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1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __ACPI_PROCESSOR_H
3#define __ACPI_PROCESSOR_H
4
5#include <linux/cpu.h>
6#include <linux/cpufreq.h>
7#include <linux/pm_qos.h>
8#include <linux/printk.h>
9#include <linux/sched.h>
10#include <linux/smp.h>
11#include <linux/thermal.h>
12#include <linux/types.h>
13#include <linux/workqueue.h>
14
15#include <asm/acpi.h>
16
17#define ACPI_PROCESSOR_CLASS "processor"
18#define ACPI_PROCESSOR_DEVICE_NAME "Processor"
19#define ACPI_PROCESSOR_DEVICE_HID "ACPI0007"
20#define ACPI_PROCESSOR_CONTAINER_HID "ACPI0010"
21
22#define ACPI_PROCESSOR_BUSY_METRIC 10
23
24#define ACPI_PROCESSOR_MAX_POWER 8
25#define ACPI_PROCESSOR_MAX_C2_LATENCY 100
26#define ACPI_PROCESSOR_MAX_C3_LATENCY 1000
27
28#define ACPI_PROCESSOR_MAX_THROTTLING 16
29#define ACPI_PROCESSOR_MAX_THROTTLE 250 /* 25% */
30#define ACPI_PROCESSOR_MAX_DUTY_WIDTH 4
31
32#define ACPI_PDC_REVISION_ID 0x1
33
34#define ACPI_PSD_REV0_REVISION 0 /* Support for _PSD as in ACPI 3.0 */
35#define ACPI_PSD_REV0_ENTRIES 5
36
37#define ACPI_TSD_REV0_REVISION 0 /* Support for _PSD as in ACPI 3.0 */
38#define ACPI_TSD_REV0_ENTRIES 5
39/*
40 * Types of coordination defined in ACPI 3.0. Same macros can be used across
41 * P, C and T states
42 */
43#define DOMAIN_COORD_TYPE_SW_ALL 0xfc
44#define DOMAIN_COORD_TYPE_SW_ANY 0xfd
45#define DOMAIN_COORD_TYPE_HW_ALL 0xfe
46
47#define ACPI_CSTATE_SYSTEMIO 0
48#define ACPI_CSTATE_FFH 1
49#define ACPI_CSTATE_HALT 2
50#define ACPI_CSTATE_INTEGER 3
51
52#define ACPI_CX_DESC_LEN 32
53
54/* Power Management */
55
56struct acpi_processor_cx;
57
58struct acpi_power_register {
59 u8 descriptor;
60 u16 length;
61 u8 space_id;
62 u8 bit_width;
63 u8 bit_offset;
64 u8 access_size;
65 u64 address;
66} __packed;
67
68struct acpi_processor_cx {
69 u8 valid;
70 u8 type;
71 u32 address;
72 u8 entry_method;
73 u8 index;
74 u32 latency;
75 u8 bm_sts_skip;
76 char desc[ACPI_CX_DESC_LEN];
77};
78
79struct acpi_lpi_state {
80 u32 min_residency;
81 u32 wake_latency; /* worst case */
82 u32 flags;
83 u32 arch_flags;
84 u32 res_cnt_freq;
85 u32 enable_parent_state;
86 u64 address;
87 u8 index;
88 u8 entry_method;
89 char desc[ACPI_CX_DESC_LEN];
90};
91
92struct acpi_processor_power {
93 int count;
94 union {
95 struct acpi_processor_cx states[ACPI_PROCESSOR_MAX_POWER];
96 struct acpi_lpi_state lpi_states[ACPI_PROCESSOR_MAX_POWER];
97 };
98 int timer_broadcast_on_state;
99};
100
101/* Performance Management */
102
103struct acpi_psd_package {
104 u64 num_entries;
105 u64 revision;
106 u64 domain;
107 u64 coord_type;
108 u64 num_processors;
109} __packed;
110
111struct acpi_pct_register {
112 u8 descriptor;
113 u16 length;
114 u8 space_id;
115 u8 bit_width;
116 u8 bit_offset;
117 u8 reserved;
118 u64 address;
119} __packed;
120
121struct acpi_processor_px {
122 u64 core_frequency; /* megahertz */
123 u64 power; /* milliWatts */
124 u64 transition_latency; /* microseconds */
125 u64 bus_master_latency; /* microseconds */
126 u64 control; /* control value */
127 u64 status; /* success indicator */
128};
129
130struct acpi_processor_performance {
131 unsigned int state;
132 unsigned int platform_limit;
