1# SPDX-License-Identifier: GPL-2.0
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/interrupt-controller/arm,gic-v3.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: ARM Generic Interrupt Controller, version 3
8
9maintainers:
10  - Marc Zyngier <maz@kernel.org>
11
12description: |
13  AArch64 SMP cores are often associated with a GICv3, providing Private
14  Peripheral Interrupts (PPI), Shared Peripheral Interrupts (SPI),
15  Software Generated Interrupts (SGI), and Locality-specific Peripheral
16  Interrupts (LPI).
17
18allOf:
19  - $ref: /schemas/interrupt-controller.yaml#
20
21properties:
22  compatible:
23    oneOf:
24      - items:
25          - enum:
26              - qcom,msm8996-gic-v3
27          - const: arm,gic-v3
28      - const: arm,gic-v3
29
30  interrupt-controller: true
31
32  "#address-cells":
33    enum: [ 0, 1, 2 ]
34  "#size-cells":
35    enum: [ 1, 2 ]
36
37  ranges: true
38
39  "#interrupt-cells":
40    description: |
41      Specifies the number of cells needed to encode an interrupt source.
42      Must be a single cell with a value of at least 3.
43      If the system requires describing PPI affinity, then the value must
44      be at least 4.
45
46      The 1st cell is the interrupt type; 0 for SPI interrupts, 1 for PPI
47      interrupts, 2 for interrupts in the Extended SPI range, 3 for the
48      Extended PPI range. Other values are reserved for future use.
49
50      The 2nd cell contains the interrupt number for the interrupt type.
51      SPI interrupts are in the range [0-987]. PPI interrupts are in the
52      range [0-15]. Extented SPI interrupts are in the range [0-1023].
53      Extended PPI interrupts are in the range [0-127].
54
55      The 3rd cell is the flags, encoded as follows:
56      bits[3:0] trigger type and level flags.
57        1 = edge triggered
58        4 = level triggered
59
60      The 4th cell is a phandle to a node describing a set of CPUs this
61      interrupt is affine to. The interrupt must be a PPI, and the node
62      pointed must be a subnode of the "ppi-partitions" subnode. For
63      interrupt types other than PPI or PPIs that are not partitionned,
64      this cell must be zero. See the "ppi-partitions" node description
65      below.
66
67      Cells 5 and beyond are reserved for future use and must have a value
68      of 0 if present.
69    enum: [ 3, 4 ]
70
71  reg:
72    description: |
73      Specifies base physical address(s) and size of the GIC
74      registers, in the following order:
75      - GIC Distributor interface (GICD)
76      - GIC Redistributors (GICR), one range per redistributor region
77      - GIC CPU interface (GICC)
78      - GIC Hypervisor interface (GICH)
79      - GIC Virtual CPU interface (GICV)
80
81      GICC, GICH and GICV are optional, but must be described if the CPUs
82      support them. Examples of such CPUs are ARM's implementations of the
83      ARMv8.0 architecture such as Cortex-A32, A34, A35, A53, A57, A72 and
84      A73 (this list is not exhaustive).
85
86    minItems: 2
87    maxItems: 4096   # Should be enough?
88
89  interrupts:
90    description:
91      Interrupt source of the VGIC maintenance interrupt.
92    maxItems: 1
93
94  redistributor-stride:
95    description:
96      If using padding pages, specifies the stride of consecutive
97      redistributors. Must be a multiple of 64kB.
98    $ref: /schemas/types.yaml#/definitions/uint64
99    multipleOf: 0x10000
100    exclusiveMinimum: 0
101
102  "#redistributor-regions":
103    description:
104      The number of independent contiguous regions occupied by the
105      redistributors. Required if more than one such region is present.
106    $ref: /schemas/types.yaml#/definitions/uint32
107    maximum: 4096
108
109  msi-controller:
110    description:
111      Only present if the Message Based Interrupt functionnality is
112      being exposed by the HW, and the mbi-ranges property present.
113
114  mbi-ranges:
115    description:
116      A list of pairs <intid span>, where "intid" is the first SPI of a range
117      that can be used an MBI, and "span" the size of that range. Multiple
118      ranges can be provided.
119    $ref: /schemas/types.yaml#/definitions/uint32-matrix
120    items:
121      minItems: 2
122      maxItems: 2
123
124  mbi-alias:
125    description:
126      Address property. Base address of an alias of the GICD region containing
127      only the {SET,CLR}SPI registers to be used if isolation is required,
128      and if supported by the HW.
129    $ref: /schemas/types.yaml#/definitions/uint32-array
130    items:
131      minItems: 1
132      maxItems: 2
133
134  ppi-partitions:
135    type: object
136    description:
137      PPI affinity can be expressed as a single "ppi-partitions" node,
138      containing a set of sub-nodes.
