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MSMON_CSU_CAPTURE, MPAM Cache Storage Usage Monitor Capture Register

The MSMON_CSU_CAPTURE characteristics are:

Purpose

MSMON_CSU_CAPTURE is a 32-bit read-write register that accesses the captured MSMON_CSU monitor instance selected by MSMON_CFG_MON_SEL. MSMON_CSU_CAPTURE_s is the Secure cache storage usage monitor capture instance selected by the Secure instance of MSMON_CFG_MON_SEL. MSMON_CSU_CAPTURE_ns is the Non-secure cache storage usage monitor capture instance selected by the Non-secure instance of MSMON_CFG_MON_SEL.

If MPAMF_IDR.HAS_RIS is 1, the monitor instance capture register accessed is for the resource instance currently selected by MSMON_CFG_MON_SEL.RIS and the monitor instance of that resource instance selected by MSMON_CFG_MON_SEL.MON_SEL.

Configuration

The power domain of MSMON_CSU_CAPTURE is IMPLEMENTATION DEFINED.

This register is present only when MPAMF_IDR.HAS_MSMON == 1, MPAMF_MSMON_IDR.MSMON_CSU == 1 and MPAMF_CSUMON_IDR.HAS_CAPTURE == 1. Otherwise, direct accesses to MSMON_CSU_CAPTURE are RES0.

Attributes

MSMON_CSU_CAPTURE is a 32-bit register.

Field descriptions

The MSMON_CSU_CAPTURE bit assignments are:

313029282726252423222120191817161514131211109876543210
NRDYVALUE

NRDY, bit [31]

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

NRDYMeaning
0b0

The captured monitor instance was ready and the MSMON_CSU_CAPTURE.VALUE field is accurate.

0b1

The captured monitor instance was not ready and the contents of the MSMON_CSU_CAPTURE.VALUE field might be inaccurate or otherwise not represent the actual cache storage usage.

VALUE, bits [30:0]

Captured cache storage usage measurement if MSMON_CSU_CAPTURE.NRDY is 0. Invalid if MSMON_CSU_CAPTURE.NRDY is 1.

VALUE is the captured cache storage usage measurement in bytes meeting the criteria set in MSMON_CFG_CSU_FLT and MSMON_CFG_CSU_CTL for the monitor instance selected by MSMON_CFG_MON_SEL.

Accessing the MSMON_CSU_CAPTURE

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.

MSMON_CSU_CAPTURE_s must be accessible from the Secure MPAM feature page. MSMON_CSU_CAPTURE_ns must be accessible from the Non-secure MPAM feature page.

MSMON_CSU_CAPTURE_s and MSMON_CSU_CAPTURE_ns must be separate registers. The Secure instance (MSMON_CSU_CAPTURE_s) accesses the captured cache storage usage monitor used for Secure PARTIDs, and the Non-secure instance (MSMON_CSU_CAPTURE_ns) accesses the captured cache storage usage monitor used for Non-secure PARTIDs.

When RIS is implemented, reads and writes to MSMON_CSU_CAPTURE access the monitor instance for the cache resource instance selected by MSMON_CFG_MON_SEL.RIS and the cache storage usage monitor instance selected by MSMON_CFG_MON_SEL.MON_SEL.

When RIS is not implemented, reads and writes to MSMON_CSU_CAPTURE access the monitor instance for the cache storage usage monitor instance selected by MSMON_CFG_MON_SEL.MON_SEL.

MSMON_CSU_CAPTURE can be accessed through the memory-mapped interfaces:

ComponentFrameOffsetInstance
MPAMMPAMF_BASE_s0x0848MSMON_CSU_CAPTURE_s

Accesses on this interface are RW.

ComponentFrameOffsetInstance
MPAMMPAMF_BASE_ns0x0848MSMON_CSU_CAPTURE_ns

Accesses on this interface are RW.