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Hex Dec Type/Val Lng Label (dup) Comments
---- ---- --------- ---- -------------- --------
0000 0 Structure DSIBK Dump Space Information Area
0000 0 Dbl-Word 8 DSILOCK (3) Dump Space Allocation Lock
The following fields are for additional cluster allocation, when
needed.
0018 24 Signed 4 DSIOLDHI Previous Hi Threshold.
001C 28 Signed 4 DSITAPGS Total DASD pages currently
allocated
0020 32 Signed 4 DSIDmpHi High Threshold value for CP-owned
pages. When the value in this
field is X'FFFFFFFF' no
additional DASD dump space is to
be obtained.
0024 36 Signed 4 DSIRSASV RSADmpCP at time of reallocation
0028 40 Signed 4 DSIDmpLo Low Threshold value for CP-owned
pages. When the value in this
field is X'FFFFFFFF', extra DASD
dump is not released
002C 44 Signed 4 * (0)
002C 44 Bitstring 1 DSIFLAG Test and set flag which indicates
that a call to allocate
additional DASD dump space has
been stacked.
002D 45 Bitstring 3 * RESERVED FOR FUTURE IBM USE
Multi-page write buffer start and end addresses.
0030 48 Address 4 DSIMPWBF Start address of buffer.
0034 52 Address 4 DSIMPWBE End address of buffer. Is
actually address of byte after
end of buffer. DSIMPWBE-DSIMPWBF
= buffer length.
0038 56 Dbl-Word 8 * (0) Force boundary alignment (if
needed)
0038 56 Bitstring 56 DSICALBK CALBK header section
This area contains the CALBK for the dump space allocation
function. It is required when managing clusters of DASD dump
space and is needed as input to HCPPGCAL and HCPPGCRL, the
cluster allocation and release entry points, respectively.
The number of entries in the cluster allocation table is
based on experience. As the size of the average dump
increases in subsequent releases, customers may encounter
message HCP9255I more frequently and the value for
DSIENTCT may need to be increased.
HCPDMP's work area for channel program construction
will be one full page plus whatever remains of the page
at the end of the cluster allocation table.
00000FA0 DSIENTCT 4000 Number of entries in CALBK
0070 112 Dbl-Word 8 DSIENTRY (4000)
Space for Cluster Allocation
Table
00007D00 DSIENTSZ *-DSIENTRY SIZE OF CLUSTER
ALLOCATION TABLE
7D70 2112 Dbl-Word 8 * (0) Force boundary alignment for
CCW's
7D70 2112 Unknown 8 DSICHPGM (594) Space for hard abend dump channel
program construction (used by
HCPDMP)
00001290 DSICHPSZ *-DSICHPGM SIZE OF CHANNEL
PROGRAM AREA
00001200 DSISIZE (*-DSIBK+7)/8 DSIBK ENTRY SIZE IN
DOUBLEWORDS
00009000 DSIBSIZE DSISIZE*8 DSIBK ENTRY SIZE IN
BYTES
OVERLAY FOR ACCESSING THE NEXT ASA FOR Space INFORMATION
0070 112 Signed 4 DSIASA (0) ASA for start of allocation
0070 112 Bitstring 2 DSICC If CKD or ECKD, cylinder part
0072 114 Bitstring 1 DSIP If CKD or ECKD, page part
0073 115 Bitstring 1 DSIV volume part of DSIASA
0074 116 Signed 4 DSINPGS NUMBER OF Pages ALLOCATED
0078 120 Signed 4 DSINEXT (0) Start of the next ASA entry
7D70 2112 Dbl-Word 8 DSICCW CCW construction area
7D78 2120 Dbl-Word 8 DSICCWNX (0) Start of next CCW
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