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1/*
2 * Copyright (c) 2006-2010 Apple 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#ifdef KERNEL_PRIVATE
29#ifndef _I386_PMCPU_H_
30#define _I386_PMCPU_H_
31
32#include <i386/cpu_topology.h>
33
34#ifndef ASSEMBLER
35
36/*
37 * This value should be changed each time that pmDispatch_t or pmCallBacks_t
38 * changes.
39 */
40#define PM_DISPATCH_VERSION 102
41
42/*
43 * Dispatch table for functions that get installed when the power
44 * management KEXT loads.
45 *
46 * pmDispatch_t is the set of functions that the kernel can use to call
47 * into the power management KEXT.
48 *
49 * pmCallBacks_t is the set of functions that the power management kext
50 * can call to get at specific kernel functions.
51 */
52typedef struct{
53 kern_return_t (*pmCPUStateInit)(void);
54 void (*cstateInit)(void);
55 uint64_t (*MachineIdle)(uint64_t maxIdleDuration);
56 uint64_t (*GetDeadline)(x86_lcpu_t *lcpu);
57 uint64_t (*SetDeadline)(x86_lcpu_t *lcpu, uint64_t);
58 void (*Deadline)(x86_lcpu_t *lcpu);
59 boolean_t (*exitIdle)(x86_lcpu_t *lcpu);
60 void (*markCPURunning)(x86_lcpu_t *lcpu);
61 int (*pmCPUControl)(uint32_t cmd, void *datap);
62 void (*pmCPUHalt)(void);
63 uint64_t (*getMaxSnoop)(void);
64 void (*setMaxBusDelay)(uint64_t time);
65 uint64_t (*getMaxBusDelay)(void);
66 void (*setMaxIntDelay)(uint64_t time);
67 uint64_t (*getMaxIntDelay)(void);
68 void (*pmCPUSafeMode)(x86_lcpu_t *lcpu, uint32_t flags);
69 void (*pmTimerStateSave)(void);
70 void (*pmTimerStateRestore)(void);
71 kern_return_t (*exitHalt)(x86_lcpu_t *lcpu);
72 kern_return_t (*exitHaltToOff)(x86_lcpu_t *lcpu);
73 void (*markAllCPUsOff)(void);
74 void (*pmSetRunCount)(uint32_t count);
75 boolean_t (*pmIsCPUUnAvailable)(x86_lcpu_t *lcpu);
76 int (*pmChooseCPU)(int startCPU, int endCPU, int preferredCPU);
77 int (*pmIPIHandler)(void *state);
78 void (*pmThreadTellUrgency)(int urgency, uint64_t rt_period, uint64_t rt_deadline);
79 void (*pmActiveRTThreads)(boolean_t active);
80 boolean_t (*pmInterruptPrewakeApplicable)(void);
81 void (*pmThreadGoingOffCore)(thread_t old_thread, boolean_t transfer_load,
82 uint64_t last_dispatch, boolean_t thread_runnable);
83} pmDispatch_t;
84
85/* common time fields exported to PM code. This structure may be
86 * allocated on the stack, so avoid making it unnecessarily large.
