ASCBK - 64-bit CP - V4R4.0
Programming Interface Information:
This information is NOT intended to be
used as Programming Interfaces of z/VM.

ASCBK

Prolog  

Control Block Contents  
   ASCBK DSECT

Storage Layout  

Cross Reference (Contains links to field and bit definitions)  


ASCBK Prolog

 NAME       : HCPASCBK
 DESCRIPTION: Address-Space-Control Block
 DSECT      : ASCBK
 FUNCTION   : Contain information about an address space.
              The ASCBK is essentially CP's software extension
              to the ASN-second-table entry (ASTE) describing
              the address space.
 LOCATED BY : ASTASCBK field of the ASTE defining the address space
 CREATED BY : HCPASMCR
 DELETED BY : HCPASMDS
 SERIALIZED : Many fields in the ASCBK are static for the life of
              the address space.  Most of the rest of them are
              serialized by the ASCBK lock, the lockword for which
              is at ASCLOCK.
              Various fields are serialized by:
              - ASCBK lock (ASCLOCK)
              - MP Defer
              - Console-function mode
              - XSTSTATL
 COMMENTS   : The ASCBK must reside on a doubleword boundary.

 

ASCBK Control Block Content


ASCBK DSECT

Hex   Dec Type/Val   Lng Label (dup)    Comments
---- ---- --------- ---- -------------- --------
0000    0 Structure      ASCBK          Address-Space-Control Block
      Address space management area.
      This area contains fields used to manage and locate the
      address space itself.  All fields in this area are
      serialized by the ASCBK lock (the lockword at ASCLOCK)
      unless specifically noted otherwise.
0000    0 Address      4 ASCOFPNT       Forward pointer to next ASCBK in
                                        chain of ASCBKs anchored from
                                        VMDASCBK of the owner's base
                                        VMDBK. This chain defines what
                                        address spaces are owned by the
                                        VMDBK. SYSTEM-owned spaces are
                                        anchored from the SYSTEM VMDBK.
                                        This field is serialized by the
                                        owner's ASCBK-queue lock
                                        (VMDASCLK). The chain is ended by
                                        a forward pointer of zero.
0004    4 Address      4 ASCSFPNT       Forward pointer to next ASCBK in
                                        the chain of ASCBKs anchored from
                                        RSASHRSP in HCPRSM. This is the
                                        chain of shareable address
                                        spaces, and is serialized by the
                                        lock at RSASHRLK. The chain is
                                        ended by a forward pointer of
                                        zero.
0008    8 Address      4 ASCSBPNT       Backward pointer to previous
                                        ASCBK in the chain of ASCBKs
                                        anchored from RSASHRSP in HCPRSM.
                                        The ASCSBPNT field of the first
                                        ASCBK in the chain is zeros.
000C   12 Signed       4 ASCSEQNO       r-access sequence number,
                                        incremented on address space
                                        reset to match the ASTE sequence
                                        number (ASTSN). r-access i-ASITs
                                        (which use this sequence number)
                                        are sensitive to address space
                                        reset operations.
0010   16 Character   32 ASCSPCID (0)   Space identification:
0010   16 Character    8 ASCUSRID       Owning userid, padded on right
                                        with blanks.
0018   24 Character   24 ASCNAME        Address space name, padded on
                                        right with blanks.
0030   48 Address      4 ASCSNTBK       Pointer to owning SNTBK
                                        (ASCTSNT=1)
0034   52 Bitstring    4 *              Reserved for IBM use
0038   56 Dbl-Word     8 ASCEASIT (0)   ASCBK e-ASIT.
0038   56 Address      4 ASCASTE        Pointer to ASN-Second-Table Entry
                                        (ASTE) for the address space.
                                        Serialized by task ownership at
                                        creation, thereafter unchanged
                                        until space is destroyed.
003C   60 Signed       4 ASCSCRSN       Address space creation sequence
                                        number.
0040   64 Address      4 ASCSPIBK       Pointer to chain of SPIBKs
                                        designating which users are
                                        permitted to attach this space to
                                        their guest-use access list. This
                                        field is serialized by the
                                        space-permission- manager lock
                                        (RSASPMLK in HCPRSMCM).
0044   68 Address      4 ASCOWNER       Pointer to (base) VMDBK of owning
                                        virtual configuration, or SYSTEM
                                        VMDBK if CP owned.
0048   72 Dbl-Word     8 ASCLOCK (3)    Lockword for shared/exclusive
                                        defer lock, protecting fields in
                                        the ASCBK and ASTE. For System
                                        Utility address spaces managed by
                                        HCPVAMAP and HCPVAMDP and
                                        HCPASURO, ASCLOCK exclusive is
                                        sufficient to invalidate a SEGTE
