GICR_ICENABLER<n>E, Interrupt Clear-Enable Registers, n = 1 - 2

The GICR_ICENABLER<n>E characteristics are:

Purpose

Disables forwarding of the corresponding PPI to the CPU interfaces.

Configuration

This register is present only when GICv3.1 is implemented. Otherwise, direct accesses to GICR_ICENABLER<n>E are RES0.

A copy of this register is provided for each Redistributor.

Attributes

GICR_ICENABLER<n>E is a 32-bit register.

Field descriptions

313029282726252423222120191817161514131211109876543210
Clear_enable_bit31Clear_enable_bit30Clear_enable_bit29Clear_enable_bit28Clear_enable_bit27Clear_enable_bit26Clear_enable_bit25Clear_enable_bit24Clear_enable_bit23Clear_enable_bit22Clear_enable_bit21Clear_enable_bit20Clear_enable_bit19Clear_enable_bit18Clear_enable_bit17Clear_enable_bit16Clear_enable_bit15Clear_enable_bit14Clear_enable_bit13Clear_enable_bit12Clear_enable_bit11Clear_enable_bit10Clear_enable_bit9Clear_enable_bit8Clear_enable_bit7Clear_enable_bit6Clear_enable_bit5Clear_enable_bit4Clear_enable_bit3Clear_enable_bit2Clear_enable_bit1Clear_enable_bit0

Clear_enable_bit<x>, bit [x], for x = 31 to 0

For the extended PPI range, controls the forwarding of interrupt number x to the CPU interface. Reads and writes have the following behavior:

Clear_enable_bit<x>Meaning
0b0

If read, indicates that forwarding of the corresponding interrupt is disabled.

If written, has no effect.

0b1

If read, indicates that forwarding of the corresponding interrupt is enabled.

If written, disables forwarding of the corresponding interrupt.

After a write of 1 to this bit, a subsequent read of this bit returns 0.

The reset behavior of this field is:

Additional information

For INTID m, when DIV and MOD are the integer division and modulo operations:

Accessing GICR_ICENABLER<n>E

When affinity routing is not enabled for the Security state of an interrupt in GICR_ICENABLER<n>E, the corresponding bit is RES0.

When GICD_CTLR.DS==0, bits corresponding to Secure PPIs are RAZ/WI to Non-secure accesses.

Bits corresponding to unimplemented interrupts are RAZ/WI.

GICR_ICENABLER<n>E can be accessed through the memory-mapped interfaces:

ComponentFrameOffsetInstance
GIC RedistributorSGI_base0x0180 + (4 * n)GICR_ICENABLER<n>E

Accesses on this interface are RW.


26/03/2024 09:49; 67c0ae5282a7629ba0ea0ba7267b43cd4f7939f6

Copyright © 2010-2024 Arm Limited or its affiliates. All rights reserved. This document is Non-Confidential.