FXPBK Back to Index page
 
Prolog 
Control Block Contents 
   FXPBK 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.


  FXPBK Prolog Top of page
 
 NAME       : HCPFXPBK
 DESCRIPTION: Hyperpav paging channel program storage
 DSECT      : FXPBK
 FUNCTION   : The FXPBK contains contains the command or
              transport mode channel program for hyperpav
              paging.
 LOCATED BY : IORCPA - Points to the HXPBK
 CREATED BY : HCPPAIAT - When the CP owned volume is brought on
              line at IPL time and during the ATTACH
              command processing.
 DELETED BY : HCPPAIDT - When the CP owned volume is DETACHed from
              the system.
 SERIALIZED : The same locking as the IORBK.
 RELOCATION CONSIDERATIONS : None
 NOTES      : FXPBKS ARE ALIGNED 4096 BYTE (FULL PAGE) BLOCKS
              DEBUG fields are provided as debugging aids only and
              are not used for hyperpav paging support.
              We try to maintain the naming convention where
              FXPTxxxx is related to Transport Mode
              FXPCxxxx is related to Command Mode
              anything else could be related to both
  ictures -
              For Transport Mode I/O
              0 +*********************************************--+
              |                                               |
              |  FXPTCW                                       |
              |                                               |
              +*********************************************--+
              |                                               |
              |  FXPTCCB                                      |
              |    contains TCCBK                             |
              |    which includes CDPFX at TCADCWDA           |
              |    CDPFX includes DXDA Define Extent Data     |
              |    CDPFX includes LRDA Locate Record Data     |
              |                                               |
              +*********************************************--+
              |                                               |
              |  TIDAWs                                       |
              |                                               |
              +*********************************************--+
              |                                               |
              |  TCAX                                         |
              |                                               |
              +*********************************************--+
              |                                               |
              |  FXPctls                                      |
              |                                               |
              4K +*********************************************--+
              For Command Mode I/O
              0 +*********************************************--+
              |                                               |
              |  FXPCcws                                      |
              |   |                                           |
              |   | usage grows toward 4K                     |
              |   *                                           |
              |                                               |
              +*********************************************--+
              |                                               |
              |   *                                           |
              |   | usage grows toward 0                      |
              |   |                                           |
              |  IDAWs and Locate Record data                 |
              |                                               |
              +*********************************************--+
              |                                               |
              |  CDPFX area                                   |
              |                                               |
              +*********************************************--+
              |                                               |
              |  FXPctls                                      |
              |                                               |
              4K +*********************************************--+
 
