|
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. |
DCPU
Cross Reference (Contains links to field and bit definitions)
DCPU Prolog
NAME : HCPDCPU
DESCRIPTION: Directory CPU Block
DSECT : DCPU
FUNCTION : The DCPU block contains information derived from one
Directory CPU statement.
LOCATED BY : DVMDCDAS (Directory DASD address)
DVMDCDSP (Offset within a page)
CREATED BY : HCPDIR, HCPUDS
DELETED BY : HCPLGN
SERIALIZED : HCPDIR executes in the guest's virtual machine,
therefore, MP serialization does not apply there.
HCPUDS operates under the directory lock.
NOTES : The size of this block must ALWAYS be a doubleword multiple.
Entry point HCPUDSCP fills a buffer with these blocks.
In order for the caller of this entry point to use the DCPU
DSECT correctly, the blocks must be DW aligned. The logic
in HCPUDSCP and for the caller is simplified when this
constraint is followed.
DCPU Control Block Content
DCPU DSECT
Hex Dec Type/Val Lng Label (dup) Comments ---- ---- --------- ---- -------------- -------- 0000 0 Structure DCPU Directory CPU Block 0000 0 Signed 4 DCPUDASD DASD address of the next DCPU CCPV for CKD DASD addresses PPPV for FBA DASD addresses 0004 4 Signed 2 DCPUDISP offset to the next DCPU 0006 6 Signed 2 DCPUADDR CPU address. Valid range is 0-3F. 0008 8 Bitstring 3 DCPUID CPU ID. Becomes bits 8-31 of the response to the STIPD instruction. 000B 11 Bitstring 1 DCPUFLGS CPU definition flags. 1... .... DCPUVECT X'80' ON if VECTOR specified. .1.. .... DCPUNOVE X'40' ON if NOVECTOR specified. ..1. .... DCPUIDFL X'20' ON if CPUID specified. ...1 .... DCPUDED X'10' ON if DEDICATE specified. .... 1... DCPUNDED X'08' ON if NODEDICATE specified. .... .1.. DCPUCRYP X'04' ON if CRYPTO specified. 000C 12 Signed 4 * Reserved for future IBM use. 00000002 DCPUSIZE (*-DCPU+7)/8 DCPU block size in DW's. 00000010 DCPULEN (*-DCPU) DCPU block size in bytes.
DCPU Storage Layout
*** DCPU - Directory CPU Block * * +---------------------------+-------------+-------------+ * 0 | DCPUDASD | DCPUDISP | DCPUADDR | * +--------------------+------+-------------+-------------+ * 8 | DCPUID |:UFLGS|///////////////////////////| * +--------------------+------+---------------------------+ * 10 * *** DCPU - Directory CPU Block
DCPU Cross Reference
(contains links to field and bit definitions)Symbol Dspl Value -------------- ---- -----DCPUADDR 0006
DCPUCRYP 000B 04
DCPUDASD 0000
DCPUDED 000B 10
DCPUDISP 0004
DCPUFLGS 000B
DCPUID 0008
DCPUIDFL 000B 20
DCPULEN 000C 00000010
DCPUNDED 000B 08
DCPUNOVE 000B 40
DCPUSIZE 000C 00000002
DCPUVECT 000B 80
Last updated on 3 Aug 1999 at 11:50:03 EDT.
Copyright IBM Corporation, 1990, 1999