571 lines
15 KiB
YAML
571 lines
15 KiB
YAML
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# SPDX-License-Identifier: GPL-2.0
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/arm/cpus.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: ARM CPUs
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maintainers:
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- Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
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description: |+
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The device tree allows to describe the layout of CPUs in a system through
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the "cpus" node, which in turn contains a number of subnodes (ie "cpu")
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defining properties for every cpu.
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Bindings for CPU nodes follow the Devicetree Specification, available from:
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https://www.devicetree.org/specifications/
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with updates for 32-bit and 64-bit ARM systems provided in this document.
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================================
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Convention used in this document
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================================
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This document follows the conventions described in the Devicetree
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Specification, with the addition:
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- square brackets define bitfields, eg reg[7:0] value of the bitfield in
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the reg property contained in bits 7 down to 0
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=====================================
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cpus and cpu node bindings definition
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=====================================
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The ARM architecture, in accordance with the Devicetree Specification,
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requires the cpus and cpu nodes to be present and contain the properties
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described below.
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properties:
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reg:
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maxItems: 1
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description: |
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Usage and definition depend on ARM architecture version and
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configuration:
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On uniprocessor ARM architectures previous to v7
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this property is required and must be set to 0.
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On ARM 11 MPcore based systems this property is
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required and matches the CPUID[11:0] register bits.
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Bits [11:0] in the reg cell must be set to
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bits [11:0] in CPU ID register.
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All other bits in the reg cell must be set to 0.
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On 32-bit ARM v7 or later systems this property is
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required and matches the CPU MPIDR[23:0] register
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bits.
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Bits [23:0] in the reg cell must be set to
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bits [23:0] in MPIDR.
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All other bits in the reg cell must be set to 0.
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On ARM v8 64-bit systems this property is required
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and matches the MPIDR_EL1 register affinity bits.
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* If cpus node's #address-cells property is set to 2
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The first reg cell bits [7:0] must be set to
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bits [39:32] of MPIDR_EL1.
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The second reg cell bits [23:0] must be set to
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bits [23:0] of MPIDR_EL1.
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* If cpus node's #address-cells property is set to 1
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The reg cell bits [23:0] must be set to bits [23:0]
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of MPIDR_EL1.
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All other bits in the reg cells must be set to 0.
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compatible:
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enum:
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- apple,icestorm
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- apple,firestorm
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- arm,arm710t
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- arm,arm720t
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- arm,arm740t
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- arm,arm7ej-s
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- arm,arm7tdmi
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- arm,arm7tdmi-s
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- arm,arm9es
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- arm,arm9ej-s
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- arm,arm920t
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- arm,arm922t
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- arm,arm925
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- arm,arm926e-s
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- arm,arm926ej-s
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- arm,arm940t
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- arm,arm946e-s
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- arm,arm966e-s
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- arm,arm968e-s
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- arm,arm9tdmi
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- arm,arm1020e
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- arm,arm1020t
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- arm,arm1022e
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- arm,arm1026ej-s
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- arm,arm1136j-s
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- arm,arm1136jf-s
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- arm,arm1156t2-s
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- arm,arm1156t2f-s
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- arm,arm1176jzf
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- arm,arm1176jz-s
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- arm,arm1176jzf-s
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- arm,arm11mpcore
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- arm,armv8 # Only for s/w models
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- arm,cortex-a5
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- arm,cortex-a7
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- arm,cortex-a8
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- arm,cortex-a9
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- arm,cortex-a12
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- arm,cortex-a15
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- arm,cortex-a17
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- arm,cortex-a32
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- arm,cortex-a34
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- arm,cortex-a35
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- arm,cortex-a53
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- arm,cortex-a55
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- arm,cortex-a57
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- arm,cortex-a65
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- arm,cortex-a72
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- arm,cortex-a73
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- arm,cortex-a75
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- arm,cortex-a76
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- arm,cortex-a77
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- arm,cortex-a78