 
  FXPBK Control Block Content Top of page
 

 FXPBK DSECT Top of page
Hex Dec Type/Val Lng Label (dup) Comments ---- ---- --------- ---- -------------- -------- 0000 0 Structure FXPBK Hyperpav paging channel program storage 0000 0 Bitstring 1 * (4096) FXPBK is 4K and 4K aligned 1000 4096 Character 1 FXPEND (0) End of the FXPBK 00001000 FXPBYSZ *-FXPBK Size in bytes 00000200 FXPDWSZ (((*-FXPBK)+7)/8) Size in doublewords 00000400 FXPTCAXb 1024 Byte length of TCAX area as dictated by DS8000 Control fields - If expansion is needed, add a quadword. Quadword is the size of a TIDAW. 00000F90 FXPctls * Label for calculating the length of this control area The next four fields are the frame count for error handling when a format error occurs and the DCW offset in the TSB is is not zero. 0F90 3984 Signed 2 FXPERCT1 Frame count for 1st TCAX DCW 0F92 3986 Signed 2 FXPERCT2 Frame count for 2nd TCAX DCW 0F94 3988 Signed 2 FXPERCT3 Frame count for 3rd TCAX DCW 0F96 3990 Signed 2 FXPERCT4 Frame count for 4th TCAX DCW 0F98 3992 Dbl-Word 8 FXPIO I/O start TOD 0FA0 4000 Signed 4 FXPFRMCT NUMBER OF FRAMES IN CP 0FA4 4004 Signed 4 FXPTIDCT Remaining TIDAWs 0FA8 4008 Address 8 FXPTIDAW Current TIDAW address FXPTIDAW FXPCidaw FXPTIDAW FXPCidaw Latest IDAW address 0FB0 4016 Address 8 FXPLRE HAA current LRE or imb LR 0FB8 4024 Address 8 FXPTCAT HAA last TCAT location 0FC0 4032 Address 8 FXPTILR Current Imbedded LR address 0FXPTILR FXPCCLR FXPTILR FXPCCLR HAA Command Mode latest LR 0FC8 4040 Dbl-Word 8 FXPRECRD Last DASD record number 0FD0 4048 Signed 4 FXPblk# (0) FBA last block number 0FD0 4048 Bitstring 1 FXPH Four bit head 0FD1 4049 Bitstring 1 * Part of FXPblk# 0FD2 4050 Signed 2 * Part of FXPblk# 0FD4 4052 Address 4 FXPTCWLA HLA TCW FXPTCWLA FXPCccw FXPTCWLA FXPCccw HAA Command Mode latest CCW 0FD8 4056 Address 8 FXPFRMTE First FRMTE/SVGBK on queue 0FE0 4064 Address 8 FXPFRMTL Last FRMTE/SVGBK on queue 0FE8 4072 Signed 4 FXPECYL Current 0CCCcccc 0FEC 4076 Bitstring 1 FXPFLAG Flag byte 1... .... FXPADCBC X'80' FXPADCBC Add CBC to TIDAW before adding new last TIDAW .1.. .... FXPADPAD X'40' FXPADPAD Add four byte pad to TCAX TIDAW on next LRE ..1. .... FXPRMPAD X'20' FXPRMPAD Remove four byte pad from TCAX TIDAW on next LRE These are used by HCPPAIIN to restore IORDFLG3 bits. ...1 .... FXPHPPRD X'10' FXPHPPRD Read channel program .... 1... FXPHPPWR X'08' FXPHPPWR Write channel program .... .1.. FXPHPPSV X'04' FXPHPPSV Input block is SVGBK 0FED 4077 Bitstring 1 * Reserved 0FEE 4078 Bitstring 1 FXPTYPE Type of channel program 1... .... FXPFBA X'80' FXPFBA FBA .1.. .... FXPECKDC X'40' FXPECKDC ECKD command mode ..1. .... FXPECKDT X'20' FXPECKDT ECKD transport mode 0FEF 4079 Signed 1 FXPLRcnt LocRec count 0FF0 4080 Address 4 FXPRDEV DEBUG: RDEV address 0FF4 4084 Address 4 FXPHXPBK DEBUG: HXPBK address 0FF8 4088 Address 4 FXPIORBK DEBUG: IORBK address 0FFC 4092 Bitstring 1 FXPLRSTA Locate Record state byte .... .... FXPTCCBE 0 FXPTCCBE TCCB PREFIX LRE in use .... ...1 FXPTCCBI 1 FXPTCCBI TCCB imbedded LR in use .... ..1. FXPTCAXE 2 FXPTCAXE TCAX LRE in use .... ..11 FXPTCAXI 3 FXPTCAXI TCAX imbedded LR used 0FFD 4093 Character 3 FXPEYE Eye catcher 'FXP' 00000070 FXPctlLn *-FXPctls If we've miscalculated, this EQU will show what we need to subtract in the ORG above Define more FXPBK contents 0000 0 Dbl-Word 8 FXPTCW (8) Transport Command Word 0040 64 Dbl-Word 8 FXPTCCB (34) Host TCCB (max length) DWord boundary 00000150 FXPTCCBX * Byte past FXPTCCB CKMAINT that we are on a quadword boundary in order to check that we haven't skipped bytes and not accounted for them properly. Enforce a quadword boundary for TIDAWs 0150 336 Dbl-Word 8 FXPTCAXT (2) Reserved for TCAX TIDAW 0160 352 Character 1 FXPQW (0) Quad word boundary label Last two letters of FXPTID fields: FCXTIDxy x=S for size, x=A for start of TIDAW list (TIDAL) x=M for max frames x=E for offset after last TIDAW y=N for no TCAX y=T for TCAX xy=DE for delta between NO TCAX and TCAX 00000E30 FXPTIDSN FXPBYSZ-(FXPQW-FXPBK)-FXPctlLn TIDAL size - NO TCAX 0160 352 Character 1 FXPTIDAN (3632) TIDAWS - NO TCAX 000000E3 FXPTIDMN (FXPTIDEN-FXPTIDAN)/16 Max frames - NO TCAX 00000A30 FXPTIDST FXPBYSZ-(FXPQW-FXPBK)-FXPTCAXb-FX PctlLn TIDAL size - TCAX 0160 352 Character 1 FXPTIDAT (2608) TIDAWS - TCAX 0B90 2960 Character 1 FXPTIDET (0) After last TIDAW - TCAX 000000A3 FXPTIDMT (FXPTIDET-FXPTIDAT)/16 Max frames - TCAX 00000040 FXPTIDDE (FXPTIDMN-FXPTIDMT) Delta - TCAX and no TCAX TCAX is at the end of the block to allow a dynamic decision about including it in the channel program. If the imbedded locate records in the TCCB are reached with adequate TIDAWs remaining, the TCAX can be used. The remaining frame count in the HCPPAIIN loop is decremented by FXPTIDDE. 0B90 2960 Bitstring 1 FXPTCAX (1024) MAXIMUM TCAX LENGTH DS8000 0F90 3984 Character 1 FXPTIDEN (0) After last TIDAW - NO TCAX This should bring us up to FXPctls at the end of the 4K. Redefine FXPBK for Command Mode 0000 0 Dbl-Word 8 FXPCccws (0) First CCW in chain 00000F50 FXPCdat * After IDAWs and LR data; must be quad-word aligned 0F50 3920 Bitstring 64 FXPCdpfx Basic Prefix data area FXPctls fields actually reside from here to end of the page
 
