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MPAMCFG_MBW_WINWD, MPAM Memory Bandwidth Partitioning Window Width Configuration Register

The MPAMCFG_MBW_WINWD characteristics are:

Purpose

MPAMCFG_MBW_WINWD is a 32-bit register that shows (and sets) the value of the window width for the PARTID in MPAMCFG_PART_SEL.

MPAMCFG_MBW_WINWD is read-only if Mext-PAMF_MBW_IDR.WINDWR == 0, and the window width is set by the hardware, even if variable.

MPAMCFG_MBW_WINWD is read-write if MPAMF_MBW_IDR.WINDWR == 1, permitting configuration of the window width for each PARTID independently on hardware that supports this functionality.

Configuration

The power domain of MPAMCFG_MBW_WINWD is IMPLEMENTATION DEFINED.

This register is present only when MPAMF_IDR.HAS_MBW_PART == 1. Otherwise, direct accesses to MPAMCFG_MBW_WINWD are IMPLEMENTATION DEFINED.

Attributes

MPAMCFG_MBW_WINWD is a 32-bit register.

Field descriptions

The MPAMCFG_MBW_WINWD bit assignments are:

313029282726252423222120191817161514131211109876543210
RES0US_INTUS_FRAC

Bits [31:24]

Reserved, RES0.

US_INT, bits [23:8]

Window width, integer microseconds.

This field reads (and sets) the integer part of the window width in microseconds for the PARTID selected by MPAMCFG_PART_SEL.

US_FRAC, bits [7:0]

Window width, fractional microseconds.

This field reads (and sets) the fractional part of the window width in microseconds for the PARTID selected by MPAMCFG_PART_SEL.

Accessing the MPAMCFG_MBW_WINWD

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_WINWD must be accessible from the Non-secure and Secure address maps.

MPAMCFG_MBW_WINWD must be banked for the Secure and Non-secure address maps. The Secure instance accesses the window width used for Secure PARTIDs, and the Non-secure instance accesses the window width used for Non-secure PARTIDs.

MPAMCFG_MBW_WINWD can be accessed through the memory-mapped interfaces:

ComponentFrameOffsetInstance
MPAM.anyMPAMF_BASE_s0x0220MPAMCFG_MBW_WINWD_s

This interface is accessible as follows:

  • When MPAMF_MBW_IDR.WINWR == 0 access to this register is RO.
  • Otherwise access to this register is RW.
ComponentFrameOffsetInstance
MPAM.anyMPAMF_BASE_ns0x0220MPAMCFG_MBW_WINWD_ns

This interface is accessible as follows:

  • When MPAMF_MBW_IDR.WINWR == 0 access to this register is RO.
  • Otherwise access to this register is RW.


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