1 #ifndef __ACPI_PROCESSOR_H
2 #define __ACPI_PROCESSOR_H
4 #include <linux/kernel.h>
6 #include <linux/cpuidle.h>
10 #define ACPI_PROCESSOR_BUSY_METRIC 10
12 #define ACPI_PROCESSOR_MAX_POWER 8
13 #define ACPI_PROCESSOR_MAX_C2_LATENCY 100
14 #define ACPI_PROCESSOR_MAX_C3_LATENCY 1000
16 #define ACPI_PROCESSOR_MAX_THROTTLING 16
17 #define ACPI_PROCESSOR_MAX_THROTTLE 250 /* 25% */
18 #define ACPI_PROCESSOR_MAX_DUTY_WIDTH 4
20 #define ACPI_PDC_REVISION_ID 0x1
22 #define ACPI_PSD_REV0_REVISION 0 /* Support for _PSD as in ACPI 3.0 */
23 #define ACPI_PSD_REV0_ENTRIES 5
25 #define ACPI_TSD_REV0_REVISION 0 /* Support for _PSD as in ACPI 3.0 */
26 #define ACPI_TSD_REV0_ENTRIES 5
28 * Types of coordination defined in ACPI 3.0. Same macros can be used across
31 #define DOMAIN_COORD_TYPE_SW_ALL 0xfc
32 #define DOMAIN_COORD_TYPE_SW_ANY 0xfd
33 #define DOMAIN_COORD_TYPE_HW_ALL 0xfe
35 #define ACPI_CSTATE_SYSTEMIO (0)
36 #define ACPI_CSTATE_FFH (1)
38 /* Power Management */
40 struct acpi_processor_cx;
42 struct acpi_power_register {
50 } __attribute__ ((packed));
52 struct acpi_processor_cx_policy {
54 struct acpi_processor_cx *state;
63 struct acpi_processor_cx {
74 struct acpi_processor_cx_policy promotion;
75 struct acpi_processor_cx_policy demotion;
78 struct acpi_processor_power {
79 struct cpuidle_device dev;
80 struct acpi_processor_cx *state;
81 unsigned long bm_check_timestamp;
85 struct acpi_processor_cx states[ACPI_PROCESSOR_MAX_POWER];
86 int timer_broadcast_on_state;
89 /* Performance Management */
91 struct acpi_psd_package {
92 acpi_integer num_entries;
93 acpi_integer revision;
95 acpi_integer coord_type;
96 acpi_integer num_processors;
97 } __attribute__ ((packed));
99 struct acpi_pct_register {
107 } __attribute__ ((packed));
109 struct acpi_processor_px {
110 acpi_integer core_frequency; /* megahertz */
111 acpi_integer power; /* milliWatts */
112 acpi_integer transition_latency; /* microseconds */
113 acpi_integer bus_master_latency; /* microseconds */
114 acpi_integer control; /* control value */
115 acpi_integer status; /* success indicator */
118 struct acpi_processor_performance {
120 unsigned int platform_limit;
121 struct acpi_pct_register control_register;
122 struct acpi_pct_register status_register;
123 unsigned int state_count;
124 struct acpi_processor_px *states;
125 struct acpi_psd_package domain_info;
126 cpumask_t shared_cpu_map;
127 unsigned int shared_type;
130 /* Throttling Control */
132 struct acpi_tsd_package {
133 acpi_integer num_entries;
134 acpi_integer revision;
136 acpi_integer coord_type;
137 acpi_integer num_processors;
138 } __attribute__ ((packed));
140 struct acpi_ptc_register {
148 } __attribute__ ((packed));
150 struct acpi_processor_tx_tss {
151 acpi_integer freqpercentage; /* */
152 acpi_integer power; /* milliWatts */
153 acpi_integer transition_latency; /* microseconds */
154 acpi_integer control; /* control value */
155 acpi_integer status; /* success indicator */
157 struct acpi_processor_tx {
162 struct acpi_processor;
163 struct acpi_processor_throttling {
165 unsigned int platform_limit;
166 struct acpi_pct_register control_register;
167 struct acpi_pct_register status_register;
168 unsigned int state_count;
169 struct acpi_processor_tx_tss *states_tss;
170 struct acpi_tsd_package domain_info;
171 cpumask_t shared_cpu_map;
172 int (*acpi_processor_get_throttling) (struct acpi_processor * pr);
173 int (*acpi_processor_set_throttling) (struct acpi_processor * pr,
179 struct acpi_processor_tx states[ACPI_PROCESSOR_MAX_THROTTLING];
182 /* Limit Interface */
184 struct acpi_processor_lx {
185 int px; /* performace state */
186 int tx; /* throttle level */
189 struct acpi_processor_limit {
190 struct acpi_processor_lx state; /* current limit */