87 */
88typedef struct pm_rtc_nanotime {
89 uint64_t tsc_base; /* timestamp */
90 uint64_t ns_base; /* nanoseconds */
91 uint32_t scale; /* tsc -> nanosec multiplier */
92 uint32_t shift; /* tsc -> nanosec shift/div */
93 uint32_t generation; /* 0 == being updated */
94} pm_rtc_nanotime_t;
95
96typedef struct {
97 uint64_t (*setRTCPop)(uint64_t time);
98 void (*resyncDeadlines)(int cpu);
99 void (*initComplete)(void);
100 x86_lcpu_t *(*GetLCPU)(int cpu);
101 x86_core_t *(*GetCore)(int cpu);
102 x86_die_t *(*GetDie)(int cpu);
103 x86_pkg_t *(*GetPackage)(int cpu);
104 x86_lcpu_t *(*GetMyLCPU)(void);
105 x86_core_t *(*GetMyCore)(void);
106 x86_die_t *(*GetMyDie)(void);
107 x86_pkg_t *(*GetMyPackage)(void);
108 x86_pkg_t *(*GetPkgRoot)(void);
109 void (*LockCPUTopology)(int lock);
110 boolean_t (*GetHibernate)(int cpu);
111 processor_t (*LCPUtoProcessor)(int lcpu);
112 processor_t (*ThreadBind)(processor_t proc);
113 uint32_t (*GetSavedRunCount)(void);
114 void (*pmSendIPI)(int cpu);
115 void (*GetNanotimeInfo)(pm_rtc_nanotime_t *);
116 int (*ThreadGetUrgency)(uint64_t *rt_period, uint64_t *rt_deadline);
117 uint32_t (*timerQueueMigrate)(int cpu);
118 void (*RTCClockAdjust)(uint64_t adjustment);
119 x86_topology_parameters_t *topoParms;
120 boolean_t (*InterruptPending)(void);
121 boolean_t (*IsInterrupting)(uint8_t vector);
122 void (*InterruptStats)(uint64_t intrs[256]);
123 void (*DisableApicTimer)(void);
124} pmCallBacks_t;
125
126extern pmDispatch_t *pmDispatch;
127
128void power_management_init(void);
129void pmKextRegister(uint32_t version, pmDispatch_t *cpuFuncs,
130 pmCallBacks_t *callbacks);
131void pmUnRegister(pmDispatch_t *cpuFuncs);
132void pmCPUStateInit(void);
133uint64_t pmCPUGetDeadline(struct cpu_data *cpu);
134uint64_t pmCPUSetDeadline(struct cpu_data *cpu, uint64_t deadline);
135void pmCPUDeadline(struct cpu_data *cpu);
136boolean_t pmCPUExitIdle(struct cpu_data *cpu);
137void pmCPUMarkRunning(struct cpu_data *cpu);
138void pmMarkAllCPUsOff(void);
139int pmCPUControl(uint32_t cmd, void *datap);
140void pmCPUHalt(uint32_t reason);
141void pmTimerSave(void);
142void pmTimerRestore(void);
143kern_return_t pmCPUExitHalt(int cpu);
144kern_return_t pmCPUExitHaltToOff(int cpu);
145uint32_t pmTimerQueueMigrate(int);
146
147#define PM_HALT_NORMAL 0 /* normal halt path */
148#define PM_HALT_DEBUG 1 /* debug code wants to halt */
149#define PM_HALT_PANIC 2 /* panic code wants to halt */
150#define PM_HALT_SLEEP 3 /* sleep code wants to halt */
151
152void pmSafeMode(x86_lcpu_t *lcpu, uint32_t flags);
153
154#define PM_SAFE_FL_NORMAL 0x00000001 /* put CPU into "normal" power mode */
155#define PM_SAFE_FL_SAFE 0x00000002 /* put CPU into a "safe" power mode */
156#define PM_SAFE_FL_PAUSE 0x00000010 /* pause execution on the CPU */
157#define PM_SAFE_FL_RESUME 0x00000020 /* resume execution on the CPU */
158
159extern int pmsafe_debug;
160/* Default urgency timing threshold for the DEBUG build */
161#define URGENCY_NOTIFICATION_ASSERT_NS (5 * 1000 * 1000)
162extern uint64_t urgency_notification_assert_abstime_threshold;
163
164x86_lcpu_t *
165pmGetLogicalCPU(int cpu);
166x86_lcpu_t *
167pmGetMyLogicalCPU(void);
168processor_t
169pmLCPUtoProcessor(int lcpu);
170x86_pkg_t *
171pmGetPkgRoot(void);
172
173
174/******************************************************************************
175*
176* All of the following are deprecated interfaces and no longer used.
177*
178******************************************************************************/
179
180
181#endif /* ASSEMBLER */
182
183#endif /* _I386_PMCPU_H_ */
184#endif /* KERNEL_PRIVATE */