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GITS_PARTIDR, Set PARTID and PMG Register

The GITS_PARTIDR characteristics are:

Purpose

Sets the PARTID and PMG values used for memory accesses by the ITS.

Configuration

This register is present only when GIC, >=3.1 is implemented. Otherwise, direct accesses to GITS_PARTIDR are RES0.

A copy of this register is provided for each ITS.

When GITS_TYPER.MPAM==0, this register is RES0.

Attributes

GITS_PARTIDR is a 32-bit register.

Field descriptions

The GITS_PARTIDR bit assignments are:

313029282726252423222120191817161514131211109876543210
RES0PMGPARTID

Bits [31:24]

Reserved, RES0.

PMG, bits [23:16]

PMG value used when ITS accesses memory.

It is IMPLEMENTATION DEFINED whether bits not needed to represent PMG values in the range 0 to PMG_MAX are stateful or RES0.

PARTID, bits [15:0]

PARTID value used when ITS accesses memory.

It is IMPLEMENTATION DEFINED whether bits not needed to represent PARTID values in the range 0 to PARTID_MAX are stateful or RES0.

Accessing the GITS_PARTIDR

GITS_PARTIDR can be accessed through the memory-mapped interfaces:

ComponentOffset
GIC ITS control0x0014

This interface is accessible as follows:

  • When GICD_CTLR.DS == 0b0 accesses to this register are RW.
  • When IsAccessSecure() accesses to this register are RW.
  • When !IsAccessSecure() accesses to this register are RW.


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