1 ========================================================
2 Secondary CPU enable-method "al,alpine-smp" binding
3 ========================================================
4
5 This document describes the "al,alpine-smp" method for
6 enabling secondary CPUs. To apply to all CPUs, a single
7 "al,alpine-smp" enable method should be defined in the
8 "cpus" node.
9
10 Enable method name: "al,alpine-smp"
11 Compatible machines: "al,alpine"
12 Compatible CPUs: "arm,cortex-a15"
13 Related properties: (none)
14
15 Note:
16 This enable method requires valid nodes compatible with
17 "al,alpine-cpu-resume" and "al,alpine-nb-service".
18
19
20 * Alpine CPU resume registers
21
22 The CPU resume register are used to define required resume address after
23 reset.
24
25 Properties:
26 - compatible : Should contain "al,alpine-cpu-resume".
27 - reg : Offset and length of the register set for the device
28
29
30 Example:
31
32 cpus {
33 #address-cells = <1>;
34 #size-cells = <0>;
35 enable-method = "al,alpine-smp";
36
37 cpu@0 {
38 compatible = "arm,cortex-a15";
39 device_type = "cpu";
40 reg = <0>;
41 };
42
43 cpu@1 {
44 compatible = "arm,cortex-a15";
45 device_type = "cpu";
46 reg = <1>;
47 };
48
49 cpu@2 {
50 compatible = "arm,cortex-a15";
51 device_type = "cpu";
52 reg = <2>;
53 };
54
55 cpu@3 {
56 compatible = "arm,cortex-a15";
57 device_type = "cpu";
58 reg = <3>;
59 };
60 };
61
62 cpu_resume {
63 compatible = "al,alpine-cpu-resume";
64 reg = <0xfbff5ed0 0x30>;
65 };
66
67 nb_service {
68 compatible = "al,alpine-sysfabric-service", "syscon";
69 reg = <0xfb070000 0x10000>;
70 };
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