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Programming Interface Information:
This information is NOT
intended to be
used as Programming Interfaces of VM/ESA. It is to be used for diagnosis only. |
SUBBK
Cross Reference (Contains links to field and bit definitions)
SUBBK Prolog
Name : DMSSUBBK Description: Subpool descriptor block DSECT : SUBBK Function : Mapping macro which maps information about storage management subpools. CMS defines a SUBBK for each subpool it creates.
SUBBK Control Block Content
SUBBK DSECT
Hex Dec Type/Val Lng Label (dup) Comments ---- ---- --------- ---- -------------- -------- 0000 0 Structure SUBBK Subpool descriptor block 0000 0 Signed 4 SUBFORWD Forward pointer for Private SUBBKs 0004 4 Signed 4 SUBBACKW Backward pointer for Private SUBBKs 0008 8 Signed 4 SUBSHFOR Forward pointer for Shared SUBBKs 000C 12 Signed 4 SUBSHBAC Backward pointer for Shared SUBBKs 0010 16 Signed 4 SUBPARTP Anchor for chain of paritally allocated pages 0014 20 Signed 4 SUBFULLP Anchor for chain of fully allocated pages 0018 24 Character 8 SUBPNAME Name of the subpool 0020 32 Bitstring 1 SUBPFLAG Flags to define the described page 1... .... SUBLASTP X'80' Last partial page added is still active .1.. .... SUBPSYST X'40' System subpool, survives ABEND .... .1.. SUBPNEW X'04' Most recent created subpool on this SVC level .... ..11 SUBPGLOB X'03' The subpool is GLOBAL .... ..1. SUBPSHAR X'02' The subpool is SHARED .... ...1 SUBPPRIV X'01' The subpool is PRIVATE IF YOU ARE MOVING THESE BITS PLEASE NOTE NOTES : The following bits have a corresponding bit in the SPPL byte of the SPPL. The bits are in the same locations: SPPLFG1 SUBPFLAG Bit Position (in both) ------- -------- ---------------------- SPPLSYS SUBPSYST X'40' SPPLGLO SUBPGLOB X'03' SPPLSHA SUBPSHAR X'02' SPPLPRI SUBPPRIV X'01' 0021 33 Bitstring 1 SUBPKEY Storage key for the described subpool 0022 34 Signed 2 SUBLASTO Size of last piece causing new part pg 0024 36 Signed 4 SUBTAILP Tail pointer-partially allocated chain 0028 40 Signed 4 SUBFPTHD Head pointer for full-partial chain 002C 44 Signed 4 SUBFPTTL Tail pointer for full-partial chain 00000030 SUBSIZEB *-SUBBK Size of a SUBBK in bytes 00000006 SUBSIZED (SUBSIZEB+7)/8 Size of a SUBBK in D-words
SUBBK Storage Layout
*** SUBBK - Subpool descriptor block * * +---------------------------+---------------------------+ * 0 | SUBFORWD | SUBBACKW | * +---------------------------+---------------------------+ * 8 | SUBSHFOR | SUBSHBAC | * +---------------------------+---------------------------+ * 10 | SUBPARTP | SUBFULLP | * +---------------------------+---------------------------+ * 18 | SUBPNAME | * +------+------+-------------+---------------------------+ * 20 |:PFLAG|:PKEY | SUBLASTO | SUBTAILP | * +------+------+-------------+---------------------------+ * 28 | SUBFPTHD | SUBFPTTL | * +---------------------------+---------------------------+ * 30 * *** SUBBK - Subpool descriptor block
SUBBK Cross Reference
(contains links to field and bit definitions)Symbol Dspl Value -------------- ---- -----SUBBACKW 0004
SUBFORWD 0000
SUBFPTHD 0028
SUBFPTTL 002C
SUBFULLP 0014
SUBLASTO 0022
SUBLASTP 0020 80
SUBPARTP 0010
SUBPFLAG 0020
SUBPGLOB 0020 03
SUBPKEY 0021
SUBPNAME 0018
SUBPNEW 0020 04
SUBPPRIV 0020 01
SUBPSHAR 0020 02
SUBPSYST 0020 40
SUBSHBAC 000C
SUBSHFOR 0008
SUBSIZEB 002C 00000030
SUBSIZED 002C 00000006
SUBTAILP 0024
Last updated on 12 Aug 1999 at 11:13:51 EDT.
Copyright IBM Corporation, 1990, 1999