                                        without SEGTRANS. A share of
                                        ASCLOCK must be obtained *before*
                                        trying to obtain SEGTRANS when
                                        validating the SEGTE.
      The presence of discontiguous defined storage via
      DEF STOR CONFIG does not change the definition, though
      there is now no guarantee that all bytes below
      ASCHIBYT are defined or addressable (therefore, all
      references to "size" in the ASCHIBYT definition have
      been changed to "address limit").
0060   96 Dbl-Word     8 ASCHIBYT       The highest addressable byte of
                                        storage in this address space.
                                        The "address limit" of the
                                        address space in bytes is one
                                        greater than this value. Since
                                        X'FFFFFFFF_FFFFFFFF' is a valid
                                        address in ESAME, code must check
                                        for wrap-to-zero when adding one
                                        to ASCHIBYT to calculate the
                                        "address limit" of the address
                                        space in bytes. *NOTE** ASCHIBYT,
                                        in ESAME, is similar to, but not
                                        identical to, ASCSSIZE in
                                        ESA/390.
0068  104 Dbl-Word     8 ASCDEFSZ       Defined storage size in
                                        addressable bytes, minus one. If
                                        DEF STOR CONFIG was used to
                                        define multiple discontiguous
                                        extents of addressable defined
                                        storage, this field contains the
                                        sum of the sizes in bytes of all
                                        of the individual extents (minus
                                        one). Minus one notation used so
                                        that a total size of 16 Ekabytes
                                        may be represented without
                                        ambiguity (as
                                        x'FFFFFFFF_FFFFFFFF').
0070  112 Signed       4 *              Reserved for IBM use
     *                         End of ESAME build only code
0074  116 Bitstring    1 ASCSTATE       Flags indicating current state
                                        Serialized by holding ASCLOCK
                                        exclusive, the owning VMDBK's
                                        PTIL exclusive, AND by Console
                                        Function mode on the owning user.
          1... ....      ASCSHARE       X'80' At least one configuration
                                        other than the owner has
                                        permission to access this address
                                        space.
          .1.. ....      ASCPUBLC       X'40' Any user may attach this
                                        address space to their guest-use
                                        access list for read/only access.
          .... ...1      ASCMDEXT       X'01' DEFINE STORAGE CONFIG has
                                        been used to define multiple
                                        discontiguous addressable extents
                                        for this address space. The
                                        ASCSTCFG area contains the
                                        storage configuration definition.
0075  117 Bitstring    1 ASCTYPE        Code indicating type of address
                                        space These are assigned as bits,
                                        but only one bit will ever be
                                        set. This is done to allow code
                                        to test for combinations with one
                                        instruction.
          1... ....      ASCTUSER       X'80' A user's base address space
          .1.. ....      ASCTDATA       X'40' A data space created by
                                        user request through diagnose
                                        x'23C'
          ..1. ....      ASCTSYSX       X'20' The system-execution
                                        address space
          ...1 ....      ASCTSYSU       X'10' A system utility address
                                        space
          .... .1..      ASCTSNT        X'04' An SNTBK "address space"
0076  118 Bitstring    1 ASCFRMCD       Frame use code for this address
                                        space
0077  119 Bitstring    1 ASCKEY         Bits 0-7 are the key with which
                                        to initialize pages in the
                                        address space.
0078  120 Signed       4 ASCIACCT       Count of i-access pages in the
                                        address space which are locked or
                                        under (possible loss of control)
                                        translation through this ASCBK.
007C  124 Signed       4 ASCRACCT       Count of r-access pages in the
                                        address space which are locked or
                                        under (possible loss of control)
                                        translation through this ASCBK.
0080  128 Address      4 ASCTYPTR       Pointer to address space type
                                        specific control block (PTRMB for
                                        PTRM address spaces). The address
                                        space type specific control block
