1*4882a593Smuzhiyun# SPDX-License-Identifier: GPL-2.0-only or BSD-2-Clause 2*4882a593Smuzhiyun# Copyright 2021, Arm Ltd 3*4882a593Smuzhiyun%YAML 1.2 4*4882a593Smuzhiyun--- 5*4882a593Smuzhiyun$id: "http://devicetree.org/schemas/arm/trbe.yaml#" 6*4882a593Smuzhiyun$schema: "http://devicetree.org/meta-schemas/core.yaml#" 7*4882a593Smuzhiyun 8*4882a593Smuzhiyuntitle: ARM Trace Buffer Extensions 9*4882a593Smuzhiyun 10*4882a593Smuzhiyunmaintainers: 11*4882a593Smuzhiyun - Anshuman Khandual <anshuman.khandual@arm.com> 12*4882a593Smuzhiyun 13*4882a593Smuzhiyundescription: | 14*4882a593Smuzhiyun Arm Trace Buffer Extension (TRBE) is a per CPU component 15*4882a593Smuzhiyun for storing trace generated on the CPU to memory. It is 16*4882a593Smuzhiyun accessed via CPU system registers. The software can verify 17*4882a593Smuzhiyun if it is permitted to use the component by checking the 18*4882a593Smuzhiyun TRBIDR register. 19*4882a593Smuzhiyun 20*4882a593Smuzhiyunproperties: 21*4882a593Smuzhiyun $nodename: 22*4882a593Smuzhiyun const: "trbe" 23*4882a593Smuzhiyun compatible: 24*4882a593Smuzhiyun items: 25*4882a593Smuzhiyun - const: arm,trace-buffer-extension 26*4882a593Smuzhiyun 27*4882a593Smuzhiyun interrupts: 28*4882a593Smuzhiyun description: | 29*4882a593Smuzhiyun Exactly 1 PPI must be listed. For heterogeneous systems where 30*4882a593Smuzhiyun TRBE is only supported on a subset of the CPUs, please consult 31*4882a593Smuzhiyun the arm,gic-v3 binding for details on describing a PPI partition. 32*4882a593Smuzhiyun maxItems: 1 33*4882a593Smuzhiyun 34*4882a593Smuzhiyunrequired: 35*4882a593Smuzhiyun - compatible 36*4882a593Smuzhiyun - interrupts 37*4882a593Smuzhiyun 38*4882a593SmuzhiyunadditionalProperties: false 39*4882a593Smuzhiyun 40*4882a593Smuzhiyunexamples: 41*4882a593Smuzhiyun 42*4882a593Smuzhiyun - | 43*4882a593Smuzhiyun #include <dt-bindings/interrupt-controller/arm-gic.h> 44*4882a593Smuzhiyun 45*4882a593Smuzhiyun trbe { 46*4882a593Smuzhiyun compatible = "arm,trace-buffer-extension"; 47*4882a593Smuzhiyun interrupts = <GIC_PPI 15 IRQ_TYPE_LEVEL_HIGH>; 48*4882a593Smuzhiyun }; 49*4882a593Smuzhiyun... 50