1 # SPDX-License-Identifier: GPL-2.0 1 # SPDX-License-Identifier: GPL-2.0
2 %YAML 1.2 2 %YAML 1.2
3 --- 3 ---
4 $id: http://devicetree.org/schemas/interrupt-c 4 $id: http://devicetree.org/schemas/interrupt-controller/arm,gic-v3.yaml#
5 $schema: http://devicetree.org/meta-schemas/co 5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6 6
7 title: ARM Generic Interrupt Controller, versi 7 title: ARM Generic Interrupt Controller, version 3
8 8
9 maintainers: 9 maintainers:
10 - Marc Zyngier <maz@kernel.org> !! 10 - Marc Zyngier <marc.zyngier@arm.com>
11 11
12 description: | 12 description: |
13 AArch64 SMP cores are often associated with 13 AArch64 SMP cores are often associated with a GICv3, providing Private
14 Peripheral Interrupts (PPI), Shared Peripher 14 Peripheral Interrupts (PPI), Shared Peripheral Interrupts (SPI),
15 Software Generated Interrupts (SGI), and Loc 15 Software Generated Interrupts (SGI), and Locality-specific Peripheral
16 Interrupts (LPI). 16 Interrupts (LPI).
17 17
18 allOf: 18 allOf:
19 - $ref: /schemas/interrupt-controller.yaml# 19 - $ref: /schemas/interrupt-controller.yaml#
20 20
21 properties: 21 properties:
22 compatible: 22 compatible:
23 oneOf: 23 oneOf:
24 - items: 24 - items:
25 - enum: 25 - enum:
26 - qcom,msm8996-gic-v3 26 - qcom,msm8996-gic-v3
27 - const: arm,gic-v3 27 - const: arm,gic-v3
28 - const: arm,gic-v3 28 - const: arm,gic-v3
29 29
30 interrupt-controller: true 30 interrupt-controller: true
31 31
32 "#address-cells": 32 "#address-cells":
33 enum: [ 0, 1, 2 ] 33 enum: [ 0, 1, 2 ]
34 "#size-cells": 34 "#size-cells":
35 enum: [ 1, 2 ] 35 enum: [ 1, 2 ]
36 36
37 ranges: true 37 ranges: true
38 38
39 "#interrupt-cells": 39 "#interrupt-cells":
40 description: | 40 description: |
41 Specifies the number of cells needed to 41 Specifies the number of cells needed to encode an interrupt source.
42 Must be a single cell with a value of at 42 Must be a single cell with a value of at least 3.
43 If the system requires describing PPI af 43 If the system requires describing PPI affinity, then the value must
44 be at least 4. 44 be at least 4.
45 45
46 The 1st cell is the interrupt type; 0 fo 46 The 1st cell is the interrupt type; 0 for SPI interrupts, 1 for PPI
47 interrupts, 2 for interrupts in the Exte 47 interrupts, 2 for interrupts in the Extended SPI range, 3 for the
48 Extended PPI range. Other values are res 48 Extended PPI range. Other values are reserved for future use.
49 49
50 The 2nd cell contains the interrupt numb 50 The 2nd cell contains the interrupt number for the interrupt type.
51 SPI interrupts are in the range [0-987]. 51 SPI interrupts are in the range [0-987]. PPI interrupts are in the
52 range [0-15]. Extended SPI interrupts ar !! 52 range [0-15]. Extented SPI interrupts are in the range [0-1023].
53 Extended PPI interrupts are in the range 53 Extended PPI interrupts are in the range [0-127].
54 54
55 The 3rd cell is the flags, encoded as fo 55 The 3rd cell is the flags, encoded as follows:
56 bits[3:0] trigger type and level flags. 56 bits[3:0] trigger type and level flags.
57 1 = edge triggered 57 1 = edge triggered
58 4 = level triggered 58 4 = level triggered
59 59
60 The 4th cell is a phandle to a node desc 60 The 4th cell is a phandle to a node describing a set of CPUs this
61 interrupt is affine to. The interrupt mu 61 interrupt is affine to. The interrupt must be a PPI, and the node
62 pointed must be a subnode of the "ppi-pa 62 pointed must be a subnode of the "ppi-partitions" subnode. For
63 interrupt types other than PPI or PPIs t !! 63 interrupt types other than PPI or PPIs that are not partitionned,
64 this cell must be zero. See the "ppi-par 64 this cell must be zero. See the "ppi-partitions" node description
65 below. 65 below.
66 66
67 Cells 5 and beyond are reserved for futu 67 Cells 5 and beyond are reserved for future use and must have a value
68 of 0 if present. 68 of 0 if present.
