GICM_IIDR, Distributor Implementer Identification Register

The GICM_IIDR characteristics are:

Purpose

Provides information about the implementer and revision of the Distributor.

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

GICM_IIDR is a 32-bit register.

31	30	29	28	27	26	25	24	23	22	21	20	19	18	17	16	15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
ProductID								RES0				Variant				Revision				Implementer

Product Identifier.

This field has an IMPLEMENTATION DEFINED value.

Access to this field is RO.

Reserved, RES0.

Variant number. Typically, this field is used to distinguish product variants, or major revisions of a product.

This field has an IMPLEMENTATION DEFINED value.

Access to this field is RO.

Revision number. Typically, this field is used to distinguish minor revisions of a product.

This field has an IMPLEMENTATION DEFINED value.

Access to this field is RO.

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

Bits [11:8] are the JEP106 continuation code of the implementer. For an Arm implementation, this field is 0x4.
Bit [7] is always 0.
Bits [6:0] are the JEP106 identity code of the implementer. For an Arm implementation, bits [7:0] are therefore 0x3B.

This field has an IMPLEMENTATION DEFINED value.

Access to this field is RO.

Component	Frame	Offset	Instance
GIC Distributor	MSI_base	0x0FCC	GICM_IIDR

Accesses to this register are RO.

15/12/2024 22:27; 5e0a212688c6bd7aee92394b6f5e491b4d0fee1d