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