                                        must itself contain a CP use
                                        Address space Allocation block
                                        (CAABK) at offset zero.
0084  132 Bitstring    1 ASCFOLST       Flags indicating what Frame Owned
                                        list (Owning VMDBK UFO, or
                                        Shared) frames are to be put on.
          1... ....      ASCOUFO        X'80' Frames for this address
                                        space are to be placed on the
                                        owning VMDBK's UFO list.
          .1.. ....      ASCSFO         X'40' Frames for this address
                                        space are to be placed on the
                                        Shared Frame Owned (SFO) list.
      WARNING: There is code in various places that checks the
      address space sub-type flag value without first checking
      address space type flag, so be very careful to avoid
      duplication when defining new sub-types.
0085  133 Bitstring    1 ASCSUTYP       Flags indicating address space
                                        sub-type.
          1... ....      ASCUPTRM       X'80' A PTRM address space
                                        (sub-type of type ASCTSYSU).
          .1.. ....      ASCUPREF       X'40' A preferred (V=R or V=F)
                                        address space (sub-type of type
                                        ASCTUSER).
          ..1. ....      ASCUVDSK       X'20' A VDISK address space
                                        (sub-type of type ASCTSYSU).
          ...1 ....      ASCUFTC        X'10' A full track cache address
                                        space (sub-type of ASCTSYSU)
          .... 1...      ASCUCONN       X'08' The Connectivity (aka ISFC)
                                        address space (sub-type of type
                                        ASCTSYSU).
          .... .1..      ASCUIDNT       X'04' The System-Identity address
                                        space, which identity maps all
                                        storage below 2G with DAT tables
                                        (sub-type of ASCTSYSU).
          .... ..1.      ASCUREAL       X'02' The System-Real address
                                        space, which identity maps all of
                                        real storage (including real
                                        storage above 2G) using an RSD
                                        (ESAME build only) (sub-type of
                                        ASCTSYSU).
0086  134 Bitstring    1 ASCSTSIZ       Segment table size in STL units
          00000001       ASCSTS32       X'01' Segment table size = 128
                                        bytes, addressing up to 32M,
                                        maximum virtual address =
                                        x'01FFFFFF'. For guest primary
                                        address space ASCBKs, ASCSTSIZ =
                                        ASCSTS32 indicates that the
                                        segment table resides in the
                                        VMDLSEG field at the beginning of
                                        the guest base VMDBK. Note:
                                        ASCSTS32 == STDSTL01 Notes :
                                        ASCSTSIZ may have values in
                                        between ASCSTS32 (32M) and
                                        ASCSTS1G (1G). In these cases the
                                        value represents the size of the
                                        segment table when a segment
                                        table is allocated from a free
                                        storage frame. The remainder of
                                        the real storage frame is in use
                                        for GUESTPERM type VMDBK free
                                        storage.
          0000003F       ASCSTS1G       X'3F' Segment table size = 4096
                                        bytes, addressing up to 1024M,
                                        maximum virtual address =
                                        x'3FFFFFFF'. Note: ASCSTS1G ==
                                        STDSTL3F Notes : ASCSTSIZ may
                                        have values in between ASCSTS1G
                                        (1G) and ASCSTS2G (2G). In these
                                        cases the value represents the
                                        size of the segment table when
                                        the remainder of the second frame
                                        of the segment table (past the
                                        end of the contiguous segment
                                        table) was allocated from a free
                                        storage frame. The remainder of
                                        the second real storage frame is
                                        in use for GUESTPERM type VMDBK
                                        free storage.
          0000007F       ASCSTS2G       X'7F' Segment table size = 8192
                                        bytes, addressing up to 2048M,
                                        maximum virtual address =
                                        x'7FFFFFFF'. Note: ASCSTS2G ==
                                        STDSTL7F
0087  135 Bitstring    1 *              Reserved for IBM use
0088  136 Signed       4 ASCMSO         Main Storage Origin for preferred
                                        guest (V=R or V=F) base address
                                        space. Only valid when ASCTYPE =
                                        ASCTUSER and ASCSUTYP = ASCUPREF.