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- arm,cortex-a78ae
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- arm,cortex-a510
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- arm,cortex-a710
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- arm,cortex-a715
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- arm,cortex-m0
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- arm,cortex-m0+
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- arm,cortex-m1
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- arm,cortex-m3
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- arm,cortex-m4
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- arm,cortex-r4
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- arm,cortex-r5
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- arm,cortex-r7
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- arm,cortex-x1
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- arm,cortex-x2
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- arm,cortex-x3
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- arm,neoverse-e1
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- arm,neoverse-n1
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- arm,neoverse-n2
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- arm,neoverse-v1
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- brcm,brahma-b15
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- brcm,brahma-b53
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- brcm,vulcan
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- cavium,thunder
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- cavium,thunder2
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- faraday,fa526
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- intel,sa110
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- intel,sa1100
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- marvell,feroceon
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- marvell,mohawk
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- marvell,pj4a
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- marvell,pj4b
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- marvell,sheeva-v5
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- marvell,sheeva-v7
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- nvidia,tegra132-denver
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- nvidia,tegra186-denver
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- nvidia,tegra194-carmel
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- qcom,krait
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- qcom,kryo
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- qcom,kryo240
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- qcom,kryo250
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- qcom,kryo260
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- qcom,kryo280
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- qcom,kryo360
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- qcom,kryo385
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- qcom,kryo468
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- qcom,kryo485
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- qcom,kryo560
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- qcom,kryo570
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- qcom,kryo660
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- qcom,kryo685
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- qcom,kryo780
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- qcom,scorpion
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enable-method:
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$ref: '/schemas/types.yaml#/definitions/string'
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oneOf:
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# On ARM v8 64-bit this property is required
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- enum:
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- psci
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- spin-table
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# On ARM 32-bit systems this property is optional
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- enum:
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- actions,s500-smp
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- allwinner,sun6i-a31
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- allwinner,sun8i-a23
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- allwinner,sun9i-a80-smp
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- allwinner,sun8i-a83t-smp
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- amlogic,meson8-smp
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- amlogic,meson8b-smp
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- arm,realview-smp
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- aspeed,ast2600-smp
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- brcm,bcm11351-cpu-method
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- brcm,bcm23550
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- brcm,bcm2836-smp
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- brcm,bcm63138
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- brcm,bcm-nsp-smp
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- brcm,brahma-b15
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- marvell,armada-375-smp
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- marvell,armada-380-smp
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- marvell,armada-390-smp
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- marvell,armada-xp-smp
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- marvell,98dx3236-smp
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- marvell,mmp3-smp
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- mediatek,mt6589-smp
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- mediatek,mt81xx-tz-smp
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- qcom,gcc-msm8660
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- qcom,kpss-acc-v1
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- qcom,kpss-acc-v2
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- qcom,msm8226-smp
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- qcom,msm8909-smp
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# Only valid on ARM 32-bit, see above for ARM v8 64-bit
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- qcom,msm8916-smp
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- renesas,apmu
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- renesas,r9a06g032-smp
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- rockchip,rk3036-smp
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- rockchip,rk3066-smp
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- socionext,milbeaut-m10v-smp
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- ste,dbx500-smp
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- ti,am3352
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- ti,am4372
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cpu-release-addr:
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oneOf:
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- $ref: '/schemas/types.yaml#/definitions/uint32'
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- $ref: '/schemas/types.yaml#/definitions/uint64'
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description:
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The DT specification defines this as 64-bit always, but some 32-bit Arm
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systems have used a 32-bit value which must be supported.
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Required for systems that have an "enable-method"
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property value of "spin-table".
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cpu-idle-states:
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$ref: '/schemas/types.yaml#/definitions/phandle-array'
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items:
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maxItems: 1
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description: |
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List of phandles to idle state nodes supported
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by this cpu (see ./idle-states.yaml).
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capacity-dmips-mhz:
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description:
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u32 value representing CPU capacity (see ../cpu/cpu-capacity.txt) in
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DMIPS/MHz, relative to highest capacity-dmips-mhz
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in the system.
