NAME       : HCPASCE
 DESCRIPTION: Address-Space-Control Element
 DSECT      : ASCE
 FUNCTION   : This DSECT maps a z/Arch address-space-control
              element.  The format of an address-space-control
              element is architected, and described in the
              Principles of Operation.
 LOCATED BY : CR1      is the ASCE for the primary address space.
              CR7      is the ASCE for the secondary address space.
              CR13     is the ASCE for the home address space.
              ASTASCE  in an ASTE.
              VMDPASCE is the ASCE for a virtual CPU's current
              primary address space.
              PFXSXASC is the ASCE for the system-execution space.
 CREATED BY : HCPASMCR when an address space is created.
              HCPSSMCR when the system-execution address space is
              created.
              HCPFMUSG when the full track cache address space
              is created.
              HCPHDTMA when an address space is expanded.
              HCPHDTNL when an address space is compressed.
 DELETED BY : HCPASMDS when the address space is destroyed.
 RELOCATION CONSIDERATIONS : None

 ASCE DSECT
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Hex   Dec Type/Val   Lng Label (dup)    Comments
---- ---- --------- ---- -------------- --------
0000    0 Structure      ASCE           Address-Space-Control Element
      ASCE - 8 bytes, 64 bits
0000    0 Dbl-Word     8 ASCEALL (0)    Entire ASCE
      64-bit mask  X'FFFFFFFFFFFFF000'  Isolate STO, RTO or RSTO
          00000AF0       ASCEMSK        PFXGPFRA 64-bit mask in PFXPG
          00FFFFFF       ASCETOMH       X'FFFFFFFF' High word of mask
                                        value
          00000AF4       ASCEMSKL       PFXGPFRA+4,4 Low word of mask in
                                        PFXPG
          00FFF000       ASCETOML       X'FFFFF000' Low word of mask
                                        value
      The next four masks are also used by the STD, RTD and RSD.
      64-bit mask  X'0000000000000200'
      32-bit high  X'00000000'
          00000200       ASCEGSM        X'00000200' Isolate
                                        subspace-group control bit
      64-bit mask  X'0000000000000100'
      32-bit high  X'00000000'
          00000100       ASCEPSM        X'00000100' Isolate private-space
                                        control bit
      64-bit mask  X'0000000000000080'
      32-bit high  X'00000000'
          1... ....      ASCESSM        X'00000080' Isolate
                                        storage-alteration- event control
                                        bit
      64-bit mask  X'0000000000000040'
      32-bit high  X'00000000'
          .1.. ....      ASCEXSM        X'00000040' Isolate
                                        space-switch-event control bit
      64-bit mask  X'0000000000000020'
      32-bit high  X'00000000'
          ..1. ....      ASCERBM        X'00000020' Isolate real-space
                                        control bit - R=0: ASCE is an RTD
                                        or STD - R=1: ASCE is an RSD
      64-bit mask  X'000000000000000C'
      32-bit high  X'00000000'
          .... 11..      ASCEDTMK       X'0000000C' Isolate designation
                                        type bits
          00000002       ASCEDTSHF      2 Bits DT is offset from right
                                        edge of ASCE
      64-bit mask  X'0000000000000003'
      32-bit high  X'00000000'
          .... ..11      ASCETLMK       X'00000003' Isolate table length
                                        bits
          0000000C       ASCETLBYT      12 Bits to shift (TL+1) to get
                                        number of bytes in table
0000    0 Signed       4 ASCEW0 (0)     ASCE Word 0
0000    0 Bitstring    1 ASCEW0B0 (0)   ASCE Word 0 Byte 0
0000    0 Bitstring    1 ASCEBYT0       ASCE Byte 0
0001    1 Bitstring    1 ASCEW0B1 (0)   ASCE Word 0 Byte 1
0001    1 Bitstring    1 ASCEBYT1       ASCE Byte 1
0002    2 Bitstring    1 ASCEW0B2 (0)   ASCE Word 0 Byte 2
0002    2 Bitstring    1 ASCEBYT2       ASCE Byte 2
0003    3 Bitstring    1 ASCEW0B3 (0)   ASCE Word 0 Byte 3
0003    3 Bitstring    1 ASCEBYT3       ASCE Byte 3
0004    4 Signed       4 ASCEW1 (0)     ASCE Word 1
0004    4 Bitstring    1 ASCEW1B0 (0)   ASCE Word 1 Byte 0
0004    4 Bitstring    1 ASCEBYT4       ASCE Byte 4
0005    5 Bitstring    1 ASCEW1B1 (0)   ASCE Word 1 Byte 1
0005    5 Bitstring    1 ASCEBYT5       ASCE Byte 5
0006    6 Bitstring    1 ASCEW1B2 (0)   ASCE Word 1 Byte 2
0006    6 Bitstring    1 ASCEBYT6       ASCE Byte 6
          .... ..1.      ASCEGBIT       X'02' Subspace-group control bit
          .... ...1      ASCEPBIT       X'01' Private-space control bit
0007    7 Bitstring    1 ASCEW1B3 (0)   ASCE Word 1 Byte 3
0007    7 Bitstring    1 ASCEBYT7       ASCE Byte 7
          1... ....      ASCESBIT       X'80' Storage-alteration-event
                                        control bit
          .1.. ....      ASCEXBIT       X'40' Space-switch-event control
                                        bit
          ..1. ....      ASCERBIT       X'20' Real-space control bit -
                                        R=0: ASCE is an RTD or STD - R=1:
                                        ASCE is an RSD
          .... 11..      ASCETBIT       X'0C' Designation type bits The
                                        following four designation type
                                        bits are valid only if the
                                        real-space control bit (ASCERBIT)
                                        = zero (R=0)
          .... 11..      ASCERFTD       X'0C' ASCE is an RFT designation
          .... 1...      ASCERSTD       X'08' ASCE is an RST designation
          .... .1..      ASCERTTD       X'04' ASCE is an RTT designation
          .... ....      ASCESTD        X'00' ASCE is an ST designation
          .... ..11      ASCELBIT       X'03' Table length bits