008C  140 Signed       4 ASCCTSPI       Count of users permitted to this
                                        address space. Equal to the
                                        number of SPIBKs on the ASCSPIBK
                                        queue. Serialized by the Space
                                        Permission Manager lock (RSASPMLK
                                        in HCPRSAMP).
      End of Address Space management area
      Address space statistics area.
      Current usage information for this address space
0090  144 Signed       4 ASCCTPRS       Count of resident pages < 2G
0094  148 Signed       4 ASCCTPLK       Count of locked pages
0098  152 Signed       4 ASCCTPGS       Count of paging slots.
009C  156 Signed       4 ASCCTXBK       Count of xstore blocks in this
                                        address space. XSTSTATL must be
                                        held to update this field.
00A0  160 Signed       4 *              Reserved for ASCCTPRG expansion
00A4  164 Signed       4 ASCCTPRG       Count of resident pages >= 2G
      Cumulative historical counts, when address space is private
00A8  168 Signed       4 ASCCPPST       Count of private address space
                                        pages stolen
00AC  172 Signed       4 ASCCPPGR       Count of private address space
                                        pages read from DASD.
00B0  176 Signed       4 ASCCPPGW       Count of private address space
                                        pages written to DASD.
00B4  180 Signed       4 ASCCPXRD       Count of private address space
                                        pages read from XSTORE.
00B8  184 Signed       4 ASCCPXWT       Count of private address space
                                        pages written to XSTORE.
00BC  188 Signed       4 ASCCPMIG       Count of private address space
                                        pages migrated by CP from XSTORE
                                        to DASD.
      Cumulative historical counts, when address space is shared
00C0  192 Signed       4 ASCPTRSH       Cumulative count of page
                                        translations for shared pages.
00C4  196 Signed       4 ASCCSPST       Count of shared address space
                                        pages stolen
00C8  200 Signed       4 ASCCSPGR       Count of shared address space
                                        pages read from DASD.
00CC  204 Signed       4 ASCCSPGW       Count of shared address space
                                        pages written to DASD.
00D0  208 Signed       4 ASCCSXRD       Count of shared address space
                                        pages read from XSTORE.
00D4  212 Signed       4 ASCCSXWT       Count of shared address space
                                        pages written to XSTORE.
00D8  216 Signed       4 ASCCSMIG       Count of shared address space
                                        pages migrated by CP from XSTORE
                                        to DASD.
00DC  220 Signed       4 *              Reserved for IBM use
      End of address space statistics area.
      The following fields are serialized by the available list
      replenishment demand scan lock.  They are used to sort the
      queue of stolen FRMTEs by address space (for user address
      space frames, VDISK address space frames, and NSS/DCSS
      shared segment frames) and by virtual address megabyte
      (for NSS/DCSS shared segment frames only).
00E0  224 Address      4 ASCSTLNX       Address of the next ASCBK for an
                                        address space from which pages
                                        were stolen in this iteration of
                                        the steal task. Each iteration
                                        will initialize this field to
                                        x'FFFFFFFF'. When the entire
                                        queue of FRMTEs is sorted (by
                                        address space), the last ASCBK in
                                        this chain will have x'FFFFFFFF'
                                        in this field.
00E4  228 Address      4 ASC1STFR       Address of the first FRMTE that
                                        was stolen from this address
                                        space in this iteration of the
                                        steal task, and anchor of the
                                        queue of all FRMTEs stolen from
                                        this address space by this
                                        iteration of the steal task
                                        (queued by FRMTE field FRMFPNT).
                                        Each iteration will initialize
                                        this field to x'FFFFFFFF', and a
                                        FRMTE FRMFPNT value of
                                        x'FFFFFFFF' indicates that it is
                                        the last FRMTE on the queue.
00E8  232 Address      4 ASCLSTFR (0)   Address of the last (processed)
                                        FRMTE that was stolen from this
                                        address space in this iteration
                                        of the steal task. Each iteration
                                        will initialize this field to
                                        x'FFFFFFFF', and a FRMTE FRMFPNT
                                        value of x'FFFFFFFF' indicates
                                        that it is the last FRMTE on the
                                        queue. Only used when sorting
                                        FRMTEs for normal user pages,
                                        which do not neet to be sorted by
                                        segment (virtual address
                                        megabyte). For NSS/DCSS shared
