MPAMF_IDR, MPAM Features Identification Register
The MPAMF_IDR characteristics are:
Purpose
The MPAMF_IDR is a 32-bit read-only register that indicates which memory partitioning and monitoring features are present on this MSC. MPAMF_IDR_s indicates the MPAM features accessed from the Secure MPAM feature page. MPAMF_IDR_ns indicates the MPAM features accessed from the Non-secure MPAM feature page.
Configuration
The power domain of MPAMF_IDR is IMPLEMENTATION DEFINED.
Attributes
MPAMF_IDR is a 32-bit register.
Field descriptions
The MPAMF_IDR 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 |
| HAS_PARTID_NRW | HAS_MSMON | HAS_IMPL_IDR | RES0 | HAS_PRI_PART | HAS_MBW_PART | HAS_CPOR_PART | HAS_CCAP_PART | PMG_MAX | PARTID_MAX | ||||||||||||||||||||||
HAS_PARTID_NRW, bit [31]
Has PARTID narrowing.
| HAS_PARTID_NRW | Meaning |
|---|---|
| 0b0 |
Does not have MPAMF_PARTID_NRW_IDR, MPAMCFG_INTPARTID or intPARTID mapping support. |
| 0b1 |
Supports the MPAMF_PARTID_NRW_IDR, MPAMCFG_INTPARTID registers. |
HAS_MSMON, bit [30]
Has resource monitors. Indicates whether this MSC has MPAM resource monitors.
| HAS_MSMON | Meaning |
|---|---|
| 0b0 |
Does not support MPAM resource monitoring by groups or MPAMF_MSMON_IDR. |
| 0b1 |
Supports resource monitoring by matching a combination of PARTID and PMG. See MPAMF_MSMON_IDR. |
HAS_IMPL_IDR, bit [29]
Has MPAMF_IMPL_IDR. Indicates whether this MSC has the implementation-specific MPAM features register, MPAMF_IMPL_IDR.
| HAS_IMPL_IDR | Meaning |
|---|---|
| 0b0 |
Does not have MPAMF_IMPL_IDR. |
| 0b1 |
Has MPAMF_IMPL_IDR. |
Bit [28]
Reserved, RES0.
HAS_PRI_PART, bit [27]
Has priority partitioning. Indicates whether this MSC implements MPAM priority partitioning and MPAMF_PRI_IDR.
| HAS_PRI_PART | Meaning |
|---|---|
| 0b0 |
Does not support priority partitioning or have MPAMF_PRI_IDR. |
| 0b1 |
Has MPAMF_PRI_IDR. |
HAS_MBW_PART, bit [26]
Has memory bandwidth partitioning. Indicates whether this MSC implements MPAM memory bandwidth partitioning and MPAMF_MBW_IDR.
| HAS_MBW_PART | Meaning |
|---|---|
| 0b0 |
Does not support memory bandwidth partitioning or have MPAMF_MBW_IDR register. |
| 0b1 |
Has MPAMF_MBW_IDR register. |
HAS_CPOR_PART, bit [25]
Has cache portion partitioning. Indicates whether this MSC implements MPAM cache portion partitioning and MPAMF_CPOR_IDR.
| HAS_CPOR_PART | Meaning |
|---|---|
| 0b0 |
Does not support cache portion partitioning or have MPAMF_CPOR_IDR or MPAMCFG_CPBM registers. |
| 0b1 |
Has MPAMF_CPOR_IDR and MPAMCFG_CPBM registers. |
HAS_CCAP_PART, bit [24]
Has cache capacity partitioning. Indicates whether this MSC implements MPAM cache capacity partitioning and the MPAMF_CCAP_IDR and MPAMCFG_CMAX registers.
| HAS_CCAP_PART | Meaning |
|---|---|
| 0b0 |
Does not support cache capacity partitioning or have MPAMF_CCAP_IDR and MPAMCFG_CMAX registers. |
| 0b1 |
Has MPAMF_CCAP_IDR and MPAMCFG_CMAX registers. |
PMG_MAX, bits [23:16]
Maximum value of Non-secure PMG supported by this component.
PARTID_MAX, bits [15:0]
Maximum value of Non-secure PARTID supported by this component.
Accessing the MPAMF_IDR
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.
MPAMF_IDR is read-only.
MPAMF_IDR must be readable from the Non-secure and Secure MPAM feature pages.
MPAMF_IDR is permitted to have the same contents when read from either the Secure and Non-secure MPAM feature pages unless the register contents is different for Secure and Non-secure versions, when there must be separate registers in the Secure (MPAMF_IDR_s) and Non-secure (MPAMF_IDR_ns) MPAM feature pages.
MPAMF_IDR can be accessed through the memory-mapped interfaces:
| Component | Frame | Offset | Instance |
|---|---|---|---|
| MPAM | MPAMF_BASE_s | 0x0000 | MPAMF_IDR_s |
Accesses on this interface are RO.
| Component | Frame | Offset | Instance |
|---|---|---|---|
| MPAM | MPAMF_BASE_ns | 0x0000 | MPAMF_IDR_ns |
Accesses on this interface are RO.