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#include "bcm283x.dtsi"
/ {
compatible = "brcm,bcm2837";
soc {
ranges = <0x7e000000 0x3f000000 0x1000000>,
<0x40000000 0x40000000 0x00001000>;
dma-ranges = <0xc0000000 0x00000000 0x3f000000>;
local_intc: local_intc@40000000 {
compatible = "brcm,bcm2836-l1-intc";
reg = <0x40000000 0x100>;
interrupt-controller;
#interrupt-cells = <2>;
interrupt-parent = <&local_intc>;
};
};
arm-pmu {
compatible = "arm,cortex-a53-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"; // for ARM 32-bit
/* Source for d/i-cache-line-size and d/i-cache-sets
* https://developer.arm.com/documentation/ddi0500/e/level-1-memory-system
* /about-the-l1-memory-system?lang=en
*
* Source for d/i-cache-size
* https://magpi.raspberrypi.com/articles/raspberry-pi-3-specs-benchmarks
*/
cpu0: cpu@0 {
device_type = "cpu";
compatible = "arm,cortex-a53";
reg = <0>;
enable-method = "spin-table";
cpu-release-addr = <0x0 0x000000d8>;
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 = <64>;
i-cache-sets = <256>; // 32KiB(size)/64(line-size)=512ways/2-way set
next-level-cache = <&l2>;
};
cpu1: cpu@1 {
device_type = "cpu";
compatible = "arm,cortex-a53";
reg = <1>;
enable-method = "spin-table";
cpu-release-addr = <0x0 0x000000e0>;
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 = <64>;
i-cache-sets = <256>; // 32KiB(size)/64(line-size)=512ways/2-way set
next-level-cache = <&l2>;
};
cpu2: cpu@2 {
device_type = "cpu";
compatible = "arm,cortex-a53";
reg = <2>;
enable-method = "spin-table";
cpu-release-addr = <0x0 0x000000e8>;
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 = <64>;
i-cache-sets = <256>; // 32KiB(size)/64(line-size)=512ways/2-way set
next-level-cache = <&l2>;
};
cpu3: cpu@3 {
device_type = "cpu";
compatible = "arm,cortex-a53";
reg = <3>;
enable-method = "spin-table";
cpu-release-addr = <0x0 0x000000f0>;
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 = <64>;
i-cache-sets = <256>; // 32KiB(size)/64(line-size)=512ways/2-way set
next-level-cache = <&l2>;
};
/* Source for cache-line-size + cache-sets
* https://developer.arm.com/documentation/ddi0500
* /e/level-2-memory-system/about-the-l2-memory-system?lang=en
* Source for cache-size
* https://datasheets.raspberrypi.com/cm/cm1-and-cm3-datasheet.pdf
*/
l2: l2-cache0 {
compatible = "cache";
cache-size = <0x80000>;
cache-line-size = <64>;
cache-sets = <512>; // 512KiB(size)/64(line-size)=8192ways/16-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) 412000>;
};
/* enable thermal sensor with the correct compatible property set */
&thermal {
compatible = "brcm,bcm2837-thermal";
status = "okay";
};
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