                                        segment page FRMTEs, this field
                                        is redefined as ASC1STPG.
00E8  232 Address      4 ASC1STPG       Address of the first PGMBK for
                                        this address space from which
                                        pages were stolen in this
                                        iteration of the steal task, and
                                        anchor of the queue of all PGMBKs
                                        for this address space from which
                                        pages were stolen in this
                                        iteration of the steal task
                                        (queued by PGMBK field PGMNXPGM /
                                        PGMGNPGM). Each iteration will
                                        initialize this field to
                                        x'FFFFFFFF', and x'FFFFFFFF' in a
                                        PGMBK's PGMNXPGM / PGMGNPGM field
                                        indicates that it is the last
                                        PGMBK on the list. Only used when
                                        sorting FRMTEs for NSS/DCSS
                                        shared segment pages, which must
                                        be sorted by segment (virtual
                                        address megabyte). For normal
                                        user page FRMTEs, this field is
                                        redefined as ASCLSTFR.
00EC  236 Address      4 ASCLSTPG       Address of the last PGMBK for
                                        this address space from which
                                        pages were stolen in this
                                        iteration of the steal task. Each
                                        iteration will initialize this
                                        field to x'FFFFFFFF', and
                                        x'FFFFFFFF' in a PGMBK's PGMSTNXT
                                        field indicates that it is the
                                        last PGMBK on the list. Only used
                                        when sorting FRMTEs for NSS/DCSS
                                        shared segment pages, which must
                                        be sorted by segment (virtual
                                        address megabyte).
      The following two fields belong up above with ASCIACCT and
      ASCRACCT, but were placed here to avoid recompiles.  They
      should be moved (and this block comment deleted) when this
      control block is next restructured.
00F0  240 Signed       4 ASCITRCT       Count of in-process i-access
                                        manual translations in the
                                        address space.
00F4  244 Signed       4 ASCRTRCT       Count of in-process r-access
                                        manual translations in the
                                        address space.
      ESAME Region Translation Cache
         ASCR0STD, ASCR0RFT, ASCR0RST, and ASCR0RTT, are in
         ASCE format, that is, the bits which define the table
         level are DT bits (level of the designated table), not
         R*TE format TT bits (which indicate the level of the
         table containing the R*TE).  Any ASCR0R*T fields
         corresponding to table levels higher than that
         designated by the current ASCE are set to zero.
         Serialization of these fields is as follows: For the
         entry designating the current highest level table for
         the address space (that is, the entry which matches the
         current ASCE), PTIL must be held exclusive.  For all
         lower level table entries, either PTIL must be held
         exclusive, or a share of PTIL must be held along with
         RTETRANS in the next higher level R*TE which designates
         the same table.
00F8  248 Dbl-Word     8 ASCR0STD       Rx=0 segment table designation
0100  256 Dbl-Word     8 ASCR0RFT       Rx=0 region first table
                                        designation
0108  264 Dbl-Word     8 ASCR0RST       Rx=0 region second table
                                        designation
0110  272 Dbl-Word     8 ASCR0RTT       Rx=0 region third table
                                        designation
0118  280 Dbl-Word     8 * (3)          Reserved for IBM use
0130  304 Signed       4 ASCMVABV       Number of times a page in this
                                        address space with a frame
                                        address < 2G was moved to a
                                        frame with address >= 2G.
0134  308 Signed       4 ASCMVB2G       Number of times page translation
                                        moved a page in this address
                                        space from a frame with address
                                        >= 2G to one < 2G.
      ESAME HDPBK queues - HDPBKs are the programming areas
      associated with host region and segment tables.  To make
      traversal of sparsely populated tables easier, we keep
      several doubly linked queues of HDPBKs.  The first HDPBK
      queue is the "addressable storage" HDPBK queue, containing
      queue is the "addressable" queue, and contains HDPBKs
      (potentially representing different table levels) for
      each addressable extent of storage, in ascending virtual
      address range order.  The remaining HDPBK queues contain
      all of the HDPBKs for a given table level, again, in
      ascending virtual address range order.
      The region table(s) (if any) and segment table for region
      0 are pre-allocated when the space is created.  Therefore,
      an HDPBK representing region 0 will be the first HDPBK on
      each queue.
      Each queue header can also be mapped using the HDPQPTRA
