P64Q entry for 64-bit PLO queue manager events (IUTP64QM macro) (Part 1)

Entry:

P64Q

VIT option:

CIA

Event:

Queue management using IUTP64QM

VIT processing module:

ISTITCSH

Control is returned to:

IUTP64QM issuer

This trace record is written when the IUTP64QM macro is run. The record is primarily used to identify the addition or removal of elements to or from a queue header by using the perform locked operation (PLO) assembler instruction.

Byte (hex)

Contents

00–03

Record ID: C'P64Q'

04

ID is the primary address space ID (ASID). This field is 0 if the ASID is greater than X'FF'.

05

0

06

IUTP64QM return code

• Add_Chain return codes:

  Code value

  Meaning

  X'00'

  Add_Chain successful and Synch_Byte mask operation was performed (if specified).

  X'04'

  Add_Chain successful but Synch_Byte mask operation was not performed (LE|GE failed).

• Remove_Element return codes:

  Code value

  Meaning

  X'00'

  Remove_Element successful and Synch_Byte mask operation was performed (if specified).

  X'04'

  Remove_Element successful but Synch_Byte mask operation was not performed (LE|GE failed).

  X'08'

  Remove_Element unsuccessful but Synch_Byte mask operation was performed (if specified).

  X'0C'

  Remove_Element unsuccessful and Synch_Byte mask operation was not performed (LE|GE failed).

• Synch_Byte return codes:

  Code value

  Meaning

  X'00'

  Synch_Byte mask operation was performed.

  X'04'

  Synch_Byte mask operation was not performed (LE|GE failed).

07

Function:

C'A'

For Add_Chain

C'R'

For Remove_Element

C'S'

For Synch_byte_only

08–0B

Address of caller (within IUTP64QM expansion)

0C

Contents of synch byte before the PLO assembler instruction

0D

Contents of synch byte after the PLO assembler instruction

0E–0F

Contents of count field after the PLO assembler instruction

10–18

Element address:

• For Add_Chain, address of first element in chain
• For Remove_Element, address of element removed
• For Synch_byte_only, 0

19–1F

PLO queue manager header address (IUTP64QH)