133 struct acpi_pct_register control_register;
134 struct acpi_pct_register status_register;
135 unsigned int state_count;
136 struct acpi_processor_px *states;
137 struct acpi_psd_package domain_info;
138 cpumask_var_t shared_cpu_map;
139 unsigned int shared_type;
140};
141
142/* Throttling Control */
143
144struct acpi_tsd_package {
145 u64 num_entries;
146 u64 revision;
147 u64 domain;
148 u64 coord_type;
149 u64 num_processors;
150} __packed;
151
152struct acpi_ptc_register {
153 u8 descriptor;
154 u16 length;
155 u8 space_id;
156 u8 bit_width;
157 u8 bit_offset;
158 u8 reserved;
159 u64 address;
160} __packed;
161
162struct acpi_processor_tx_tss {
163 u64 freqpercentage; /* */
164 u64 power; /* milliWatts */
165 u64 transition_latency; /* microseconds */
166 u64 control; /* control value */
167 u64 status; /* success indicator */
168};
169struct acpi_processor_tx {
170 u16 power;
171 u16 performance;
172};
173
174struct acpi_processor;
175struct acpi_processor_throttling {
176 unsigned int state;
177 unsigned int platform_limit;
178 struct acpi_pct_register control_register;
179 struct acpi_pct_register status_register;
180 unsigned int state_count;
181 struct acpi_processor_tx_tss *states_tss;
182 struct acpi_tsd_package domain_info;
183 cpumask_var_t shared_cpu_map;
184 int (*acpi_processor_get_throttling) (struct acpi_processor * pr);
185 int (*acpi_processor_set_throttling) (struct acpi_processor * pr,
186 int state, bool force);
187
188 u32 address;
189 u8 duty_offset;
190 u8 duty_width;
191 u8 tsd_valid_flag;
192 unsigned int shared_type;
193 struct acpi_processor_tx states[ACPI_PROCESSOR_MAX_THROTTLING];
194};
195
196/* Limit Interface */
197
198struct acpi_processor_lx {
199 int px; /* performance state */
200 int tx; /* throttle level */
201};
202
203struct acpi_processor_limit {
204 struct acpi_processor_lx state; /* current limit */
205 struct acpi_processor_lx thermal; /* thermal limit */
206 struct acpi_processor_lx user; /* user limit */
207};
208
209struct acpi_processor_flags {
210 u8 power:1;
211 u8 performance:1;
212 u8 throttling:1;
213 u8 limit:1;
214 u8 bm_control:1;
215 u8 bm_check:1;
216 u8 has_cst:1;
217 u8 has_lpi:1;
218 u8 power_setup_done:1;
219 u8 bm_rld_set:1;
220 u8 need_hotplug_init:1;
221};
222
223struct acpi_processor {
224 acpi_handle handle;
225 u32 acpi_id;
226 phys_cpuid_t phys_id; /* CPU hardware ID such as APIC ID for x86 */
227 u32 id; /* CPU logical ID allocated by OS */
228 u32 pblk;
229 int performance_platform_limit;
230 int throttling_platform_limit;
231 /* 0 - states 0..n-th state available */
232
233 struct acpi_processor_flags flags;
234 struct acpi_processor_power power;
235 struct acpi_processor_performance *performance;
236 struct acpi_processor_throttling throttling;
237 struct acpi_processor_limit limit;
238 struct thermal_cooling_device *cdev;
239 struct device *dev; /* Processor device. */
240 struct freq_qos_request perflib_req;
241 struct freq_qos_request thermal_req;
242};
243
244struct acpi_processor_errata {
245 u8 smp;
246 struct {
247 u8 throttle:1;
248 u8 fdma:1;
249 u8 reserved:6;
250 u32 bmisx;
251 } piix4;
252};
253
254extern int acpi_processor_preregister_performance(struct
255 acpi_processor_performance