 
  FXPBK Storage Layout Top of page
 
          
*** FXPBK - Hyperpav paging channel program storage
*
*     +-------------------------------------------------------+
*   0 |///////////////////////////////////////////////////////|
*     =///////////////////////////////////////////////////////=
*     |///////////////////////////////////////////////////////|
*     +-------------------------------------------------------+
*
*** FXPBK - Hyperpav paging channel program storage
          
*** Overlay for FXPEND-x'70' in FXPBK
*
*     +-------------+-------------+-------------+-------------+
* F90 |  FXPERCT1   |  FXPERCT2   |  FXPERCT3   |  FXPERCT4   |
*     +-------------+-------------+-------------+-------------+
* F98 |                        FXPIO                          |
*     +---------------------------+---------------------------+
* FA0 |         FXPFRMCT          |         FXPTIDCT          |
*     +---------------------------+---------------------------+
* FA8 |                       FXPTIDAW                        |
*     +-------------------------------------------------------+
* FB0 |                        FXPLRE                         |
*     +-------------------------------------------------------+
* FB8 |                       FXPTCAT                         |
*     +-------------------------------------------------------+
* FC0 |                       FXPTILR                         |
*     +-------------------------------------------------------+
* FC8 |                       FXPRECRD                        |
*     +------+------+-------------+---------------------------+
* FD0 |FXPH  |//////|/////////////|         FXPTCWLA          |
*     +------+------+-------------+---------------------------+
* FD8 |                       FXPFRMTE                        |
*     +-------------------------------------------------------+
* FE0 |                       FXPFRMTL                        |
*     +---------------------------+------+------+------+------+
* FE8 |         FXPECYL           |:FLAG |//////|:TYPE |:LRCNT|
*     +---------------------------+------+------+------+------+
* FF0 |         FXPRDEV           |         FXPHXPBK          |
*     +---------------------------+------+--------------------+
* FF8 |         FXPIORBK          |:LRSTA|      FXPEYE        |
*     +---------------------------+------+--------------------+
*1000
*
*** Overlay for FXPEND-x'70' in FXPBK
          
*** Overlay for FXPBK in FXPBK
*
*     +-------------------------------------------------------+
*   0 |                                                       |
*     =                        FXPTCW                         =
*     |                                                       |
*     +-------------------------------------------------------+
*  40 |                                                       |
*     =                       FXPTCCB                         =
*     |                                                       |
*     +-------------------------------------------------------+
* 150
*
*** Overlay for FXPBK in FXPBK
          
