CTIDEVID, CTI Device ID register 0

The CTIDEVID characteristics are:

Purpose

Describes the CTI component to the debugger.

Configuration

CTIDEVID is in the Debug power domain.

Attributes

CTIDEVID is a 32-bit register.

Field descriptions

313029282726252423222120191817161514131211109876543210
RES0INOUTRES0NUMCHANRES0NUMTRIGRES0EXTMUXNUM

Bits [31:26]

Reserved, RES0.

INOUT, bits [25:24]

Input/output options. Indicates presence of the input gate. If the CTM is not implemented or CTIv2 is not implemented, this field is RAZ.

INOUTMeaning
0b00

CTIGATE does not mask propagation of input events from external channels.

0b01

CTIGATE masks propagation of input events from external channels.

All other values are reserved.

Bits [23:22]

Reserved, RES0.

NUMCHAN, bits [21:16]

Number of ECT channels implemented. For Armv8, valid values are:

and so on up to 0b100000, 32 channels (0..31) implemented.

All other values are reserved.

This field has an IMPLEMENTATION DEFINED value.

Access to this field is RO.

Bits [15:14]

Reserved, RES0.

NUMTRIG, bits [13:8]

Number of triggers implemented. This is one more than the index of the largest trigger, rather than the actual number of triggers. For Armv8, valid values are:

and so on up to 0b100000, 32 triggers (0..31) implemented.

All other values are reserved. If the PE contains a Trace extension, this field must be at least 0b001000. There is no guarantee that any of the implemented triggers, including the highest numbered, are connected to any components.

This field has an IMPLEMENTATION DEFINED value.

Access to this field is RO.

Bits [7:5]

Reserved, RES0.

EXTMUXNUM, bits [4:0]

Number of multiplexors available on triggers. This value is used in conjunction with External Control register, ASICCTL.

This field has an IMPLEMENTATION DEFINED value.

Access to this field is RO.

Accessing CTIDEVID

CTIDEVID can be accessed through the external debug interface:

ComponentOffsetInstance
CTI0xFC8CTIDEVID

Accesses on this interface are RO.


30/09/2021 14:53; 092b4e1bbfbb45a293b198f9330c5f529ead2b0f

Copyright © 2010-2021 Arm Limited or its affiliates. All rights reserved. This document is Non-Confidential.