      HDPBK Queue Pointer Area DSECT define in HCPHDPBK.
      >> Initialization and maintaining of these queues has
      >> been deferred until the initial code base is working,
      >> as these are primarily used as "accelerators" for
      >> routines which traverse HDPBKs
      >> Queue headers will remain 0 until further notice.
0138  312 Signed       8 * (0)
0138  312 Bitstring   40 ASCHDPQS (0)   HDPBK queue header area - space
                                        for 5 queues
0138  312 Signed       8 ASCADHDQ (0)   Addressable storage HDPBK queue
                                        header - doubly linked queue of
                                        HDPBKs
0138  312 Signed       4 ASCADHDN       Forward pointer to first HDPBK on
                                        addressable storage HDPBK queue.
                                        Always points to lowest level
                                        HDPBK for region 0 (RX=0).
013C  316 Signed       4 ASCADHDP       Backward pointer to last HDPBK on
                                        addressable storage HDPBK queue.
0140  320 Signed       8 ASCSGHDQ (0)   Segment table HDPBK queue header
0140  320 Signed       4 ASCSGHDN       Forward pointer to first HDPBK on
                                        segment table HDPBK queue. Always
                                        points to segment table HDPBK for
                                        region 0 (RX=0).
0144  324 Signed       4 ASCSGHDP       Backward pointer to last HDPBK on
                                        segment table HDPBK queue.
0148  328 Signed       8 ASCRTHDQ (0)   Region third table HDPBK queue
                                        header
0148  328 Signed       4 ASCRTHDN       Forward pointer to first HDPBK on
                                        region third table HDPBK queue.
                                        If ASCHIBYT > 2G, points to
                                        region third HDPBK for region 0
                                        (R3X=0).
014C  332 Signed       4 ASCRTHDP       Backward pointer to last HDPBK on
                                        region 3rd table HDPBK queue.
0150  336 Signed       8 ASCRSHDQ (0)   Region second table HDPBK queue
                                        header
0150  336 Signed       4 ASCRSHDN       Forward pointer to first HDPBK on
                                        region 2nd table HDPBK queue. If
                                        high address > 4T, points to
                                        region second HDPBK for region 0
                                        (R2X=0, R3X=0).
0154  340 Signed       4 ASCRSHDP       Backward pointer to last HDPBK on
                                        region 3rd table HDPBK queue.
0158  344 Signed       8 ASCRFHDQ (0)   Region 1st table HDPBK queue hdr
0158  344 Signed       4 ASCRFHDN       Forward pointer to first HDPBK on
                                        region first table HDPBK queue.
                                        If ASCHIBYT > 8P, points to
                                        region first HDPBK for region 0
                                        (R1X=0, R2X=0, R3X=0).
015C  348 Signed       4 ASCRFHDP       Backward pointer to last HDPBK on
                                        region first table HDPBK queue.
      ESAME Address Space Storage Configuration area
      This array contains address extent information for each
      defined address extent.  For most address spaces, there
      will only be one extent defined, from 0 to ASCHIBYT.  If
      the DEFine STORage CONFIGuration command was used to
      define multiple discontiguous address extents, this array
      contains one additional entry for each additional address
      extent defined.  Up to eight extents are allowed, the
      first extent must begin at address zero.
      Individual array elements are mapped by STCONFIG DSECT.
      Array elements must be sorted in ascending virtual address
      order.  Address ranges must not overlap, and must not be
      contiguous.
          00000008       ASCSTELS       8 Number of elements in storage
                                        configuration array
0160  352 Signed       4 ASCSTCAE       Number of additional storage
                                        configuration array elements used
                                        to represent the current storage
                                        config. Is also index of last
                                        used element. Element 0 is always
                                        used. Must be between 0 and
                                        ASCSTELS-1, inclusive.
0164  356 Signed       4 *              Reserved for IBM use
0168  360 Signed       8 * (0)
0168  360 Bitstring  128 ASCSTCFG (0)   ASCSTCFG area contains ASCSTELS
                                        elements, two doublewords each
0168  360 Signed       8 ASCSTCE0 (2)   ASCSTCFG element 0
          00000010       ASCSTLEN       *-ASCSTCE0 Length of one element
          0000000E       ASCWK          (ASCSTELS-1)*2
0178  376 Signed       8 * (14)         Remaining elements
01E8  488 Address      4 ASCSTCMD       Pointer to the GSDBK containing
                                        saved image of the storage
                                        configuration definition string
                                        as issued on the actual DEFine
                                        STORage CONFIGuration command
01EC  492 Signed       4 *              Reserved for IBM use
      End of ASCBK
01F0  496 Signed       4 ASC$END (0)    End of control block
          000001F0       ASCLEN         *-ASCBK Length of ASCBK in bytes
          0000003E       ASCSIZE        (ASCLEN+7)/8 Size of ASCBK in
                                        doublewords
      DSECT to map individual ASCSTCFG storage configuration
      elements

