Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/osfmk/ppc/pms.h
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1 /* 2 * Copyright (c) 2004-2005 Apple Computer, Inc. All rights reserved. 3 * 4 * @APPLE_LICENSE_HEADER_START@ 5 * 6 * The contents of this file constitute Original Code as defined in and 7 * are subject to the Apple Public Source License Version 1.1 (the 8 * "License"). You may not use this file except in compliance with the 9 * License. Please obtain a copy of the License at 10 * http://www.apple.com/publicsource and read it before using this file. 11 * 12 * This Original Code and all software distributed under the License are 13 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER 14 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 15 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the 17 * License for the specific language governing rights and limitations 18 * under the License. 19 * 20 * @APPLE_LICENSE_HEADER_END@ 21 */ 22 23 #ifdef KERNEL_PRIVATE 24 25 #ifndef _PPC_PMS_H_ 26 #define _PPC_PMS_H_ 27 28 #define pmsMaxStates 64 29 #define HalfwayToForever 0x7FFFFFFFFFFFFFFFULL 30 #define century 790560000000000ULL 31 32 typedef void (*pmsSetFunc_t)(uint32_t, uint32_t, uint32_t); /* Function used to set hardware power state */ 33 typedef uint32_t (*pmsQueryFunc_t)(uint32_t, uint32_t); /* Function used to query hardware power state */ 34 35 typedef struct pmsStat { 36 uint64_t stTime[2]; /* Total time until switch to next step */ 37 uint32_t stCnt[2]; /* Number of times switched to next step */ 38 } pmsStat; 39 40 typedef struct pmsDef { 41 uint64_t pmsLimit; /* Max time in this state in microseconds */ 42 uint32_t pmsStepID; /* Unique ID for this step */ 43 uint32_t pmsSetCmd; /* Command to select power state */ 44 #define pmsCngXClk 0x80000000 /* Change external clock */ 45 #define pmsXUnk 0x7F /* External clock unknown */ 46 #define pmsXClk 0x7F000000 /* External clock frequency */ 47 #define pmsCngCPU 0x00800000 /* Change CPU parameters */ 48 #define pmsSync 0x00400000 /* Make changes synchronously, i.e., spin until delay finished */ 49 #define pmsMustCmp 0x00200000 /* Delay must complete before next change */ 50 #define pmsCPU 0x001F0000 /* CPU frequency */ 51 #define pmsCPUUnk 0x1F /* CPU frequency unknown */ 52 #define pmsCngVolt 0x00008000 /* Change voltage */ 53 #define pmsVoltage 0x00007F00 /* Voltage */ 54 #define pmsVoltUnk 0x7F /* Voltage unknown */ 55 #define pmsPowerID 0x000000FF /* Identify power state to HW */ 56 57 /* Special commands - various things */ 58 #define pmsDelay 0xFFFFFFFD /* Delayed step, no processor or platform changes. Timer expiration causes transition to pmsTDelay */ 59 #define pmsParkIt 0xFFFFFFFF /* Enters the parked state. No processor or platform changes. Timers cancelled */ 60 #define pmsCInit ((pmsXUnk << 24) | (pmsCPUUnk << 16) | (pmsVoltUnk << 8)) /* Initial current set command value */ 61 /* Note: pmsSetFuncInd is an index into a table of function pointers and pmsSetFunc is the address 62 * of a function. Initially, when you create a step table, this field is set as an index into 63 * a table of function addresses that gets passed as a parameter to pmsBuild. When pmsBuild 64 * internalizes the step and function tables, it converts the index to the function address. 