1======================================================== 2Secondary CPU enable-method "al,alpine-smp" binding 3======================================================== 4 5This document describes the "al,alpine-smp" method for 6enabling secondary CPUs. To apply to all CPUs, a single 7"al,alpine-smp" enable method should be defined in the 8"cpus" node. 9 10Enable method name: "al,alpine-smp" 11Compatible machines: "al,alpine" 12Compatible CPUs: "arm,cortex-a15" 13Related properties: (none) 14 15Note: 16This 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 22The CPU resume register are used to define required resume address after 23reset. 24 25Properties: 26- compatible : Should contain "al,alpine-cpu-resume". 27- reg : Offset and length of the register set for the device 28 29 30* Alpine System-Fabric Service Registers 31 32The System-Fabric Service Registers allow various operation on CPU and 33system fabric, like powering CPUs off. 34 35Properties: 36- compatible : Should contain "al,alpine-sysfabric-service" and "syscon". 37- reg : Offset and length of the register set for the device 38 39 40Example: 41 42cpus { 43 #address-cells = <1>; 44 #size-cells = <0>; 45 enable-method = "al,alpine-smp"; 46 47 cpu@0 { 48 compatible = "arm,cortex-a15"; 49 device_type = "cpu"; 50 reg = <0>; 51 }; 52 53 cpu@1 { 54 compatible = "arm,cortex-a15"; 55 device_type = "cpu"; 56 reg = <1>; 57 }; 58 59 cpu@2 { 60 compatible = "arm,cortex-a15"; 61 device_type = "cpu"; 62 reg = <2>; 63 }; 64 65 cpu@3 { 66 compatible = "arm,cortex-a15"; 67 device_type = "cpu"; 68 reg = <3>; 69 }; 70}; 71 72cpu_resume { 73 compatible = "al,alpine-cpu-resume"; 74 reg = <0xfbff5ed0 0x30>; 75}; 76 77nb_service { 78 compatible = "al,alpine-sysfabric-service", "syscon"; 79 reg = <0xfb070000 0x10000>; 80}; 81