Quelle  bcm2836.dtsi   Sprache: unbekannt

// SPDX-License-Identifier: GPL-2.0
#include "bcm283x.dtsi"
#include "bcm2835-common.dtsi"

/ {
 compatible = "brcm,bcm2836";

 soc {
  ranges = <0x7e000000 0x3f000000 0x1000000>,
    <0x40000000 0x40000000 0x00001000>;
  dma-ranges = <0xc0000000 0x00000000 0x3f000000>;

  local_intc: interrupt-controller@40000000 {
   compatible = "brcm,bcm2836-l1-intc";
   reg = <0x40000000 0x100>;
   interrupt-controller;
   #interrupt-cells = <2>;
   interrupt-parent = <&local_intc>;
  };
 };

 arm-pmu {
  compatible = "arm,cortex-a7-pmu";
  interrupt-parent = <&local_intc>;
  interrupts = <9 IRQ_TYPE_LEVEL_HIGH>;
 };

 timer {
  compatible = "arm,armv7-timer";
  interrupt-parent = <&local_intc>;
  interrupts = <0 IRQ_TYPE_LEVEL_HIGH>, // PHYS_SECURE_PPI
        <1 IRQ_TYPE_LEVEL_HIGH>, // PHYS_NONSECURE_PPI
        <3 IRQ_TYPE_LEVEL_HIGH>, // VIRT_PPI
        <2 IRQ_TYPE_LEVEL_HIGH>; // HYP_PPI
  always-on;
 };

 cpus: cpus {
  #address-cells = <1>;
  #size-cells = <0>;
  enable-method = "brcm,bcm2836-smp";

  /* Source for d/i-cache-line-size and d/i-cache-sets
   * https://developer.arm.com/documentation/ddi0464/f/L1-Memory-System
   * /About-the-L1-memory-system?lang=en
   *
   * Source for d/i-cache-size
   * https://forums.raspberrypi.com/viewtopic.php?t=98428
   */

  v7_cpu0: cpu@0 {
   device_type = "cpu";
   compatible = "arm,cortex-a7";
   reg = <0xf00>;
   clock-frequency = <800000000>;
   d-cache-size = <0x8000>;
   d-cache-line-size = <64>;
   d-cache-sets = <128>; // 32KiB(size)/64(line-size)=512ways/4-way set
   i-cache-size = <0x8000>;
   i-cache-line-size = <32>;
   i-cache-sets = <512>; // 32KiB(size)/32(line-size)=1024ways/2-way set
   next-level-cache = <&l2>;
  };

  v7_cpu1: cpu@1 {
   device_type = "cpu";
   compatible = "arm,cortex-a7";
   reg = <0xf01>;
   clock-frequency = <800000000>;
   d-cache-size = <0x8000>;
   d-cache-line-size = <64>;
   d-cache-sets = <128>; // 32KiB(size)/64(line-size)=512ways/4-way set
   i-cache-size = <0x8000>;
   i-cache-line-size = <32>;
   i-cache-sets = <512>; // 32KiB(size)/32(line-size)=1024ways/2-way set
   next-level-cache = <&l2>;
  };

  v7_cpu2: cpu@2 {
   device_type = "cpu";
   compatible = "arm,cortex-a7";
   reg = <0xf02>;
   clock-frequency = <800000000>;
   d-cache-size = <0x8000>;
   d-cache-line-size = <64>;
   d-cache-sets = <128>; // 32KiB(size)/64(line-size)=512ways/4-way set
   i-cache-size = <0x8000>;
   i-cache-line-size = <32>;
   i-cache-sets = <512>; // 32KiB(size)/32(line-size)=1024ways/2-way set
   next-level-cache = <&l2>;
  };

  v7_cpu3: cpu@3 {
   device_type = "cpu";
   compatible = "arm,cortex-a7";
   reg = <0xf03>;
   clock-frequency = <800000000>;
   d-cache-size = <0x8000>;
   d-cache-line-size = <64>;
   d-cache-sets = <128>; // 32KiB(size)/64(line-size)=512ways/4-way set
   i-cache-size = <0x8000>;
   i-cache-line-size = <32>;
   i-cache-sets = <512>; // 32KiB(size)/32(line-size)=1024ways/2-way set
   next-level-cache = <&l2>;
  };

  /* Source for cache-line-size + cache-sets
   * https://developer.arm.com/documentation/ddi0464/f/L2-Memory-System
   * /About-the-L2-Memory-system?lang=en
   * Source for cache-size
   * https://forums.raspberrypi.com/viewtopic.php?t=98428
   */
  l2: l2-cache0 {
   compatible = "cache";
   cache-unified;
   cache-size = <0x80000>;
   cache-line-size = <64>;
   cache-sets = <1024>; // 512KiB(size)/64(line-size)=8192ways/8-way set
   cache-level = <2>;
  };
 };
};

/* Make the BCM2835-style global interrupt controller be a child of the
 * CPU-local interrupt controller.
 */
&intc {
 compatible = "brcm,bcm2836-armctrl-ic";
 reg = <0x7e00b200 0x200>;
 interrupt-parent = <&local_intc>;
 interrupts = <8 IRQ_TYPE_LEVEL_HIGH>;
};

&cpu_thermal {
 coefficients = <(-538) 407000>;
};

/* enable thermal sensor with the correct compatible property set */
&thermal {
 compatible = "brcm,bcm2836-thermal";
 status = "okay";
};