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