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EDDEVAFF1, External Debug Device Affinity register 1

The EDDEVAFF1 characteristics are:

Purpose

Copy of the high half of the PE MPIDR_EL1 register that allows a debugger to determine which PE in a multiprocessor system the external debug component relates to.

Configuration

It is IMPLEMENTATION DEFINED whether EDDEVAFF1 is implemented in the Core power domain or in the Debug power domain.

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.

Attributes

EDDEVAFF1 is a 32-bit register.

Field descriptions

The EDDEVAFF1 bit assignments are:

313029282726252423222120191817161514131211109876543210
MPIDR_EL1 high half

MPIDR_EL1 high half, bits [31:0]

MPIDR_EL1 high half. Read-only copy of the high half of MPIDR_EL1, as seen from the highest implemented Exception level.

Accessing the EDDEVAFF1

EDDEVAFF1 can be accessed through the external debug interface:

ComponentOffsetInstance
Debug0xFACEDDEVAFF1

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.


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