 

ASCBK Storage Layout

          
*** ASCBK - Address-Space-Control Block
*
*     +---------------------------+---------------------------+
*   0 |         ASCOFPNT          |         ASCSFPNT          |
*     +---------------------------+---------------------------+
*   8 |         ASCSBPNT          |         ASCSEQNO          |
*     +---------------------------+---------------------------+
*  10 |                       ASCUSRID                        |
*     +-------------------------------------------------------+
*  18 |                                                       |
*     =                       ASCNAME                         =
*     |                                                       |
*     +---------------------------+---------------------------+
*  30 |         ASCSNTBK          |///////////////////////////|
*     +---------------------------+---------------------------+
*  38 |         ASCASTE           |         ASCSCRSN          |
*     +---------------------------+---------------------------+
*  40 |         ASCSPIBK          |         ASCOWNER          |
*     +---------------------------+---------------------------+
*  48 |                                                       |
*     =                       ASCLOCK                         =
*     |                                                       |
*     +-------------------------------------------------------+
*  60 |                       ASCHIBYT                        |
*     +-------------------------------------------------------+
*  68 |                       ASCDEFSZ                        |
*     +---------------------------+------+------+------+------+
*  70 |///////////////////////////|:STATE|:TYPE |:FRMCD|ASCKEY|
*     +---------------------------+------+------+------+------+
*  78 |         ASCIACCT          |         ASCRACCT          |
*     +---------------------------+------+------+------+------+
*  80 |         ASCTYPTR          |:FOLST|:SUTYP|:STSIZ|//////|
*     +---------------------------+------+------+------+------+
*  88 |          ASCMSO           |         ASCCTSPI          |
*     +---------------------------+---------------------------+
*  90 |         ASCCTPRS          |         ASCCTPLK          |
*     +---------------------------+---------------------------+
*  98 |         ASCCTPGS          |         ASCCTXBK          |
*     +---------------------------+---------------------------+
*  A0 |///////////////////////////|         ASCCTPRG          |
*     +---------------------------+---------------------------+
*  A8 |         ASCCPPST          |         ASCCPPGR          |
*     +---------------------------+---------------------------+
*  B0 |         ASCCPPGW          |         ASCCPXRD          |
*     +---------------------------+---------------------------+
*  B8 |         ASCCPXWT          |         ASCCPMIG          |
*     +---------------------------+---------------------------+
*  C0 |         ASCPTRSH          |         ASCCSPST          |
*     +---------------------------+---------------------------+
*  C8 |         ASCCSPGR          |         ASCCSPGW          |
*     +---------------------------+---------------------------+
*  D0 |         ASCCSXRD          |         ASCCSXWT          |
*     +---------------------------+---------------------------+
*  D8 |         ASCCSMIG          |///////////////////////////|
*     +---------------------------+---------------------------+
*  E0 |         ASCSTLNX          |         ASC1STFR          |
*     +---------------------------+---------------------------+
*  E8 |         ASC1STPG          |         ASCLSTPG          |
*     +---------------------------+---------------------------+
*  F0 |         ASCITRCT          |         ASCRTRCT          |
*     +---------------------------+---------------------------+
*  F8 |                       ASCR0STD                        |
*     +-------------------------------------------------------+
* 100 |                       ASCR0RFT                        |
*     +-------------------------------------------------------+
* 108 |                       ASCR0RST                        |
*     +-------------------------------------------------------+
* 110 |                       ASCR0RTT                        |
*     +-------------------------------------------------------+
* 118 |///////////////////////////////////////////////////////|
*     =///////////////////////////////////////////////////////=
*     |///////////////////////////////////////////////////////|
*     +---------------------------+---------------------------+
* 130 |         ASCMVABV          |         ASCMVB2G          |
*     +---------------------------+---------------------------+
* 138 |         ASCADHDN          |         ASCADHDP          |
*     +---------------------------+---------------------------+
* 140 |         ASCSGHDN          |         ASCSGHDP          |
*     +---------------------------+---------------------------+
* 148 |         ASCRTHDN          |         ASCRTHDP          |
*     +---------------------------+---------------------------+
* 150 |         ASCRSHDN          |         ASCRSHDP          |
*     +---------------------------+---------------------------+
* 158 |         ASCRFHDN          |         ASCRFHDP          |
*     +---------------------------+---------------------------+
* 160 |         ASCSTCAE          |///////////////////////////|
*     +---------------------------+---------------------------+
* 168 |                       ASCSTCE0                        |
*     |                                                       |
*     +-------------------------------------------------------+
* 178 |///////////////////////////////////////////////////////|
*     =///////////////////////////////////////////////////////=
*     |///////////////////////////////////////////////////////|
*     +---------------------------+---------------------------+
* 1E8 |         ASCSTCMD          |///////////////////////////|
*     +---------------------------+---------------------------+
*
*** ASCBK - Address-Space-Control Block

