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MPAMCFG_DIS, MPAM Partition Configuration Disable Register

The MPAMCFG_DIS characteristics are:

Purpose

Disables a PARTID configuration as set in other MPAMCFG registers.

MPAMCFG_DIS_s disables a Secure PARTID. MPAMCFG_DIS_ns disables a Non-secure PARTID. MPAMCFG_DIS_rl disables a Realm PARTID. MPAMCFG_DIS_rt disables a Root PARTID.

Configuration

The power domain of MPAMCFG_DIS 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_DIS are RES0.

The power and reset domain of each MSC component is specific to that component.

Attributes

MPAMCFG_DIS is a 32-bit register.

Field descriptions

NFU, bit [31]
When MPAMF_IDR.HAS_NFU == 1:

Otherwise:

Bits [30:16]

PARTID, bits [15:0]

Accessing MPAMCFG_DIS

If both FEAT_MPAM and FEAT_RME are implemented, the following statements apply:

• 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_DIS_s must only be accessible from the Secure MPAM feature page.

• MPAMCFG_DIS_ns must only be accessible from the Non-secure MPAM feature page.

• MPAMCFG_DIS_rt must only be accessible from the Root MPAM feature page.

• MPAMCFG_DIS_rl must only be accessible from the Realm MPAM feature page.

• MPAMCFG_DIS_s, MPAMCFG_DIS_ns, MPAMCFG_DIS_rt, and MPAMCFG_DIS_rl must be separate registers:

• The Secure instance (MPAMCFG_DIS_s) accesses the PARTID disable used for Secure PARTIDs.

• The Non-secure instance (MPAMCFG_DIS_ns) accesses the PARTID disable used for Non-secure PARTIDs.

• The Root instance (MPAMCFG_DIS_rt) accesses the PARTID disable used for Root PARTIDs.

• The Realm instance (MPAMCFG_DIS_rl) accesses the PARTID disable used for Realm PARTIDs.

When RIS is implemented, loads and stores to MPAMCFG_DIS access the PARTID disable configuration settings for the PARTID disable 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_DIS access the PARTID disable configuration settings for the PARTID selected by MPAMCFG_PART_SEL.PARTID_SEL.

When PARTID narrowing is implemented, loads and stores to MPAMCFG_DIS access the PARTID disable 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_DIS access the PARTID disable configuration settings for the request PARTID selected by MPAMCFG_PART_SEL.PARTID_SEL, and MPAMCFG_PART_SEL.INTERNAL must be 0.

MPAMCFG_DIS can be accessed through the memory-mapped interfaces:

Accesses to this register are WO/RAZ.

Accesses to this register are WO/RAZ.

When FEAT_RME is implemented, accesses to this register are WO/RAZ.

When FEAT_RME is implemented, accesses to this register are WO/RAZ.

2026-03-12 12:23:09, 2025-09_rel_asl1

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