEXTDXN X'80' Bit 8 - Extended storage not operational .1.. .... MCEXTDXF X'40' Bit 9 - Extended storage control failure 00A6 166 Bitstring 1 MCKGXDC2 Byte 2 of the external damage code 1... .... MCEXTDPS X'80' Bit 16 - Primary-Sync Damage .1.. .... MCEXTDEA X'40' Bit 17 - ETR Attachement Damage ..1. .... MCEXTDSL X'20' Bit 18 - Switch to local ...1 .... MCEXTDES X'10' Bit 19 - ETR Sync check 00A7 167 Bitstring 1 MCKGXDC3 Byte 3 of the external damage code .... .... MCEXTD3 X'00' No bits defined 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 Signed 4 MCKMSG (0) MACHINE CHECK MESSAGE BUFFER. 00E8 232 Character 6 MCKHDR FIXED MESSAGE HEADER. 00EE 238 Character 68 MCKTEXT Variable message text. 0132 306 Bitstring 1 MCK824CD IDENTIFIES TEXT FOR MSG MCH824E. 0133 307 Bitstring 1 MCK825CD IDENTIFIES TEXT FOR MSG MCH825E. 0134 308 Signed 4 MCKMCVBK Address of (copy of) MCVBK 0138 312 Signed 4 MCKWNSKP Address of VMDBK already presented with the machine check. 013C 316 Bitstring 1 MCKEND (0) END OF MCKAREA. 0000013C MCKLEN *-MCKBK LENGTH (BYTES) OF MCKBK. 00000028 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' PRIMARY (NOT 2NDARY) MCH-CHK OR CHK-STP. .1.. .... MCKTRCCS X'40' ERROR WAS CHECK-STOP, NOT MACHINE CHK. .... ...1 MCKTRCSI X'01' 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. Redefine MCKMCHSV area usage. This redefinition is used during the restoration of the Vector Facility. 00A8 168 Dbl-Word 8 MCKVACR (2) Vector-activity count(VAC) 00B8 184 Dbl-Word 8 MCKVMRR (2) Vector-mask register (VMR) 00C8 200 Dbl-Word 8 MCKVSRR (0) Vector-save register (VSR) 00C8 200 Bitstring 1 * (6) 00CE 206 Bitstring 1 MCKVSRIU VSR in use bits 00CF 207 Bitstring 1 * Save orginal Program new PSW for VOP interception 00E0 224 Dbl-Word 8 MCKOPNP Saved original Program new PSW 00D8 216 Bitstring 8 MCKOGPNP ESAME 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 | MCKVFSCT |/////////////| MCKCPUAD |
* +---------------------------+------+------+-------------+
* 78 | MCKREC |:FAILF|:RECFL|/////////////|
* +---------------------------+------+------+-------------+
* 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 | MCKHDR | |
* +-----------------------------------------+ |
* F0 | |
* = MCKTEXT =
* | +------+------+---------------------------+
* 130 | |:824CD|:825CD| MCKMCVBK |
* +-------------+------+------+---------------------------+
* 138 | MCKWNSKP |
* +---------------------------+
*
*** MCKBK - MACHINE CHECK DESCRIPTOR BLOCK
*** Overlay for MCKTRCUR in MCKBK
*
* +-------------+---------------------------+------+------+
* 60 | MCKTRCI0 | MCKTRCI2 |:TRCF1|//////|
* +-------------+-------------+-------------+------+------+
* 68 | MCKTRCTD | MCKTRCIA |
* +---------------------------+---------------------------+
* 70
*
*** Overlay for MCKTRCUR in MCKBK
*** Overlay for MCKMCHSV in MCKBK
*
* +-------------------------------------------------------+
* A8 | MCKVACR |
* | |
* +-------------------------------------------------------+
* B8 | MCKVMRR |
* | |
* +-----------------------------------------+------+------+
* C8 |/////////////////////////////////////////|:VSRIU|//////|
* +-----------------------------------------+------+------+
* D0
*
*** Overlay for MCKMCHSV in MCKBK
*** Overlay for MCKMCHRE in MCKBK
*
* +-------------------------------------------------------+
* E0 | MCKOPNP |
* +-------------------------------------------------------+
* E8
*
*** Overlay for MCKMCHRE in MCKBK
*** Overlay for MCKMCHRC in MCKBK
*
* +-------------------------------------------------------+
* D8 | MCKOGPNP |
* +-------------------------------------------------------+
* E0 |///////////////////////////////////////////////////////|
* +-------------------------------------------------------+
* E8
*
*** Overlay for MCKMCHRC in MCKBK
MCKBK Cross Reference
Symbol Dspl Value -------------- ---- ----- MCEXTDEA 00A2 40 MCEXTDEA 00A6 40 MCEXTDES 00A2 10 MCEXTDES 00A6 10 MCEXTDPS 00A2 80 MCEXTDPS 00A6 80 MCEXTDSL 00A2 20 MCEXTDSL 00A6 20 MCEXTDXF 00A1 40 MCEXTDXF 00A5 40 MCEXTDXN 00A1 80 MCEXTDXN 00A5 80 MCEXTD0 00A0 00 MCEXTD0 00A4 00 MCEXTD3 00A3 00 MCEXTD3 00A7 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 MCICVFF 0090 02 MCICVFF 0098 02 MCICVFP 0093 10 MCICVFP 009B 10 MCICVFS 0091 04 MCICVFS 0099 04 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 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 013C 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 MCKFIOVR 000B 01 MCKFIPL 000B 08 MCKFIPLI 000B 04 MCKFIXUP 0008 80 MCKFLAGS 0008 MCKFMCIC 000A 08 MCKFMISC 0008 MCKFNOTM 000B 40 MCKFNOVR 000B 02 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 MCKGXDC 00A4 MCKGXDC0 00A4 MCKGXDC1 00A5 MCKGXDC2 00A6 MCKGXDC3 00A7 MCKHARD 007C 10 MCKHDR 00E8 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 MCKLEN 013C 0000013C MCKLFREC 007D 40 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 MCKMCHSV 00A8 MCKMCVBK 0134 MCKMSG 00E8 MCKOGPNP 00D8 MCKOPNP 00E0 MCKPASS 007C 02 MCKREC 0078 MCKRECFL 007D MCKSIZE 013C 00000028 MCKSOFT 007C 01 MCKSOMIN 007C 80 MCKTEXT 00EE 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 MCKVACR 00A8 MCKVFSCT 0070 MCKVFSMX 0070 0000000C MCKVMRR 00B8 MCKVSRIU 00CE MCKVSRR 00C8 MCKWNSKP 0138 MCK824CD 0132 MCK825CD 0133
Last updated on 5 Jun 2001 at 14:18:25 EDT.
Copyright IBM Corporation, 1990, 2001