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# SPDX-License-Identifier: GPL-2.0
%YAML 1.2
---
$id: http://devicetree.org/schemas/interrupt-controller/arm,gic-v3.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: ARM Generic Interrupt Controller, version 3
maintainers:
- Marc Zyngier <marc.zyngier@arm.com>
description: |
AArch64 SMP cores are often associated with a GICv3, providing Private
Peripheral Interrupts (PPI), Shared Peripheral Interrupts (SPI),
Software Generated Interrupts (SGI), and Locality-specific Peripheral
Interrupts (LPI).
allOf:
- $ref: /schemas/interrupt-controller.yaml#
properties:
compatible:
oneOf:
- items:
- enum:
- qcom,msm8996-gic-v3
- const: arm,gic-v3
- const: arm,gic-v3
interrupt-controller: true
"#address-cells":
enum: [ 0, 1, 2 ]
"#size-cells":
enum: [ 1, 2 ]
ranges: true
"#interrupt-cells":
description: |
Specifies the number of cells needed to encode an interrupt source.
Must be a single cell with a value of at least 3.
If the system requires describing PPI affinity, then the value must
be at least 4.
The 1st cell is the interrupt type; 0 for SPI interrupts, 1 for PPI
interrupts, 2 for interrupts in the Extended SPI range, 3 for the
Extended PPI range. Other values are reserved for future use.
The 2nd cell contains the interrupt number for the interrupt type.
SPI interrupts are in the range [0-987]. PPI interrupts are in the
range [0-15]. Extented SPI interrupts are in the range [0-1023].
Extended PPI interrupts are in the range [0-127].
The 3rd cell is the flags, encoded as follows:
bits[3:0] trigger type and level flags.
1 = edge triggered
4 = level triggered
The 4th cell is a phandle to a node describing a set of CPUs this
interrupt is affine to. The interrupt must be a PPI, and the node
pointed must be a subnode of the "ppi-partitions" subnode. For
interrupt types other than PPI or PPIs that are not partitionned,
this cell must be zero. See the "ppi-partitions" node description
below.
Cells 5 and beyond are reserved for future use and must have a value
of 0 if present.
enum: [ 3, 4 ]
reg:
description: |
Specifies base physical address(s) and size of the GIC
registers, in the following order:
- GIC Distributor interface (GICD)
- GIC Redistributors (GICR), one range per redistributor region
- GIC CPU interface (GICC)
- GIC Hypervisor interface (GICH)
- GIC Virtual CPU interface (GICV)
GICC, GICH and GICV are optional.
minItems: 2
maxItems: 4096 # Should be enough?
interrupts:
description:
Interrupt source of the VGIC maintenance interrupt.
maxItems: 1
redistributor-stride:
description:
If using padding pages, specifies the stride of consecutive
redistributors. Must be a multiple of 64kB.
$ref: /schemas/types.yaml#/definitions/uint64
multipleOf: 0x10000
exclusiveMinimum: 0
"#redistributor-regions":
description:
The number of independent contiguous regions occupied by the
redistributors. Required if more than one such region is present.
$ref: /schemas/types.yaml#/definitions/uint32
maximum: 4096
msi-controller:
description:
Only present if the Message Based Interrupt functionnality is
being exposed by the HW, and the mbi-ranges property present.
mbi-ranges:
description:
A list of pairs <intid span>, where "intid" is the first SPI of a range
that can be used an MBI, and "span" the size of that range. Multiple
ranges can be provided.
$ref: /schemas/types.yaml#/definitions/uint32-matrix
items:
minItems: 2
maxItems: 2
mbi-alias:
description:
Address property. Base address of an alias of the GICD region containing
only the {SET,CLR}SPI registers to be used if isolation is required,
and if supported by the HW.
$ref: /schemas/types.yaml#/definitions/uint32-array
items:
minItems: 1
maxItems: 2
ppi-partitions:
type: object
description:
PPI affinity can be expressed as a single "ppi-partitions" node,
containing a set of sub-nodes.
patternProperties:
"^interrupt-partition-[0-9]+$":
type: object
properties:
affinity:
$ref: /schemas/types.yaml#/definitions/phandle-array
description:
Should be a list of phandles to CPU nodes (as described in
Documentation/devicetree/bindings/arm/cpus.yaml).
required:
- affinity
dependencies:
mbi-ranges: [ msi-controller ]
msi-controller: [ mbi-ranges ]
required:
- compatible
- interrupts
- reg
patternProperties:
"^gic-its@": false
"^interrupt-controller@[0-9a-f]+$": false
# msi-controller is preferred, but allow other names
"^(msi-controller|gic-its|interrupt-controller)@[0-9a-f]+$":
type: object
description:
GICv3 has one or more Interrupt Translation Services (ITS) that are
used to route Message Signalled Interrupts (MSI) to the CPUs.
properties:
compatible:
const: arm,gic-v3-its
msi-controller: true
"#msi-cells":
description:
The single msi-cell is the DeviceID of the device which will generate
the MSI.
const: 1
reg:
description:
Specifies the base physical address and size of the ITS registers.
maxItems: 1
socionext,synquacer-pre-its:
description:
(u32, u32) tuple describing the untranslated
address and size of the pre-ITS window.
$ref: /schemas/types.yaml#/definitions/uint32-array
items:
minItems: 2
maxItems: 2
required:
- compatible
- msi-controller
- "#msi-cells"
- reg
additionalProperties: false
additionalProperties: false
examples:
- |
gic: interrupt-controller@2cf00000 {
compatible = "arm,gic-v3";
#interrupt-cells = <3>;
#address-cells = <1>;
#size-cells = <1>;
ranges;
interrupt-controller;
reg = <0x2f000000 0x10000>, // GICD
<0x2f100000 0x200000>, // GICR
<0x2c000000 0x2000>, // GICC
<0x2c010000 0x2000>, // GICH
<0x2c020000 0x2000>; // GICV
interrupts = <1 9 4>;
msi-controller;
mbi-ranges = <256 128>;
msi-controller@2c200000 {
compatible = "arm,gic-v3-its";
msi-controller;
#msi-cells = <1>;
reg = <0x2c200000 0x20000>;
};
};
interrupt-controller@2c010000 {
compatible = "arm,gic-v3";
#interrupt-cells = <4>;
#address-cells = <1>;
#size-cells = <1>;
ranges;
interrupt-controller;
redistributor-stride = <0x0 0x40000>; // 256kB stride
#redistributor-regions = <2>;
reg = <0x2c010000 0x10000>, // GICD
<0x2d000000 0x800000>, // GICR 1: CPUs 0-31
<0x2e000000 0x800000>, // GICR 2: CPUs 32-63
<0x2c040000 0x2000>, // GICC
<0x2c060000 0x2000>, // GICH
<0x2c080000 0x2000>; // GICV
interrupts = <1 9 4>;
msi-controller@2c200000 {
compatible = "arm,gic-v3-its";
msi-controller;
#msi-cells = <1>;
reg = <0x2c200000 0x20000>;
};
msi-controller@2c400000 {
compatible = "arm,gic-v3-its";
msi-controller;
#msi-cells = <1>;
reg = <0x2c400000 0x20000>;
};
ppi-partitions {
part0: interrupt-partition-0 {
affinity = <&cpu0 &cpu2>;
};
part1: interrupt-partition-1 {
affinity = <&cpu1 &cpu3>;
};
};
};
device@0 {
reg = <0 4>;
interrupts = <1 1 4 &part0>;
};
...
|
