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.

DFRMP

Prolog  

Control Block Contents  

DFRMP DSECT

Storage Layout  

Cross Reference (Contains links to field and bit definitions)  

DFRMP Prolog

 NAME       : HCPDFRMP
 DESCRIPTION: DDEV Frame Map
 DSECT      : DFRMP
 FUNCTION   : Maps storage frames used to temporarily store
              DDEVs associated with a particular user's
              directory entry
 LOCATED BY : DVMDIDAS
 CREATED BY : HCPUDR
 DELETED BY : HCPLGB
 SERIALIZED : A share of the directory lock is held when copying all of
              the DDEVs associated with a user's directory entry into
              DFRMP storage.
 

DFRMP Control Block Content



DFRMP DSECT

Hex   Dec Type/Val   Lng Label (dup)    Comments
---- ---- --------- ---- -------------- --------
0000    0 Structure      DFRMP          DDEV Frame Map
0000    0 Address      4 DFRNEXT        Pointer to next temporary DDEV
                                        storage frame
0004    4 Signed       4 DFRDDVCT       Count of DDEVs in this frame
0008    8 Signed       4 * (2)          Reserved for IBM use
          00000010       DFRHSIZE       (*-DFRMP) Size of header in bytes
                                        **** THE VALUE OF DDEVSIZE FOR
                                        DATAMAP IS 7
          00000048       DFRDDVSL       (4096-DFRHSIZE)/(DDEVSIZE*8) The
                                        number of DDEV slots to a frame.
0010   16 Bitstring    1 DFRDDEV (0)    Start of actual DDEV storage
 

DFRMP Storage Layout

*** DFRMP - DDEV Frame Map
*
*     +---------------------------+---------------------------+
*   0 |         DFRNEXT           |         DFRDDVCT          |
*     +---------------------------+---------------------------+
*   8 |///////////////////////////////////////////////////////|
*     +-------------------------------------------------------+
*  10 |                                                       |
*     =                       DFRDDEV                         =
*     |                                                       |
*     +-------------------------------------------------------+
*
*** DFRMP - DDEV Frame Map
 

DFRMP Cross Reference

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

DFRDDEV        0010

DFRDDVCT       0004

DFRDDVSL       0008 00000048

DFRHSIZE       0008 00000010

DFRNEXT        0000
This information is based on VM/ESA 2.4.0.
Last updated on 3 Aug 1999 at 11:51:04 EDT.
Copyright IBM Corporation, 1990, 1999