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MSMON_MBWU, MPAM Memory Bandwdith Usage Monitor Register

The MSMON_MBWU characteristics are:

Purpose

MSMON_MBWU is a 32-bit read-write register that accesses the monitor selected by MSMON_CFG_MON_SEL.

Configuration

The power domain of MSMON_MBWU is IMPLEMENTATION DEFINED.

This register is present only when MPAMF_IDR.HAS_MSMON == 1 and MPAMF_MSMON_IDR.MSMON_MBWU == 1. Otherwise, direct accesses to MSMON_MBWU are IMPLEMENTATION DEFINED.

Attributes

MSMON_MBWU is a 32-bit register.

Field descriptions

The MSMON_MBWU bit assignments are:

313029282726252423222120191817161514131211109876543210
NRDYVALUE

NRDY, bit [31]

Not Ready. Indicates whether the monitor has possibly inaccurate data.

NRDYMeaning
0b0

The monitor is not ready and the contents of the VALUE field might be inaccurate or otherwise not represent the actual memory bandwidth usage.

0b1

The monitor is ready and the VALUE fields is accurate.

VALUE, bits [30:0]

Memory bandwidth usage value if NRDY == 0. Invalid if NRDY == 1.

VALUE is the memory bandwidth usage in bytes per second meeting the criteria set in MSMON_CFG_MBWU_FLT and MSMON_CFG_MBWU_CTL for the monitor instance selected by MSMON_CFG_MON_SEL.

Accessing the MSMON_MBWU

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.

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

MSMON_MBWU must be banked for the Secure and Non-secure address maps. The Secure instance accesses the memory bandwidth usage monitor used for Secure PARTIDs, and the Non-secure instance accesses the memory bandwidth usage monitor used for Non-secure PARTIDs.

MSMON_MBWU can be accessed through the memory-mapped interfaces:

ComponentFrameOffsetInstance
MPAM.anyMPAMF_BASE_s0x0860MSMON_MBWU_s

Access on this interface is RW.

ComponentFrameOffsetInstance
MPAM.anyMPAMF_BASE_ns0x0860MSMON_MBWU_ns

Access on this interface is RW.



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