*** Overlay for FXPBK+0+16*((*-FXPBK+16-0-1)/16) in FXPBK
*
*     +-------------------------------------------------------+
* 150 |                       FXPTCAXT                        |
*     |                                                       |
*     +-------------------------------------------------------+
*
*** Overlay for FXPBK+0+16*((*-FXPBK+16-0-1)/16) in FXPBK
          
*** Overlay for FXPQW in FXPBK
*
*     +-------------------------------------------------------+
* 160 |                                                       |
*     =                       FXPTIDAN                        =
*     |                                                       |
*     +-------------------------------------------------------+
* F90
*
*** Overlay for FXPQW in FXPBK
          
*** Overlay for FXPQW in FXPBK
*
*     +-------------------------------------------------------+
* 160 |                                                       |
*     =                       FXPTIDAT                        =
*     |                                                       |
*     +-------------------------------------------------------+
* B90 |                                                       |
*     =                       FXPTCAX                         =
*     |                                                       |
*     +-------------------------------------------------------+
*
*** Overlay for FXPQW in FXPBK
          
*** Overlay for FXPBK in FXPBK
*
*
*** Overlay for FXPBK in FXPBK
          
*** Overlay for FXPctls-64 in FXPBK
*
*     +-------------------------------------------------------+
* F50 |                                                       |
*     =                       FXPCDPFX                        =
*     |                                                       |
*     +-------------------------------------------------------+
* F90
*
*** Overlay for FXPctls-64 in FXPBK
 
 
  FXPBK Cross Reference Top of page
 
 
Symbol         Dspl Value
-------------- ---- -----
FXPblk#        0FD0
FXPctls        1000 00000F90
FXPctlLn       0FFD 00000070
FXPADCBC       0FEC 80
FXPADPAD       0FEC 40
FXPBYSZ        1000 00001000
FXPCccw        0FD4 FXPTCWLA
FXPCccws       0000
FXPCdat        0000 00000F50
FXPCdpfx       0F50
FXPCidaw       0FA8 FXPTIDAW
FXPCCLR        0FC0 0FXPTILR
FXPDWSZ        1000 00000200
FXPECKDC       0FEE 40
FXPECKDT       0FEE 20
FXPECYL        0FE8
FXPEND         1000
FXPERCT1       0F90
FXPERCT2       0F92
FXPERCT3       0F94
FXPERCT4       0F96
FXPEYE         0FFD
FXPFBA         0FEE 80
FXPFLAG        0FEC
FXPFRMCT       0FA0
FXPFRMTE       0FD8
FXPFRMTL       0FE0
FXPH           0FD0
FXPHPPRD       0FEC 10
FXPHPPSV       0FEC 04
FXPHPPWR       0FEC 08
FXPHXPBK       0FF4
FXPIO          0F98
FXPIORBK       0FF8
FXPLRcnt       0FEF
FXPLRE         0FB0
FXPLRSTA       0FFC
FXPQW          0160
FXPRDEV        0FF0
FXPRECRD       0FC8
FXPRMPAD       0FEC 20
FXPTCAT        0FB8
FXPTCAX        0B90
FXPTCAXb       1000 00000400
FXPTCAXE       0FFC 02
FXPTCAXI       0FFC 03
FXPTCAXT       0150
FXPTCCB        0040
FXPTCCBE       0FFC 00
FXPTCCBI       0FFC 01
FXPTCCBX       0040 00000150
FXPTCW         0000
FXPTCWLA       0FD4
FXPTIDAN       0160
FXPTIDAT       0160
FXPTIDAW       0FA8
FXPTIDCT       0FA4
FXPTIDDE       0B90 00000040
FXPTIDEN       0F90
FXPTIDET       0B90
FXPTIDMN       0160 000000E3
FXPTIDMT       0B90 000000A3
FXPTIDSN       0160 00000E30
FXPTIDST       0160 00000A30
FXPTILR        0FC0
FXPTYPE        0FEE
 
This information is based on z/VM 7.3.0 Last updated on 22 Jun 2022 at 15:50:52 EDT.
Copyright IBM Corporation, 1990, 2022