256 __percpu *performance);
257
258extern int acpi_processor_register_performance(struct acpi_processor_performance
259 *performance, unsigned int cpu);
260extern void acpi_processor_unregister_performance(unsigned int cpu);
261
262int acpi_processor_pstate_control(void);
263/* note: this locks both the calling module and the processor module
264 if a _PPC object exists, rmmod is disallowed then */
265int acpi_processor_notify_smm(struct module *calling_module);
266int acpi_processor_get_psd(acpi_handle handle,
267 struct acpi_psd_package *pdomain);
268
269/* parsing the _P* objects. */
270extern int acpi_processor_get_performance_info(struct acpi_processor *pr);
271
272/* for communication between multiple parts of the processor kernel module */
273DECLARE_PER_CPU(struct acpi_processor *, processors);
274extern struct acpi_processor_errata errata;
275
276#if defined(ARCH_HAS_POWER_INIT) && defined(CONFIG_ACPI_PROCESSOR_CSTATE)
277void acpi_processor_power_init_bm_check(struct acpi_processor_flags *flags,
278 unsigned int cpu);
279int acpi_processor_ffh_cstate_probe(unsigned int cpu,
280 struct acpi_processor_cx *cx,
281 struct acpi_power_register *reg);
282void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx *cstate);
283#else
284static inline void acpi_processor_power_init_bm_check(struct
285 acpi_processor_flags
286 *flags, unsigned int cpu)
287{
288 flags->bm_check = 1;
289 return;
290}
291static inline int acpi_processor_ffh_cstate_probe(unsigned int cpu,
292 struct acpi_processor_cx *cx,
293 struct acpi_power_register
294 *reg)
295{
296 return -1;
297}
298static inline void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx
299 *cstate)
300{
301 return;
302}
303#endif
304
305static inline int call_on_cpu(int cpu, long (*fn)(void *), void *arg,
306 bool direct)
307{
308 if (direct || (is_percpu_thread() && cpu == smp_processor_id()))
309 return fn(arg);
310 return work_on_cpu(cpu, fn, arg);
311}
312
313/* in processor_perflib.c */
314
315#ifdef CONFIG_CPU_FREQ
316extern bool acpi_processor_cpufreq_init;
317void acpi_processor_ignore_ppc_init(void);
318void acpi_processor_ppc_init(struct cpufreq_policy *policy);
319void acpi_processor_ppc_exit(struct cpufreq_policy *policy);
320void acpi_processor_ppc_has_changed(struct acpi_processor *pr, int event_flag);
321extern int acpi_processor_get_bios_limit(int cpu, unsigned int *limit);
322#else
323static inline void acpi_processor_ignore_ppc_init(void)
324{
325 return;
326}
327static inline void acpi_processor_ppc_init(struct cpufreq_policy *policy)
328{
329 return;
330}
331static inline void acpi_processor_ppc_exit(struct cpufreq_policy *policy)
332{
333 return;
334}
335static inline void acpi_processor_ppc_has_changed(struct acpi_processor *pr,
336 int event_flag)
337{
338 static unsigned int printout = 1;
339 if (printout) {
340 printk(KERN_WARNING
341 "Warning: Processor Platform Limit event detected, but not handled.\n");
342 printk(KERN_WARNING
343 "Consider compiling CPUfreq support into your kernel.\n");
344 printout = 0;
345 }
346}
347static inline int acpi_processor_get_bios_limit(int cpu, unsigned int *limit)
348{
349 return -ENODEV;
350}
351
352#endif /* CONFIG_CPU_FREQ */