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cci-control-port: true
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dynamic-power-coefficient:
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$ref: '/schemas/types.yaml#/definitions/uint32'
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description:
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A u32 value that represents the running time dynamic
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power coefficient in units of uW/MHz/V^2. The
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coefficient can either be calculated from power
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measurements or derived by analysis.
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The dynamic power consumption of the CPU is
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proportional to the square of the Voltage (V) and
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the clock frequency (f). The coefficient is used to
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calculate the dynamic power as below -
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Pdyn = dynamic-power-coefficient * V^2 * f
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where voltage is in V, frequency is in MHz.
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performance-domains:
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maxItems: 1
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description:
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List of phandles and performance domain specifiers, as defined by
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bindings of the performance domain provider. See also
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dvfs/performance-domain.yaml.
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power-domains:
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description:
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List of phandles and PM domain specifiers, as defined by bindings of the
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PM domain provider (see also ../power_domain.txt).
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power-domain-names:
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description:
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A list of power domain name strings sorted in the same order as the
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power-domains property.
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For PSCI based platforms, the name corresponding to the index of the PSCI
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PM domain provider, must be "psci".
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qcom,saw:
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$ref: '/schemas/types.yaml#/definitions/phandle'
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description: |
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Specifies the SAW* node associated with this CPU.
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Required for systems that have an "enable-method" property
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value of "qcom,kpss-acc-v1" or "qcom,kpss-acc-v2"
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* arm/msm/qcom,saw2.txt
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qcom,acc:
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$ref: '/schemas/types.yaml#/definitions/phandle'
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description: |
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Specifies the ACC* node associated with this CPU.
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Required for systems that have an "enable-method" property
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value of "qcom,kpss-acc-v1", "qcom,kpss-acc-v2", "qcom,msm8226-smp" or
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"qcom,msm8916-smp".
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* arm/msm/qcom,kpss-acc.txt
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rockchip,pmu:
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$ref: '/schemas/types.yaml#/definitions/phandle'
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description: |
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Specifies the syscon node controlling the cpu core power domains.
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Optional for systems that have an "enable-method"
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property value of "rockchip,rk3066-smp"
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While optional, it is the preferred way to get access to
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the cpu-core power-domains.
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secondary-boot-reg:
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$ref: '/schemas/types.yaml#/definitions/uint32'
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description: |
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Required for systems that have an "enable-method" property value of
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"brcm,bcm11351-cpu-method", "brcm,bcm23550" or "brcm,bcm-nsp-smp".
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This includes the following SoCs: |
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BCM11130, BCM11140, BCM11351, BCM28145, BCM28155, BCM21664, BCM23550
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BCM58522, BCM58525, BCM58535, BCM58622, BCM58623, BCM58625, BCM88312
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The secondary-boot-reg property is a u32 value that specifies the
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physical address of the register used to request the ROM holding pen
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code release a secondary CPU. The value written to the register is
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formed by encoding the target CPU id into the low bits of the
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physical start address it should jump to.
