GITS_IIDR, ITS Identification Register

The GITS_IIDR characteristics are:

Purpose

Provides information about the implementer and revision of the ITS.

Configuration

This register is available in all configurations of the GIC. If the GIC implementation supports two Security states, this register is Common.

Attributes

GITS_IIDR is a 32-bit register.

Field descriptions

The GITS_IIDR bit assignments are:

313029282726252423222120191817161514131211109876543210
ProductIDRES0VariantRevisionImplementer

ProductID, bits [31:24]

An IMPLEMENTATION DEFINED product identifier.

Bits [23:20]

Reserved, RES0.

Variant, bits [19:16]

An IMPLEMENTATION DEFINED variant number. Typically, this field is used to distinguish product variants, or major revisions of a product.

Revision, bits [15:12]

An IMPLEMENTATION DEFINED revision number. Typically, this field is used to distinguish minor revisions of a product.

Implementer, bits [11:0]

Contains the JEP106 code of the company that implemented the ITS:

Accessing the GITS_IIDR

GITS_IIDR can be accessed through the memory-mapped interfaces:

ComponentOffsetInstance
GIC ITS control0x0004GITS_IIDR

This interface is accessible as follows:




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