353
354/* in processor_core.c */
355phys_cpuid_t acpi_get_phys_id(acpi_handle, int type, u32 acpi_id);
356phys_cpuid_t acpi_map_madt_entry(u32 acpi_id);
357int acpi_map_cpuid(phys_cpuid_t phys_id, u32 acpi_id);
358int acpi_get_cpuid(acpi_handle, int type, u32 acpi_id);
359
360#ifdef CONFIG_ACPI_CPPC_LIB
361extern int acpi_cppc_processor_probe(struct acpi_processor *pr);
362extern void acpi_cppc_processor_exit(struct acpi_processor *pr);
363#else
364static inline int acpi_cppc_processor_probe(struct acpi_processor *pr)
365{
366 return 0;
367}
368static inline void acpi_cppc_processor_exit(struct acpi_processor *pr)
369{
370 return;
371}
372#endif /* CONFIG_ACPI_CPPC_LIB */
373
374/* in processor_pdc.c */
375void acpi_processor_set_pdc(acpi_handle handle);
376
377/* in processor_throttling.c */
378#ifdef CONFIG_ACPI_CPU_FREQ_PSS
379int acpi_processor_tstate_has_changed(struct acpi_processor *pr);
380int acpi_processor_get_throttling_info(struct acpi_processor *pr);
381extern int acpi_processor_set_throttling(struct acpi_processor *pr,
382 int state, bool force);
383/*
384 * Reevaluate whether the T-state is invalid after one cpu is
385 * onlined/offlined. In such case the flags.throttling will be updated.
386 */
387extern void acpi_processor_reevaluate_tstate(struct acpi_processor *pr,
388 bool is_dead);
389extern const struct file_operations acpi_processor_throttling_fops;
390extern void acpi_processor_throttling_init(void);
391#else
392static inline int acpi_processor_tstate_has_changed(struct acpi_processor *pr)
393{
394 return 0;
395}
396
397static inline int acpi_processor_get_throttling_info(struct acpi_processor *pr)
398{
399 return -ENODEV;
400}
401
402static inline int acpi_processor_set_throttling(struct acpi_processor *pr,
403 int state, bool force)
404{
405 return -ENODEV;
406}
407
408static inline void acpi_processor_reevaluate_tstate(struct acpi_processor *pr,
409 bool is_dead) {}
410
411static inline void acpi_processor_throttling_init(void) {}
412#endif /* CONFIG_ACPI_CPU_FREQ_PSS */
413
414/* in processor_idle.c */
415extern struct cpuidle_driver acpi_idle_driver;
416#ifdef CONFIG_ACPI_PROCESSOR_IDLE
417int acpi_processor_power_init(struct acpi_processor *pr);
418int acpi_processor_power_exit(struct acpi_processor *pr);
419int acpi_processor_power_state_has_changed(struct acpi_processor *pr);
420int acpi_processor_hotplug(struct acpi_processor *pr);
421#else
422static inline int acpi_processor_power_init(struct acpi_processor *pr)
423{
424 return -ENODEV;
425}
426
427static inline int acpi_processor_power_exit(struct acpi_processor *pr)
428{
429 return -ENODEV;
430}
431
432static inline int acpi_processor_power_state_has_changed(struct acpi_processor *pr)
433{
434 return -ENODEV;
435}
436
437static inline int acpi_processor_hotplug(struct acpi_processor *pr)
438{
439 return -ENODEV;
440}
441#endif /* CONFIG_ACPI_PROCESSOR_IDLE */
442
443/* in processor_thermal.c */
444int acpi_processor_thermal_init(struct acpi_processor *pr,
445 struct acpi_device *device);
446void acpi_processor_thermal_exit(struct acpi_processor *pr,
447 struct acpi_device *device);
448extern const struct thermal_cooling_device_ops processor_cooling_ops;
449#ifdef CONFIG_CPU_FREQ
