ALET Back to Index page
 
Prolog 
Control Block Contents 
   ALET DSECT
Storage Layout 
Cross Reference (Contains links to field and bit definitions)
Programming Interface Information:
This information is NOT intended to be
used as Programming Interfaces of z/VM.


  ALET Prolog Top of page
 
 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 Top of page
 

 ALET DSECT Top of page
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 Top of page
 
 
*** ALET - Access List Entry Token
*
*     +------+------+-------------+
*   0 |ALET0 |ALETSN|   ALETEN    | 4
*     +------+------+-------------+
*
*** ALET - Access List Entry Token
 
 
  ALET Cross Reference Top of page
 
 
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
 
This information is based on z/VM 6.4.0 Last updated on 24 Aug 2016 at 09:22:33 EDT.
Copyright IBM Corporation, 1990, 2016