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# MPAMCFG_INTPARTID, MPAM Internal PARTID Narrowing Configuration Register

The MPAMCFG_INTPARTID characteristics are:

## Purpose

MPAMCFG_INTPARTID is a 32-bit read-write register that controls the mapping of the PARTID selected by MPAMCFG_PART_SEL into a narrower internal PARTID (intPARTID).

The MPAMCFG_INTPARTID register associates the request PARTID (reqPARTID) in the MPAMCFG_PART_SEL register with an internal PARTID (intPARTID) in this register. To set that association, store reqPARTID into the MPAMCFG_PART_SEL register and then store the intPARTID into the MPAMCFG_INTPARTID register. To read the association, store reqPARTID into the MPAMCFG_PART_SEL register and then read MPAMCFG_INTPARTID.

If the intPARTID stored into MPAMCFG_INTPARTID is out-of-range or does not have the INTERNAL bit set, the association of reqPARTID to intPARTID is not written and MPAMF_ESR is set to indicate an intPARTID_Range error.

If MPAMCFG_PART_SEL.INTERNAL is 1 when MPAMCFG_INTPARTID is read or written, MPAMF_ESR is set to indicate an unexpected_internal error.

## Configuration

The power domain of MPAMCFG_INTPARTID is IMPLEMENTATION DEFINED.

This register is present only when MPAMF_IDR.HAS_PARTID_NRW == 1. Otherwise, direct accesses to MPAMCFG_INTPARTID are IMPLEMENTATION DEFINED.

## Attributes

MPAMCFG_INTPARTID is a 32-bit register.

## Field descriptions

The MPAMCFG_INTPARTID 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
RES0 | INTERNAL | INTPARTID

#### Bits [31:17]

Reserved, RES0.

#### INTERNAL, bit [16]

Internal PARTID flag.

This bit must be 1 when written to the register. If written as 0, the write will not update the reqPARTID to intPARTID association.

On a read of this register, the bit will always read the value last written.

#### INTPARTID, bits [15:0]

This field contains the intPARTID mapped to the reqPARTID in MPAMCFG_PART_SEL.

The maximum intPARTID supported is MPAMF_PARTID_NRW_IDR.INTPARTID_MAX.

## Accessing the MPAMCFG_INTPARTID

This register is part of the MPAMF_BASE memory frame. In a system that supports Secure and Non-secure memory maps, the MPAMF_BASE frame must be accessible in both Secure and Non-secure memory address maps.

MPAMCFG_INTPARTID must be accessible from the Non-secure and Secure address maps.

MPAMCFG_INTPARTID must be banked for the Secure and Non-secure address maps. The Secure instance accesses the PARTID narrowing used for Secure PARTIDs, and the Non-secure instance accesses the PARTID narrowing used for Non-secure PARTIDs.

#### MPAMCFG_INTPARTID can be accessed through the memory-mapped interfaces:

Component | Frame | Offset | Instance
--- | --- | --- | ---
MPAM.any | MPAMF_BASE_s | 0x0600 | MPAMCFG_INTPARTID_s

Access on this interface is RW.

Component | Frame | Offset | Instance
--- | --- | --- | ---
MPAM.any | MPAMF_BASE_ns | 0x0600 | MPAMCFG_INTPARTID_ns

Access on this interface is RW.

AArch32 Registers | AArch64 Registers | AArch32 Instructions | AArch64 Instructions | Index by Encoding | External Registers | External Registers by Offset | Registers by Functional Group | Proprietary Notice

15/04/2019 16:47; 8c23526ba8a13a72aada4137daf3e3977b49036e

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