MPAMF_IDR, MPAM Features Identification Register

The MPAMF_IDR characteristics are:

Purpose

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.

When MPAMF_IDR.HAS_RIS is 1, some fields in this register give information for the resource instance selected by MPAMCFG_PART_SEL.RIS. The description of every field that is affected by MPAMCFG_PART_SEL.RIS has that information within the field description.

Configuration

The power domain of MPAMF_IDR is IMPLEMENTATION DEFINED.

This register is present only when FEAT_MPAM is implemented. Otherwise, direct accesses to MPAMF_IDR are RES0.

MAMPF_IDR is 64-bit register when MPAM v0.1 or v1.1 is implemented.

Otherwise, MAMPF_IDR is a 32-bit register.

Attributes

MPAMF_IDR is a:

• 64-bit register when FEAT_MPAMv0p1 is implemented or FEAT_MPAMv1p1 is implemented
• 32-bit register otherwise

Field descriptions

The MPAMF_IDR bit assignments are:

When FEAT_MPAMv0p1 is implemented or FEAT_MPAMv1p1 is implemented:

63	62	61	60	59	58	57	56	55	54	53	52	51	50	49	48	47	46	45	44	43	42	41	40	39	38	37	36	35	34	33	32
RES0				RIS_MAX				RES0																HAS_ESR	HAS_EXTD_ESR	NO_IMPL_MSMON	NO_IMPL_PART	RES0			HAS_RIS
HAS_PARTID_NRW	HAS_MSMON	HAS_IMPL_IDR	EXT	HAS_PRI_PART	HAS_MBW_PART	HAS_CPOR_PART	HAS_CCAP_PART	PMG_MAX								PARTID_MAX

Bits [63:60]

Reserved, RES0.

RIS_MAX, bits [59:56]

When MPAMF_IDR.EXT == 1 and MPAMF_IDR.HAS_RIS == 1:

Maximum RIS value supported in MPAMCFG_PART_SEL. Must be 0b0000 if MPAMF_IDR.HAS_RIS == 0.

Otherwise:

Reserved, RES0.

Bits [55:40]

Reserved, RES0.

HAS_ESR, bit [39]

When MPAMF_IDR.EXT == 1:

MPAMF_ESR is implemented.

Otherwise:

Reserved, RES0.

HAS_EXTD_ESR, bit [38]

When MPAMF_IDR.EXT == 1:

MPAMF_ESR is 64 bits.

When MPAMF_IDR.HAS_RIS and MPAMF_IDR.HAS_ESR, this field must be 1.

Otherwise:

Reserved, RES0.

NO_IMPL_MSMON, bit [37]

When MPAMF_IDR.EXT == 1 and MPAMF_IDR.HAS_IMPL_IDR == 1:

MPAMF_IMPL_IDR defines no IMPLEMENTATION DEFINED resource monitors.

If RIS is implemented, this field indicates the presence of IMPLEMENTATION DEFINED resource monitors described in MPAMF_IMPL_IDR for the selected resource instance.

Otherwise:

Reserved, RES0.

NO_IMPL_PART, bit [36]

When MPAMF_IDR.EXT == 1 and MPAMF_IDR.HAS_IMPL_IDR == 1:

MPAMF_IMPL_IDR defines no IMPLEMENTATION DEFINED resource controls.

If RIS is implemented, this field indicates the presence of IMPLEMENTATION DEFINED resource controls described in MPAMF_IMPL_IDR for the selected resource instance.

Otherwise:

Reserved, RES0.

Bits [35:33]

Reserved, RES0.

HAS_RIS, bit [32]

When MPAMF_IDR.EXT == 1:

Has resource instance selector. Indicates that MPAMCFG_PART_SEL contains the RIS field that selects a resource instance to control.

Otherwise:

Reserved, RES0.

HAS_PARTID_NRW, bit [31]

Has PARTID narrowing.

HAS_MSMON, bit [30]

Has resource monitors. Indicates whether this MSC has MPAM resource monitors.

HAS_IMPL_IDR, bit [29]

Has MPAMF_IMPL_IDR. Indicates whether this MSC has the implementation-specific MPAM features register, MPAMF_IMPL_IDR.

EXT, bit [28]

When FEAT_MPAMv0p1 is implemented or FEAT_MPAMv1p1 is implemented:

Extended MPAMF_IDR.

Otherwise:

Reserved, RES0.

HAS_PRI_PART, bit [27]

Has priority partitioning. Indicates that MPAM priority partitioning is implemented and MPAMF_PRI_IDR exists.

If RIS is implemented, this field indicates the presence of priority partitioning resource controls as described in MPAMF_PRI_IDR for the selected resource instance.

HAS_MBW_PART, bit [26]

Has memory bandwidth partitioning. Indicates whether this MSC implements MPAM memory bandwidth partitioning and MPAMF_MBW_IDR.

If RIS is implemented, this field indicates the presence of memory bandwidth partitioning resource controls as described in MPAMF_MBW_IDR for the selected resource instance.

HAS_CPOR_PART, bit [25]

Has cache portion partitioning. Indicates whether this MSC implements MPAM cache portion partitioning and MPAMF_CPOR_IDR.

If RIS is implemented, this field indicates the presence of cache portion partitioning resource controls as described in MPAMF_CPOR_IDR for the selected resource instance.

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.

If RIS is implemented, this field indicates the presence of cache capacity partitioning resource controls as described in MPAMF_CPOR_IDR for the selected resource instance.

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.

Otherwise:

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	EXT	HAS_PRI_PART	HAS_MBW_PART	HAS_CPOR_PART	HAS_CCAP_PART	PMG_MAX								PARTID_MAX
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, bit [31]

Has PARTID narrowing.

HAS_MSMON, bit [30]

Has resource monitors. Indicates whether this MSC has MPAM resource monitors.

HAS_IMPL_IDR, bit [29]

Has MPAMF_IMPL_IDR. Indicates whether this MSC has the implementation-specific MPAM features register, MPAMF_IMPL_IDR.

EXT, bit [28]

When FEAT_MPAMv0p1 is implemented or FEAT_MPAMv1p1 is implemented:

Extended MPAMF_IDR.

Otherwise:

Reserved, RES0.

HAS_PRI_PART, bit [27]

Has priority partitioning. Indicates whether this MSC implements MPAM priority partitioning and 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_CPOR_PART, bit [25]

Has cache portion partitioning. Indicates whether this MSC implements MPAM cache portion partitioning and MPAMF_CPOR_IDR.

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.

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.

When MPAMF_IDR.HAS_RIS is 1, MPAMF_IDR shows the configuration of MSC MPAM for the resource instance selected by MPAMCFG_PART_SEL.RIS. Fields that mention RIS in their field descriptions have values that track the implemented properties of the resource instance. Fields that do not mention RIS are constant across all resource instances.

MPAMF_IDR can be accessed through the memory-mapped interfaces:

Accesses on this interface are RO.

Accesses on this interface are RO.