# 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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$id: http://devicetree.org/schemas/arm/socionext/socionext,uniphier-system-cache.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: UniPhier outer cache controller
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description: |
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UniPhier ARM 32-bit SoCs are integrated with a full-custom outer cache
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controller system. All of them have a level 2 cache controller, and some
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have a level 3 cache controller as well.
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maintainers:
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- Masahiro Yamada <yamada.masahiro@socionext.com>
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properties:
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compatible:
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const: socionext,uniphier-system-cache
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reg:
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description: |
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should contain 3 regions: control register, revision register,
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operation register, in this order.
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minItems: 3
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maxItems: 3
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interrupts:
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description: |
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Interrupts can be used to notify the completion of cache operations.
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The number of interrupts should match to the number of CPU cores.
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The specified interrupts correspond to CPU0, CPU1, ... in this order.
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minItems: 1
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maxItems: 4
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cache-unified: true
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cache-size: true
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cache-sets: true
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cache-line-size: true
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cache-level:
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minimum: 2
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maximum: 3
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next-level-cache: true
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allOf:
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- $ref: /schemas/cache-controller.yaml#
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additionalProperties: false
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required:
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- compatible
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- reg
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- interrupts
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- cache-unified
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- cache-size
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- cache-sets
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- cache-line-size
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- cache-level
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examples:
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- |
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// System with L2.
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cache-controller@500c0000 {
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compatible = "socionext,uniphier-system-cache";
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reg = <0x500c0000 0x2000>, <0x503c0100 0x4>, <0x506c0000 0x400>;
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interrupts = <0 174 4>, <0 175 4>, <0 190 4>, <0 191 4>;
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cache-unified;
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cache-size = <0x140000>;
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cache-sets = <512>;
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cache-line-size = <128>;
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cache-level = <2>;
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};
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- |
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// System with L2 and L3.
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// L2 should specify the next level cache by 'next-level-cache'.
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l2: cache-controller@500c0000 {
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compatible = "socionext,uniphier-system-cache";
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reg = <0x500c0000 0x2000>, <0x503c0100 0x8>, <0x506c0000 0x400>;
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interrupts = <0 190 4>, <0 191 4>;
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cache-unified;
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cache-size = <0x200000>;
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cache-sets = <512>;
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cache-line-size = <128>;
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cache-level = <2>;
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next-level-cache = <&l3>;
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};
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l3: cache-controller@500c8000 {
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compatible = "socionext,uniphier-system-cache";
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reg = <0x500c8000 0x2000>, <0x503c8100 0x8>, <0x506c8000 0x400>;
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interrupts = <0 174 4>, <0 175 4>;
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cache-unified;
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cache-size = <0x200000>;
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cache-sets = <512>;
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cache-line-size = <256>;
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cache-level = <3>;
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};
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