$VFCBK

Prolog  

Control Block Contents  
   $VFCBK DSECT

Storage Layout  

Cross Reference (Contains links to field and bit definitions)  

$VFCBK Prolog

 NAME       : LGRVFCBK
 DESCRIPTION: Relocation mapping for HCPVFCBK
 DSECT      : $VFCBK
 FUNCTION   : LGRVFCBK describes those fields of the VFCBK 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 : HCPRLFFF - VFCBK 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 HCPVFCBK 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.

$VFCBK Control Block Content

$VFCBK DSECT

Hex   Dec Type/Val   Lng Label (dup)    Comments
---- ---- --------- ---- -------------- --------
0000    0 Structure      $VFCBK         Relocation mapping for HCPVFCBK
          00000001       $VFC_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 $VFC_HDRL      Header length (in bytes)
0002    2 Signed       2 $VFC_BITL      Length of mapped bits (in bytes)
0004    4 Signed       4 *              Reserved for future use
          00000008       $VFC_HDLN      *-$VFCBK Length of header (bytes)
      Bit map: Contains the VFCBK flags that are subject to
               relocation. These bits are defined sequentially,
               regardless of how they are defined in HCPVFCBK.
               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 $VFC_BITS (0)  Bit map area
0008    8 Bitstring    1 $VFC0
          1... ....      $VFCBEOF       X'80' $VFCBEOF VFCBFLAG
          .1.. ....      $VFCBDIAG      X'40' $VFCBDIAG VFCBFLAG
          ..1. ....      $VFCBFCBV      X'20' $VFCBFCBV VFCBFLAG
          ...1 ....      $VFCBREP       X'10' $VFCBREP VFCBFLAG
          00000001       $VFC_BLEN      *-$VFC_BITS Length of bit map
                                        area
      Data:    Contains all HCPVFCBK 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.
0009    9 Bitstring    1 $VFC_DATA (0)  Start of data map
0009    9 Bitstring    4 $VFCBNAME      FCB'S Name
000D   13 Bitstring    1 $VFCBNUM       Channel Number or Space Count
000E   14 Bitstring    2 $VFCBPOSN      Current Line Number
0010   16 Bitstring    1 $VFCBPRED      The last CCW issued
0011   17 Bitstring    2 $VFCBLEN       Length of FCB Data
0013   19 Bitstring    1 $VFCBINDX      FCB Index Byte Value
0014   20 Bitstring  260 $VFCBLOAD      Forms Control Buffer Data
0118  280 Bitstring    2 $VFCBPGCT      Current page count
011A  282 Bitstring    4 $VFCBIBUF      'Sense Intermediate Buffer' Info
          0000011E       $VFC_LEN       *-$VFCBK Total length, in bytes
          00000024       $VFC_SZ        ($VFC_LEN+7)/8 Size in
                                        doublewords

$VFCBK Storage Layout

          
*** $VFCBK - Relocation mapping for HCPVFCBK
*
*     +-------------+-------------+---------------------------+
*   0 | $VFC_HDRL   | $VFC_BITL   |///////////////////////////|
*     +------+------+-------------+------+------+-------------+
*   8 |$VFC0 |        $VFCBNAME          |:CBNUM| $VFCBPOSN   |
*     +------+-------------+------+------+------+-------------+
*  10 |(010) |  $VFCBLEN   |(013) |                           |
*     +------+-------------+------+                           |
*  18 |                                                       |
*     =                      $VFCBLOAD                        =
*     |                                                       |
*     +-------------+---------------------------+-------------+
* 118 | $VFCBPGCT   |        $VFCBIBUF          | 11E
*     +-------------+---------------------------+
*
*** $VFCBK - Relocation mapping for HCPVFCBK

$VFCBK Cross Reference

Symbol         Dspl Value
-------------- ---- -----
$VFC_BITL      0002
$VFC_BITS      0008
$VFC_BLEN      0008 00000001
$VFC_DATA      0009
$VFC_HDLN      0004 00000008
$VFC_HDRL      0000
$VFC_LEN       011A 0000011E
$VFC_SZ        011A 00000024
$VFC_VER       0000 00000001
$VFCBDIAG      0008 40
$VFCBEOF       0008 80
$VFCBFCBV      0008 20
$VFCBIBUF      011A
$VFCBINDX      0013
$VFCBLEN       0011
$VFCBLOAD      0014
$VFCBNAME      0009
$VFCBNUM       000D
$VFCBPGCT      0118
$VFCBPOSN      000E
$VFCBPRED      0010
$VFCBREP       0008 10
$VFC0          0008