Resguardo inicial

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lastdragon
2026-09-06 12:53:21 -06:00
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commit ad2088d178
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========================================================
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
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>;
};
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========================================================
Secondary CPU enable-method "marvell,berlin-smp" binding
========================================================
This document describes the "marvell,berlin-smp" method for enabling secondary
CPUs. To apply to all CPUs, a single "marvell,berlin-smp" enable method should
be defined in the "cpus" node.
Enable method name: "marvell,berlin-smp"
Compatible machines: "marvell,berlin2" and "marvell,berlin2q"
Compatible CPUs: "marvell,pj4b" and "arm,cortex-a9"
Related properties: (none)
Note:
This enable method needs valid nodes compatible with "arm,cortex-a9-scu" and
"marvell,berlin-cpu-ctrl"[1].
Example:
cpus {
#address-cells = <1>;
#size-cells = <0>;
enable-method = "marvell,berlin-smp";
cpu@0 {
compatible = "marvell,pj4b";
device_type = "cpu";
next-level-cache = <&l2>;
reg = <0>;
};
cpu@1 {
compatible = "marvell,pj4b";
device_type = "cpu";
next-level-cache = <&l2>;
reg = <1>;
};
};
--
[1] arm/marvell,berlin.txt
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=========================================================
Secondary CPU enable-method "nuvoton,npcm750-smp" binding
=========================================================
To apply to all CPUs, a single "nuvoton,npcm750-smp" enable method should be
defined in the "cpus" node.
Enable method name: "nuvoton,npcm750-smp"
Compatible machines: "nuvoton,npcm750"
Compatible CPUs: "arm,cortex-a9"
Related properties: (none)
Note:
This enable method needs valid nodes compatible with "arm,cortex-a9-scu" and
"nuvoton,npcm750-gcr".
Example:
cpus {
#address-cells = <1>;
#size-cells = <0>;
enable-method = "nuvoton,npcm750-smp";
cpu@0 {
device_type = "cpu";
compatible = "arm,cortex-a9";
clocks = <&clk NPCM7XX_CLK_CPU>;
clock-names = "clk_cpu";
reg = <0>;
next-level-cache = <&L2>;
};
cpu@1 {
device_type = "cpu";
compatible = "arm,cortex-a9";
clocks = <&clk NPCM7XX_CLK_CPU>;
clock-names = "clk_cpu";
reg = <1>;
next-level-cache = <&L2>;
};
};