system/arm/dt/armv8_big_little.dts

/*
 * Copyright (c) 2015-2016, 2019 ARM Limited
 * All rights reserved
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met: redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer;
 * redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution;
 * neither the name of the copyright holders nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/dts-v1/;

/memreserve/ 0x80000000 0x00010000;

/include/ CONF_PLATFORM

/* Assign a unique ID for pre-defined configurations. The selected
 * configuration is picked up from CONF_CPUS
*/
// 2 big and 2 little cpus
#define _2_2 1
// 2 big and 4 little cpus
#define _2_4 2

#define CPU(n,id) \
	CPU ## n: cpu@ ## id { \
		device_type = "cpu"; \
		compatible = "gem5,armv8", "arm,armv8"; \
		reg = < ## id >; \
		enable-method = "spin-table"; \
		cpu-release-addr = <0 0x87fffff8>; \
	};


/ {
	model = "V2P-AARCH64";
	compatible = "arm,vexpress,v2p-aarch64", "arm,vexpress";

	memory@80000000 {
		device_type = "memory";
		reg = <0 0x80000000 0x4 0x00000000>;
	};



	cpus {
		#address-cells = <1>;
		#size-cells = <0>;

		#if CONF_CPUS == _2_2
		CPU(0,0x0)
		CPU(1,0x1)
		CPU(2,0x102)
		CPU(3,0x103)
		cpu-map {
			cluster0 {
				core0 { cpu = <&CPU0>; };
				core1 { cpu = <&CPU1>; };
			};
			cluster1 {
				core0 { cpu = <&CPU2>; };
				core1 { cpu = <&CPU3>; };
			};
		};
		#elif CONF_CPUS == _2_4
		CPU(0,0x0)
		CPU(1,0x1)
		CPU(2,0x102)
		CPU(3,0x103)
		CPU(4,0x104)
		CPU(5,0x105)
		cpu-map {
			cluster0 {
				core0 { cpu = <&CPU0>; };
				core1 { cpu = <&CPU1>; };
			};
			cluster1 {
				core0 { cpu = <&CPU2>; };
				core1 { cpu = <&CPU3>; };
				core2 { cpu = <&CPU4>; };
				core3 { cpu = <&CPU5>; };
			};
		};
		#else
		#error Missing configuration section
		#endif
	};
};