DFRMP Back to Index page
 
Prolog 
Control Block Contents 
   DFRMP DSECT
Storage Layout 
Cross Reference (Contains links to field and bit definitions)
Programming Interface Information:
This information is NOT intended to be
used as Programming Interfaces of z/VM.


  DFRMP Prolog Top of page
 
 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.
 RELOCATION CONSIDERATIONS : None
 
 
  DFRMP Control Block Content Top of page
 

 DFRMP DSECT Top of page
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 00000027 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 Top of page
 
          
*** DFRMP - DDEV Frame Map
*
*     +---------------------------+---------------------------+
*   0 |         DFRNEXT           |         DFRDDVCT          |
*     +---------------------------+---------------------------+
*   8 |///////////////////////////////////////////////////////|
*     +-------------------------------------------------------+
*
*** DFRMP - DDEV Frame Map
 
 
  DFRMP Cross Reference Top of page
 
 
Symbol         Dspl Value
-------------- ---- -----
DFRDDEV        0010
DFRDDVCT       0004
DFRDDVSL       0008 00000027
DFRHSIZE       0008 00000010
DFRNEXT        0000
 
This information is based on z/VM 7.3.0 Last updated on 22 Jun 2022 at 15:49:05 EDT.
Copyright IBM Corporation, 1990, 2022