GICD_IIDR, Distributor Implementer Identification Register

The GICD_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.

GICD_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 manufacturer's identification code of the designer of the Distributor.

The code identifies the designer of the component, which might not be the same as the implementer of the device containing the component.

Zero is not a valid JEP106 identification code, meaning a value of zero for GICD_IIDR indicates this register is not implemented.

For an implementation designed by Arm, this field reads as 0x43B.

Bits [11:8] contain the JEP106 bank identifier of the designer minus 1.

Bit 7 is RES0.

Bits [6:0] contain bits [6:0] of the JEP106 manufacturer's identification code of the designer.

This field has an IMPLEMENTATION DEFINED value.

Access to this field is RO.

Component	Frame	Offset	Instance
GIC Distributor	Dist_base	0x0008	GICD_IIDR

Accesses to this register are RO.

15/12/2024 22:27; 5e0a212688c6bd7aee92394b6f5e491b4d0fee1d