139    patternProperties:
140      "^interrupt-partition-[0-9]+$":
141        type: object
142        properties:
143          affinity:
144            $ref: /schemas/types.yaml#/definitions/phandle-array
145            items:
146              maxItems: 1
147            description:
148              Should be a list of phandles to CPU nodes (as described in
149              Documentation/devicetree/bindings/arm/cpus.yaml).
150
151        required:
152          - affinity
153
154  clocks:
155    maxItems: 1
156
157  clock-names:
158    items:
159      - const: aclk
160
161  power-domains:
162    maxItems: 1
163
164  resets:
165    maxItems: 1
166
167dependencies:
168  mbi-ranges: [ msi-controller ]
169  msi-controller: [ mbi-ranges ]
170
171required:
172  - compatible
173  - interrupts
174  - reg
175
176patternProperties:
177  "^gic-its@": false
178  "^interrupt-controller@[0-9a-f]+$": false
179  # msi-controller is preferred, but allow other names
180  "^(msi-controller|gic-its|interrupt-controller)@[0-9a-f]+$":
181    type: object
182    description:
183      GICv3 has one or more Interrupt Translation Services (ITS) that are
184      used to route Message Signalled Interrupts (MSI) to the CPUs.
185    properties:
186      compatible:
187        const: arm,gic-v3-its
188
189      msi-controller: true
190
191      "#msi-cells":
192        description:
193          The single msi-cell is the DeviceID of the device which will generate
194          the MSI.
195        const: 1
196
197      reg:
198        description:
199          Specifies the base physical address and size of the ITS registers.
200        maxItems: 1
201
202      socionext,synquacer-pre-its:
203        description:
204          (u32, u32) tuple describing the untranslated
205          address and size of the pre-ITS window.
206        $ref: /schemas/types.yaml#/definitions/uint32-array
207        items:
208          minItems: 2
209          maxItems: 2
210
211    required:
212      - compatible
213      - msi-controller
214      - "#msi-cells"
215      - reg
216
217    additionalProperties: false
218
219additionalProperties: false
220
221examples:
222  - |
223    gic: interrupt-controller@2cf00000 {
224      compatible = "arm,gic-v3";
225      #interrupt-cells = <3>;
226      #address-cells = <1>;
227      #size-cells = <1>;
228      ranges;
229      interrupt-controller;
230      reg = <0x2f000000 0x10000>,  // GICD
231            <0x2f100000 0x200000>,  // GICR
232            <0x2c000000 0x2000>,  // GICC
233            <0x2c010000 0x2000>,  // GICH
234            <0x2c020000 0x2000>;  // GICV
235      interrupts = <1 9 4>;
236
237      msi-controller;
238      mbi-ranges = <256 128>;
239
240      msi-controller@2c200000 {
241        compatible = "arm,gic-v3-its";
242        msi-controller;
243        #msi-cells = <1>;
244        reg = <0x2c200000 0x20000>;
245      };
246    };
247
248  - |
249    interrupt-controller@2c010000 {
250      compatible = "arm,gic-v3";
251      #interrupt-cells = <4>;
252      #address-cells = <1>;
253      #size-cells = <1>;
254      ranges;
255      interrupt-controller;
256      redistributor-stride = <0x0 0x40000>;  // 256kB stride
257      #redistributor-regions = <2>;
258      reg = <0x2c010000 0x10000>,  // GICD
259            <0x2d000000 0x800000>,  // GICR 1: CPUs 0-31
260            <0x2e000000 0x800000>,  // GICR 2: CPUs 32-63
261            <0x2c040000 0x2000>,  // GICC
262            <0x2c060000 0x2000>,  // GICH
263            <0x2c080000 0x2000>;  // GICV
264      interrupts = <1 9 4 0>;
265
266      msi-controller@2c200000 {
267        compatible = "arm,gic-v3-its";
268        msi-controller;
269        #msi-cells = <1>;
270        reg = <0x2c200000 0x20000>;
271      };
272
273      msi-controller@2c400000 {
274        compatible = "arm,gic-v3-its";
275        msi-controller;
276        #msi-cells = <1>;
277        reg = <0x2c400000 0x20000>;
278      };
279
280      ppi-partitions {
281        part0: interrupt-partition-0 {
282          affinity = <&cpu0>, <&cpu2>;
283        };
284
285        part1: interrupt-partition-1 {
286          affinity = <&cpu1>, <&cpu3>;
287        };
288      };
289    };
290
291
292    device@0 {
293      reg = <0 4>;
294      interrupts = <1 1 4 &part0>;
295    };
296
297...
298