$IPRML Back to Index page
Control Block Contents 
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.

  $IPRML Prolog Top of page
 DESCRIPTION: Relocation mapping for IPARML
 DSECT      : $IPRML
 FUNCTION   : LGRIPRML describes those fields of the IPRML 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 IPARML COPY 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.
  $IPRML Control Block Content Top of page

 $IPRML DSECT Top of page
Hex Dec Type/Val Lng Label (dup) Comments ---- ---- --------- ---- -------------- -------- 0000 0 Structure $IPRML Relocation mapping for IPARML 00000001 $PRM_VER 1 Mapping version number 0000 0 Signed 2 $PRM_HDRL Header length (in bytes) 0002 2 Signed 2 $PRM_BITL Length of mapped bits (in bytes) 0004 4 Signed 4 * Reserved for future use 00000008 $PRM_HDLN *-$IPRML Length of header (bytes) Bit map: Contains the IPRML flags that are subject to relocation. These bits are defined sequentially, regardless of how they are defined in IPARML. 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 $PRM_BITS (0) Bit map area 00000000 $PRM_BLEN *-$PRM_BITS Length of bit map area Data: Contains all IPARML 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 $PRM_DATA (0) Start of data map 0008 8 Bitstring 2 $IPPATHID Path ID 000A 10 Bitstring 1 $IPFLAGS1 Flags 000B 11 Bitstring 1 $IPCPSYS CP system service identifier 000C 12 Bitstring 2 $IPMSGLIM Message limit 000E 14 Bitstring 4 $IPNEXT -> RDO offset to next $IPRML 00000012 $PRM_LEN *-$IPRML Total length, in bytes 00000003 $PRM_SZ ($PRM_LEN+7)/8 Size in doublewords
  $IPRML Storage Layout Top of page
*** $IPRML - Relocation mapping for IPARML
*     +-------------+-------------+---------------------------+
*   0 | $PRM_HDRL   | $PRM_BITL   |///////////////////////////|
*     +-------------+------+------+-------------+-------------+
*   8 | $IPPATHID   |(00A) |:CPSYS| $IPMSGLIM   |  $IPNEXT-   |
*     +-------------+------+------+-------------+-------------+
*  10 |   -(00E)    | 12
*     +-------------+
*** $IPRML - Relocation mapping for IPARML
  $IPRML Cross Reference Top of page
Symbol         Dspl Value
-------------- ---- -----
$IPCPSYS       000B
$IPFLAGS1      000A
$IPMSGLIM      000C
$IPNEXT        000E
$IPPATHID      0008
$PRM_BITL      0002
$PRM_BITS      0008
$PRM_BLEN      0008 00000000
$PRM_DATA      0008
$PRM_HDLN      0004 00000008
$PRM_HDRL      0000
$PRM_LEN       000E 00000012
$PRM_SZ        000E 00000003
$PRM_VER       0000 00000001
This information is based on z/VM 6.3.0 Last updated on 22 May 2013 at 13:56:35 EDT.
Copyright IBM Corporation, 1990, 2013