CNTVOFF, Counter-timer Virtual Offset

The CNTVOFF characteristics are:

Purpose

Holds the 64-bit virtual offset for a CNTBaseN frame that has virtual timer capability. This is the offset between real time and virtual time.

Configuration

The power domain of CNTVOFF is IMPLEMENTATION DEFINED.

For more information, see 'Power and reset domains for the system level implementation of the Generic Timer'.

Attributes

CNTVOFF is a 64-bit register.

Field descriptions

6362616059585756555453525150494847464544434241403938373635343332
313029282726252423222120191817161514131211109876543210
Virtual offset
Virtual offset

Bits [63:0]

Virtual offset.

The reset behavior of this field is:

Accessing CNTVOFF

CNTVOFF is implemented, as a RO register, in any implemented CNTBaseN frame that has virtual timer capability.

'CNTCTLBase status and control fields for the CNTBaseN and CNTEL0BaseN frames' describes the status fields that identify whether a CNTBaseN frame is implemented, and for an implemented frame:

For an implemented CNTBaseN frame that has virtual timer capability:

Note

CNTVOFF is never visible in any CNTEL0BaseN frame. This means that the CNTVOFF address in any implemented CNTEL0BaseN frame is RAZ/WI.

In an implementation that supports 64-bit atomic accesses, a CNTVOFF{<n>} register must be accessible as an atomic 64-bit value.

CNTVOFF can be accessed through the memory-mapped interfaces:

ComponentFrameOffsetRange
TimerCNTBaseN0x01831:0

Accesses to this interface are RO.

ComponentFrameOffsetRange
TimerCNTBaseN0x01C63:32

Accesses to this interface are RO.


30/09/2022 15:57; 21c5a6dd0fdaf10a712e2f2d6fffbdbd66d4d96f

Copyright © 2010-2022 Arm Limited or its affiliates. All rights reserved. This document is Non-Confidential.