          
*** ASCE - Address-Space-Control Element
*
*
*** ASCE - Address-Space-Control Element
          
*** Overlay for ASCE in ASCE
*
*     +------+------+------+------+------+------+------+------+
*   0 |:EBYT0|:EBYT1|:EBYT2|:EBYT3|:EBYT4|:EBYT5|:EBYT6|:EBYT7|
*     +------+------+------+------+------+------+------+------+
*   8
*
*** Overlay for ASCE in ASCE

 
Symbol         Dspl Value
-------------- ---- -----
ASCEALL        0000
ASCEBYT0       0000
ASCEBYT1       0001
ASCEBYT2       0002
ASCEBYT3       0003
ASCEBYT4       0004
ASCEBYT5       0005
ASCEBYT6       0006
ASCEBYT7       0007
ASCEDTMK       0000 0C
ASCEDTSHF      0000 00000002
ASCEGBIT       0006 02
ASCEGSM        0000 00000200
ASCELBIT       0007 03
ASCEMSK        0000 00000AF0
ASCEMSKL       0000 00000AF4
ASCEPBIT       0006 01
ASCEPSM        0000 00000100
ASCERBIT       0007 20
ASCERBM        0000 20
ASCERFTD       0007 0C
ASCERSTD       0007 08
ASCERTTD       0007 04
ASCESBIT       0007 80
ASCESSM        0000 80
ASCESTD        0007 00
ASCETBIT       0007 0C
ASCETLBYT      0000 0000000C
ASCETLMK       0000 03
ASCETOMH       0000 00FFFFFF
ASCETOML       0000 00FFF000
ASCEW0         0000
ASCEW0B0       0000
ASCEW0B1       0001
ASCEW0B2       0002
ASCEW0B3       0003
ASCEW1         0004
ASCEW1B0       0004
ASCEW1B1       0005
ASCEW1B2       0006
ASCEW1B3       0007
ASCEXBIT       0007 40
ASCEXSM        0000 40