MPAMCFG_MBW_PROP MPAM Memory Bandwidth Proportional Stride Partition Configuration Register The power domain of MPAMCFG_MBW_PROP is IMPLEMENTATION DEFINED when (FEAT_MPAMv0p1 is implemented or FEAT_MPAMv1p0 is implemented), MPAMF_IDR.HAS_MBW_PART == '1', and MPAMF_MBW_IDR.HAS_PROP == '1' MPAM MPAMF_BASE_s 0x0500 MPAMCFG_MBW_PROP_s When FEAT_MPAMv1p0 is implemented or FEAT_MPAMv0p1 is implemented RW MPAM MPAMF_BASE_ns 0x0500 MPAMCFG_MBW_PROP_ns When FEAT_MPAMv1p0 is implemented or FEAT_MPAMv0p1 is implemented RW MPAM MPAMF_BASE_rt 0x0500 MPAMCFG_MBW_PROP_rt When FEAT_RME is implemented and (FEAT_MPAMv1p0 is implemented or FEAT_MPAMv0p1 is implemented) RW MPAM MPAMF_BASE_rl 0x0500 MPAMCFG_MBW_PROP_rl When FEAT_RME is implemented and (FEAT_MPAMv1p0 is implemented or FEAT_MPAMv0p1 is implemented) RW Controls the proportional stride of memory bandwidth that the PARTID selected by MPAMCFG_PART_SEL uses. Proportional stride is a relative cost of bandwidth requested by one PARTID in relation to the costs of the bandwidths requested by each other PARTID also competing to use the bandwidth. MPAM If MPAMF_IDR.HAS_RIS is 1, the control settings accessed are those of the resource instance currently selected by MPAMCFG_PART_SEL.RIS and the PARTID selected by MPAMCFG_PART_SEL.PARTID_SEL. If FEAT_MPAMv0p1 or FEAT_MPAMv1p0 is implemented, then the following statements apply: MPAMCFG_MBW_PROP_s controls the bandwidth proportional stride for the Secure PARTID selected by the Secure instance of MPAMCFG_PART_SEL. MPAMCFG_MBW_PROP_ns controls the bandwidth proportional stride for the Non-secure PARTID selected by the Non-secure instance of MPAMCFG_PART_SEL. If FEAT_RME is implemented, then the following statements also apply: MPAMCFG_MBW_PROP_rt controls the bandwidth proportional stride for the Root PARTID selected by the Root instance of MPAMCFG_PART_SEL. MPAMCFG_MBW_PROP_rl controls the bandwidth proportional stride for the Realm PARTID selected by the Realm instance of MPAMCFG_PART_SEL. The power and reset domain of each MSC component is specific to that component. MPAMCFG_MBW_PROP is a 32-bit register. EN 31 31 31 Enable proportional stride bandwidth partitioning. 0b0 The selected partition is not regulated by proportional stride bandwidth partitioning. 0b1 The selected partition has bandwidth usage regulated by proportional stride bandwidth partitioning as controlled by STRIDEM1. 30 16 30:16 Reserved, RES0. STRIDEM1 15 0 15:0 Memory bandwidth stride minus 1 allocated to the partition selected by MPAMCFG_PART_SEL. STRIDEM1 represents the normalized cost of bandwidth consumption by the partition. The proportional stride partitioning control parameter is an unsigned integer representing the normalized cost to a partition for consuming bandwidth. Larger values have a larger cost and correspond to a lesser allocation of bandwidth while smaller values indicate a lesser cost and therefore a higher allocation of bandwidth. The implemented width of STRIDEM1 is given in MPAMF_MBW_IDR.BWA_WD. If both FEAT_MPAM and FEAT_RME are implemented, the following statements apply: In a system that supports Secure, Non-secure, Root, and Realm memory maps, there must be MPAM feature pages in all four address maps: MPAMCFG_MBW_PROP_s must only be accessible from the Secure MPAM feature page. MPAMCFG_MBW_PROP_ns must only be accessible from the Non-secure MPAM feature page. MPAMCFG_MBW_PROP_rt must only be accessible from the Root MPAM feature page. MPAMCFG_MBW_PROP_rl must only be accessible from the Realm MPAM feature page. MPAMCFG_MBW_PROP_s, MPAMCFG_MBW_PROP_ns, MPAMCFG_MBW_PROP_rt, and MPAMCFG_MBW_PROP_rl must be separate registers: The Secure instance (MPAMCFG_MBW_PROP_s) accesses the memory proportional stride bandwidth partitioning used for Secure PARTIDs. The Non-secure instance (MPAMCFG_MBW_PROP_ns) accesses the memory proportional stride bandwidth partitioning used for Non-secure PARTIDs. The Root instance (MPAMCFG_MBW_PROP_rt) accesses the memory proportional stride bandwidth partitioning used for Root PARTIDs. The Realm instance (MPAMCFG_MBW_PROP_rl) accesses the memory proportional stride bandwidth partitioning used for Realm PARTIDs. When RIS is implemented, loads and stores to MPAMCFG_MBW_PROP access the memory proportional stride bandwidth partitioning configuration settings for the bandwidth resource instance selected by MPAMCFG_PART_SEL.RIS and the PARTID selected by MPAMCFG_PART_SEL.PARTID_SEL. When RIS is not implemented, loads and stores to MPAMCFG_MBW_PROP access the memory proportional stride bandwidth partitioning configuration settings for the PARTID selected by MPAMCFG_PART_SEL.PARTID_SEL. When PARTID narrowing is implemented, loads and stores to MPAMCFG_MBW_PROP access the memory proportional stride bandwidth partitioning configuration settings for the internal PARTID selected by MPAMCFG_PART_SEL.PARTID_SEL, and MPAMCFG_PART_SEL.INTERNAL must be 1. When PARTID narrowing is not implemented, loads and stores to MPAMCFG_MBW_PROP access the memory proportional stride bandwidth partitioning configuration settings for the request PARTID selected by MPAMCFG_PART_SEL.PARTID_SEL, and MPAMCFG_PART_SEL.INTERNAL must be 0. 2026-03-26 20:27:25 2026-03_rel