Programming Interface Information: This information is NOT intended to be
used as Programming Interfaces of z/VM.

SDMCM

Prolog
Control Block Contents
SDMCM DSECT
Storage Layout
Cross Reference

SDMCM Prolog

 NAME       : HCPSDMCM
 DESCRIPTION: Common Data Area for Storage Device Management
 DSECT      : SDMCM
 FUNCTION   : Maintain data for Storage Device Management Component.
 LOCATED BY : Pointer (SYSSDMCM) in the System Common Data Area
 CREATED BY : HCPICUSD - Create and Initialize the SDMCM
 DELETED BY : N/A
 

SDMCM Control Block Content

SDMCM DSECT

Hex   Dec Type/Val   Lng Label (dup)    Comments
---- ---- --------- ---- -------------- --------
0000    0 Structure      SDMCM          Common Data Area for Storage
                                        Device Management
0000    0 Address      4 SDMDRMQF       Pointer to the first DRMBK in the
                                        queue
0004    4 Address      4 SDMDRMQL       Pointer to last DRMBK in the
                                        queue
0008    8 Dbl-Word     8 SDMDRMLK (3)   DRMBK queue lockword
0020   32 Address      4 SDMAMPTB       Timer-id field for HCPAMP
0024   36 Address      4 SDMTZMSM       Pointer to the ConCopy Session
                                        Management Dynamic Data Structure
0028   40 Dbl-Word     8 SDMTZMLK (3)   Lock for the ConCopy Session
                                        Management Dynamic Data Structure
0040   64 Character    4 SDMCMID        Identifies the storage area as a
                                        SDMCM block
          00000009       SDMSIZE        ((*-SDMCM)+7)/8 SDMCM size in
                                        double-words
          00E2C4D4       SDMID          C' SDM' Identifier for a SDMCM
 

SDMCM Storage Layout

          
*** SDMCM - Common Data Area for Storage Device Management
*
*     +---------------------------+---------------------------+
*   0 |         SDMDRMQF          |         SDMDRMQL          |
*     +---------------------------+---------------------------+
*   8 |                                                       |
*     =                       SDMDRMLK                        =
*     |                                                       |
*     +---------------------------+---------------------------+
*  20 |         SDMAMPTB          |         SDMTZMSM          |
*     +---------------------------+---------------------------+
*  28 |                                                       |
*     =                       SDMTZMLK                        =
*     |                                                       |
*     +---------------------------+---------------------------+
*  40 |         SDMCMID           | 44
*     +---------------------------+
*
*** SDMCM - Common Data Area for Storage Device Management
 

SDMCM Cross Reference

Symbol         Dspl Value
-------------- ---- -----
SDMAMPTB       0020
SDMCMID        0040
SDMDRMLK       0008
SDMDRMQF       0000
SDMDRMQL       0004
SDMID          0040 00E2C4D4
SDMSIZE        0040 00000009
SDMTZMLK       0028
SDMTZMSM       0024
This information is based on z/VM V3R1.0.
Last updated on 29 Mar 2001 at 16:35:58 EDT.
Copyright IBM Corporation, 1990, 2001