fdts/arm_fpga.dts

// SPDX-License-Identifier: (GPL-2.0 or BSD-3-Clause)
/*
 * Copyright (c) 2020, Arm Limited. All rights reserved.
 *
 * Devicetree for the Arm Ltd. FPGA platform
 * Number and kind of CPU cores differs from image to image, so the
 * topology is auto-detected by BL31, and the /cpus node is created and
 * populated accordingly at runtime.
 */

#include <dt-bindings/interrupt-controller/arm-gic.h>

/dts-v1/;

/ {
	model = "ARM FPGA";
	compatible = "arm,fpga", "arm,vexpress";
	interrupt-parent = <&gic>;
	#address-cells = <2>;
	#size-cells = <2>;

	aliases {
		serial0 = &dbg_uart;
	};

	chosen {
		stdout-path = "serial0:38400n8";
		bootargs = "console=ttyAMA0,38400n8 earlycon";
		/* Allow to upload a generous 100MB initrd payload. */
		linux,initrd-start = <0x0 0x84000000>;
		linux,initrd-end = <0x0 0x85400000>;
	};

	/* /cpus node will be added by BL31 at runtime. */

	psci {
		compatible = "arm,psci-0.2";
		method = "smc";
	};

	timer {
		compatible = "arm,armv8-timer";
		clock-frequency = <10000000>;
		interrupts = <GIC_PPI 13 IRQ_TYPE_LEVEL_LOW>,
			     <GIC_PPI 14 IRQ_TYPE_LEVEL_LOW>,
			     <GIC_PPI 11 IRQ_TYPE_LEVEL_LOW>,
			     <GIC_PPI 10 IRQ_TYPE_LEVEL_LOW>;
	};

	pmu {
		compatible = "arm,armv8-pmuv3";
		interrupts = <GIC_PPI 7 IRQ_TYPE_LEVEL_HIGH>;
	};

	/* This node will be removed at runtime on cores without SPE. */
	spe-pmu {
		compatible = "arm,statistical-profiling-extension-v1";
		interrupts = <GIC_PPI 5 IRQ_TYPE_LEVEL_HIGH>;
	};

	memory@80000000 {
		device_type = "memory";
		reg = <0x0 0x80000000 0x0 0x80000000>,
		      <0x8 0x80000000 0x1 0x80000000>;
	};


	bus_refclk: refclk {
		compatible = "fixed-clock";
		#clock-cells = <0>;
		clock-frequency = <100000000>;
		clock-output-names = "apb_pclk";
	};

	uartclk: baudclock {
		compatible = "fixed-clock";
		#clock-cells = <0>;
		clock-frequency = <10000000>;
		clock-output-names = "uartclk";
	};

	dbg_uart: serial@7ff80000 {
		compatible = "arm,pl011", "arm,primecell";
		reg = <0x0 0x7ff80000 0x0 0x00001000>;
		interrupts = <GIC_SPI 115 IRQ_TYPE_LEVEL_HIGH>;
		clocks = <&uartclk>, <&bus_refclk>;
		clock-names = "uartclk", "apb_pclk";
	};

	gic: interrupt-controller@30000000 {
		compatible = "arm,gic-v3";
		#address-cells = <2>;
		#interrupt-cells = <3>;
		#size-cells = <2>;
		ranges;
		interrupt-controller;
		reg = <0x0 0x30000000 0x0 0x00010000>,	/* GICD */
	/* The GICR size will be adjusted at runtime to match the cores. */
		      <0x0 0x30040000 0x0 0x00020000>;	/* GICR for one core */
		interrupts = <GIC_PPI 9 IRQ_TYPE_LEVEL_HIGH>;
	};
};