450void acpi_thermal_cpufreq_init(struct cpufreq_policy *policy);
451void acpi_thermal_cpufreq_exit(struct cpufreq_policy *policy);
452#else
453static inline void acpi_thermal_cpufreq_init(struct cpufreq_policy *policy)
454{
455 return;
456}
457static inline void acpi_thermal_cpufreq_exit(struct cpufreq_policy *policy)
458{
459 return;
460}
461#endif /* CONFIG_CPU_FREQ */
462
463#ifdef CONFIG_ACPI_PROCESSOR_IDLE
464extern int acpi_processor_ffh_lpi_probe(unsigned int cpu);
465extern int acpi_processor_ffh_lpi_enter(struct acpi_lpi_state *lpi);
466#endif
467
468#endif
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __ACPI_PROCESSOR_H
3#define __ACPI_PROCESSOR_H
4
5#include <linux/kernel.h>
6#include <linux/cpu.h>
7#include <linux/thermal.h>
8#include <asm/acpi.h>
9
10#define ACPI_PROCESSOR_CLASS "processor"
11#define ACPI_PROCESSOR_DEVICE_NAME "Processor"
12#define ACPI_PROCESSOR_DEVICE_HID "ACPI0007"
13#define ACPI_PROCESSOR_CONTAINER_HID "ACPI0010"
14
15#define ACPI_PROCESSOR_BUSY_METRIC 10
16
17#define ACPI_PROCESSOR_MAX_POWER 8
18#define ACPI_PROCESSOR_MAX_C2_LATENCY 100
19#define ACPI_PROCESSOR_MAX_C3_LATENCY 1000
20
21#define ACPI_PROCESSOR_MAX_THROTTLING 16
22#define ACPI_PROCESSOR_MAX_THROTTLE 250 /* 25% */
23#define ACPI_PROCESSOR_MAX_DUTY_WIDTH 4
24
25#define ACPI_PDC_REVISION_ID 0x1
26
27#define ACPI_PSD_REV0_REVISION 0 /* Support for _PSD as in ACPI 3.0 */
28#define ACPI_PSD_REV0_ENTRIES 5
29
30#define ACPI_TSD_REV0_REVISION 0 /* Support for _PSD as in ACPI 3.0 */
31#define ACPI_TSD_REV0_ENTRIES 5
32/*
33 * Types of coordination defined in ACPI 3.0. Same macros can be used across
34 * P, C and T states
35 */
36#define DOMAIN_COORD_TYPE_SW_ALL 0xfc
37#define DOMAIN_COORD_TYPE_SW_ANY 0xfd
38#define DOMAIN_COORD_TYPE_HW_ALL 0xfe
39
40#define ACPI_CSTATE_SYSTEMIO 0
41#define ACPI_CSTATE_FFH 1
42#define ACPI_CSTATE_HALT 2
43#define ACPI_CSTATE_INTEGER 3
44
45#define ACPI_CX_DESC_LEN 32
46
47/* Power Management */
48
49struct acpi_processor_cx;
50
51struct acpi_power_register {
52 u8 descriptor;
53 u16 length;
54 u8 space_id;
55 u8 bit_width;
56 u8 bit_offset;
57 u8 access_size;
58 u64 address;
59} __packed;
60
61struct acpi_processor_cx {
62 u8 valid;
63 u8 type;
64 u32 address;
65 u8 entry_method;
66 u8 index;
67 u32 latency;
68 u8 bm_sts_skip;
69 char desc[ACPI_CX_DESC_LEN];
70};
71
72struct acpi_lpi_state {
73 u32 min_residency;
74 u32 wake_latency; /* worst case */
75 u32 flags;
76 u32 arch_flags;
77 u32 res_cnt_freq;
78 u32 enable_parent_state;
79 u64 address;
80 u8 index;
81 u8 entry_method;
82 char desc[ACPI_CX_DESC_LEN];
83};
84
85struct acpi_processor_power {
86 int count;
87 union {
88 struct acpi_processor_cx states[ACPI_PROCESSOR_MAX_POWER];
89 struct acpi_lpi_state lpi_states[ACPI_PROCESSOR_MAX_POWER];
90 };
91 int timer_broadcast_on_state;
92};
93
94/* Performance Management */
95
96struct acpi_psd_package {
97 u64 num_entries;
98 u64 revision;
99 u64 domain;
100 u64 coord_type;
101 u64 num_processors;
102} __packed;
103
104struct acpi_pct_register {
105 u8 descriptor;
106 u16 length;
107 u8 space_id;
108 u8 bit_width;
109 u8 bit_offset;
110 u8 reserved;
111 u64 address;
112} __packed;
113
114struct acpi_processor_px {
