CNTVCT, Counter-timer Virtual Count

The CNTVCT characteristics are:

Purpose

Holds the 64-bit virtual count value.

Configuration

The power domain of CNTVCT is IMPLEMENTATION DEFINED.

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

Attributes

CNTVCT is a 64-bit register.

Field descriptions

The CNTVCT bit assignments are:

6362616059585756555453525150494847464544434241403938373635343332
Virtual count value
Virtual count value
313029282726252423222120191817161514131211109876543210

Bits [63:0]

Virtual count value.

Accessing the CNTVCT

CNTVCT can be implemented in any implemented CNTBaseN frame, and in the corresponding CNTEL0BaseN frame, as a RO register.

'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:

For an implemented CNTEL0BaseN frame:

If the implementation supports 64-bit atomic accesses, then the CNTVCT register must be accessible as an atomic 64-bit value.

CNTVCT can be accessed through the memory-mapped interfaces:

ComponentFrameOffsetInstanceRange
TimerCNTBaseN0x008CNTVCT31:0

Accesses on this interface are RO.

ComponentFrameOffsetInstanceRange
TimerCNTBaseN0x00CCNTVCT63:32

Accesses on this interface are RO.

ComponentFrameOffsetInstanceRange
TimerCNTEL0BaseN0x008CNTVCT31:0

Accesses on this interface are RO.

ComponentFrameOffsetInstanceRange
TimerCNTEL0BaseN0x00CCNTVCT63:32

Accesses on this interface are RO.




01/07/2020 15:57; 80324f0b9997bede489cc15ad1565345720bcd2a

Copyright © 2010-2020 Arm Limited or its affiliates. All rights reserved. This document is Non-Confidential.