75 lines
2.1 KiB
YAML
75 lines
2.1 KiB
YAML
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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/interrupt-controller/riscv,rpmi-system-msi.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: RISC-V RPMI system MSI service group based interrupt controller
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maintainers:
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- Anup Patel <anup@brainfault.org>
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description: |
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The RISC-V Platform Management Interface (RPMI) [1] defines a
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messaging protocol which is modular and extensible. The supervisor
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software can send/receive RPMI messages via SBI MPXY extension [2]
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or some dedicated supervisor-mode RPMI transport.
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The RPMI specification [1] defines system MSI service group which
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allow application processors to receive MSIs upon system events
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such as P2A doorbell, graceful shutdown/reboot request, CPU hotplug
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event, memory hotplug event, etc from the platform microcontroller.
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The supervisor software can access RPMI system MSI service group via
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SBI MPXY channel or some dedicated supervisor-mode RPMI transport.
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===========================================
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References
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===========================================
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[1] RISC-V Platform Management Interface (RPMI) v1.0 (or higher)
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https://github.com/riscv-non-isa/riscv-rpmi/releases
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[2] RISC-V Supervisor Binary Interface (SBI) v3.0 (or higher)
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https://github.com/riscv-non-isa/riscv-sbi-doc/releases
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allOf:
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- $ref: /schemas/interrupt-controller.yaml#
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properties:
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compatible:
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description:
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Intended for use by the supervisor software.
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const: riscv,rpmi-system-msi
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mboxes:
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maxItems: 1
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description:
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Mailbox channel of the underlying RPMI transport or SBI message proxy channel.
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msi-parent: true
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interrupt-controller: true
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"#interrupt-cells":
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const: 1
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required:
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- compatible
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- mboxes
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- msi-parent
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- interrupt-controller
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- "#interrupt-cells"
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additionalProperties: false
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examples:
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- |
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interrupt-controller {
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compatible = "riscv,rpmi-system-msi";
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mboxes = <&mpxy_mbox 0x2000 0x0>;
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msi-parent = <&imsic_slevel>;
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interrupt-controller;
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#interrupt-cells = <1>;
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};
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...
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