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:
NRDY, bit [31]
Not Ready. Indicates whether the captured monitor value has possibly inaccurate data.
NRDY | Meaning |
---|---|
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:
Component | Frame | Offset | Instance |
---|---|---|---|
MPAM | MPAMF_BASE_s | 0x0848 | MSMON_CSU_CAPTURE_s |
Accesses on this interface are RW.
Component | Frame | Offset | Instance |
---|---|---|---|
MPAM | MPAMF_BASE_ns | 0x0848 | MSMON_CSU_CAPTURE_ns |
Accesses on this interface are RW.