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 struct acpi_processor_cx *bm_state;
82 unsigned long bm_check_timestamp;
86 struct acpi_processor_cx states[ACPI_PROCESSOR_MAX_POWER];
87 int timer_broadcast_on_state;
90 /* Performance Management */
92 struct acpi_psd_package {
93 acpi_integer num_entries;
94 acpi_integer revision;
96 acpi_integer coord_type;
97 acpi_integer num_processors;
98 } __attribute__ ((packed));
100 struct acpi_pct_register {
108 } __attribute__ ((packed));
110 struct acpi_processor_px {
111 acpi_integer core_frequency; /* megahertz */
112 acpi_integer power; /* milliWatts */
113 acpi_integer transition_latency; /* microseconds */
114 acpi_integer bus_master_latency; /* microseconds */
115 acpi_integer control; /* control value */
116 acpi_integer status; /* success indicator */
119 struct acpi_processor_performance {
121 unsigned int platform_limit;
122 struct acpi_pct_register control_register;
123 struct acpi_pct_register status_register;
124 unsigned int state_count;
125 struct acpi_processor_px *states;
126 struct acpi_psd_package domain_info;
127 cpumask_t shared_cpu_map;
128 unsigned int shared_type;
131 /* Throttling Control */
133 struct acpi_tsd_package {
134 acpi_integer num_entries;
135 acpi_integer revision;
137 acpi_integer coord_type;
138 acpi_integer num_processors;
139 } __attribute__ ((packed));
141 struct acpi_ptc_register {
149 } __attribute__ ((packed));
151 struct acpi_processor_tx_tss {
152 acpi_integer freqpercentage; /* */
153 acpi_integer power; /* milliWatts */
154 acpi_integer transition_latency; /* microseconds */
155 acpi_integer control; /* control value */
156 acpi_integer status; /* success indicator */
158 struct acpi_processor_tx {
163 struct acpi_processor;
164 struct acpi_processor_throttling {
166 unsigned int platform_limit;
167 struct acpi_pct_register control_register;
168 struct acpi_pct_register status_register;
169 unsigned int state_count;
170 struct acpi_processor_tx_tss *states_tss;
171 struct acpi_tsd_package domain_info;
172 cpumask_t shared_cpu_map;
173 int (*acpi_processor_get_throttling) (struct acpi_processor * pr);
174 int (*acpi_processor_set_throttling) (struct acpi_processor * pr,
180 struct acpi_processor_tx states[ACPI_PROCESSOR_MAX_THROTTLING];
183 /* Limit Interface */
185 struct acpi_processor_lx {
186 int px; /* performace state */
187 int tx; /* throttle level */
190 struct acpi_processor_limit {
191 struct acpi_processor_lx state; /* current limit */
192 struct acpi_processor_lx thermal; /* thermal limit */
193 struct acpi_processor_lx user; /* user limit */
196 struct acpi_processor_flags {
204 u8 power_setup_done:1;
208 struct acpi_processor {
213 int performance_platform_limit;
214 int throttling_platform_limit;
215 /* 0 - states 0..n-th state available */
217 struct acpi_processor_flags flags;
218 struct acpi_processor_power power;
219 struct acpi_processor_performance *performance;
220 struct acpi_processor_throttling throttling;
221 struct acpi_processor_limit limit;
223 /* the _PDC objects for this processor, if any */
224 struct acpi_object_list *pdc;
227 struct acpi_processor_errata {
237 extern int acpi_processor_preregister_performance(struct
238 acpi_processor_performance
241 extern int acpi_processor_register_performance(struct acpi_processor_performance
242 *performance, unsigned int cpu);
243 extern void acpi_processor_unregister_performance(struct
244 acpi_processor_performance
248 /* note: this locks both the calling module and the processor module
249 if a _PPC object exists, rmmod is disallowed then */
250 int acpi_processor_notify_smm(struct module *calling_module);
252 /* for communication between multiple parts of the processor kernel module */
253 extern struct acpi_processor *processors[NR_CPUS];
254 extern struct acpi_processor_errata errata;
256 void arch_acpi_processor_init_pdc(struct acpi_processor *pr);
258 #ifdef ARCH_HAS_POWER_INIT
259 void acpi_processor_power_init_bm_check(struct acpi_processor_flags *flags,
261 int acpi_processor_ffh_cstate_probe(unsigned int cpu,
262 struct acpi_processor_cx *cx,
263 struct acpi_power_register *reg);
264 void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx *cstate);
266 static inline void acpi_processor_power_init_bm_check(struct
268 *flags, unsigned int cpu)
273 static inline int acpi_processor_ffh_cstate_probe(unsigned int cpu,
274 struct acpi_processor_cx *cx,
275 struct acpi_power_register
280 static inline void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx
287 /* in processor_perflib.c */
289 #ifdef CONFIG_CPU_FREQ
290 void acpi_processor_ppc_init(void);
291 void acpi_processor_ppc_exit(void);
292 int acpi_processor_ppc_has_changed(struct acpi_processor *pr);
294 static inline void acpi_processor_ppc_init(void)
298 static inline void acpi_processor_ppc_exit(void)
302 static inline int acpi_processor_ppc_has_changed(struct acpi_processor *pr)
304 static unsigned int printout = 1;
307 "Warning: Processor Platform Limit event detected, but not handled.\n");
309 "Consider compiling CPUfreq support into your kernel.\n");
314 #endif /* CONFIG_CPU_FREQ */
316 /* in processor_throttling.c */
317 int acpi_processor_get_throttling_info(struct acpi_processor *pr);
318 extern int acpi_processor_set_throttling(struct acpi_processor *pr, int state);
319 extern struct file_operations acpi_processor_throttling_fops;
321 /* in processor_idle.c */
322 int acpi_processor_power_init(struct acpi_processor *pr,
323 struct acpi_device *device);
324 int acpi_processor_cst_has_changed(struct acpi_processor *pr);
325 int acpi_processor_power_exit(struct acpi_processor *pr,
326 struct acpi_device *device);
327 int acpi_processor_suspend(struct acpi_device * device, pm_message_t state);
328 int acpi_processor_resume(struct acpi_device * device);
329 extern struct cpuidle_driver acpi_idle_driver;
331 /* in processor_thermal.c */
332 int acpi_processor_get_limit_info(struct acpi_processor *pr);
333 extern struct file_operations acpi_processor_limit_fops;
335 #ifdef CONFIG_CPU_FREQ
336 void acpi_thermal_cpufreq_init(void);
337 void acpi_thermal_cpufreq_exit(void);
339 static inline void acpi_thermal_cpufreq_init(void)
343 static inline void acpi_thermal_cpufreq_exit(void)