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. .* .*
                                        -WAH-> The presence of
                                        discontiguous defined storage via
                                        -WAH-> DEF STOR CONFIG does
                                        not change the definition, though
                                        -WAH-> there is now no
                                        guarantee that all bytes below
                                        -WAH-> ASCHIBYT are defined or
                                        addressable (therefore, all
                                        -WAH-> references to "size" in
                                        the ASCHIBYT definition have
                                        -WAH-> 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, *NOTE**
                                        but not identical to, ASCSSIZE in
                                        *NOTE** 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"
          .... ...1      ASMSHRLK       X'01' RSMSHRLK is held exclusive
                                        by caller
          .... ..1.      ASM64PTR       X'02' R0 input to HCPASMCR
                                        contains a 31-bit pointer to a
                                        doubleword in storage which
                                        contains a 64-bit value giving
                                        the size, in bytes, of the
                                        address space to be created.
          .... .1..      ASM64REG       X'04' R0 input to HCPASMCR
                                        contains a 64-bit value giving
                                        the size, in bytes of the address
                                        space to be created.
          1... ....      ASMISOL8       X'80' Process an "isolate"
                                        request by the owner of the
                                        address space.
          .1.. ....      ASMRESET       X'40' Process a reset on the
                                        owner of the address space.
          ..1. ....      ASMDESTR       X'20' Process a destroy
                                        operation.
          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"
          .... ...1      ASMSHRLK       X'01' RSMSHRLK is held exclusive
                                        by caller
          .... ..1.      ASM64PTR       X'02' R0 input to HCPASMCR
                                        contains a 31-bit pointer to a
                                        doubleword in storage which
                                        contains a 64-bit value giving
                                        the size, in bytes, of the
                                        address space to be created.
          .... .1..      ASM64REG       X'04' R0 input to HCPASMCR
                                        contains a 64-bit value giving
                                        the size, in bytes of the address
                                        space to be created.
          1... ....      ASMISOL8       X'80' Process an "isolate"
                                        request by the owner of the
                                        address space.
          .1.. ....      ASMRESET       X'40' Process a reset on the
                                        owner of the address space.
          ..1. ....      ASMDESTR       X'20' Process a destroy
                                        operation.
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.
          00000000       *
          0000003F       ASCSTS1G       X'3F' Segment table size = 4096
                                        bytes, addressing up to 1024M,
                                        maximum virtual address =
                                        x'3FFFFFFF'. Note: ASCSTS1G ==
                                        STDSTL3F
          0000000*       *              : 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.
          00000000       *
          0000007F       ASCSTS2G       X'7F' Segment table size = 8192
                                        bytes, addressing up to 2048M,
                                        maximum virtual address =
                                        x'7FFFFFFF'. Note: ASCSTS2G ==
                                        STDSTL7F
          00000000       *
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 4 fields are serialized by the available list
     replenishment demand scan test and set lock.
00E0  224 Address      4 ASC1STFR       Address of the first FRMTE that
                                        was stolen from this address
                                        space in this iteration of the
                                        steal task. Each iteration will
                                        initialize this field to FF's and
                                        the FF's in a FRMTE's FRMFPNT
                                        indicates that it is the last
                                        FRMTE on the list.
00E4  228 Address      4 ASCSTLNX       Address of the next ASCBK for a
                                        space stolen from in this
                                        iteration of the steal task. Each
                                        iteration will initialize this
                                        field to FF's. When the FRMTE's
                                        are all sorted (by address
                                        space), the last ASCBK in this
                                        chain will have FF's in this
                                        field.
00E8  232 Address      4 ASC1STPG       Address of the first PGMBK that
                                        was stolen from this address
                                        space in this iteration of the
                                        steal task. Each iteration will
                                        initialize this field to FF's and
                                        the FF's in a PGMBK's PGMSTNXT
                                        indicates that it is the last
                                        PGMBK on the list.
00EC  236 Address      4 ASCLSTPG       Address of the last PGMBK that
                                        was stolen from this address
                                        space in this iteration of the
                                        steal task. Each iteration will
                                        initialize this field to FF's and
                                        the FF's in a PGMBK's PGMSTNXT
                                        indicates that it is the last
                                        PGMBK on the list.
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    0 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    0 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 |         ASC1STFR          |         ASCSTLNX          |
*     +---------------------------+---------------------------+
*  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
-------------- ---- -----
*              0086 00000000
*              0086 0000000*
*              0086 00000000
*              0086 00000000
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
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       00E4
ASCSTSIZ       0086
ASCSTS1G       0086 0000003F
ASCSTS2G       0086 0000007F
ASCSTS32       0086 00000001
ASCSUTYP       0085
ASCTDATA       0075 40
ASCTDATA       0075 40
ASCTSNT        0075 04
ASCTSNT        0075 04
ASCTSYSU       0075 10
ASCTSYSU       0075 10
ASCTSYSX       0075 20
ASCTSYSX       0075 20
ASCTUSER       0075 80
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       00E0
ASC1STPG       00E8
ASMDESTR       0075 20
ASMDESTR       0075 20
ASMISOL8       0075 80
ASMISOL8       0075 80
ASMRESET       0075 40
ASMRESET       0075 40
ASMSHRLK       0075 01
ASMSHRLK       0075 01
ASM64PTR       0075 02
ASM64PTR       0075 02
ASM64REG       0075 04
ASM64REG       0075 04

This information is based on z/VM V4R1.0.
Last updated on 6 Jun 2001 at 11:10:17 EDT.
Copyright IBM Corporation, 1990, 2001