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# GICD_ICFGR<n>E, Interrupt Configuration Registers (Extended SPI Range), n = 0 - 63

The GICD_ICFGR<n>E characteristics are:

## Purpose

Determines whether the corresponding SPI in the extended SPI range is edge-triggered or level-sensitive.

## Configuration

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

When GICD_TYPER.ESPI==0, these registers are RES0.

When GICD_TYPER.ESPI==1, the number of implemented GICD_ICFGR<n>E registers is ((GICD_TYPER.ESPI_range+1)*2). Registers are numbered from 0.

## Attributes

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

## Field descriptions

31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0
Int_config15 | Int_config14 | Int_config13 | Int_config12 | Int_config11 | Int_config10 | Int_config9 | Int_config8 | Int_config7 | Int_config6 | Int_config5 | Int_config4 | Int_config3 | Int_config2 | Int_config1 | Int_config0

#### Int_config<x>, bits [2x+1:2x], for x = 15 to 0

Indicates whether the interrupt is level-sensitive or edge-triggered.

Int_config[0] (bit[2x]) is RES0.

Int_config<x> | Meaning
--- | ---
0b00 | Corresponding interrupt is level-sensitive.
0b10 | Corresponding interrupt is edge-triggered.

The reset behavior of this field is:

- On a GIC reset, this field resets to an architecturally UNKNOWN value.

## Accessing GICD_ICFGR<n>E

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

When GICD_CTLR.DS==0, a register bit that corresponds to a Group 0 or Secure Group 1 interrupt is RAZ/WI to Non-secure accesses.

Bits corresponding to unimplemented interrupts are RAZ/WI.

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

Component | Frame | Offset | Instance
--- | --- | --- | ---
GIC Distributor | Dist_base | 0x3000 + (4 * n) | GICD_ICFGR<n>E

Accesses on this interface are RW.

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26/03/2024 09:49; 67c0ae5282a7629ba0ea0ba7267b43cd4f7939f6

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