1 #include "bcm283x.dtsi"
2 #include "bcm2835-common.dtsi"
3
4 / {
5 compatible = "brcm,bcm2837";
6
7 soc {
8 ranges = <0x7e000000 0x3f000000 0x1000000>,
9 <0x40000000 0x40000000 0x00001000>;
10 dma-ranges = <0xc0000000 0x00000000 0x3f000000>;
11
12 local_intc: interrupt-controller@40000000 {
13 compatible = "brcm,bcm2836-l1-intc";
14 reg = <0x40000000 0x100>;
15 interrupt-controller;
16 #interrupt-cells = <2>;
17 interrupt-parent = <&local_intc>;
18 };
19 };
20
21 arm-pmu {
22 compatible = "arm,cortex-a53-pmu";
23 interrupt-parent = <&local_intc>;
24 interrupts = <9 IRQ_TYPE_LEVEL_HIGH>;
25 };
26
27 timer {
28 compatible = "arm,armv7-timer";
29 interrupt-parent = <&local_intc>;
30 interrupts = <0 IRQ_TYPE_LEVEL_HIGH>, // PHYS_SECURE_PPI
31 <1 IRQ_TYPE_LEVEL_HIGH>, // PHYS_NONSECURE_PPI
32 <3 IRQ_TYPE_LEVEL_HIGH>, // VIRT_PPI
33 <2 IRQ_TYPE_LEVEL_HIGH>; // HYP_PPI
34 always-on;
35 };
36
37 cpus: cpus {
38 #address-cells = <1>;
39 #size-cells = <0>;
40 enable-method = "brcm,bcm2836-smp"; // for ARM 32-bit
41
42 /* Source for d/i-cache-line-size and d/i-cache-sets
43 * https://developer.arm.com/documentation/ddi0500/e/level-1-memory-system
44 * /about-the-l1-memory-system?lang=en
45 *
46 * Source for d/i-cache-size
47 * https://magpi.raspberrypi.com/articles/raspberry-pi-3-specs-benchmarks
48 */
49 cpu0: cpu@0 {
50 device_type = "cpu";
51 compatible = "arm,cortex-a53";
52 reg = <0>;
53 enable-method = "spin-table";
54 cpu-release-addr = <0x0 0x000000d8>;
55 d-cache-size = <0x8000>;
56 d-cache-line-size = <64>;
57 d-cache-sets = <128>; // 32KiB(size)/64(line-size)=512ways/4-way set
58 i-cache-size = <0x8000>;
59 i-cache-line-size = <64>;
60 i-cache-sets = <256>; // 32KiB(size)/64(line-size)=512ways/2-way set
61 next-level-cache = <&l2>;
62 };
63
64 cpu1: cpu@1 {
65 device_type = "cpu";
66 compatible = "arm,cortex-a53";
67 reg = <1>;
68 enable-method = "spin-table";
69 cpu-release-addr = <0x0 0x000000e0>;
70 d-cache-size = <0x8000>;
71 d-cache-line-size = <64>;
72 d-cache-sets = <128>; // 32KiB(size)/64(line-size)=512ways/4-way set
73 i-cache-size = <0x8000>;
74 i-cache-line-size = <64>;
75 i-cache-sets = <256>; // 32KiB(size)/64(line-size)=512ways/2-way set
76 next-level-cache = <&l2>;
77 };
78
79 cpu2: cpu@2 {
80 device_type = "cpu";
81 compatible = "arm,cortex-a53";
82 reg = <2>;
83 enable-method = "spin-table";
84 cpu-release-addr = <0x0 0x000000e8>;
85 d-cache-size = <0x8000>;
86 d-cache-line-size = <64>;
87 d-cache-sets = <128>; // 32KiB(size)/64(line-size)=512ways/4-way set
88 i-cache-size = <0x8000>;
89 i-cache-line-size = <64>;
90 i-cache-sets = <256>; // 32KiB(size)/64(line-size)=512ways/2-way set
91 next-level-cache = <&l2>;
92 };
93
94 cpu3: cpu@3 {
95 device_type = "cpu";
96 compatible = "arm,cortex-a53";
97 reg = <3>;
98 enable-method = "spin-table";
99 cpu-release-addr = <0x0 0x000000f0>;
100 d-cache-size = <0x8000>;
101 d-cache-line-size = <64>;
102 d-cache-sets = <128>; // 32KiB(size)/64(line-size)=512ways/4-way set
103 i-cache-size = <0x8000>;
104 i-cache-line-size = <64>;
105 i-cache-sets = <256>; // 32KiB(size)/64(line-size)=512ways/2-way set
106 next-level-cache = <&l2>;
107 };
108
109 /* Source for cache-line-size + cache-sets
110 * https://developer.arm.com/documentation/ddi0500
111 * /e/level-2-memory-system/about-the-l2-memory-system?lang=en
112 * Source for cache-size
113 * https://datasheets.raspberrypi.com/cm/cm1-and-cm3-datasheet.pdf
114 */
115 l2: l2-cache0 {
116 compatible = "cache";
117 cache-unified;
118 cache-size = <0x80000>;
119 cache-line-size = <64>;
120 cache-sets = <512>; // 512KiB(size)/64(line-size)=8192ways/16-way set
121 cache-level = <2>;
122 };
123 };
124 };
125
126 /* Make the BCM2835-style global interrupt controller be a child of the
127 * CPU-local interrupt controller.
128 */
129 &intc {
130 compatible = "brcm,bcm2836-armctrl-ic";
131 reg = <0x7e00b200 0x200>;
132 interrupt-parent = <&local_intc>;
133 interrupts = <8 IRQ_TYPE_LEVEL_HIGH>;
134 };
135
136 &cpu_thermal {
137 coefficients = <(-538) 412000>;
138 };
139
140 /* enable thermal sensor with the correct compatible property set */
141 &thermal {
142 compatible = "brcm,bcm2837-thermal";
143 status = "okay";
144 };
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