1 #ifndef __ACPI_PROCESSOR_H
2 #define __ACPI_PROCESSOR_H
4 #include <linux/kernel.h>
9 #define ACPI_PROCESSOR_BUSY_METRIC 10
11 #define ACPI_PROCESSOR_MAX_POWER 8
12 #define ACPI_PROCESSOR_MAX_C2_LATENCY 100
13 #define ACPI_PROCESSOR_MAX_C3_LATENCY 1000
15 #define ACPI_PROCESSOR_MAX_THROTTLING 16
16 #define ACPI_PROCESSOR_MAX_THROTTLE 250 /* 25% */
17 #define ACPI_PROCESSOR_MAX_DUTY_WIDTH 4
19 #define ACPI_PDC_REVISION_ID 0x1
21 #define ACPI_PSD_REV0_REVISION 0 /* Support for _PSD as in ACPI 3.0 */
22 #define ACPI_PSD_REV0_ENTRIES 5
25 * Types of coordination defined in ACPI 3.0. Same macros can be used across
28 #define DOMAIN_COORD_TYPE_SW_ALL 0xfc
29 #define DOMAIN_COORD_TYPE_SW_ANY 0xfd
30 #define DOMAIN_COORD_TYPE_HW_ALL 0xfe
32 #define ACPI_CSTATE_SYSTEMIO (0)
33 #define ACPI_CSTATE_FFH (1)
35 /* Power Management */
37 struct acpi_processor_cx;
39 struct acpi_power_register {
47 } __attribute__ ((packed));
49 struct acpi_processor_cx_policy {
51 struct acpi_processor_cx *state;
60 struct acpi_processor_cx {
71 struct acpi_processor_cx_policy promotion;
72 struct acpi_processor_cx_policy demotion;
75 struct acpi_processor_power {
76 struct acpi_processor_cx *state;
77 unsigned long bm_check_timestamp;
81 struct acpi_processor_cx states[ACPI_PROCESSOR_MAX_POWER];
84 /* Performance Management */
86 struct acpi_psd_package {
87 acpi_integer num_entries;
88 acpi_integer revision;
90 acpi_integer coord_type;
91 acpi_integer num_processors;
92 } __attribute__ ((packed));
94 struct acpi_pct_register {
102 } __attribute__ ((packed));
104 struct acpi_processor_px {
105 acpi_integer core_frequency; /* megahertz */
106 acpi_integer power; /* milliWatts */
107 acpi_integer transition_latency; /* microseconds */
108 acpi_integer bus_master_latency; /* microseconds */
109 acpi_integer control; /* control value */
110 acpi_integer status; /* success indicator */
113 struct acpi_processor_performance {
115 unsigned int platform_limit;
116 struct acpi_pct_register control_register;
117 struct acpi_pct_register status_register;
118 unsigned int state_count;
119 struct acpi_processor_px *states;
120 struct acpi_psd_package domain_info;
121 cpumask_t shared_cpu_map;
122 unsigned int shared_type;
125 /* Throttling Control */
127 struct acpi_processor_tx {
132 struct acpi_processor_throttling {
138 struct acpi_processor_tx states[ACPI_PROCESSOR_MAX_THROTTLING];
141 /* Limit Interface */
143 struct acpi_processor_lx {
144 int px; /* performace state */
145 int tx; /* throttle level */
148 struct acpi_processor_limit {
149 struct acpi_processor_lx state; /* current limit */
150 struct acpi_processor_lx thermal; /* thermal limit */
151 struct acpi_processor_lx user; /* user limit */
154 struct acpi_processor_flags {
162 u8 power_setup_done:1;
165 struct acpi_processor {
170 int performance_platform_limit;
171 struct acpi_processor_flags flags;
172 struct acpi_processor_power power;
173 struct acpi_processor_performance *performance;
174 struct acpi_processor_throttling throttling;
175 struct acpi_processor_limit limit;
177 /* the _PDC objects for this processor, if any */
178 struct acpi_object_list *pdc;
181 struct acpi_processor_errata {
191 extern int acpi_processor_preregister_performance(
192 struct acpi_processor_performance **performance);
194 extern int acpi_processor_register_performance(struct acpi_processor_performance
195 *performance, unsigned int cpu);
196 extern void acpi_processor_unregister_performance(struct
197 acpi_processor_performance
201 /* note: this locks both the calling module and the processor module
202 if a _PPC object exists, rmmod is disallowed then */
203 int acpi_processor_notify_smm(struct module *calling_module);
205 /* for communication between multiple parts of the processor kernel module */
206 extern struct acpi_processor *processors[NR_CPUS];
207 extern struct acpi_processor_errata errata;
209 void arch_acpi_processor_init_pdc(struct acpi_processor *pr);
211 #ifdef ARCH_HAS_POWER_INIT
212 void acpi_processor_power_init_bm_check(struct acpi_processor_flags *flags,
214 int acpi_processor_ffh_cstate_probe(unsigned int cpu,
215 struct acpi_processor_cx *cx, struct acpi_power_register *reg);
216 void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx *cstate);
218 static inline void acpi_processor_power_init_bm_check(struct
220 *flags, unsigned int cpu)
225 static inline int acpi_processor_ffh_cstate_probe(unsigned int cpu,
226 struct acpi_processor_cx *cx, struct acpi_power_register *reg)
230 static inline void acpi_processor_ffh_cstate_enter(
231 struct acpi_processor_cx *cstate)
237 /* in processor_perflib.c */
239 #ifdef CONFIG_CPU_FREQ
240 void acpi_processor_ppc_init(void);
241 void acpi_processor_ppc_exit(void);
242 int acpi_processor_ppc_has_changed(struct acpi_processor *pr);
244 static inline void acpi_processor_ppc_init(void)
248 static inline void acpi_processor_ppc_exit(void)
252 static inline int acpi_processor_ppc_has_changed(struct acpi_processor *pr)
254 static unsigned int printout = 1;
257 "Warning: Processor Platform Limit event detected, but not handled.\n");
259 "Consider compiling CPUfreq support into your kernel.\n");
264 #endif /* CONFIG_CPU_FREQ */
266 /* in processor_throttling.c */
267 int acpi_processor_get_throttling_info(struct acpi_processor *pr);
268 int acpi_processor_set_throttling(struct acpi_processor *pr, int state);
269 extern struct file_operations acpi_processor_throttling_fops;
271 /* in processor_idle.c */
272 int acpi_processor_power_init(struct acpi_processor *pr,
273 struct acpi_device *device);
274 int acpi_processor_cst_has_changed(struct acpi_processor *pr);
275 int acpi_processor_power_exit(struct acpi_processor *pr,
276 struct acpi_device *device);
278 /* in processor_thermal.c */
279 int acpi_processor_get_limit_info(struct acpi_processor *pr);
280 extern struct file_operations acpi_processor_limit_fops;
282 #ifdef CONFIG_CPU_FREQ
283 void acpi_thermal_cpufreq_init(void);
284 void acpi_thermal_cpufreq_exit(void);
286 static inline void acpi_thermal_cpufreq_init(void)
290 static inline void acpi_thermal_cpufreq_exit(void)