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.

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

313029282726252423222120191817161514131211109876543210
EN31EN30EN29EN28EN27EN26EN25EN24EN23EN22EN21EN20EN19EN18EN17EN16EN15EN14EN13EN12EN11EN10EN9EN8EN7EN6EN5EN4EN3EN2EN1EN0

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

PARTID Enable flags. The group of flags accessed is selected by MPAMCFG_PART_SEL.PARTID & 0x0000001F in bit [0] to MPAMCFG_PART_SEL.PARTID | 0x0000001F 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 & 0x0000001F) + 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 and Non-secure memory maps, there must be both Secure and Non-secure MPAM feature pages.

MPAMCFG_EN_FLAGS_s must be accessible from the Secure MPAM feature page. MPAMCFG_EN_FLAGS_ns must be accessible from the Non-secure MPAM feature page.

MPAMCFG_EN_FLAGS_s and MPAMCFG_EN_FLAGS_ns must be separate registers. The Secure instance (MPAMCFG_EN_FLAGS_s) accesses the PARTID enable used for Secure PARTIDs, and the Non-secure instance (MPAMCFG_EN_FLAGS_ns) accesses the PARTID enable used for Non-secure 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:

ComponentFrameOffsetInstance
MPAMMPAMF_BASE_s0x0320MPAMCFG_EN_FLAGS_s

Accesses on this interface are RW.

ComponentFrameOffsetInstance
MPAMMPAMF_BASE_ns0x0320MPAMCFG_EN_FLAGS_ns

Accesses on this interface are RW.


30/09/2021 15:34; 092b4e1bbfbb45a293b198f9330c5f529ead2b0f

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