Programming Interface Information:
This information is NOT intended to be used as Programming Interfaces of z/VM. |
ALET
Control Block Contents
ALET DSECT
Cross Reference (Contains links to field and bit definitions)
ALET Prolog
NAME : HCPALET DESCRIPTION: Access List Entry Token DSECT : ALET FUNCTION : The ALET maps the contents of an access register referred to as an Access List Entry Token. In the general case they designate an entry in an access list and are used in access register translation. LOCATED BY : Maps the contents of an access register CREATED BY : ALETs designating entries in access lists built by CP are created by HCPALMCR. DELETED BY : ALETs designating entries in access lists built by CP are deleted by HCPALMCR. SERIALIZED : This DSECT is to map guest storage, the user of the DSECT is responsible for serialization. ALETs designating entries in access lists biult by CP are generally serialized by task ownership. RELOCATION CONSIDERATIONS : None
ALET Control Block Content
ALET DSECT
Hex Dec Type/Val Lng Label (dup) Comments ---- ---- --------- ---- -------------- -------- 0000 0 Structure ALET Access List Entry Token List Entry Token 0000 0 Bitstring 4 * (0) .... .... ALETZERM X'FE000000' Mask of bits which must be zeros .... .... ALETPSM X'01000000' Mask for primary-list bit 00FF0000 ALETASNM X'00FF0000' Mask for ALE sequence number 0000FFFF ALETALNM X'0000FFFF' Mask for access-list entry number. .... .... ALETPRIM X'00000000' Special ALET for primary space .... ...1 ALETSECO X'00000001' Special ALET for secondary space 0000 0 Bitstring 1 ALET0 .... ...1 ALETPRL X'01' ALETPRL Primary-list bit Specifies which Access List(AL) contains the ALE 0 - Dispatchable Unit AL 1 - Primary space AL 0001 1 Bitstring 1 ALETSN Access list entry sequence number 0002 2 Signed 2 ALETEN Access list entry number 00000004 ALETLEN *-ALET Entry size in bytes 00000001 ALETSIZE (ALETLEN+7)/8 Size in doublewords of the ALET
ALET Storage Layout
*** ALET - Access List Entry Token * * +------+------+-------------+ * 0 |ALET0 |ALETSN| ALETEN | 4 * +------+------+-------------+ * *** ALET - Access List Entry Token
ALET Cross Reference
Symbol Dspl Value -------------- ---- ----- ALETALNM 0000 0000FFFF ALETASNM 0000 00FF0000 ALETEN 0002 ALETLEN 0002 00000004 ALETPRIM 0000 00 ALETPRL 0000 01 ALETPSM 0000 00 ALETSECO 0000 01 ALETSIZE 0002 00000001 ALETSN 0001 ALETZERM 0000 00 ALET0 0000
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