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PMDEVARCH, Performance Monitors Device Architecture register

The PMDEVARCH characteristics are:

Purpose

Identifies the programmers' model architecture of the Performance Monitor component.

Configuration

If FEAT_DoPD is implemented, this register is in the Core power domain. If FEAT_DoPD is not implemented, this register is in the Debug power domain.

Attributes

PMDEVARCH is a 32-bit register.

Field descriptions

313029282726252423222120191817161514131211109876543210
ARCHITECTPRESENTREVISIONARCHVERARCHIDARCHPART

ARCHITECT, bits [31:21]

Defines the architecture of the component. For Performance Monitors, this is Arm Limited.

Bits [31:28] are the JEP106 continuation code, 0x4.

Bits [27:21] are the JEP106 ID code, 0x3B.

Reads as 0b01000111011.

Access to this field is RO.

PRESENT, bit [20]

Indicates that the DEVARCH is present.

Reads as 0b1.

Access to this field is RO.

REVISION, bits [19:16]

Defines the architecture revision. For architectures defined by Arm this is the minor revision.

For Performance Monitors, the revision defined by Armv8 is 0x0.

All other values are reserved.

Reads as 0b0000.

Access to this field is RO.

ARCHVERARCHID, bits [15:120]

ArchitectureDefines Version.this Definespart theto architecturebe versionan ofArmv8 thedebug component. For architectures defined by Arm this is further subdivided.

AllFor otherPerformance values are reserved.Monitors:

This corresponds to Performance Monitors architecture version PMUv3.

Note

The PMUv3 memory-mapped programmers' model can be used by devices other than Armv8 processors. Software must determine whether the PMU is attached to an Armv8 processor by using the PMDEVAFF0 and PMDEVAFF1 registers to discover the affinity of the PMU to any Armv8 processors.

PMDEVARCH.ARCHVER and PMDEVARCH.ARCHPART are also defined as a single field, PMDEVARCH.ARCHID, so that PMDEVARCH.ARCHVER is PMDEVARCH.ARCHID[15:12].

Reads as 0b0010.

Access to this field is RO.

ARCHPART, bits [11:0]

Architecture Part. Defines the architecture of the component.

ARCHPARTMeaningApplies when
0xA16

Armv8-A PE performance monitors.

0xA26

Armv8-A PE performance monitors, including the 64-bit programmers' model extension.

From Armv8.8

PMDEVARCH.ARCHVER and PMDEVARCH.ARCHPART are also defined as a single field, PMDEVARCH.ARCHID, so that PMDEVARCH.ARCHPART is PMDEVARCH.ARCHID[11:0].

Access to this field is RO.

Accessing PMDEVARCH

PMDEVARCH can be accessed through the external debug interface:

ComponentOffsetInstance
PMU0xFBCPMDEVARCH

This interface is accessible as follows:


3020/09/2021 1511:3301; 092b4e1bbfbb45a293b198f9330c5f529ead2b0fd4a233ffbdfb36e47856c443a7ce9a85f5e501ca

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