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The MSMON_CSU characteristics are:
Accesses the CSU monitor instance selected by MSMON_CFG_MON_SEL. MSMON_CSU_s is a Secure cache storage usage monitor instance selected by the Secure instance of MSMON_CFG_MON_SEL. MSMON_CSU_ns is a 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 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.
The power domain of MSMON_CSU is IMPLEMENTATION DEFINED.
This register is present only when FEAT_MPAM is implemented, MPAMF_IDR.HAS_MSMON == 1 and MPAMF_MSMON_IDR.MSMON_CSU == 1. Otherwise, direct accesses to MSMON_CSU are RES0.
MSMON_CSU is a 32-bit register.
The MSMON_CSU bit assignments are:
31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
NRDY | VALUE |
Not Ready. Indicates whether the monitor instance has possibly inaccurate data.
NRDY | Meaning |
---|---|
0b0 | The monitor instance is ready and the MSMON_CSU.VALUE field is accurate. |
0b1 | The monitor instance is not ready and the contents of the MSMON_CSU.VALUE field might be inaccurate or otherwise not represent the actual cache storage usage. |
Cache storage usage measurement value if MSMON_CSU.NRDY is 0. Invalid if MSMON_CSU.NRDY is 1.
VALUE is the cache storage usage measured 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.
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_s must be accessible from the Secure MPAM feature page. MSMON_CSU_ns must be accessible from the Non-secure MPAM feature page.
MSMON_CSU_s and MSMON_CSU_ns must be separate registers. The Secure instance (MSMON_CSU_s) accesses the cache storage usage monitor used for Secure PARTIDs, and the Non-secure instance (MSMON_CSU_ns) accesses the cache storage usage monitor used for Non-secure PARTIDs.
When RIS is implemented, reads and writes to MSMON_CSU access the cache storage usage monitor 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 access the cache storage usage monitor monitor instance for the cache storage usage monitor instance selected by MSMON_CFG_MON_SEL.MON_SEL.
Component | Frame | Offset | Instance |
---|---|---|---|
MPAM | MPAMF_BASE_s | 0x0840 | MSMON_CSU_s |
This interface is accessible as follows:
Component | Frame | Offset | Instance |
---|---|---|---|
MPAM | MPAMF_BASE_ns | 0x0840 | MSMON_CSU_ns |
This interface is accessible as follows:
3001/0907/2020 15:0757; ccead0cb9f089f9ceec50268e82aec9e7104721180324f0b9997bede489cc15ad1565345720bcd2a
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