arch/arm/boot/dts/samsung/exynos5420-cpus.dtsi

Source file repositories/reference/linux-study-clean/arch/arm/boot/dts/samsung/exynos5420-cpus.dtsi

File Facts

System
Linux kernel
Corpus path
arch/arm/boot/dts/samsung/exynos5420-cpus.dtsi
Extension
.dtsi
Size
3999 bytes
Lines
164
Domain
Architecture Layer
Bucket
arch/arm
Inferred role
Architecture Layer: configuration, schema, or hardware description
Status
atlas-only

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0
/*
 * Samsung Exynos5420 SoC cpu device tree source
 *
 * Copyright (c) 2015 Samsung Electronics Co., Ltd.
 *		http://www.samsung.com
 *
 * This file provides desired ordering for Exynos5420 and Exynos5800
 * boards: CPU[0123] being the A15.
 *
 * The Exynos5420, 5422 and 5800 actually share the same CPU configuration
 * but particular boards choose different booting order.
 *
 * Exynos5420 and Exynos5800 always boot from Cortex-A15. On Exynos5422
 * booting cluster (big or LITTLE) is chosen by IROM code by reading
 * the gpg2-1 GPIO. By default all Exynos5422 based boards choose booting
 * from the LITTLE: Cortex-A7.
 */

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

		cpu-map {
			cluster0 {
				core0 {
					cpu = <&cpu0>;
				};
				core1 {
					cpu = <&cpu1>;
				};
				core2 {
					cpu = <&cpu2>;
				};
				core3 {
					cpu = <&cpu3>;
				};
			};

			cluster1 {
				core0 {
					cpu = <&cpu4>;
				};
				core1 {
					cpu = <&cpu5>;
				};
				core2 {
					cpu = <&cpu6>;
				};
				core3 {
					cpu = <&cpu7>;
				};
			};
		};

		cpu0: cpu@0 {
			device_type = "cpu";
			compatible = "arm,cortex-a15";
			reg = <0x0>;
			clocks = <&clock CLK_ARM_CLK>;
			clock-frequency = <1800000000>;
			cci-control-port = <&cci_control1>;
			operating-points-v2 = <&cluster_a15_opp_table>;
			#cooling-cells = <2>; /* min followed by max */
			capacity-dmips-mhz = <1024>;
		};

		cpu1: cpu@1 {
			device_type = "cpu";

Annotation

Implementation Notes