MPAMF_IIDR, MPAM Implementation Identification Register
The MPAMF_IIDR characteristics are:
Purpose
Uniquely identifies the MSC implementation by the combination of implementer, product ID, variant and revision.
Configuration
The power domain of MPAMF_IIDR is IMPLEMENTATION DEFINED.
Attributes
MPAMF_IIDR is a 32-bit register.
Field descriptions
The MPAMF_IIDR bit assignments are:
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 | Variant | Revision | Implementer |
ProductID, bits [31:20]
IMPLEMENTATION DEFINED value identifying the MPAM MSC.
The MSC implementer as identified in the MPAMF_IIDR.Implementer field must assure each product has a unique ProductID from any other with the same Implementer value.
Variant, bits [19:16]
IMPLEMENTATION DEFINED value used to distinguish product variants, or major revisions of the product.
Implementations of ProductID with differing software interfaces are expected to have different values in the MPAMF_IIDR.Variant field.
Revision, bits [15:12]
IMPLEMENTATION DEFINED value used to distinguish minor revisions of the product.
This field is intended to differentiate product revisions that are minor changes and are largely software compatible with previous revisions.
Implementer, bits [11:0]
Contains the JEP106 code of the company that implemented the MPAM MSC.
[11:8] must contain the JEP106 continuation code of the implementer.
[7] must always be 0.
[6:0] must contain the JEP106 identity code of the implementer.
For an Arm implementation, bits[11:0] are 0x43B.
Accessing the MPAMF_IIDR
This register is within the MPAM feature page memory frames. In a system that supports Secure and Non-secure memory maps, there must be both Secure and Non-secure MPAM feature pages.
MPAMF_IIDR is read-only.
MPAMF_IIDR must be readable from the Non-secure and Secure MPAM feature pages.
MPAMF_IIDR must have the same contents in the Secure and Non-secure MPAM feature pages.
MPAMF_IIDR can be accessed through the memory-mapped interfaces:
Component | Frame | Offset | Instance |
---|---|---|---|
MPAM | MPAMF_BASE_s | 0x0018 | MPAMF_IIDR |
Accesses on this interface are RO.
Component | Frame | Offset | Instance |
---|---|---|---|
MPAM | MPAMF_BASE_ns | 0x0018 | MPAMF_IIDR |
Accesses on this interface are RO.