GITS_IIDR

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

Attributes

Field descriptions

ProductID, bits [31:24]

Product Identifier.

This field has an IMPLEMENTATION DEFINED value.

Access to this field is RO.

Bits [23:20]

Variant, bits [19:16]

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, bits [15:12]

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.

Implementer, bits [11:0]

Contains the JEP106 manufacturer's identification code of the designer of the ITS.

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 GITS_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.

Accessing GITS_IIDR

GITS_IIDR can be accessed through the memory-mapped interfaces:

GITS_IIDR, ITS Identification 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