$TPCBK

Prolog  

Control Block Contents  
   $TPCBK DSECT

Storage Layout  

Cross Reference (Contains links to field and bit definitions)  

$TPCBK Prolog

 NAME       : LGRTPCBK
 DESCRIPTION: Relocation mapping for HCPTPCBK
 DSECT      : $TPCBK
 FUNCTION   : LGRTPCBK describes those fields of the TPCBK that
              will be migrated to the destination system during
              guest relocation.
 LOCATED BY : This is a mapping of the RDODATA area within the
              RDOBK during guest relocation.
 CREATED BY : HCPRLFTF - TPCBK Formatter for LGR
 DELETED BY : HCPRLDRL - Release storage associated with an RDP
 RELOCATION CONSIDERATIONS : This control block is used during live guest
              relocation.  It is used to relocate a control block
              defined in a corresponding HCP COPY file.  Any
              fields or bits defined in HCPTPCBK which are
              required on the destination system must be defined
              here, and code must be added to migrate the field
              or bit during a relocation.

$TPCBK Control Block Content

$TPCBK DSECT

Hex   Dec Type/Val   Lng Label (dup)    Comments
---- ---- --------- ---- -------------- --------
0000    0 Structure      $TPCBK         Relocation mapping for HCPTPCBK
          00000001       $TPC_VER       1 Mapping version number for this
                                        DSECT. Version is independent of
                                        the CP level and need only be
                                        changed when this DSECT is
                                        changed. The convention is to
                                        increment by 1.
0000    0 Signed       2 $TPC_HDRL      Header length (in bytes)
0002    2 Signed       2 $TPC_BITL      Length of mapped bits (in bytes)
0004    4 Signed       4 *              Reserved for future use
          00000008       $TPC_HDLN      *-$TPCBK Length of header (bytes)
      Bit map: Contains the TPCBK flags that are subject to
               relocation. These bits are defined sequentially,
               regardless of how they are defined in HCPTPCBK.
               This yields a consistent mapping that ensures
               compatibility when a guest is relocated between
               systems at differing service levels.
               Names in the comments column indicate the control
               block byte which contains the flag. This name is
               subject to change if the flag definition changes.
         ====> NEVER change bits which already exist here.
         ====> NEVER change the order of bits in this section.
         ====> ALWAYS add new bits at the end of this section,
               together with new flag bytes as required.
0008    8 Signed       2 $TPC_BITS (0)  Bit map area
          00000000       $TPC_BLEN      *-$TPC_BITS Length of bit map
                                        area
      Data:    Contains all HCPTPCBK data that is subject to
               relocation, except for flag bits, which are
               handled separately.
               All fields are defined as XLnn to avoid alignment
               warnings and to pack the data efficiently.
         ====> NEVER change fields which already exist here.
         ====> NEVER change the order of fields in this section.
         ====> ALWAYS add new fields at the end of this section.
               together with new flag bytes as required.
0008    8 Bitstring    1 $TPC_DATA (0)  Start of data map
0008    8 Bitstring   96 $TPCBLOCK      8 12-byte PATHING INFO entries
          00000068       $TPCBYSZ       *-$TPCBK Byte length of $TPCBK
          0000000D       $TPCSIZE       ((*-$TPCBK)+7)/8 DWord length of
                                        $TPCBK

$TPCBK Storage Layout

          
*** $TPCBK - Relocation mapping for HCPTPCBK
*
*     +-------------+-------------+---------------------------+
*   0 | $TPC_HDRL   | $TPC_BITL   |///////////////////////////|
*     +-------------+-------------+---------------------------+
*   8 |                                                       |
*     =                      $TPCBLOCK                        =
*     |                                                       |
*     +-------------------------------------------------------+
*  68
*
*** $TPCBK - Relocation mapping for HCPTPCBK

$TPCBK Cross Reference

Symbol         Dspl Value
-------------- ---- -----
$TPC_BITL      0002
$TPC_BITS      0008
$TPC_BLEN      0008 00000000
$TPC_DATA      0008
$TPC_HDLN      0004 00000008
$TPC_HDRL      0000
$TPC_VER       0000 00000001
$TPCBLOCK      0008
$TPCBYSZ       0008 00000068
$TPCSIZE       0008 0000000D