69 enum: [ 3, 4 ] 69 enum: [ 3, 4 ]
70 70
71 reg: 71 reg:
72 description: | 72 description: |
73 Specifies base physical address(s) and s 73 Specifies base physical address(s) and size of the GIC
74 registers, in the following order: 74 registers, in the following order:
75 - GIC Distributor interface (GICD) 75 - GIC Distributor interface (GICD)
76 - GIC Redistributors (GICR), one range p 76 - GIC Redistributors (GICR), one range per redistributor region
77 - GIC CPU interface (GICC) 77 - GIC CPU interface (GICC)
78 - GIC Hypervisor interface (GICH) 78 - GIC Hypervisor interface (GICH)
79 - GIC Virtual CPU interface (GICV) 79 - GIC Virtual CPU interface (GICV)
80 80
81 GICC, GICH and GICV are optional, but mu !! 81 GICC, GICH and GICV are optional.
82 support them. Examples of such CPUs are <<
83 ARMv8.0 architecture such as Cortex-A32, <<
84 A73 (this list is not exhaustive). <<
85 <<
86 minItems: 2 82 minItems: 2
87 maxItems: 4096 # Should be enough? 83 maxItems: 4096 # Should be enough?
88 84
89 interrupts: 85 interrupts:
90 description: 86 description:
91 Interrupt source of the VGIC maintenance 87 Interrupt source of the VGIC maintenance interrupt.
92 maxItems: 1 88 maxItems: 1
93 89
94 redistributor-stride: 90 redistributor-stride:
95 description: 91 description:
96 If using padding pages, specifies the st 92 If using padding pages, specifies the stride of consecutive
97 redistributors. Must be a multiple of 64 93 redistributors. Must be a multiple of 64kB.
98 $ref: /schemas/types.yaml#/definitions/uin 94 $ref: /schemas/types.yaml#/definitions/uint64
99 multipleOf: 0x10000 95 multipleOf: 0x10000
100 exclusiveMinimum: 0 96 exclusiveMinimum: 0
101 97
102 "#redistributor-regions": 98 "#redistributor-regions":
103 description: 99 description:
104 The number of independent contiguous reg 100 The number of independent contiguous regions occupied by the
105 redistributors. Required if more than on 101 redistributors. Required if more than one such region is present.
106 $ref: /schemas/types.yaml#/definitions/uin 102 $ref: /schemas/types.yaml#/definitions/uint32
107 maximum: 4096 103 maximum: 4096
108 104
109 dma-noncoherent: <<
110 description: <<
111 Present if the GIC redistributors permit <<
112 and cacheability attributes but are conn <<
113 downstream interconnect. <<
114 <<
115 msi-controller: 105 msi-controller:
116 description: 106 description:
117 Only present if the Message Based Interr !! 107 Only present if the Message Based Interrupt functionnality is
118 being exposed by the HW, and the mbi-ran 108 being exposed by the HW, and the mbi-ranges property present.
119 109
120 mbi-ranges: 110 mbi-ranges:
121 description: 111 description:
122 A list of pairs <intid span>, where "int 112 A list of pairs <intid span>, where "intid" is the first SPI of a range
123 that can be used an MBI, and "span" the 113 that can be used an MBI, and "span" the size of that range. Multiple
124 ranges can be provided. 114 ranges can be provided.
125 $ref: /schemas/types.yaml#/definitions/uin 115 $ref: /schemas/types.yaml#/definitions/uint32-matrix
126 items: 116 items:
127 minItems: 2 117 minItems: 2
128 maxItems: 2 118 maxItems: 2
129 119
130 mbi-alias: 120 mbi-alias:
131 description: 121 description:
132 Address property. Base address of an ali 122 Address property. Base address of an alias of the GICD region containing
133 only the {SET,CLR}SPI registers to be us 123 only the {SET,CLR}SPI registers to be used if isolation is required,
134 and if supported by the HW. 124 and if supported by the HW.
135 $ref: /schemas/types.yaml#/definitions/uin 125 $ref: /schemas/types.yaml#/definitions/uint32-array
136 items: 126 items:
137 minItems: 1 127 minItems: 1
138 maxItems: 2 128 maxItems: 2
139 129
140 ppi-partitions: 130 ppi-partitions:
141 type: object 131 type: object
142 additionalProperties: false <<
143 description: 132 description:
144 PPI affinity can be expressed as a singl 133 PPI affinity can be expressed as a single "ppi-partitions" node,
145 containing a set of sub-nodes. 134 containing a set of sub-nodes.
