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# MPAMCFG_EN_FLAGS, MPAM Partition Configuration Enable Flags Register

The MPAMCFG_EN_FLAGS characteristics are:

## Purpose

Enable flags for 32 PARTIDs.

MPAMCFG_EN_FLAGS_s gives read/write access to 32 Secure PARTIDs. MPAMCFG_EN_FLAGS_ns gives read/write access to 32 Non-secure PARTIDs. MPAMCFG_EN_FLAGS_rl gives read/write access to 32 Realm PARTIDs. MPAMCFG_EN_FLAGS_rt gives read/write access to 32 Root PARTIDs.

## Configuration

The power domain of MPAMCFG_EN_FLAGS is IMPLEMENTATION DEFINED.

This register is present only when (FEAT_MPAMv0p1 is implemented or FEAT_MPAMv1p1 is implemented) and MPAMF_IDR.HAS_ENDIS == 1. Otherwise, direct accesses to MPAMCFG_EN_FLAGS are RES0.

## Attributes

MPAMCFG_EN_FLAGS is a 32-bit register.

## Field descriptions

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
EN31 | EN30 | EN29 | EN28 | EN27 | EN26 | EN25 | EN24 | EN23 | EN22 | EN21 | EN20 | EN19 | EN18 | EN17 | EN16 | EN15 | EN14 | EN13 | EN12 | EN11 | EN10 | EN9 | EN8 | EN7 | EN6 | EN5 | EN4 | EN3 | EN2 | EN1 | EN0

#### EN<x>, bit [x], for x = 31 to 0

PARTID Enable flags. The group of flags accessed is selected by MPAMCFG_PART_SEL.PARTID_SEL & 0xFFE0 in bit [0] to (MPAMCFG_PART_SEL.PARTID_SEL & 0xFFE0) + 31 in bit [31].

EN<x> | Meaning
--- | ---
0b0 | The PARTID is disabled.
0b1 | The PARTID is enabled.

Each bit in MPAMCFG_EN_FLAGS gives access to the same state as controlled by MPAMCFG_EN and MPAMCFG_DIS.

Bits MPAMCFG_EN_FLAGS.EN<x>, where (MPAMCFG_PART_SEL.PARTID_SEL & 0xFFE0) + x is greater than MPAMF_IDR.PARTID_MAX, are not required to be implemented.

As with other partitioning controls, the enable flag for PARTID 0 must be reset to 0b1 (enabled).

## Accessing MPAMCFG_EN_FLAGS

This register is within the MPAM feature page memory frames.

In a system that supports Secure, Non-secure, Root, and Realm memory maps, there must be MPAM feature pages in all four address maps:

- MPAMCFG_EN_FLAGS_s must only be accessible from the Secure MPAM feature page.
- MPAMCFG_EN_FLAGS_ns must only be accessible from the Non-secure MPAM feature page.
- MPAMCFG_EN_FLAGS_rt must only be accessible from the Root MPAM feature page.
- MPAMCFG_EN_FLAGS_rl must only be accessible from the Realm MPAM feature page.

MPAMCFG_EN_FLAGS_s, MPAMCFG_EN_FLAGS_ns, MPAMCFG_EN_FLAGS_rt, and MPAMCFG_EN_FLAGS_rl must be separate registers:

- The Secure instance (MPAMCFG_EN_FLAGS_s) accesses the PARTID enable used for Secure PARTIDs.
- The Non-secure instance (MPAMCFG_EN_FLAGS_ns) accesses the PARTID enable used for Non-secure PARTIDs.
- The Root instance (MPAMCFG_EN_FLAGS_rt) accesses the PARTID enable used for Root PARTIDs.
- The Realm instance (MPAMCFG_EN_FLAGS_rl) accesses the PARTID enable used for Realm PARTIDs.

When RIS is implemented, loads and stores to MPAMCFG_EN_FLAGS access the PARTID enable configuration settings for the PARTID enable resource instance selected by MPAMCFG_PART_SEL.RIS and the PARTID selected by MPAMCFG_PART_SEL.PARTID_SEL.

When RIS is not implemented, loads and stores to MPAMCFG_EN_FLAGS access the PARTID enable configuration settings for the PARTID selected by MPAMCFG_PART_SEL.PARTID_SEL.

When PARTID narrowing is implemented, loads and stores to MPAMCFG_EN_FLAGS access the PARTID enable configuration settings for the internal PARTID selected by MPAMCFG_PART_SEL.PARTID_SEL, and MPAMCFG_PART_SEL.INTERNAL must be 1.

When PARTID narrowing is not implemented, loads and stores to MPAMCFG_EN_FLAGS access the PARTID enable configuration settings for the request PARTID selected by MPAMCFG_PART_SEL.PARTID_SEL, and MPAMCFG_PART_SEL.INTERNAL must be 0.

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

Component | Frame | Offset | Instance
--- | --- | --- | ---
MPAM | MPAMF_BASE_s | 0x0320 | MPAMCFG_EN_FLAGS_s

Accesses on this interface are RW.

Component | Frame | Offset | Instance
--- | --- | --- | ---
MPAM | MPAMF_BASE_ns | 0x0320 | MPAMCFG_EN_FLAGS_ns

Accesses on this interface are RW.

Component | Frame | Offset | Instance
--- | --- | --- | ---
MPAM | MPAMF_BASE_rt | 0x0320 | MPAMCFG_EN_FLAGS_rt

When FEAT_RME is implemented, accesses on this interface are RW.

Component | Frame | Offset | Instance
--- | --- | --- | ---
MPAM | MPAMF_BASE_rl | 0x0320 | MPAMCFG_EN_FLAGS_rl

When FEAT_RME is implemented, accesses on this interface are RW.

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

26/03/2024 09:49; 67c0ae5282a7629ba0ea0ba7267b43cd4f7939f6

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