$IORBK | Back to Index page

| Prolog Control Block Contents $IORBK 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.

$IORBK Prolog | Top of page

     NAME       : LGRIORBK
     DESCRIPTION: Relocation mapping for HCPIORBK
     DSECT      : $IORBK
     FUNCTION   : LGRIORBK describes those fields of the IORBK 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 : HCPRLFIF - IORBK 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 HCPIORBK 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.

$IORBK Control Block Content | Top of page

     $IORBK DSECT
    Top of page

    Hex   Dec Type/Val   Lng Label (dup)    Comments
    ---- ---- --------- ---- -------------- --------
    0000    0 Structure      $IORBK         Relocation mapping for HCPIORBK
              00000001       $IOR_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 $IOR_HDRL      Header length (in bytes)
    0002    2 Signed       2 $IOR_BITL      Length of mapped bits (in bytes)
    0004    4 Signed       4 *              Reserved for future use
              00000008       $IOR_HDLN      *-$IORBK Length of header (bytes)
          Bit map: Contains the IORBK flags that are subject to
                   relocation. These bits are defined sequentially,
                   regardless of how they are defined in HCPIORBK.
                   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 $IOR_BITS (0)  Bit map area
    0008    8 Bitstring    1 $IOR0
              1... ....      $IORRESUM      X'80' $IORRESUM IORIFLG
              .1.. ....      $IORCOPY       X'40' $IORCOPY IORCFLG
              ..1. ....      $IORSNS        X'20' $IORSNS IORSTAT
              ...1 ....      $IORCSNAV      X'10' $IORCSNAV IORSTAT
              .... 1...      $IORSIFCC      X'08' $IORSIFCC IORSTAT
              .... .1..      $IORUIFCC      X'04' $IORUIFCC IORGFLGS
              .... ..1.      $IORCONT       X'02' $IORCONT IORIFLG
              .... ...1      $IORPAVAF      X'01' $IORPAVAF IORPAVFG
              00000001       $IOR_BLEN      *-$IOR_BITS Length of bit map
                                            area
          Data:    Contains all HCPIORBK 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 $IOR_DATA (0)  Start of data map
    0009    9 Bitstring    4 $IORFPNT       Pointer to next queued IORBK
    000D   13 Bitstring    4 $IORPIOR       Pending interruption list
    0011   17 Bitstring   32 $IORORB        ORB
    0031   49 Bitstring    4 $IORUCTL       Saved guest control field values
    0035   53 Bitstring   96 $IORIRB        Interruption Response Block
    0095  149 Bitstring    2 $IORSCNT       Sense byte count
    0097  151 Bitstring   32 $IORSDATA      Sense data buffer
    00B7  183 Bitstring    1 $IORPPEQS      PPRC Extended Query Scope
              00000017       $IORSIZE       (*-$IORBK+7)/8 $IORBK DWord size

$IORBK Storage Layout | Top of page

    *** $IORBK - Relocation mapping for HCPIORBK
    *
    *     +-------------+-------------+---------------------------+
    *   0 | $IOR_HDRL   | $IOR_BITL   |///////////////////////////|
    *     +------+------+-------------+------+--------------------+
    *   8 |$IOR0 |         $IORFPNT          |     $IORPIOR-      |
    *     +------+---------------------------+--------------------+
    *  10 |-(00D)|                                                |
    *     +------+                                                |
    *  18 |                                                       |
    *     =                       $IORORB                         =
    *     |      +---------------------------+--------------------+
    *  30 |      |         $IORUCTL          |                    |
    *     +------+---------------------------+                    |
    *  38 |                                                       |
    *     =                       $IORIRB                         =
    *     |                                  +-------------+------+
    *  90 |                                  |  $IORSCNT   |      |
    *     +----------------------------------+-------------+      |
    *  98 |                                                       |
    *     =                      $IORSDATA                        =
    *     |                                                +------+
    *  B0 |                                                |(0B7) |
    *     +------------------------------------------------+------+
    *  B8
    *
    *** $IORBK - Relocation mapping for HCPIORBK

$IORBK Cross Reference | Top of page

    Symbol         Dspl Value
    -------------- ---- -----
    $IOR_BITL      0002
    $IOR_BITS      0008
    $IOR_BLEN      0008 00000001
    $IOR_DATA      0009
    $IOR_HDLN      0004 00000008
    $IOR_HDRL      0000
    $IOR_VER       0000 00000001
    $IORCONT       0008 02
    $IORCOPY       0008 40
    $IORCSNAV      0008 10
    $IORFPNT       0009
    $IORIRB        0035
    $IORORB        0011
    $IORPAVAF      0008 01
    $IORPIOR       000D
    $IORPPEQS      00B7
    $IORRESUM      0008 80
    $IORSCNT       0095
    $IORSDATA      0097
    $IORSIFCC      0008 08
    $IORSIZE       00B7 00000017
    $IORSNS        0008 20
    $IORUCTL       0031
    $IORUIFCC      0008 04
    $IOR0          0008

This information is based on z/VM 7.2.0 Last updated on 24 Jun 2020 at 09:32:06 EDT.
Copyright IBM Corporation, 1990, 2020