1/*
2 * Copyright (c) 2004-2006 Apple Computer, Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
24 * limitations under the License.
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28
29#ifdef KERNEL_PRIVATE
30
31#ifndef _KERN_PMS_H_
32#define _KERN_PMS_H_
33
34#define pmsMaxStates 64
35#define HalfwayToForever 0x7FFFFFFFFFFFFFFFULL
36#define century 790560000000000ULL
37
38typedef void (*pmsSetFunc_t)(uint32_t, uint32_t, uint32_t); /* Function used to set hardware power state */
39typedef uint32_t (*pmsQueryFunc_t)(uint32_t, uint32_t); /* Function used to query hardware power state */
40
41typedef struct pmsStat {
42 uint64_t stTime[2]; /* Total time until switch to next step */
43 uint32_t stCnt[2]; /* Number of times switched to next step */
44} pmsStat;
45
46typedef struct pmsDef {
47 uint64_t pmsLimit; /* Max time in this state in microseconds */
48 uint32_t pmsStepID; /* Unique ID for this step */
49 uint32_t pmsSetCmd; /* Command to select power state */
50#define pmsCngXClk 0x80000000 /* Change external clock */
51#define pmsXUnk 0x7F /* External clock unknown */
52#define pmsXClk 0x7F000000 /* External clock frequency */
53#define pmsCngCPU 0x00800000 /* Change CPU parameters */
54#define pmsSync 0x00400000 /* Make changes synchronously, i.e., spin until delay finished */
55#define pmsMustCmp 0x00200000 /* Delay must complete before next change */
56#define pmsCPU 0x001F0000 /* CPU frequency */
57#define pmsCPUUnk 0x1F /* CPU frequency unknown */
58#define pmsCngVolt 0x00008000 /* Change voltage */
59#define pmsVoltage 0x00007F00 /* Voltage */
60#define pmsVoltUnk 0x7F /* Voltage unknown */
61#define pmsPowerID 0x000000FF /* Identify power state to HW */
62
63/* Special commands - various things */
64#define pmsDelay 0xFFFFFFFD /* Delayed step, no processor or platform changes. Timer expiration causes transition to pmsTDelay */
65#define pmsParkIt 0xFFFFFFFF /* Enters the parked state. No processor or platform changes. Timers cancelled */
66#define pmsCInit ((pmsXUnk << 24) | (pmsCPUUnk << 16) | (pmsVoltUnk << 8)) /* Initial current set command value */
67/* Note: pmsSetFuncInd is an index into a table of function pointers and pmsSetFunc is the address
68 * of a function. Initially, when you create a step table, this field is set as an index into
69 * a table of function addresses that gets passed as a parameter to pmsBuild. When pmsBuild
70 * internalizes the step and function tables, it converts the index to the function address.
71 */
72 union sf {
73 pmsSetFunc_t pmsSetFunc; /* Function used to set platform power state */
74 uint32_t pmsSetFuncInd; /* Index to function in function table */
75 } sf;
76
77 uint32_t pmsDown; /* Next state if going lower */
78 uint32_t pmsNext; /* Normal next state */
79 uint32_t pmsTDelay; /* State if command was pmsDelay and timer expired */
80} pmsDef;
81
82typedef struct pmsCtl {
83 pmsStat(*pmsStats)[pmsMaxStates]; /* Pointer to statistics information, 0 if not enabled */
84 pmsDef *pmsDefs[pmsMaxStates]; /* Indexed pointers to steps */
85} pmsCtl;
86
87/*
88 * Note that this block is in the middle of the per_proc and the size (32 bytes)
89 * can't be changed without moving it.
