The MPAMCFG_MBW_PBM characteristics are:
The MPAMCFG_MBW_PBM register is a read-write register that configures the cache portions that a PARTID is allowed to allocate. After setting MPAMCFG_PART_SEL with a PARTID, software (usually a hypervisor) writes to the MPAMCFG_CPBM register to configure which cache portions the PARTID is allowed to allocate.
The power domain of MPAMCFG_MBW_PBM is IMPLEMENTATION DEFINED.
This register is present only when MPAMF_IDR.HAS_MBW_PART == 1 and MPAMF_MBW_IDR.HAS_PBM == 1. Otherwise, direct accesses to MPAMCFG_MBW_PBM are IMPLEMENTATION DEFINED.
MPAMCFG_MBW_PBM is a 4096-bit register.
The MPAMCFG_MBW_PBM bit assignments are:
Each bit BWPBM<n> grants permission to the PARTID to allocate bandwidth within bandwidth portion n.
BWPBM<n> | Meaning |
---|---|
0b0 |
The PARTID is not permitted to allocate into bandwidth portion n. |
0b1 |
The PARTID is permitted to allocate within bandwidth portion n. |
The number of bits in the bandwidth portion partitioning bit map of this component is given in MPAMF_MBW_IDR.BWPBM_WD. BWPBM_WD contains a value from 1 to 212, inclusive. Values of BWPBM_WD greater than 32 require a group of 32-bit registers to access the BWPBM, up to 128 32-bit registers.
Bits BWPBM<n>, where n is greater than BWPBM_WD, are not required to be implemented.
This register is part of the MPAMF_BASE memory frame. In a system that supports Secure and Non-secure memory maps, the MPAMF_BASE frame must be accessible in both Secure and Non-secure memory address maps.
MPAMCFG_MBW_PBM must be accessible from the Non-secure and Secure address maps.
MPAMCFG_MBW_PBM must be banked for the Secure and Non-secure address maps. The Secure instance accesses the memory bandwidth portion bitmaps used for Secure PARTIDs, and the Non-secure instance accesses the memory bandwidth portion bitmaps used for Non-secure PARTIDs.
Component | Frame | Offset | Instance |
---|---|---|---|
MPAM.any | MPAMF_BASE_s | 0x2000 | MPAMCFG_MBW_PBM_s |
Access on this interface is RW.
Component | Frame | Offset | Instance |
---|---|---|---|
MPAM.any | MPAMF_BASE_ns | 0x2000 | MPAMCFG_MBW_PBM_ns |
Access on this interface is RW.
13/12/2018 16:42; 6379d01c197f1d40720d32d0f84c419c9187c009
Copyright © 2010-2018 Arm Limited or its affiliates. All rights reserved. This document is Non-Confidential.