115 u64 core_frequency; /* megahertz */
116 u64 power; /* milliWatts */
117 u64 transition_latency; /* microseconds */
118 u64 bus_master_latency; /* microseconds */
119 u64 control; /* control value */
120 u64 status; /* success indicator */
121};
122
123struct acpi_processor_performance {
124 unsigned int state;
125 unsigned int platform_limit;
126 struct acpi_pct_register control_register;
127 struct acpi_pct_register status_register;
128 unsigned int state_count;
129 struct acpi_processor_px *states;
130 struct acpi_psd_package domain_info;
131 cpumask_var_t shared_cpu_map;
132 unsigned int shared_type;
133};
134
135/* Throttling Control */
136
137struct acpi_tsd_package {
138 u64 num_entries;
139 u64 revision;
140 u64 domain;
141 u64 coord_type;
142 u64 num_processors;
143} __packed;
144
145struct acpi_ptc_register {
146 u8 descriptor;
147 u16 length;
148 u8 space_id;
149 u8 bit_width;
150 u8 bit_offset;
151 u8 reserved;
152 u64 address;
153} __packed;
154
155struct acpi_processor_tx_tss {
156 u64 freqpercentage; /* */
157 u64 power; /* milliWatts */
158 u64 transition_latency; /* microseconds */
159 u64 control; /* control value */
160 u64 status; /* success indicator */
161};
162struct acpi_processor_tx {
163 u16 power;
164 u16 performance;
165};
166
167struct acpi_processor;
168struct acpi_processor_throttling {
169 unsigned int state;
170 unsigned int platform_limit;
171 struct acpi_pct_register control_register;
172 struct acpi_pct_register status_register;
173 unsigned int state_count;
174 struct acpi_processor_tx_tss *states_tss;
175 struct acpi_tsd_package domain_info;
176 cpumask_var_t shared_cpu_map;
177 int (*acpi_processor_get_throttling) (struct acpi_processor * pr);
178 int (*acpi_processor_set_throttling) (struct acpi_processor * pr,
179 int state, bool force);
180
181 u32 address;
182 u8 duty_offset;
183 u8 duty_width;
184 u8 tsd_valid_flag;
185 unsigned int shared_type;
186 struct acpi_processor_tx states[ACPI_PROCESSOR_MAX_THROTTLING];
187};
188
189/* Limit Interface */
190
191struct acpi_processor_lx {
192 int px; /* performance state */
193 int tx; /* throttle level */
194};
195
196struct acpi_processor_limit {
197 struct acpi_processor_lx state; /* current limit */
198 struct acpi_processor_lx thermal; /* thermal limit */
199 struct acpi_processor_lx user; /* user limit */
200};
201
202struct acpi_processor_flags {
203 u8 power:1;
204 u8 performance:1;
205 u8 throttling:1;
206 u8 limit:1;
207 u8 bm_control:1;
208 u8 bm_check:1;
209 u8 has_cst:1;
210 u8 has_lpi:1;
211 u8 power_setup_done:1;
212 u8 bm_rld_set:1;
213 u8 need_hotplug_init:1;
214};
215
216struct acpi_processor {
217 acpi_handle handle;
218 u32 acpi_id;
219 phys_cpuid_t phys_id; /* CPU hardware ID such as APIC ID for x86 */
220 u32 id; /* CPU logical ID allocated by OS */
221 u32 pblk;
222 int performance_platform_limit;
223 int throttling_platform_limit;
224 /* 0 - states 0..n-th state available */
225
226 struct acpi_processor_flags flags;
227 struct acpi_processor_power power;
228 struct acpi_processor_performance *performance;
229 struct acpi_processor_throttling throttling;
230 struct acpi_processor_limit limit;
231 struct thermal_cooling_device *cdev;
