bcm2835.dtsi

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    1 // SPDX-License-Identifier: GPL-2.0
    2 #include "bcm283x.dtsi"
    3 #include "bcm2835-common.dtsi"
    4 #include "bcm2835-rpi-common.dtsi"
    5 
    6 / {
    7         compatible = "brcm,bcm2835";
    8 
    9         cpus {
   10                 #address-cells = <1>;
   11                 #size-cells = <0>;
   12 
   13                 cpu@0 {
   14                         device_type = "cpu";
   15                         compatible = "arm,arm1176jzf-s";
   16                         reg = <0x0>;
   17                         /* Source for d/i-cache-line-size and d/i-cache-sets
   18                          * https://developer.arm.com/documentation/ddi0301
   19                          * /h/level-one-memory-system/cache-organization?lang=en
   20                          *
   21                          * Source for d/i-cache-size
   22                          * https://forums.raspberrypi.com/viewtopic.php?t=98428
   23                          *
   24                          * NOTE: The BCM2835 has a L2 cache but it is dedicated to the GPU
   25                          * It can be shared with the CPU through fw settings,
   26                          * but this is not recommended.
   27                          */
   28                         d-cache-size = <0x4000>;
   29                         d-cache-line-size = <16>;
   30                         d-cache-sets = <256>; // 16KiB(size)/16(line-size)=1024ways/4-way set
   31                         i-cache-size = <0x4000>;
   32                         i-cache-line-size = <16>;
   33                         i-cache-sets = <256>; // 16KiB(size)/16(line-size)=1024ways/4-way set
   34                 };
   35         };
   36 
   37         soc {
   38                 ranges = <0x7e000000 0x20000000 0x02000000>;
   39                 dma-ranges = <0x40000000 0x00000000 0x20000000>;
   40         };
   41 
   42         arm-pmu {
   43                 compatible = "arm,arm1176-pmu";
   44         };
   45 };
   46 
   47 &cpu_thermal {
   48         coefficients = <(-538)  407000>;
   49 };
   50 
   51 /* enable thermal sensor with the correct compatible property set */
   52 &thermal {
   53         compatible = "brcm,bcm2835-thermal";
   54         status = "okay";
   55 };

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FreeBSD/Linux Kernel Cross Reference sys/contrib/device-tree/src/arm/bcm2835.dtsi

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sys/contrib/device-tree/src/arm/bcm2835.dtsi