$PDEBK | Back to Index page

| Prolog Control Block Contents $PDEBK 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.

$PDEBK Prolog | Top of page

     NAME       : LGRPDEBK
     DESCRIPTION: Relocation mapping for HCPPDEBK
     DSECT      : $PDEBK
     FUNCTION   : LGRPDEBK describes those fields of the PDEBK 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.
     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 HCPPDEBK 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.

$PDEBK Control Block Content | Top of page

     $PDEBK DSECT
    Top of page

    Hex   Dec Type/Val   Lng Label (dup)    Comments
    ---- ---- --------- ---- -------------- --------
    0000    0 Structure      $PDEBK         Relocation mapping for HCPPDEBK
              00000001       $PDE_VER       1 Mapping version number
    0000    0 Signed       2 $PDE_HDRL      Header length (in bytes)
    0002    2 Signed       2 $PDE_BITL      Length of mapped bits (in bytes)
    0004    4 Signed       4 *              Reserved for future use
              00000008       $PDE_HDLN      *-$PDEBK Length of header (bytes)
          Bit map: Contains the PDEBK flags that are subject to
                   relocation. These bits are defined sequentially,
                   regardless of how they are defined in HCPPDEBK.
                   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 $PDE_BITS (0)  Bit map area
    0008    8 Bitstring    1 $PDE0
              1... ....      $PDEVALID      X'80' $PDEVALID PDEFLAGS
              .1.. ....      $PDESEND       X'40' $PDESEND PDEFLAGS
              ..1. ....      $PDEPRTY       X'20' $PDEPRTY PDEFLAGS
              ...1 ....      $PDEPRMD       X'10' $PDEPRMD PDEFLAGS
              .... 1...      $PDEPHELD      X'08' $PDEPHELD PDEFLAGS
              .... .1..      $PDECNTRL      X'04' $PDECNTRL PDEFLAGS
              .... ..1.      $PDEPEND1      X'02' $PDEPEND1 PDEFLAGS
              .... ...1      $PDEPEND2      X'01' $PDEPEND2 PDEFLAGS
              00000001       $PDE_BLEN      *-$PDE_BITS Length of bit map
                                            area
          Data:    Contains all HCPPDEBK 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.
    0009    9 Bitstring    1 $PDE_DATA (0)  Start of data map
    0009    9 Bitstring    4 $PDE_NEXT      -> RDO offset to next $PDEBK
    000D   13 Bitstring    2 $PDE_PID       Pathid for this PDEBK
    000F   15 Bitstring    1 $PDE_SSC       Target system service code
    0010   16 Bitstring    2 $PDEMSGCT      #OUTSTANDING MSGS ON PATH
    0012   18 Bitstring    2 $PDELRECL      LENGTH REMAINING IN LOGICAL
                                            RECORD
    0014   20 Bitstring    4 $PDESADDR      STATE RELATED ADDRESS
    0018   24 Bitstring    2 $PDEMSGLM      MESSAGE LIMIT
    001A   26 Bitstring    1 $PDESAVST      PREVIOUS STATE OF PATH
              0000001B       $PDE_LEN       *-$PDEBK Total length, in bytes
              00000004       $PDE_SZ        ($PDE_LEN+7)/8 Size in
                                            doublewords

$PDEBK Storage Layout | Top of page

    *** $PDEBK - Relocation mapping for HCPPDEBK
    *
    *     +-------------+-------------+---------------------------+
    *   0 | $PDE_HDRL   | $PDE_BITL   |///////////////////////////|
    *     +------+------+-------------+------+-------------+------+
    *   8 |$PDE0 |        $PDE_NEXT          |  $PDE_PID   |:E_SSC|
    *     +------+------+-------------+------+-------------+------+
    *  10 | $PDEMSGCT   | $PDELRECL   |        $PDESADDR          |
    *     +-------------+------+------+---------------------------+
    *  18 | $PDEMSGLM   |(01A) | 1B
    *     +-------------+------+
    *
    *** $PDEBK - Relocation mapping for HCPPDEBK

$PDEBK Cross Reference | Top of page

    Symbol         Dspl Value
    -------------- ---- -----
    $PDE_BITL      0002
    $PDE_BITS      0008
    $PDE_BLEN      0008 00000001
    $PDE_DATA      0009
    $PDE_HDLN      0004 00000008
    $PDE_HDRL      0000
    $PDE_LEN       001A 0000001B
    $PDE_NEXT      0009
    $PDE_PID       000D
    $PDE_SSC       000F
    $PDE_SZ        001A 00000004
    $PDE_VER       0000 00000001
    $PDECNTRL      0008 04
    $PDELRECL      0012
    $PDEMSGCT      0010
    $PDEMSGLM      0018
    $PDEPEND1      0008 02
    $PDEPEND2      0008 01
    $PDEPHELD      0008 08
    $PDEPRMD       0008 10
    $PDEPRTY       0008 20
    $PDESADDR      0014
    $PDESAVST      001A
    $PDESEND       0008 40
    $PDEVALID      0008 80
    $PDE0          0008

This information is based on z/VM 7.2.0 Last updated on 24 Jun 2020 at 09:32:09 EDT.
Copyright IBM Corporation, 1990, 2020