232 struct device *dev; /* Processor device. */
233};
234
235struct acpi_processor_errata {
236 u8 smp;
237 struct {
238 u8 throttle:1;
239 u8 fdma:1;
240 u8 reserved:6;
241 u32 bmisx;
242 } piix4;
243};
244
245extern int acpi_processor_preregister_performance(struct
246 acpi_processor_performance
247 __percpu *performance);
248
249extern int acpi_processor_register_performance(struct acpi_processor_performance
250 *performance, unsigned int cpu);
251extern void acpi_processor_unregister_performance(unsigned int cpu);
252
253int acpi_processor_pstate_control(void);
254/* note: this locks both the calling module and the processor module
255 if a _PPC object exists, rmmod is disallowed then */
256int acpi_processor_notify_smm(struct module *calling_module);
257int acpi_processor_get_psd(acpi_handle handle,
258 struct acpi_psd_package *pdomain);
259
260/* parsing the _P* objects. */
261extern int acpi_processor_get_performance_info(struct acpi_processor *pr);
262
263/* for communication between multiple parts of the processor kernel module */
264DECLARE_PER_CPU(struct acpi_processor *, processors);
265extern struct acpi_processor_errata errata;
266
267#if defined(ARCH_HAS_POWER_INIT) && defined(CONFIG_ACPI_PROCESSOR_CSTATE)
268void acpi_processor_power_init_bm_check(struct acpi_processor_flags *flags,
269 unsigned int cpu);
270int acpi_processor_ffh_cstate_probe(unsigned int cpu,
271 struct acpi_processor_cx *cx,
272 struct acpi_power_register *reg);
273void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx *cstate);
274#else
275static inline void acpi_processor_power_init_bm_check(struct
276 acpi_processor_flags
277 *flags, unsigned int cpu)
278{
279 flags->bm_check = 1;
280 return;
281}
282static inline int acpi_processor_ffh_cstate_probe(unsigned int cpu,
283 struct acpi_processor_cx *cx,
284 struct acpi_power_register
285 *reg)
286{
287 return -1;
288}
289static inline void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx
290 *cstate)
291{
292 return;
293}
294#endif
295
296/* in processor_perflib.c */
297
298#ifdef CONFIG_CPU_FREQ
299void acpi_processor_ppc_init(void);
300void acpi_processor_ppc_exit(void);
301void acpi_processor_ppc_has_changed(struct acpi_processor *pr, int event_flag);
302extern int acpi_processor_get_bios_limit(int cpu, unsigned int *limit);
303#else
304static inline void acpi_processor_ppc_init(void)
305{
306 return;
307}
308static inline void acpi_processor_ppc_exit(void)
309{
310 return;
311}
312static inline int acpi_processor_ppc_has_changed(struct acpi_processor *pr,
313 int event_flag)
314{
315 static unsigned int printout = 1;
316 if (printout) {
317 printk(KERN_WARNING
318 "Warning: Processor Platform Limit event detected, but not handled.\n");
319 printk(KERN_WARNING
320 "Consider compiling CPUfreq support into your kernel.\n");
321 printout = 0;
322 }
323 return 0;
324}
325static inline int acpi_processor_get_bios_limit(int cpu, unsigned int *limit)
326{
327 return -ENODEV;
328}
329
330#endif /* CONFIG_CPU_FREQ */
331
332/* in processor_core.c */
333phys_cpuid_t acpi_get_phys_id(acpi_handle, int type, u32 acpi_id);
334phys_cpuid_t acpi_map_madt_entry(u32 acpi_id);
335int acpi_map_cpuid(phys_cpuid_t phys_id, u32 acpi_id);