191 struct acpi_processor_lx thermal; /* thermal limit */
192 struct acpi_processor_lx user; /* user limit */
195 struct acpi_processor_flags {
203 u8 power_setup_done:1;
207 struct acpi_processor {
212 int performance_platform_limit;
213 int throttling_platform_limit;
214 /* 0 - states 0..n-th state available */
216 struct acpi_processor_flags flags;
217 struct acpi_processor_power power;
218 struct acpi_processor_performance *performance;
219 struct acpi_processor_throttling throttling;
220 struct acpi_processor_limit limit;
222 /* the _PDC objects for this processor, if any */
223 struct acpi_object_list *pdc;
226 struct acpi_processor_errata {
236 extern int acpi_processor_preregister_performance(struct
237 acpi_processor_performance
240 extern int acpi_processor_register_performance(struct acpi_processor_performance
241 *performance, unsigned int cpu);
242 extern void acpi_processor_unregister_performance(struct
243 acpi_processor_performance
247 /* note: this locks both the calling module and the processor module
248 if a _PPC object exists, rmmod is disallowed then */
249 int acpi_processor_notify_smm(struct module *calling_module);
251 /* for communication between multiple parts of the processor kernel module */
252 extern struct acpi_processor *processors[NR_CPUS];
253 extern struct acpi_processor_errata errata;
255 void arch_acpi_processor_init_pdc(struct acpi_processor *pr);
257 #ifdef ARCH_HAS_POWER_INIT
258 void acpi_processor_power_init_bm_check(struct acpi_processor_flags *flags,
260 int acpi_processor_ffh_cstate_probe(unsigned int cpu,
261 struct acpi_processor_cx *cx,
262 struct acpi_power_register *reg);
263 void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx *cstate);
265 static inline void acpi_processor_power_init_bm_check(struct
267 *flags, unsigned int cpu)
272 static inline int acpi_processor_ffh_cstate_probe(unsigned int cpu,
273 struct acpi_processor_cx *cx,
274 struct acpi_power_register
279 static inline void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx
286 /* in processor_perflib.c */
288 #ifdef CONFIG_CPU_FREQ
289 void acpi_processor_ppc_init(void);
290 void acpi_processor_ppc_exit(void);
291 int acpi_processor_ppc_has_changed(struct acpi_processor *pr);
293 static inline void acpi_processor_ppc_init(void)
297 static inline void acpi_processor_ppc_exit(void)
301 static inline int acpi_processor_ppc_has_changed(struct acpi_processor *pr)
303 static unsigned int printout = 1;
306 "Warning: Processor Platform Limit event detected, but not handled.\n");
308 "Consider compiling CPUfreq support into your kernel.\n");
313 #endif /* CONFIG_CPU_FREQ */
315 /* in processor_throttling.c */
316 int acpi_processor_get_throttling_info(struct acpi_processor *pr);
317 extern int acpi_processor_set_throttling(struct acpi_processor *pr, int state);
318 extern struct file_operations acpi_processor_throttling_fops;
320 /* in processor_idle.c */
321 int acpi_processor_power_init(struct acpi_processor *pr,
322 struct acpi_device *device);
323 int acpi_processor_cst_has_changed(struct acpi_processor *pr);
324 int acpi_processor_power_exit(struct acpi_processor *pr,
325 struct acpi_device *device);
326 int acpi_processor_suspend(struct acpi_device * device, pm_message_t state);
327 int acpi_processor_resume(struct acpi_device * device);
328 extern struct cpuidle_driver acpi_idle_driver;
330 /* in processor_thermal.c */
331 int acpi_processor_get_limit_info(struct acpi_processor *pr);
332 extern struct file_operations acpi_processor_limit_fops;
334 #ifdef CONFIG_CPU_FREQ
335 void acpi_thermal_cpufreq_init(void);
336 void acpi_thermal_cpufreq_exit(void);
338 static inline void acpi_thermal_cpufreq_init(void)
342 static inline void acpi_thermal_cpufreq_exit(void)