PMPIDR1, Performance Monitors Peripheral Identification Register 1
The PMPIDR1 characteristics are:
Provides information to identify a Performance Monitor component.
For more information see 'About the Peripheral identification scheme' in the Arm® Architecture Reference Manual, Armv8, for Armv8-A architecture profile, section H8 (About the External Debug Registers).
It is IMPLEMENTATION DEFINED whether PMPIDR1 is implemented in the Core power domain or in the Debug power domain.
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.
PMPIDR1 is a 32-bit register.
The PMPIDR1 bit assignments are:
DES_0, bits [7:4]
Designer, least significant nibble of JEP106 ID code. For Arm Limited, this field is 0b1011.
PART_1, bits [3:0]
Part number, most significant nibble.
Accessing the PMPIDR1
PMPIDR1 can be accessed through the external debug interface:
This interface is accessible as follows:
- When ARMv8.3-DoPD is not implemented or IsCorePowered() access to this register is RO.
- Otherwise access to this register returns an Error.