146 patternProperties: 135 patternProperties:
147 "^interrupt-partition-[0-9]+$": 136 "^interrupt-partition-[0-9]+$":
148 type: object 137 type: object
149 additionalProperties: false <<
150 properties: 138 properties:
151 affinity: 139 affinity:
152 $ref: /schemas/types.yaml#/definit 140 $ref: /schemas/types.yaml#/definitions/phandle-array
153 items: <<
154 maxItems: 1 <<
155 description: 141 description:
156 Should be a list of phandles to 142 Should be a list of phandles to CPU nodes (as described in
157 Documentation/devicetree/binding 143 Documentation/devicetree/bindings/arm/cpus.yaml).
158 144
159 required: 145 required:
160 - affinity 146 - affinity
161 147
162 clocks: 148 clocks:
163 maxItems: 1 149 maxItems: 1
164 150
165 clock-names: 151 clock-names:
166 items: 152 items:
167 - const: aclk 153 - const: aclk
168 154
169 power-domains: 155 power-domains:
170 maxItems: 1 156 maxItems: 1
171 157
172 resets: 158 resets:
173 maxItems: 1 159 maxItems: 1
174 160
175 mediatek,broken-save-restore-fw: <<
176 type: boolean <<
177 description: <<
178 Asserts that the firmware on this device <<
179 GICR registers when the GIC redistributo <<
180 <<
181 dependencies: 161 dependencies:
182 mbi-ranges: [ msi-controller ] 162 mbi-ranges: [ msi-controller ]
183 msi-controller: [ mbi-ranges ] 163 msi-controller: [ mbi-ranges ]
184 164
185 required: 165 required:
186 - compatible 166 - compatible
>> 167 - interrupts
187 - reg 168 - reg
188 169
189 patternProperties: 170 patternProperties:
190 "^gic-its@": false 171 "^gic-its@": false
191 "^interrupt-controller@[0-9a-f]+$": false 172 "^interrupt-controller@[0-9a-f]+$": false
192 # msi-controller is preferred, but allow oth 173 # msi-controller is preferred, but allow other names
193 "^(msi-controller|gic-its|interrupt-controll 174 "^(msi-controller|gic-its|interrupt-controller)@[0-9a-f]+$":
194 type: object 175 type: object
195 description: 176 description:
196 GICv3 has one or more Interrupt Translat 177 GICv3 has one or more Interrupt Translation Services (ITS) that are
197 used to route Message Signalled Interrup 178 used to route Message Signalled Interrupts (MSI) to the CPUs.
198 properties: 179 properties:
199 compatible: 180 compatible:
200 const: arm,gic-v3-its 181 const: arm,gic-v3-its
201 182
202 dma-noncoherent: <<
203 description: <<
204 Present if the GIC ITS permits progr <<
205 cacheability attributes but is conne <<
206 downstream interconnect. <<
207 <<
208 msi-controller: true 183 msi-controller: true
209 184
210 "#msi-cells": 185 "#msi-cells":
211 description: 186 description:
212 The single msi-cell is the DeviceID 187 The single msi-cell is the DeviceID of the device which will generate
213 the MSI. 188 the MSI.
214 const: 1 189 const: 1
215 190
216 reg: 191 reg:
217 description: 192 description:
218 Specifies the base physical address 193 Specifies the base physical address and size of the ITS registers.
219 maxItems: 1 194 maxItems: 1
220 195
221 socionext,synquacer-pre-its: 196 socionext,synquacer-pre-its:
222 description: 197 description:
223 (u32, u32) tuple describing the untr 198 (u32, u32) tuple describing the untranslated
224 address and size of the pre-ITS wind 199 address and size of the pre-ITS window.
