Programming Interface Information:
This information is NOT intended to be used as Programming Interfaces of z/VM. |
CRWBK
Control Block Contents
CRWBK DSECT
Cross Reference (Contains links to field and bit definitions)
CRWBK Prolog
NAME : HCPCRWBK DESCRIPTION: CHANNEL REPORT WORD BLOCK DSECT : CRWBK FUNCTION : THE CRWBK IS A QUEUE ELEMENT ON THE QUEUE OF PENDING CHANNEL REPORT WORDS AWAITING PRESENTATION (VIA A MACHINE CHECK INTERRUPTION) TO THE VIRTUAL MACHINE. LOCATED BY : CHCIORW - ANCHOR OF QUEUE IN CHCBK MCVCRWS - ANCHOR OF QUEUE IN MCVBK CRWNEXT - FORWARD POINTER IN PRECEEDING QUEUE ELEMENT CREATED BY : HCPVDB - WHEN A DEVICE IS DEFINED FOR A VIRTUAL ESA MACHINE HCPVOF - DURING SIMULATION OF A RCHP INSTRUCTION HCPRFC - TO PASS ON A CRW FOR A DEDICATED DEVICE TO CONCERNED VIRTUAL MACHINE DELETED BY : HCPMCV - WHEN A VIRTUAL MACHINE IS RESET - WHEN THE CRW IS STORED IN THE VIRTUAL MACHINE DURING SIMULATION OF A MACHINE CHECK INTERRUPT HCPVOF - DURING SIMULATION OF A STCRW INSTRUCTION
CRWBK Control Block Content
CRWBK DSECT
Hex Dec Type/Val Lng Label (dup) Comments ---- ---- --------- ---- -------------- -------- 0000 0 Structure CRWBK CHANNEL REPORT WORD BLOCK 0000 0 Signed 4 CRWWORD (0) CRW REPORT WORD CONTENTS 0000 0 Bitstring 1 CRWFLAGS CHANNEL REPORT FLAGS AND CODES .1.. .... CRWSOLIC X'40' SOLICITED - FOR EXAMPLE, CHANNEL PATH INITIALIZED IN RESPONSE TO RCHP AS OPPOSED TO CHANNEL PATH INITIALIZED DUE TO LOSS-OF-POWER. ..1. .... CRWOVER X'20' OVERFLOW - ONE OR MORE SUBSEQUENT CHANNEL REPORT WORDS HAVE BEEN LOST. ...1 .... CRWCHAIN X'10' SUBSEQUENT CHANNEL REPORT WORD(S) REQUIRED TO DESCRIBE ONE EVENT. IF A CHAINED CHANNEL REPORT WORD IS LOST FROM OVERFLOW, ALL OF THE CHANNEL REPORT WORDS CHAINED TO THAT CHANNEL REPORT WORD ARE LOST AS WELL. .... 1111 CRWRSC X'0F' REPORTING SOURCE CODE (RSC) MASK .... ..1. CRWMONIT X'02' SOURCE = CHANNEL MONITORING FACILITY .... ..11 CRWSUBCH X'03' SOURCE = SUBCHANNEL. THE SUBCHANNEL NUMBER IS SPECIFIED IN THE REPORTING SOURCE ID. .... .1.. CRWCHPID X'04' SOURCE = CHANNEL PATH. THE CHANNEL PATH IDENTIFIER IS SPECIFIED IN THE REPORTING SOURCE ID. .... 1..1 CRWCAF X'09' SOURCE = CONFIGURATION ALERT TEMPORARY ERROR. THE FAILING CHANNEL PATH IS SPECIFIED IN THE IN THE REPORTING SOURCE ID. .... 1.11 CRWCSS X'0B' SOURCE = CHANNEL SUBSYSTEM. 0001 1 Bitstring 1 CRWEFLD CRW Error Recovery Information 00000000 CRWCHPIP X'00' Channel Path Information Pending 00000080 CRWAR X'80' Ancillary Report Indicator 0000003F CRWERCMK X'3F' Mask for location of ERC Field 00000001 CRWAVAIL X'01' 000001 - ERC = Available 00000002 CRWINIT X'02' 000010 - ERC = Initialized, Parameters not Changed 00000003 CRWTEMP X'03' 000011 - ERC = Temporary Error 00000004 CRWALERT X'04' 000100 - ERC = installed, Parameters Initialized. The device valid BIT AND ANY OTHER FIELD within the subchannel may be changed. 00000005 CRWTERM X'05' 000101 - ERC = Terminal 00000006 CRWPERM X'06' 000110 - ERC = Permanent Error not Initialized 00000007 CRWPERMI X'07' 000111 - ERC = Permanent, Initialized 00000008 CRWIPM X'08' 001000 - ERC = Installed Parameters Modified. The PIM and/or PAM and/or CHPIDS may be changed. 0002 2 Signed 2 CRWRSID RESOURCE IDENTIFIER CODE 0004 4 Signed 4 CRWNEXT NEXT CRW IF ANY 0008 8 Signed 4 CRWRDEV ASSOCIATED RDEVBLOK IF ANY 000C 12 Signed 4 * RESERVED FOR FUTURE IBM USE 00000002 CRWSIZE (*-CRWBK+7)/8 CRWBK SIZE IN DOUBLE WORDS
CRWBK Storage Layout
*** CRWBK - CHANNEL REPORT WORD BLOCK * * +------+------+-------------+---------------------------+ * 0 |:FLAGS|:EFLD | CRWRSID | CRWNEXT | * +------+------+-------------+---------------------------+ * 8 | CRWRDEV |///////////////////////////| * +---------------------------+---------------------------+ * 10 * *** CRWBK - CHANNEL REPORT WORD BLOCK
CRWBK Cross Reference
Symbol Dspl Value -------------- ---- ----- CRWALERT 0001 00000004 CRWAR 0001 00000080 CRWAVAIL 0001 00000001 CRWCAF 0000 09 CRWCHAIN 0000 10 CRWCHPID 0000 04 CRWCHPIP 0001 00000000 CRWCSS 0000 0B CRWEFLD 0001 CRWERCMK 0001 0000003F CRWFLAGS 0000 CRWINIT 0001 00000002 CRWIPM 0001 00000008 CRWMONIT 0000 02 CRWNEXT 0004 CRWOVER 0000 20 CRWPERM 0001 00000006 CRWPERMI 0001 00000007 CRWRDEV 0008 CRWRSC 0000 0F CRWRSID 0002 CRWSIZE 000C 00000002 CRWSOLIC 0000 40 CRWSUBCH 0000 03 CRWTEMP 0001 00000003 CRWTERM 0001 00000005 CRWWORD 0000
Copyright IBM Corporation, 1990, 2001