81 lines
1.7 KiB
Plaintext
81 lines
1.7 KiB
Plaintext
|
========================================================
|
||
|
Secondary CPU enable-method "al,alpine-smp" binding
|
||
|
========================================================
|
||
|
|
||
|
This document describes the "al,alpine-smp" method for
|
||
|
enabling secondary CPUs. To apply to all CPUs, a single
|
||
|
"al,alpine-smp" enable method should be defined in the
|
||
|
"cpus" node.
|
||
|
|
||
|
Enable method name: "al,alpine-smp"
|
||
|
Compatible machines: "al,alpine"
|
||
|
Compatible CPUs: "arm,cortex-a15"
|
||
|
Related properties: (none)
|
||
|
|
||
|
Note:
|
||
|
This enable method requires valid nodes compatible with
|
||
|
"al,alpine-cpu-resume" and "al,alpine-nb-service".
|
||
|
|
||
|
|
||
|
* Alpine CPU resume registers
|
||
|
|
||
|
The CPU resume register are used to define required resume address after
|
||
|
reset.
|
||
|
|
||
|
Properties:
|
||
|
- compatible : Should contain "al,alpine-cpu-resume".
|
||
|
- reg : Offset and length of the register set for the device
|
||
|
|
||
|
|
||
|
* Alpine System-Fabric Service Registers
|
||
|
|
||
|
The System-Fabric Service Registers allow various operation on CPU and
|
||
|
system fabric, like powering CPUs off.
|
||
|
|
||
|
Properties:
|
||
|
- compatible : Should contain "al,alpine-sysfabric-service" and "syscon".
|
||
|
- reg : Offset and length of the register set for the device
|
||
|
|
||
|
|
||
|
Example:
|
||
|
|
||
|
cpus {
|
||
|
#address-cells = <1>;
|
||
|
#size-cells = <0>;
|
||
|
enable-method = "al,alpine-smp";
|
||
|
|
||
|
cpu@0 {
|
||
|
compatible = "arm,cortex-a15";
|
||
|
device_type = "cpu";
|
||
|
reg = <0>;
|
||
|
};
|
||
|
|
||
|
cpu@1 {
|
||
|
compatible = "arm,cortex-a15";
|
||
|
device_type = "cpu";
|
||
|
reg = <1>;
|
||
|
};
|
||
|
|
||
|
cpu@2 {
|
||
|
compatible = "arm,cortex-a15";
|
||
|
device_type = "cpu";
|
||
|
reg = <2>;
|
||
|
};
|
||
|
|
||
|
cpu@3 {
|
||
|
compatible = "arm,cortex-a15";
|
||
|
device_type = "cpu";
|
||
|
reg = <3>;
|
||
|
};
|
||
|
};
|
||
|
|
||
|
cpu_resume {
|
||
|
compatible = "al,alpine-cpu-resume";
|
||
|
reg = <0xfbff5ed0 0x30>;
|
||
|
};
|
||
|
|
||
|
nb_service {
|
||
|
compatible = "al,alpine-sysfabric-service", "syscon";
|
||
|
reg = <0xfb070000 0x10000>;
|
||
|
};
|