90 */
91
92typedef struct pmsd {
93 uint32_t pmsState; /* Current power management state */
94 uint32_t pmsCSetCmd; /* Current select command */
95 uint64_t pmsPop; /* Time of next step */
96 uint64_t pmsStamp; /* Time of transition to current state */
97 uint64_t pmsTime; /* Total time in this state */
98} pmsd;
99
100/*
101 * Required power management step programs
102 */
103
104enum {
105 pmsIdle = 0, /* Power state in idle loop */
106 pmsNorm = 1, /* Normal step - usually low power */
107 pmsNormHigh = 2, /* Highest power in normal step */
108 pmsBoost = 3, /* Boost/overdrive step */
109 pmsLow = 4, /* Lowest non-idle power state, no transitions */
110 pmsHigh = 5, /* Power step for full on, no transitions */
111 pmsPrepCng = 6, /* Prepare for step table change */
112 pmsPrepSleep = 7, /* Prepare for sleep */
113 pmsOverTemp = 8, /* Machine is too hot */
114 pmsEnterNorm = 9, /* Enter into the normal step program */
115 pmsFree = 10, /* First available empty step */
116 pmsStartUp = 0xFFFFFFFE, /* Start stepping */
117 pmsParked = 0xFFFFFFFF /* Power parked - used when changing stepping table */
118};
119
120/*
121 * Power Management Stepper Control requests
122 */
123
124enum {
125 pmsCPark = 0, /* Parks the stepper */
126 pmsCStart = 1, /* Starts normal steppping */
127 pmsCFLow = 2, /* Forces low power */
128 pmsCFHigh = 3, /* Forces high power */
129 pmsCCnfg = 4, /* Loads new stepper program */
130 pmsCQuery = 5, /* Query current step and state */
131 pmsCExperimental = 6, /* Enter experimental mode */
132 pmsGCtls = 7,
133 pmsGStats = 8,
134 pmsCVID = 9,
135 pmsCFree = 10 /* Next control command to be assigned */
136};
137
138/*
139 * User request control structure passed to sysctl
140 */
141typedef struct {
142 uint32_t request; /* stepper control request */
143 uint32_t reqsize; /* size of data */
144 void *reqaddr; /* read/write data buffer */
145} pmsctl_t;
146
147extern pmsCtl pmsCtls; /* Power Management Stepper control */
148extern uint32_t pmsBroadcastWait; /* Number of outstanding broadcasts */
149extern int pmsInstalled;
150extern int pmsExperimental;
151
152#define pmsSetFuncMax 32
153extern pmsSetFunc_t pmsFuncTab[pmsSetFuncMax];
154extern pmsQueryFunc_t pmsQueryFunc;
155extern uint32_t pmsPlatformData;
156
157extern kern_return_t pmsControl(uint32_t request, user_addr_t reqaddr, uint32_t reqsize);
158extern void pmsInit(void);
159extern void pmsStep(int timer);
160extern void pmsDown(void);
161extern void pmsSetStep(uint32_t nstep, int dir);
162extern void pmsRunLocal(uint32_t nstep);
163extern void pmsCPUSet(uint32_t sel);
164extern uint32_t pmsCPUQuery(void);
165extern uint32_t pmsCPUPackageQuery(void);
166extern void pmsCPUConf(void);
167extern void pmsCPUMachineInit(void);
168extern void pmsCPUInit(void);
169extern void pmsCPURun(uint32_t nstep);
170
171extern void pmsCPUYellowFlag(void);
172extern void pmsCPUGreenFlag(void);
173
174#ifdef __cplusplus
175extern "C" {
176#endif
177
178extern kern_return_t pmsBuild(pmsDef *pd, uint32_t pdsize, pmsSetFunc_t *functab, uint32_t platformData, pmsQueryFunc_t queryFunc);
179extern void pmsRun(uint32_t nstep);
180extern void pmsPark(void);
181extern void pmsStart(void);
182extern kern_return_t pmsCPULoadVIDTable(uint16_t *tablep, int nstates); /* i386 only */
183extern kern_return_t pmsCPUSetPStateLimit(uint32_t limit);
184#ifdef __cplusplus
185}
186#endif
187
188#endif /* _KERN_PMS_H_ */
189#endif /* KERNEL_PRIVATE */
190