MSMON_CFG_CSU_CTL, MPAM Memory System Monitor Configure Cache Storage Usage Monitor Control Register

The MSMON_CFG_CSU_CTL characteristics are:

Purpose

Controls the CSU monitor selected by MSMON_CFG_MON_SEL. MSMON_CFG_CSU_CTL_s controls the Secure cache storage usage monitor instance selected by the Secure instance of MSMON_CFG_MON_SEL. MSMON_CFG_CSU_CTL_ns controls Non-secure cache storage usage monitor instance selected by the Non-secure instance of MSMON_CFG_MON_SEL.

If MPAMF_IDR.HAS_RIS is 1, the monitor instance configuration 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_CFG_CSU_CTL is IMPLEMENTATION DEFINED.

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

Attributes

MSMON_CFG_CSU_CTL is a 32-bit register.

Field descriptions

The MSMON_CFG_CSU_CTL bit assignments are:

EN, bit [31]

Enabled.

CAPT_EVNT, bits [30:28]

Capture event selector.

Select the event that triggers capture from the following:

The values marked as optional indicate capture event sources that can be omitted in an implementation. Those values representing non-implemented event sources must not trigger a capture event.

If capture is not implemented for the CSU monitor type as indicated by MPAMF_CSUMON_IDR.HAS_CAPTURE = 0, this field is RAZ/WI.

CAPT_RESET, bit [27]

Reset after capture.

Controls whether the value of MSMON_CSU is reset to zero immediately after being copied to MSMON_CSU_CAPTURE.

If capture is not implemented for the CSU monitor type as indicated by MPAMF_CSUMON_IDR.HAS_CAPTURE = 0, this field is RAZ/WI.

Because the CSU monitor type produces a measurement rather than a count, it might not make sense to ever reset the value after a capture. If there is no reason to ever reset a CSU monitor, this field is RAZ/WI.

OFLOW_STATUS, bit [26]

Overflow status.

Indicates whether the value of MSMON_CSU has overflowed.

If overflow is not possible for a CSU monitor in the implementation, this field is RAZ/WI.

OFLOW_INTR, bit [25]

Overflow Interrupt.

Controls whether an overflow interrupt is generated when the value of MSMON_CSU has overflowed.

If OFLOW_INTR is not supported by the implementation, this field is RAZ/WI.

OFLOW_FRZ, bit [24]

Freeze Monitor on Overflow.

Controls whether the value of MSMON_CSU freezes on an overflow.

If overflow is not possible for a CSU monitor in the implementation, this field is RAZ/WI.

SUBTYPE, bits [23:20]

Subtype. Type of bandwidth counted by this monitor.

This field is not currently used for CSU monitors, but reserved for future use.

This field is RAZ/WI.

Bits [19:18]

Reserved, RES0.

MATCH_PMG, bit [17]

Match PMG.

Controls whether the monitor measures only storage used with PMG matching MSMON_CFG_CSU_FLT.PMG.

If MATCH_PMG == 1 and MATCH_PARTID == 0, it is CONSTRAINED UNPREDICTABLE whether the monitor instance:

• Measures the storage used with matching PMG and with any PARTID.
• Measures no storage usage, that is, MSMON_CSU.VALUE is zero.
• Measures the storage used with matching PMG and PARTID, that is, treats MATCH_PARTID as == 1.

MATCH_PARTID, bit [16]

Match PARTID.

Controls whether the monitor measures only storage used with PARTID matching MSMON_CFG_CSU_FLT.PARTID.

Bits [15:8]

Reserved, RES0.

TYPE, bits [7:0]

Monitor Type Code. The CSU monitor is TYPE = 0x43.

TYPE is a read-only constant indicating the type of the monitor.

Reads as 0x43.

Accessing the MSMON_CFG_CSU_CTL

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_CFG_CSU_CTL_s must be accessible from the Secure MPAM feature page. MSMON_CFG_CSU_CTL_ns must be accessible from the Non-secure MPAM feature page.

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

When RIS is implemented, loads and stores to MSMON_CFG_CSU_CTL access the cache storage usage monitor configuration settings 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, loads and stores to MSMON_CFG_CSU_CTL access the cache storage usage monitor configuration settings for the cache storage usage monitor instance selected by MSMON_CFG_MON_SEL.MON_SEL.

MSMON_CFG_CSU_CTL can be accessed through the memory-mapped interfaces:

Accesses on this interface are RW.

Accesses on this interface are RW.