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if:
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# If the enable-method property contains one of those values
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properties:
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enable-method:
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contains:
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enum:
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- brcm,bcm11351-cpu-method
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- brcm,bcm23550
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- brcm,bcm-nsp-smp
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# and if enable-method is present
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required:
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- enable-method
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then:
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required:
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- secondary-boot-reg
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required:
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- device_type
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- reg
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- compatible
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dependencies:
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rockchip,pmu: [enable-method]
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additionalProperties: true
|
||
|
|
|
||
|
|
examples:
|
||
|
|
- |
|
||
|
|
cpus {
|
||
|
|
#size-cells = <0>;
|
||
|
|
#address-cells = <1>;
|
||
|
|
|
||
|
|
cpu@0 {
|
||
|
|
device_type = "cpu";
|
||
|
|
compatible = "arm,cortex-a15";
|
||
|
|
reg = <0x0>;
|
||
|
|
};
|
||
|
|
|
||
|
|
cpu@1 {
|
||
|
|
device_type = "cpu";
|
||
|
|
compatible = "arm,cortex-a15";
|
||
|
|
reg = <0x1>;
|
||
|
|
};
|
||
|
|
|
||
|
|
cpu@100 {
|
||
|
|
device_type = "cpu";
|
||
|
|
compatible = "arm,cortex-a7";
|
||
|
|
reg = <0x100>;
|
||
|
|
};
|
||
|
|
|
||
|
|
cpu@101 {
|
||
|
|
device_type = "cpu";
|
||
|
|
compatible = "arm,cortex-a7";
|
||
|
|
reg = <0x101>;
|
||
|
|
};
|
||
|
|
};
|
||
|
|
|
||
|
|
- |
|
||
|
|
// Example 2 (Cortex-A8 uniprocessor 32-bit system):
|
||
|
|
cpus {
|
||
|
|
#size-cells = <0>;
|
||
|
|
#address-cells = <1>;
|
||
|
|
|
||
|
|
cpu@0 {
|
||
|
|
device_type = "cpu";
|
||
|
|
compatible = "arm,cortex-a8";
|
||
|
|
reg = <0x0>;
|
||
|
|
};
|
||
|
|
};
|
||
|
|
|
||
|
|
- |
|
||
|
|
// Example 3 (ARM 926EJ-S uniprocessor 32-bit system):
|
||
|
|
cpus {
|
||
|
|
#size-cells = <0>;
|
||
|
|
#address-cells = <1>;
|
||
|
|
|
||
|
|
cpu@0 {
|
||
|
|
device_type = "cpu";
|
||
|
|
compatible = "arm,arm926ej-s";
|
||
|
|
reg = <0x0>;
|
||
|
|
};
|
||
|
|
};
|
||
|
|
|
||
|
|
- |
|
||
|
|
// Example 4 (ARM Cortex-A57 64-bit system):
|
||
|
|
cpus {
|
||
|
|
#size-cells = <0>;
|
||
|
|
#address-cells = <2>;
|
||
|
|
|
||
|
|
cpu@0 {
|
||
|
|
device_type = "cpu";
|
||
|
|
compatible = "arm,cortex-a57";
|
||
|
|
reg = <0x0 0x0>;
|
||
|
|
enable-method = "spin-table";
|
||
|
|
cpu-release-addr = <0 0x20000000>;
|
||
|
|
};
|
||
|
|
|
||
|
|
cpu@1 {
|
||
|
|
device_type = "cpu";
|
||
|
|
compatible = "arm,cortex-a57";
|
||
|
|
reg = <0x0 0x1>;
