MPAMCFG_PRI MPAM Priority Partition Configuration Register The power domain of MPAMCFG_PRI is IMPLEMENTATION DEFINED when (FEAT_MPAMv0p1 is implemented or FEAT_MPAMv1p0 is implemented) and MPAMF_IDR.HAS_PRI_PART == '1' MPAM MPAMF_BASE_s 0x0400 MPAMCFG_PRI_s When FEAT_MPAMv1p0 is implemented or FEAT_MPAMv0p1 is implemented RW MPAM MPAMF_BASE_ns 0x0400 MPAMCFG_PRI_ns When FEAT_MPAMv1p0 is implemented or FEAT_MPAMv0p1 is implemented RW MPAM MPAMF_BASE_rt 0x0400 MPAMCFG_PRI_rt When FEAT_RME is implemented and (FEAT_MPAMv1p0 is implemented or FEAT_MPAMv0p1 is implemented) RW MPAM MPAMF_BASE_rl 0x0400 MPAMCFG_PRI_rl When FEAT_RME is implemented and (FEAT_MPAMv1p0 is implemented or FEAT_MPAMv0p1 is implemented) RW Controls the internal and downstream priority of requests attributed to the PARTID selected by MPAMCFG_PART_SEL. 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_MPAMv1p0 or FEAT_MPAMv0p1 is implemented, then the following statements apply: MPAMCFG_PRI_s controls the priorities for the Secure PARTID selected by the Secure instance of MPAMCFG_PART_SEL. MPAMCFG_PRI_ns controls the priorities 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_PRI_rt controls the priorities for the Root PARTID selected by the Root instance of MPAMCFG_PART_SEL. MPAMCFG_PRI_rl controls the priorities 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_PRI is a 32-bit register. DSPRI 31 16 31:16 Downstream priority. If MPAMF_PRI_IDR.HAS_DSPRI == 0, bits of this field are RES0 as this field is not used. If MPAMF_PRI_IDR.HAS_DSPRI == 1, this field is a priority value applied to downstream communications from this MSC for transactions of the partition selected by MPAMCFG_PART_SEL. The implemented width of this field is MPAMF_PRI_IDR.DSPRI_WD bits. If the implemented width is less than the width of this field, the least significant bits are used. The encoding of priority is 0-as-lowest or 0-as-highest priority according to the value of MPAMF_PRI_IDR.DSPRI_0_IS_LOW. INTPRI 15 0 15:0 Internal priority. If MPAMF_PRI_IDR.HAS_INTPRI == 0, bits of this field are RES0 as this field is not used. If MPAMF_PRI_IDR.HAS_INTPRI == 1, this field is a priority value applied internally inside this MSC for transactions of the partition selected by MPAMCFG_PART_SEL. The implemented width of this field is MPAMF_PRI_IDR.INTPRI_WD bits. If the implemented width is less than the width of this field, the least significant bits are used. The encoding of priority is 0-as-lowest or 0-as-highest priority according to the value of MPAMF_PRI_IDR.INTPRI_0_IS_LOW. 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_PRI_s must only be accessible from the Secure MPAM feature page. MPAMCFG_PRI_ns must only be accessible from the Non-secure MPAM feature page. MPAMCFG_PRI_rt must only be accessible from the Root MPAM feature page. MPAMCFG_PRI_rl must only be accessible from the Realm MPAM feature page. MPAMCFG_PRI_s, MPAMCFG_PRI_ns, MPAMCFG_PRI_rt, and MPAMCFG_PRI_rl must be separate registers: The Secure instance (MPAMCFG_PRI_s) accesses the priority partitioning used for Secure PARTIDs. The Non-secure instance (MPAMCFG_PRI_ns) accesses the priority partitioning used for Non-secure PARTIDs. The Root instance (MPAMCFG_PRI_rt) accesses the priority partitioning used for Root PARTIDs. The Realm instance (MPAMCFG_PRI_rl) accesses the priority partitioning used for Realm PARTIDs. When RIS is implemented, loads and stores to MPAMCFG_PRI access the priority partitioning configuration settings for the priority 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_PRI access the priority partitioning configuration settings for the PARTID selected by MPAMCFG_PART_SEL.PARTID_SEL. When PARTID narrowing is implemented, loads and stores to MPAMCFG_PRI access the priority 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_PRI access the priority 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