336int acpi_get_cpuid(acpi_handle, int type, u32 acpi_id);
337
338#ifdef CONFIG_ACPI_CPPC_LIB
339extern int acpi_cppc_processor_probe(struct acpi_processor *pr);
340extern void acpi_cppc_processor_exit(struct acpi_processor *pr);
341#else
342static inline int acpi_cppc_processor_probe(struct acpi_processor *pr)
343{
344 return 0;
345}
346static inline void acpi_cppc_processor_exit(struct acpi_processor *pr)
347{
348 return;
349}
350#endif /* CONFIG_ACPI_CPPC_LIB */
351
352/* in processor_pdc.c */
353void acpi_processor_set_pdc(acpi_handle handle);
354
355/* in processor_throttling.c */
356#ifdef CONFIG_ACPI_CPU_FREQ_PSS
357int acpi_processor_tstate_has_changed(struct acpi_processor *pr);
358int acpi_processor_get_throttling_info(struct acpi_processor *pr);
359extern int acpi_processor_set_throttling(struct acpi_processor *pr,
360 int state, bool force);
361/*
362 * Reevaluate whether the T-state is invalid after one cpu is
363 * onlined/offlined. In such case the flags.throttling will be updated.
364 */
365extern void acpi_processor_reevaluate_tstate(struct acpi_processor *pr,
366 bool is_dead);
367extern const struct file_operations acpi_processor_throttling_fops;
368extern void acpi_processor_throttling_init(void);
369#else
370static inline int acpi_processor_tstate_has_changed(struct acpi_processor *pr)
371{
372 return 0;
373}
374
375static inline int acpi_processor_get_throttling_info(struct acpi_processor *pr)
376{
377 return -ENODEV;
378}
379
380static inline int acpi_processor_set_throttling(struct acpi_processor *pr,
381 int state, bool force)
382{
383 return -ENODEV;
384}
385
386static inline void acpi_processor_reevaluate_tstate(struct acpi_processor *pr,
387 bool is_dead) {}
388
389static inline void acpi_processor_throttling_init(void) {}
390#endif /* CONFIG_ACPI_CPU_FREQ_PSS */
391
392/* in processor_idle.c */
393extern struct cpuidle_driver acpi_idle_driver;
394#ifdef CONFIG_ACPI_PROCESSOR_IDLE
395int acpi_processor_power_init(struct acpi_processor *pr);
396int acpi_processor_power_exit(struct acpi_processor *pr);
397int acpi_processor_power_state_has_changed(struct acpi_processor *pr);
398int acpi_processor_hotplug(struct acpi_processor *pr);
399#else
400static inline int acpi_processor_power_init(struct acpi_processor *pr)
401{
402 return -ENODEV;
403}
404
405static inline int acpi_processor_power_exit(struct acpi_processor *pr)
406{
407 return -ENODEV;
408}
409
410static inline int acpi_processor_power_state_has_changed(struct acpi_processor *pr)
411{
412 return -ENODEV;
413}
414
415static inline int acpi_processor_hotplug(struct acpi_processor *pr)
416{
417 return -ENODEV;
418}
419#endif /* CONFIG_ACPI_PROCESSOR_IDLE */
420
421/* in processor_thermal.c */
422int acpi_processor_get_limit_info(struct acpi_processor *pr);
423extern const struct thermal_cooling_device_ops processor_cooling_ops;
424#if defined(CONFIG_ACPI_CPU_FREQ_PSS) & defined(CONFIG_CPU_FREQ)
425void acpi_thermal_cpufreq_init(void);
426void acpi_thermal_cpufreq_exit(void);
427#else
428static inline void acpi_thermal_cpufreq_init(void)
429{
430 return;
431}
432static inline void acpi_thermal_cpufreq_exit(void)
433{
434 return;
435}
436#endif /* CONFIG_ACPI_CPU_FREQ_PSS */
437
438#endif