65 */ 66 union sf { 67 pmsSetFunc_t pmsSetFunc; /* Function used to set platform power state */ 68 uint32_t pmsSetFuncInd; /* Index to function in function table */ 69 } sf; 70 71 uint32_t pmsDown; /* Next state if going lower */ 72 uint32_t pmsNext; /* Normal next state */ 73 uint32_t pmsTDelay; /* State if command was pmsDelay and timer expired */ 74 } pmsDef; 75 76 typedef struct pmsCtl { 77 pmsStat (*pmsStats)[pmsMaxStates]; /* Pointer to statistics information, 0 if not enabled */ 78 pmsDef *pmsDefs[pmsMaxStates]; /* Indexed pointers to steps */ 79 } pmsCtl; 80 81 /* 82 * Note that this block is in the middle of the per_proc and the size (32 bytes) 83 * can't be changed without moving it. 84 */ 85 86 typedef struct pmsd { 87 uint32_t pmsState; /* Current power management state */ 88 uint32_t pmsCSetCmd; /* Current select command */ 89 uint64_t pmsPop; /* Time of next step */ 90 uint64_t pmsStamp; /* Time of transition to current state */ 91 uint64_t pmsTime; /* Total time in this state */ 92 } pmsd; 93 94 /* 95 * Required power management step programs 96 */ 97 98 enum { 99 pmsIdle = 0, /* Power state in idle loop */ 100 pmsNorm = 1, /* Normal step - usually low power */ 101 pmsNormHigh = 2, /* Highest power in normal step */ 102 pmsBoost = 3, /* Boost/overdrive step */ 103 pmsLow = 4, /* Lowest non-idle power state, no transitions */ 104 pmsHigh = 5, /* Power step for full on, no transitions */ 105 pmsPrepCng = 6, /* Prepare for step table change */ 106 pmsPrepSleep = 7, /* Prepare for sleep */ 107 pmsOverTemp = 8, /* Machine is too hot */ 108 pmsEnterNorm = 9, /* Enter into the normal step program */ 109 pmsFree = 10, /* First available empty step */ 110 pmsStartUp = 0xFFFFFFFE, /* Start stepping */ 111 pmsParked = 0xFFFFFFFF /* Power parked - used when changing stepping table */ 112 }; 113 114 /* 115 * Power Management Stepper Control requests 116 */ 117 118 enum { 119 pmsCPark = 0, /* Parks the stepper */ 120 pmsCStart = 1, /* Starts normal steppping */ 121 pmsCFLow = 2, /* Forces low power */ 122 pmsCFHigh = 3, /* Forces high power */ 123 pmsCCnfg = 4, /* Loads new stepper program */ 124 pmsCQuery = 5, /* Query current step and state */ 125 pmsCExperimental = 6, /* Enter experimental mode */ 126 pmsCFree = 7 /* Next control command to be assigned */ 127 }; 128 129 extern pmsCtl pmsCtls; /* Power Management Stepper control */ 130 extern uint32_t pmsCtlp; 131 extern uint32_t pmsBroadcastWait; /* Number of outstanding broadcasts */ 132 extern pmsDef pmsDefault[]; 133 extern int pmsInstalled; 134 extern int pmsExperimental; 135 136 #define pmsSetFuncMax 32 137 extern pmsSetFunc_t pmsFuncTab[pmsSetFuncMax]; 138 extern pmsQueryFunc_t pmsQueryFunc; 139 extern uint32_t pmsPlatformData; 140 141 extern int pmsCntrl(struct savearea *save); 142 extern void pmsInit(void); 143 extern void pmsStep(int timer); 144 extern void pmsDown(void); 145 extern void pmsSetStep(uint32_t nstep, int dir); 146 extern void pmsRemote(uint32_t nstep); 147 extern void pmsCPUSet(uint32_t sel); 148 extern uint32_t pmsCPUquery(void); 149 extern void pmsCPUConf(void); 150 extern void pmsCPUInit(void); 151 152 #ifdef __cplusplus 153 extern "C" { 154 #endif 155 156 extern kern_return_t pmsBuild(pmsDef *pd, uint32_t pdsize, pmsSetFunc_t *functab, uint32_t platformData, pmsQueryFunc_t queryFunc); 157 extern void pmsRun(uint32_t nstep); 158 extern void pmsRunLocal(uint32_t nstep); 159 extern void pmsPark(void); 160 extern void pmsStart(void); 161 162 #ifdef __cplusplus 163 } 164 #endif 165 166 #endif /* _PPC_PMS_H_ */ 167 #endif /* KERNEL_PRIVATE */
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