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EDDEVTYPE, External Debug Device Type register

The EDDEVTYPE characteristics are:

Purpose

Indicates to a debugger that this component is part of a PEs debug logic.

Configuration

It is IMPLEMENTATION DEFINED whether EDDEVTYPE 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.

Attributes

EDDEVTYPE is a 32-bit register.

Field descriptions

The EDDEVTYPE bit assignments are:

313029282726252423222120191817161514131211109876543210
RES0SUBMAJOR

Bits [31:8]

Reserved, RES0.

SUB, bits [7:4]

Subtype. Must read as 0x1 to indicate this is a component within a PE.

MAJOR, bits [3:0]

Major type. Must read as 0x5 to indicate this is a debug logic component.

Accessing the EDDEVTYPE

EDDEVTYPE can be accessed through the external debug interface:

ComponentOffsetInstance
Debug0xFCCEDDEVTYPE

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.


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