NAME       : HCPAPDBK
 DESCRIPTION: Active Page Drain Control Block
 DSECT      : APDBK
 FUNCTION   : Represents the active drain process for page volumes.
              There is only one APDBK that handles all active drains.
 LOCATED BY : RSAAPDBK - in RSMBK
 CREATED BY : HCPDRAIT
 DELETED BY : Never
 REFERENCES :
 SERIALIZED :
 RELOCATION CONSIDERATIONS : None
 COMPATIBILITY AND MIGRATION CONCERNS :

 APDBK DSECT
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Hex   Dec Type/Val   Lng Label (dup)    Comments
---- ---- --------- ---- -------------- --------
0000    0 Structure      APDBK          Active Page Drain Control Block
0000    0 Bitstring   32 APDMSK         Drain Mask. Bits correspond to
                                        one of the 256 possible cpvols.
                                        An on bit means the corresponding
                                        cpvol is being actively drained.
0000    0 Bitstring    8 APDMSKP1       Drain Mask Part 1
0008    8 Bitstring    8 APDMSKP2       Drain Mask Part 2
0010   16 Bitstring    8 APDMSKP3       Drain Mask Part 3
0018   24 Bitstring    8 APDMSKP4       Drain Mask Part 4
0020   32 Bitstring    1 * (12)         Reserved for future. Intended for
                                        greater than 256 cpvol support.
      APD Lockword
0080  128 Dbl-Word     8 APDLK (6)      APD lockword
      Status Section
             Counts are cumulative for all volumes being scanned
             in current active page drain session. Counts represent
             the totals of the pages that have been scanned. Counts
             are reset when next active drain is activated.
00B0  176 Signed       4 APDCVal        Count of valid pages
00B4  180 Signed       4 APDCUFO        Count of IBR pages on UFO
00B8  184 Signed       4 APDCANE        Count of IBR pages on Aging list
                                        that have not been early written
00BC  188 Signed       4 APDCAEW        Count of IBR pages on Aging list
                                        that have been early written
00C0  192 Signed       4 APDCSyn        Count of non-resident pages to be
                                        paged in synchronously
00C4  196 Signed       4 APDCASy        Count of non-resident pages to be
                                        paged in asynchronously
00C8  200 Signed       4 APDCCAS        Count of completed asynchronous
                                        page ins. See HCPAPDLT to control
                                        async page ins.
00CC  204 Signed       4 *              Reserved for IBM use
             These counts are not reset between active drain runs.
00D0  208 Signed       8 APDVisited     Cumulative count of guest pages
                                        visited by active page drain
                                        process.
00D8  216 Signed       8 APDRecoveredSlots
                                        Cumulative count of slots
                                        recovered by the active page
                                        drain process.
00E0  224 Signed       8 APDReadIn      Cumulative count of slots read in
                                        by the active page drain process.
00E8  232 Signed       4 APDASVisited   Cumulative count of address
                                        spaces visited by the active
                                        drain process.
00EC  236 Bitstring    1 APDSTAT        Active Page Drain status
          1... ....      APDON          X'80' APDON Active Page Drain is
                                        on
          .1.. ....      APDCHNG        X'40' APDCHNG APD mask has been
                                        changed since process last came
                                        up for air
00ED  237 Bitstring    1 * (3)          Reserved for IBM use
      Size variables
          0000001E       APDSIZE        (*-APDBK+7)/8 size in double
                                        words
          000000F0       APDBSIZE       APDSIZE*8 size in bytes

          
*** APDBK - Active Page Drain Control Block
*
*     +-------------------------------------------------------+
*   0 |                                                       |
*     =                        APDMSK                         =
*     |                                                       |
*     +-------------------------------------------------------+
*  20
*
*** APDBK - Active Page Drain Control Block
          
*** Overlay for APDMSK in APDBK
*
*     +-------------------------------------------------------+
*   0 |                       APDMSKP1                        |
*     +-------------------------------------------------------+
*   8 |                       APDMSKP2                        |
*     +-------------------------------------------------------+
*  10 |                       APDMSKP3                        |
*     +-------------------------------------------------------+
*  18 |                       APDMSKP4                        |
*     +-------------------------------------------------------+
*  20 |///////////////////////////////////////////////////////|
*     |///////////////////////////+---------------------------+
*     |///////////////////////////|///////////////////////////|
*     +---------------------------+///////////////////////////|
*  30 |///////////////////////////////////////////////////////|
*     =///////////////////////////////////////////////////////=
*     |///////////////////////////////////////////////////////|
*     +-------------------------------------------------------+
*  80 |                                                       |
*     =                        APDLK                          =
*     |                                                       |
*     +---------------------------+---------------------------+
*  B0 |         APDCVAL           |         APDCUFO           |
*     +---------------------------+---------------------------+
*  B8 |         APDCANE           |         APDCAEW           |
*     +---------------------------+---------------------------+
*  C0 |         APDCSYN           |         APDCASY           |
*     +---------------------------+---------------------------+
*  C8 |         APDCCAS           |///////////////////////////|
*     +---------------------------+---------------------------+
*  D0 |                      APDVISITED                       |
*     +-------------------------------------------------------+
*  D8 |                  APDRECOVEREDSLOTS                    |
*     +-------------------------------------------------------+
*  E0 |                      APDREADIN                        |
*     +---------------------------+------+--------------------+
*  E8 |       APDASVISITED        |:STAT |////////////////////|
*     +---------------------------+------+--------------------+
*  F0
*
*** Overlay for APDMSK in APDBK

 
Symbol         Dspl Value
-------------- ---- -----
APDASVisited   00E8
APDBSIZE       00ED 000000F0
APDCAEW        00BC
APDCANE        00B8
APDCASy        00C4
APDCCAS        00C8
APDCHNG        00EC 40
APDCSyn        00C0
APDCUFO        00B4
APDCVal        00B0
APDLK          0080
APDMSK         0000
APDMSKP1       0000
APDMSKP2       0008
APDMSKP3       0010
APDMSKP4       0018
APDON          00EC 80
APDReadIn      00E0
APDRecoveredSlots
               00D8
APDSIZE        00ED 0000001E
APDSTAT        00EC
APDVisited     00D0