|
||
|
|
enable-method = "spin-table";
|
||
|
|
cpu-release-addr = <0 0x20000000>;
|
||
|
|
};
|
||
|
|
|
||
|
|
cpu@100 {
|
||
|
|
device_type = "cpu";
|
||
|
|
compatible = "arm,cortex-a57";
|
||
|
|
reg = <0x0 0x100>;
|
||
|
|
enable-method = "spin-table";
|
||
|
|
cpu-release-addr = <0 0x20000000>;
|
||
|
|
};
|
||
|
|
|
||
|
|
cpu@101 {
|
||
|
|
device_type = "cpu";
|
||
|
|
compatible = "arm,cortex-a57";
|
||
|
|
reg = <0x0 0x101>;
|
||
|
|
enable-method = "spin-table";
|
||
|
|
cpu-release-addr = <0 0x20000000>;
|
||
|
|
};
|
||
|
|
|
||
|
|
cpu@10000 {
|
||
|
|
device_type = "cpu";
|
||
|
|
compatible = "arm,cortex-a57";
|
||
|
|
reg = <0x0 0x10000>;
|
||
|
|
enable-method = "spin-table";
|
||
|
|
cpu-release-addr = <0 0x20000000>;
|
||
|
|
};
|
||
|
|
|
||
|
|
cpu@10001 {
|
||
|
|
device_type = "cpu";
|
||
|
|
compatible = "arm,cortex-a57";
|
||
|
|
reg = <0x0 0x10001>;
|
||
|
|
enable-method = "spin-table";
|
||
|
|
cpu-release-addr = <0 0x20000000>;
|
||
|
|
};
|
||
|
|
|
||
|
|
cpu@10100 {
|
||
|
|
device_type = "cpu";
|
||
|
|
compatible = "arm,cortex-a57";
|
||
|
|
reg = <0x0 0x10100>;
|
||
|
|
enable-method = "spin-table";
|
||
|
|
cpu-release-addr = <0 0x20000000>;
|
||
|
|
};
|
||
|
|
|
||
|
|
cpu@10101 {
|
||
|
|
device_type = "cpu";
|
||
|
|
compatible = "arm,cortex-a57";
|
||
|
|
reg = <0x0 0x10101>;
|
||
|
|
enable-method = "spin-table";
|
||
|
|
cpu-release-addr = <0 0x20000000>;
|
||
|
|
};
|
||
|
|
|
||
|
|
cpu@100000000 {
|
||
|
|
device_type = "cpu";
|
||
|
|
compatible = "arm,cortex-a57";
|
||
|
|
reg = <0x1 0x0>;
|
||
|
|
enable-method = "spin-table";
|
||
|
|
cpu-release-addr = <0 0x20000000>;
|
||
|
|
};
|
||
|
|
|
||
|
|
cpu@100000001 {
|
||
|
|
device_type = "cpu";
|
||
|
|
compatible = "arm,cortex-a57";
|
||
|
|
reg = <0x1 0x1>;
|
||
|
|
enable-method = "spin-table";
|
||
|
|
cpu-release-addr = <0 0x20000000>;
|
||
|
|
};
|
||
|
|
|
||
|
|
cpu@100000100 {
|
||
|
|
device_type = "cpu";
|
||
|
|
compatible = "arm,cortex-a57";
|
||
|
|
reg = <0x1 0x100>;
|
||
|
|
enable-method = "spin-table";
|
||
|
|
cpu-release-addr = <0 0x20000000>;
|
||
|
|
};
|
||
|
|
|
||
|
|
cpu@100000101 {
|
||
|
|
device_type = "cpu";
|
||
|
|
compatible = "arm,cortex-a57";
|
||
|
|
reg = <0x1 0x101>;
|
||
|
|
enable-method = "spin-table";
|
||
|
|
cpu-release-addr = <0 0x20000000>;
|
||
|
|
};
|
||
|
|
|
||
|
|
cpu@100010000 {
|
||
|
|
device_type = "cpu";
|
||
|
|
compatible = "arm,cortex-a57";
|
||
|
|
reg = <0x1 0x10000>;
|
||
|
|
enable-method = "spin-table";
|
||
|
|
cpu-release-addr = <0 0x20000000>;
|
||
|
|
};
|
||
|
|
|
||
|
|
cpu@100010001 {
|
||
|
|
device_type = "cpu";
|
||
|
|
compatible = "arm,cortex-a57";
|
||
|
|
reg = <0x1 0x10001>;
|
||
|
|
enable-method = "spin-table";
|
||
|
|
cpu-release-addr = <0 0x20000000>;
|
||
|
|
};
|
||
|
|
|
||
|
|
cpu@100010100 {
|
||
|
|
device_type = "cpu";
|
||
|
|
compatible = "arm,cortex-a57";
|
||
|
|
reg = <0x1 0x10100>;
|
||
|
|
enable-method = "spin-table";
|
||
|
|
cpu-release-addr = <0 0x20000000>;
|
||
|
|
};
|
||
|
|
|
||
|
|
cpu@100010101 {
|
||
|
|
device_type = "cpu";
|
||
|
|
compatible = "arm,cortex-a57";
|
||
|
|
reg = <0x1 0x10101>;
|
||
|
|
enable-method = "spin-table";
|
||
|
|
cpu-release-addr = <0 0x20000000>;
|
||
|
|
};
|
||
|
|
};
|
||
|
|
...
|