14fb13790SSuzuki K Poulose# SPDX-License-Identifier: GPL-2.0-only or BSD-2-Clause 24fb13790SSuzuki K Poulose# Copyright 2021, Arm Ltd 34fb13790SSuzuki K Poulose%YAML 1.2 44fb13790SSuzuki K Poulose--- 5*92c2b1c1SRob Herring$id: "http://devicetree.org/schemas/arm/arm,trace-buffer-extension.yaml#" 64fb13790SSuzuki K Poulose$schema: "http://devicetree.org/meta-schemas/core.yaml#" 74fb13790SSuzuki K Poulose 84fb13790SSuzuki K Poulosetitle: ARM Trace Buffer Extensions 94fb13790SSuzuki K Poulose 104fb13790SSuzuki K Poulosemaintainers: 114fb13790SSuzuki K Poulose - Anshuman Khandual <anshuman.khandual@arm.com> 124fb13790SSuzuki K Poulose 134fb13790SSuzuki K Poulosedescription: | 144fb13790SSuzuki K Poulose Arm Trace Buffer Extension (TRBE) is a per CPU component 154fb13790SSuzuki K Poulose for storing trace generated on the CPU to memory. It is 164fb13790SSuzuki K Poulose accessed via CPU system registers. The software can verify 174fb13790SSuzuki K Poulose if it is permitted to use the component by checking the 184fb13790SSuzuki K Poulose TRBIDR register. 194fb13790SSuzuki K Poulose 204fb13790SSuzuki K Pouloseproperties: 214fb13790SSuzuki K Poulose $nodename: 224fb13790SSuzuki K Poulose const: "trbe" 234fb13790SSuzuki K Poulose compatible: 244fb13790SSuzuki K Poulose items: 254fb13790SSuzuki K Poulose - const: arm,trace-buffer-extension 264fb13790SSuzuki K Poulose 274fb13790SSuzuki K Poulose interrupts: 284fb13790SSuzuki K Poulose description: | 294fb13790SSuzuki K Poulose Exactly 1 PPI must be listed. For heterogeneous systems where 304fb13790SSuzuki K Poulose TRBE is only supported on a subset of the CPUs, please consult 314fb13790SSuzuki K Poulose the arm,gic-v3 binding for details on describing a PPI partition. 324fb13790SSuzuki K Poulose maxItems: 1 334fb13790SSuzuki K Poulose 344fb13790SSuzuki K Pouloserequired: 354fb13790SSuzuki K Poulose - compatible 364fb13790SSuzuki K Poulose - interrupts 374fb13790SSuzuki K Poulose 384fb13790SSuzuki K PouloseadditionalProperties: false 394fb13790SSuzuki K Poulose 404fb13790SSuzuki K Pouloseexamples: 414fb13790SSuzuki K Poulose 424fb13790SSuzuki K Poulose - | 434fb13790SSuzuki K Poulose #include <dt-bindings/interrupt-controller/arm-gic.h> 444fb13790SSuzuki K Poulose 454fb13790SSuzuki K Poulose trbe { 464fb13790SSuzuki K Poulose compatible = "arm,trace-buffer-extension"; 474fb13790SSuzuki K Poulose interrupts = <GIC_PPI 15 IRQ_TYPE_LEVEL_HIGH>; 484fb13790SSuzuki K Poulose }; 494fb13790SSuzuki K Poulose... 50