PPFBK - 32-bit CP - V4R4.0

Programming Interface Information: This information is NOT intended to be used as Programming Interfaces of z/VM.

#### PPFBK

Prolog

Control Block Contents
PPFBK DSECT

Storage Layout

Cross Reference (Contains links to field and bit definitions)

#### PPFBK Prolog

     NAME       : HCPPPFBK
     DESCRIPTION: PSEUDO PAGE FAULT STACK BLOCK
     DSECT      : PPFBK
     FUNCTION   : A PPFBK REPRESENTS AN INSTANCE OF A PSEUDO
                  PAGE FAULT.  THESE BLOCKS ARE CONNECTED TO
                  ONE OF TWO CHAINS FROM THE VMDBK.
                  THE CHAIN ANCHORED BY VMDPPFPT IS ALL PPFBKS
                  REPRESENTING RESOLVED PSEUDO PAGE FAULTS IN THE
                  primary address space for PAGEX whose
                  INTERRUPT HAS NOT BEEN REFLECTED TO THE GUEST.
                  THE CHAIN ANCHORED BY VMDPPFAR REPRESENTS
                  primary address space page faults for version
                  2 of PFAULT support as well as either version's
                  AR-specified page faults.  They can be in various
                  states of processing as indicated by PPFSTAT.
     LOCATED BY : PPFPNT   - CHAIN OF PPFBKS
                  VMDPPFPT - Field of HCPVMDBK (PAGEX)
                  VMDPPFAR - Field of HCPVMDBK (PFAULT)
     CREATED BY : HCPVIP
     DELETED BY : HCPPPF, HCPVIP
     SERIALIZED : Dispatch lock for contents and chains

#### PPFBK Control Block Content

#### PPFBK DSECT

    Hex   Dec Type/Val   Lng Label (dup)    Comments
    ---- ---- --------- ---- -------------- --------
    0000    0 Structure      PPFBK          PSEUDO PAGE FAULT STACK BLOCK
    0000    0 Signed       4 PPFPNT         POINTER TO NEXT PPFBLOK ON STACK
    0004    4 Signed       4 PPFALET        Effective host ALET associated
                                            with page fault. ALET may be 0.
    0008    8 Dbl-Word     8 * (0)
    0008    8 Address      8 PPFGADDR       64-bit host virtual page fault @
    0008    8 Signed       4 *              High half, host virt pg fault @
    000C   12 Signed       4 PPFADDR        31-bit virtual page fault addr
         THE REMAINING FIELDS OF THE PPFBK ARE USED ONLY FOR page faults which
         use the PFAULT interface
    0010   16 Signed       8 * (0)
    0010   16 Bitstring   16 PPFGPSW        Guest PSW at time of page fault
                                            in 64-bit image of CP
    0010   16 Signed       8 PPFPSW         Guest PSW at time of page fault
                                            in 32-bit image of CP
    0018   24 Signed       8 *              Low half of z/Arch guest PSW
    0020   32 Signed       8 PPFGTOKEN      z/Architecture user defined page
                                            fault token
    0020   32 Signed       4 *              Not used for ESA guest
    0024   36 Signed       4 PPFTOKEN       ESA user defined pg fault token
    0028   40 Signed       8 PPFGBADDR      z/Architecture user base register
                                            contents for AR qualified fault
    0028   40 Signed       4 *
    002C   44 Signed       4 PPFBADDR       ESA user base register contents
                                            for AR qualified page fault
    0030   48 Signed       4 PPFVMDBK       ADDRESS OF PAGE FAULTING VMDBK
    0034   52 Bitstring    1 PPFAREG        ACCESS REGISTER OF PAGE FAULT
    0035   53 Bitstring    1 PPFSTAT        STATE OF AR-SPECIFIED PAGE FAULT
                                            THESE STATES ARE MUTUALLY
                                            EXCLUSIVE
              1... ....      PPFSCHIN       X'80' SCHEDULED FOR INITIATION
                                            INTERUPT
              .1.. ....      PPFCANCL       X'40' INITIATION INTERUPT
                                            CANCELED
              ..1. ....      PPFREFLT       X'20' INITIATION INTERUPT WAS
                                            REFLECTED
              ...1 ....      PPFRESLD       X'10' PAGE FAULT HAS BEEN
                                            RESOLVED
              .... 1...      PPFSCHCO       X'08' SCHEDULED FOR COMPLETION
                                            INTERUPT
    0036   54 Bitstring    1 * (2)          RESERVED
              00000007       PPFBSIZE       (*-PPFBK+7)/8 PPF BLOCK SIZE IN
                                            DOUBLE WORDS

#### PPFBK Storage Layout

    *** PPFBK - PSEUDO PAGE FAULT STACK BLOCK
    *
    *     +---------------------------+---------------------------+
    *   0 |          PPFPNT           |         PPFALET           |
    *     +---------------------------+---------------------------+
    *   8 |                       PPFGADDR                        |
    *     +-------------------------------------------------------+
    *  10
    *
    *** PPFBK - PSEUDO PAGE FAULT STACK BLOCK

    *** Overlay for PPFGADDR in PPFBK
    *
    *     +---------------------------+---------------------------+
    *   8 |///////////////////////////|         PPFADDR           |
    *     +---------------------------+---------------------------+
    *  10 |                       PPFGPSW                         |
    *     |                                                       |
    *     +-------------------------------------------------------+
    *  20
    *
    *** Overlay for PPFGADDR in PPFBK

    *** Overlay for PPFGPSW in PPFBK
    *
    *     +-------------------------------------------------------+
    *  10 |                        PPFPSW                         |
    *     +-------------------------------------------------------+
    *  18 |///////////////////////////////////////////////////////|
    *     +-------------------------------------------------------+
    *  20 |                      PPFGTOKEN                        |
    *     +-------------------------------------------------------+
    *  28
    *
    *** Overlay for PPFGPSW in PPFBK

    *** Overlay for PPFGTOKEN in PPFBK
    *
    *     +---------------------------+---------------------------+
    *  20 |///////////////////////////|         PPFTOKEN          |
    *     +---------------------------+---------------------------+
    *  28 |                      PPFGBADDR                        |
    *     +-------------------------------------------------------+
    *  30
    *
    *** Overlay for PPFGTOKEN in PPFBK

    *** Overlay for PPFGBADDR in PPFBK
    *
    *     +---------------------------+---------------------------+
    *  28 |///////////////////////////|         PPFBADDR          |
    *     +---------------------------+------+------+-------------+
    *  30 |         PPFVMDBK          |:AREG |:STAT |/////////////|
    *     +---------------------------+------+------+-------------+
    *  38
    *
    *** Overlay for PPFGBADDR in PPFBK

#### PPFBK Cross Reference

    Symbol         Dspl Value
    -------------- ---- -----
    PPFADDR        000C
    PPFALET        0004
    PPFAREG        0034
    PPFBADDR       002C
    PPFBSIZE       0036 00000007
    PPFCANCL       0035 40
    PPFGADDR       0008
    PPFGBADDR      0028
    PPFGPSW        0010
    PPFGTOKEN      0020
    PPFPNT         0000
    PPFPSW         0010
    PPFREFLT       0035 20
    PPFRESLD       0035 10
    PPFSCHCO       0035 08
    PPFSCHIN       0035 80
    PPFSTAT        0035
    PPFTOKEN       0024
    PPFVMDBK       0030

This information is based on z/VM V4R4.0. Last updated on 29 Jul 2003 at 16:02:53 EDT.
Copyright IBM Corporation, 1990, 2003