9a236f82c1
For GIC multiple views feature support, all GIC Re-distributor's GICR_TYPER.last will be set. Because configuration view-0 can assign non-contiguous CPUs to views other than 0, in this case the GIC Redistributors' registers won't seem contiguous. So the GIC driver should cope with multiple sets of redistributors like multi-chip scenarios. In this patch we add multiple GIC redistributor regions support in GIC redistributor iteration. For more information, refer to the Multi view subsection in the GIC Technical Reference Manual. For example: https://developer.arm.com/documentation/101516/0400/Operation-of-GIC-700/Multi-view Signed-off-by: Ziad Elhanafy <ziad.elhanafy@arm.com>
54 lines
1.7 KiB
YAML
54 lines
1.7 KiB
YAML
#
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# Copyright 2025 Arm Limited and/or its affiliates <open-source-office@arm.com>
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#
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# SPDX-License-Identifier: Apache-2.0
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#
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description: |
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ARM Generic Interrupt Controller v3
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Examples for GICv3 devicetree nodes:
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gic: interrupt-controller@2cf00000 {
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compatible = "arm,gic-v3", "arm,gic";
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reg = <0x2f000000 0x10000>, /* GICD */
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<0x2f100000 0x200000>; /* GICR */
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interrupt-controller;
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#interrupt-cells = <3>;
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status = "okay";
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};
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gic: interrupt-controller@2c010000 {
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compatible = "arm,gic-v3", "arm,gic";
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redistributor-stride = <0x40000>; /* 256kB stride */
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redistributor-regions = <2>;
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reg = <0x2c010000 0x10000>, /* GICD */
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<0x2d000000 0x800000>, /* GICR 1: CPUs 0-31 */
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<0x2e000000 0x800000>; /* GICR 2: CPUs 32-63 */
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interrupt-controller;
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#interrupt-cells = <4>;
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status = "okay";
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};
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compatible: arm,gic-v3
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include: arm,gic.yaml
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properties:
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redistributor-stride:
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type: int
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description:
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If using padding pages, specifies the stride of consecutive
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redistributors which is the distance between consecutive redistributors in
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memory. Must be a multiple of 64kB. Required if the distance between
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redistributors is not the default 128kB.
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redistributor-regions:
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type: int
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description:
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The number of independent contiguous regions occupied by the redistributors.
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The term "regions" refers to distinct memory segments or areas allocated
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for redistributors within the system memory. The number of redistributor
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regions and their sizes are hardware-specific. Required if more than one
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such region is present.
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