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PMCIDR1, Performance Monitors Component Identification Register 1

The PMCIDR1 characteristics are:

Purpose

Provides information to identify a Performance Monitor component.

For more information, see 'About the Component Identification scheme'.

Configuration

Implementation of this register is OPTIONAL.

If ARMv8.3-DoPD is implemented, this register is in the Core power domain. If ARMv8.3-DoPD is not implemented, this register is in the Debug power domain.

This register is required for CoreSight compliance.

Attributes

PMCIDR1 is a 32-bit register.

Field descriptions

The PMCIDR1 bit assignments are:

313029282726252423222120191817161514131211109876543210
RES0CLASSPRMBL_1

Bits [31:8]

Reserved, RES0.

CLASS, bits [7:4]

Component class. Reads as 0x9, debug component.

PRMBL_1, bits [3:0]

Preamble. RAZ.

Accessing the PMCIDR1

PMCIDR1 can be accessed through the external debug interface:

ComponentOffsetInstance
PMU0xFF4PMCIDR1

This interface is accessible as follows:

  • When ARMv8.3-DoPD is not implemented or IsCorePowered() accesses to this register are RO.
  • Otherwise accesses to this register generate an error response.