225 $ref: /schemas/types.yaml#/definitions 200 $ref: /schemas/types.yaml#/definitions/uint32-array
226 items: 201 items:
227 minItems: 2 202 minItems: 2
228 maxItems: 2 203 maxItems: 2
229 204
230 required: 205 required:
231 - compatible 206 - compatible
232 - msi-controller 207 - msi-controller
233 - "#msi-cells" 208 - "#msi-cells"
234 - reg 209 - reg
235 210
236 additionalProperties: false 211 additionalProperties: false
237 212
238 additionalProperties: false 213 additionalProperties: false
239 214
240 examples: 215 examples:
241 - | 216 - |
242 gic: interrupt-controller@2cf00000 { 217 gic: interrupt-controller@2cf00000 {
243 compatible = "arm,gic-v3"; 218 compatible = "arm,gic-v3";
244 #interrupt-cells = <3>; 219 #interrupt-cells = <3>;
245 #address-cells = <1>; 220 #address-cells = <1>;
246 #size-cells = <1>; 221 #size-cells = <1>;
247 ranges; 222 ranges;
248 interrupt-controller; 223 interrupt-controller;
249 reg = <0x2f000000 0x10000>, // GICD 224 reg = <0x2f000000 0x10000>, // GICD
250 <0x2f100000 0x200000>, // GICR 225 <0x2f100000 0x200000>, // GICR
251 <0x2c000000 0x2000>, // GICC 226 <0x2c000000 0x2000>, // GICC
252 <0x2c010000 0x2000>, // GICH 227 <0x2c010000 0x2000>, // GICH
253 <0x2c020000 0x2000>; // GICV 228 <0x2c020000 0x2000>; // GICV
254 interrupts = <1 9 4>; 229 interrupts = <1 9 4>;
255 230
256 msi-controller; 231 msi-controller;
257 mbi-ranges = <256 128>; 232 mbi-ranges = <256 128>;
258 233
259 msi-controller@2c200000 { 234 msi-controller@2c200000 {
260 compatible = "arm,gic-v3-its"; 235 compatible = "arm,gic-v3-its";
261 msi-controller; 236 msi-controller;
262 #msi-cells = <1>; 237 #msi-cells = <1>;
263 reg = <0x2c200000 0x20000>; 238 reg = <0x2c200000 0x20000>;
264 }; 239 };
265 }; 240 };
266 241
267 - | <<
268 interrupt-controller@2c010000 { 242 interrupt-controller@2c010000 {
269 compatible = "arm,gic-v3"; 243 compatible = "arm,gic-v3";
270 #interrupt-cells = <4>; 244 #interrupt-cells = <4>;
271 #address-cells = <1>; 245 #address-cells = <1>;
272 #size-cells = <1>; 246 #size-cells = <1>;
273 ranges; 247 ranges;
274 interrupt-controller; 248 interrupt-controller;
275 redistributor-stride = <0x0 0x40000>; / 249 redistributor-stride = <0x0 0x40000>; // 256kB stride
276 #redistributor-regions = <2>; 250 #redistributor-regions = <2>;
277 reg = <0x2c010000 0x10000>, // GICD 251 reg = <0x2c010000 0x10000>, // GICD
278 <0x2d000000 0x800000>, // GICR 1: 252 <0x2d000000 0x800000>, // GICR 1: CPUs 0-31
279 <0x2e000000 0x800000>, // GICR 2: 253 <0x2e000000 0x800000>, // GICR 2: CPUs 32-63
280 <0x2c040000 0x2000>, // GICC 254 <0x2c040000 0x2000>, // GICC
281 <0x2c060000 0x2000>, // GICH 255 <0x2c060000 0x2000>, // GICH
282 <0x2c080000 0x2000>; // GICV 256 <0x2c080000 0x2000>; // GICV
283 interrupts = <1 9 4 0>; !! 257 interrupts = <1 9 4>;
284 258
285 msi-controller@2c200000 { 259 msi-controller@2c200000 {
286 compatible = "arm,gic-v3-its"; 260 compatible = "arm,gic-v3-its";
287 msi-controller; 261 msi-controller;
288 #msi-cells = <1>; 262 #msi-cells = <1>;
289 reg = <0x2c200000 0x20000>; 263 reg = <0x2c200000 0x20000>;
290 }; 264 };
291 265
292 msi-controller@2c400000 { 266 msi-controller@2c400000 {
293 compatible = "arm,gic-v3-its"; 267 compatible = "arm,gic-v3-its";
294 msi-controller; 268 msi-controller;
295 #msi-cells = <1>; 269 #msi-cells = <1>;
296 reg = <0x2c400000 0x20000>; 270 reg = <0x2c400000 0x20000>;
297 }; 271 };
298 272
299 ppi-partitions { 273 ppi-partitions {
300 part0: interrupt-partition-0 { 274 part0: interrupt-partition-0 {
301 affinity = <&cpu0>, <&cpu2>; !! 275 affinity = <&cpu0 &cpu2>;
302 }; 276 };
303 277
304 part1: interrupt-partition-1 { 278 part1: interrupt-partition-1 {
305 affinity = <&cpu1>, <&cpu3>; !! 279 affinity = <&cpu1 &cpu3>;
306 }; 280 };
307 }; 281 };
308 }; 282 };
309 283
310 284
311 device@0 { 285 device@0 {
312 reg = <0 4>; 286 reg = <0 4>;
313 interrupts = <1 1 4 &part0>; 287 interrupts = <1 1 4 &part0>;
314 }; 288 };
315 289
316 ... 290 ...
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