Programming Interface Information: This information is NOT intended to be
used as Programming Interfaces of VM/ESA. It is to be used for diagnosis only.

MIHDR

Prolog  

Control Block Contents  

MIHDR DSECT

Storage Layout  

Cross Reference (Contains links to field and bit definitions)  

MIHDR Prolog

 NAME       : HCPMIHDR
 DESCRIPTION: MISSING INTERRUPT HANDLER HEADER BLOCK
 DSECT      : MIHDR
 FUNCTION   : THE MIHDR CONTAINS THE GENERAL INFORMATION THAT
              PERTAINS TO THE HANDLING OF MISSING INTERRUPT
              CONDITIONS.  IN ADDITION, IT ACTS AS THE ANCHOR
              FOR THE CHAIN OF HCPMIOBJS.
 LOCATED BY :
              IORMIPTR FIELD OF IORBK - BLOCKS USED FOR HANDLING MISSING
              INTERRUPT CONDITIONS
 CREATED BY : MIHDR'S ARE DYNAMICALLY CREATED BY HCPMHLAT.
 DELETED BY : MIHDR'S ARE DELETED BY HCPMHLDT WHEN THERE ARE NO MORE
              MIOBJ'S ASSOCIATED WITH THE MIHDR.

 

MIHDR Control Block Content


MIHDR DSECT

Hex Dec Type/Val Lng Label (dup) Comments ---- ---- --------- ---- -------------- -------- 0000 0 Structure MIHDR MISSING INTERRUPT HANDLER HEADER BLOCK 0000 0 Signed 4 MIRTRYCT RETRY COUNT 0004 4 Address 4 MIOBJPTR ADDRESS OF FIRST MIOBJ IN CHAIN 0008 8 Address 4 MIORGIRA THE ORIGINAL IRA VALUE 000C 12 Address 4 * Reserved for Future IBM use 0010 16 Address 4 MIORGPIO ORIGINAL IORPIOR VALUE 0014 20 Bitstring 1 MICSCH MI on CSCH recovery counter 0015 21 Bitstring 1 MIHFLAG MIH Control Flag 1... .... MIHPEND X'80' Notification task is currently Queued 0016 22 Bitstring 1 * (2) Reserved for future IBM use 00000003 MIHDSIZE (*-MIHDR+7)/8 MIHDR SIZE IN DOUBLE-WORDS

 

MIHDR Storage Layout

*** MIHDR - MISSING INTERRUPT HANDLER HEADER BLOCK
*
*     +---------------------------+---------------------------+
*   0 |         MIRTRYCT          |         MIOBJPTR          |
*     +---------------------------+---------------------------+
*   8 |         MIORGIRA          |///////////////////////////|
*     +---------------------------+------+------+-------------+
*  10 |         MIORGPIO          |MICSCH|:FLAG |/////////////|
*     +---------------------------+------+------+-------------+
*  18
*
*** MIHDR - MISSING INTERRUPT HANDLER HEADER BLOCK

 

MIHDR Cross Reference

(contains links to field and bit definitions)
Symbol         Dspl Value
-------------- ---- -----

MICSCH 0014

MIHDSIZE 0016 00000003

MIHFLAG 0015

MIHPEND 0015 80

MIOBJPTR 0004

MIORGIRA 0008

MIORGPIO 0010

MIRTRYCT 0000


This information is based on VM/ESA 2.4.0.
Last updated on 3 Aug 1999 at 12:14:17 EDT.
Copyright IBM Corporation, 1990, 1999