 

ASCBK Cross Reference

Symbol         Dspl Value
-------------- ---- -----
ASC$END        01F0
ASCADHDN       0138
ASCADHDP       013C
ASCADHDQ       0138
ASCASTE        0038
ASCCPMIG       00BC
ASCCPPGR       00AC
ASCCPPGW       00B0
ASCCPPST       00A8
ASCCPXRD       00B4
ASCCPXWT       00B8
ASCCSMIG       00D8
ASCCSPGR       00C8
ASCCSPGW       00CC
ASCCSPST       00C4
ASCCSXRD       00D0
ASCCSXWT       00D4
ASCCTPGS       0098
ASCCTPLK       0094
ASCCTPRG       00A4
ASCCTPRS       0090
ASCCTSPI       008C
ASCCTXBK       009C
ASCDEFSZ       0068
ASCEASIT       0038
ASCFOLST       0084
ASCFRMCD       0076
ASCHDPQS       0138
ASCHIBYT       0060
ASCIACCT       0078
ASCITRCT       00F0
ASCKEY         0077
ASCLEN         01F0 000001F0
ASCLOCK        0048
ASCLSTFR       00E8
ASCLSTPG       00EC
ASCMDEXT       0074 01
ASCMSO         0088
ASCMVABV       0130
ASCMVB2G       0134
ASCNAME        0018
ASCOFPNT       0000
ASCOUFO        0084 80
ASCOWNER       0044
ASCPTRSH       00C0
ASCPUBLC       0074 40
ASCRACCT       007C
ASCRFHDN       0158
ASCRFHDP       015C
ASCRFHDQ       0158
ASCRSHDN       0150
ASCRSHDP       0154
ASCRSHDQ       0150
ASCRTHDN       0148
ASCRTHDP       014C
ASCRTHDQ       0148
ASCRTRCT       00F4
ASCR0RFT       0100
ASCR0RST       0108
ASCR0RTT       0110
ASCR0STD       00F8
ASCSBPNT       0008
ASCSCRSN       003C
ASCSEQNO       000C
ASCSFO         0084 40
ASCSFPNT       0004
ASCSGHDN       0140
ASCSGHDP       0144
ASCSGHDQ       0140
ASCSHARE       0074 80
ASCSIZE        01F0 0000003E
ASCSNTBK       0030
ASCSPCID       0010
ASCSPIBK       0040
ASCSTATE       0074
ASCSTCAE       0160
ASCSTCE0       0168
ASCSTCFG       0168
ASCSTCMD       01E8
ASCSTELS       015C 00000008
ASCSTLEN       0168 00000010
ASCSTLNX       00E0
ASCSTSIZ       0086
ASCSTS1G       0086 0000003F
ASCSTS2G       0086 0000007F
ASCSTS32       0086 00000001
ASCSUTYP       0085
ASCTDATA       0075 40
ASCTSNT        0075 04
ASCTSYSU       0075 10
ASCTSYSX       0075 20
ASCTUSER       0075 80
ASCTYPE        0075
ASCTYPTR       0080
ASCUCONN       0085 08
ASCUFTC        0085 10
ASCUIDNT       0085 04
ASCUPREF       0085 40
ASCUPTRM       0085 80
ASCUREAL       0085 02
ASCUSRID       0010
ASCUVDSK       0085 20
ASCWK          0168 0000000E
ASC1STFR       00E4
ASC1STPG       00E8

This information is based on z/VM V4R4.0. Last updated on 11 Aug 2003 at 13:43:44 EDT.
Copyright IBM Corporation, 1990, 2003