1*2eb4d8dcSEmmanuel Vadot# SPDX-License-Identifier: GPL-2.0-only or BSD-2-Clause 2*2eb4d8dcSEmmanuel Vadot# Copyright 2021, Arm Ltd 3*2eb4d8dcSEmmanuel Vadot%YAML 1.2 4*2eb4d8dcSEmmanuel Vadot--- 5*2eb4d8dcSEmmanuel Vadot$id: "http://devicetree.org/schemas/arm/trbe.yaml#" 6*2eb4d8dcSEmmanuel Vadot$schema: "http://devicetree.org/meta-schemas/core.yaml#" 7*2eb4d8dcSEmmanuel Vadot 8*2eb4d8dcSEmmanuel Vadottitle: ARM Trace Buffer Extensions 9*2eb4d8dcSEmmanuel Vadot 10*2eb4d8dcSEmmanuel Vadotmaintainers: 11*2eb4d8dcSEmmanuel Vadot - Anshuman Khandual <anshuman.khandual@arm.com> 12*2eb4d8dcSEmmanuel Vadot 13*2eb4d8dcSEmmanuel Vadotdescription: | 14*2eb4d8dcSEmmanuel Vadot Arm Trace Buffer Extension (TRBE) is a per CPU component 15*2eb4d8dcSEmmanuel Vadot for storing trace generated on the CPU to memory. It is 16*2eb4d8dcSEmmanuel Vadot accessed via CPU system registers. The software can verify 17*2eb4d8dcSEmmanuel Vadot if it is permitted to use the component by checking the 18*2eb4d8dcSEmmanuel Vadot TRBIDR register. 19*2eb4d8dcSEmmanuel Vadot 20*2eb4d8dcSEmmanuel Vadotproperties: 21*2eb4d8dcSEmmanuel Vadot $nodename: 22*2eb4d8dcSEmmanuel Vadot const: "trbe" 23*2eb4d8dcSEmmanuel Vadot compatible: 24*2eb4d8dcSEmmanuel Vadot items: 25*2eb4d8dcSEmmanuel Vadot - const: arm,trace-buffer-extension 26*2eb4d8dcSEmmanuel Vadot 27*2eb4d8dcSEmmanuel Vadot interrupts: 28*2eb4d8dcSEmmanuel Vadot description: | 29*2eb4d8dcSEmmanuel Vadot Exactly 1 PPI must be listed. For heterogeneous systems where 30*2eb4d8dcSEmmanuel Vadot TRBE is only supported on a subset of the CPUs, please consult 31*2eb4d8dcSEmmanuel Vadot the arm,gic-v3 binding for details on describing a PPI partition. 32*2eb4d8dcSEmmanuel Vadot maxItems: 1 33*2eb4d8dcSEmmanuel Vadot 34*2eb4d8dcSEmmanuel Vadotrequired: 35*2eb4d8dcSEmmanuel Vadot - compatible 36*2eb4d8dcSEmmanuel Vadot - interrupts 37*2eb4d8dcSEmmanuel Vadot 38*2eb4d8dcSEmmanuel VadotadditionalProperties: false 39*2eb4d8dcSEmmanuel Vadot 40*2eb4d8dcSEmmanuel Vadotexamples: 41*2eb4d8dcSEmmanuel Vadot 42*2eb4d8dcSEmmanuel Vadot - | 43*2eb4d8dcSEmmanuel Vadot #include <dt-bindings/interrupt-controller/arm-gic.h> 44*2eb4d8dcSEmmanuel Vadot 45*2eb4d8dcSEmmanuel Vadot trbe { 46*2eb4d8dcSEmmanuel Vadot compatible = "arm,trace-buffer-extension"; 47*2eb4d8dcSEmmanuel Vadot interrupts = <GIC_PPI 15 IRQ_TYPE_LEVEL_HIGH>; 48*2eb4d8dcSEmmanuel Vadot }; 49*2eb4d8dcSEmmanuel Vadot... 50