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 /* Power Management */
34 struct acpi_processor_cx;
36 struct acpi_power_register {
44 } __attribute__ ((packed));
46 struct acpi_processor_cx_policy {
48 struct acpi_processor_cx *state;
57 struct acpi_processor_cx {
65 struct acpi_processor_cx_policy promotion;
66 struct acpi_processor_cx_policy demotion;
69 struct acpi_processor_power {
70 struct acpi_processor_cx *state;
71 unsigned long bm_check_timestamp;
75 struct acpi_processor_cx states[ACPI_PROCESSOR_MAX_POWER];
78 /* Performance Management */
80 struct acpi_psd_package {
81 acpi_integer num_entries;
82 acpi_integer revision;
84 acpi_integer coord_type;
85 acpi_integer num_processors;
86 } __attribute__ ((packed));
88 struct acpi_pct_register {
96 } __attribute__ ((packed));
98 struct acpi_processor_px {
99 acpi_integer core_frequency; /* megahertz */
100 acpi_integer power; /* milliWatts */
101 acpi_integer transition_latency; /* microseconds */
102 acpi_integer bus_master_latency; /* microseconds */
103 acpi_integer control; /* control value */
104 acpi_integer status; /* success indicator */
107 struct acpi_processor_performance {
109 unsigned int platform_limit;
110 struct acpi_pct_register control_register;
111 struct acpi_pct_register status_register;
112 unsigned int state_count;
113 struct acpi_processor_px *states;
114 struct acpi_psd_package domain_info;
115 cpumask_t shared_cpu_map;
116 unsigned int shared_type;
119 /* Throttling Control */
121 struct acpi_processor_tx {
126 struct acpi_processor_throttling {
132 struct acpi_processor_tx states[ACPI_PROCESSOR_MAX_THROTTLING];
135 /* Limit Interface */
137 struct acpi_processor_lx {
138 int px; /* performace state */
139 int tx; /* throttle level */
142 struct acpi_processor_limit {
143 struct acpi_processor_lx state; /* current limit */
144 struct acpi_processor_lx thermal; /* thermal limit */
145 struct acpi_processor_lx user; /* user limit */
148 struct acpi_processor_flags {
156 u8 power_setup_done:1;
159 struct acpi_processor {
164 int performance_platform_limit;
165 struct acpi_processor_flags flags;
166 struct acpi_processor_power power;
167 struct acpi_processor_performance *performance;
168 struct acpi_processor_throttling throttling;
169 struct acpi_processor_limit limit;
171 /* the _PDC objects for this processor, if any */
172 struct acpi_object_list *pdc;
175 struct acpi_processor_errata {
185 extern int acpi_processor_preregister_performance(
186 struct acpi_processor_performance **performance);
188 extern int acpi_processor_register_performance(struct acpi_processor_performance
189 *performance, unsigned int cpu);
190 extern void acpi_processor_unregister_performance(struct
191 acpi_processor_performance
195 /* note: this locks both the calling module and the processor module
196 if a _PPC object exists, rmmod is disallowed then */
197 int acpi_processor_notify_smm(struct module *calling_module);
199 /* for communication between multiple parts of the processor kernel module */
200 extern struct acpi_processor *processors[NR_CPUS];
201 extern struct acpi_processor_errata errata;
203 void arch_acpi_processor_init_pdc(struct acpi_processor *pr);
205 #ifdef ARCH_HAS_POWER_INIT
206 void acpi_processor_power_init_bm_check(struct acpi_processor_flags *flags,
209 static inline void acpi_processor_power_init_bm_check(struct
211 *flags, unsigned int cpu)
218 /* in processor_perflib.c */
220 #ifdef CONFIG_CPU_FREQ
221 void acpi_processor_ppc_init(void);
222 void acpi_processor_ppc_exit(void);
223 int acpi_processor_ppc_has_changed(struct acpi_processor *pr);
225 static inline void acpi_processor_ppc_init(void)
229 static inline void acpi_processor_ppc_exit(void)
233 static inline int acpi_processor_ppc_has_changed(struct acpi_processor *pr)
235 static unsigned int printout = 1;
238 "Warning: Processor Platform Limit event detected, but not handled.\n");
240 "Consider compiling CPUfreq support into your kernel.\n");
245 #endif /* CONFIG_CPU_FREQ */
247 /* in processor_throttling.c */
248 int acpi_processor_get_throttling_info(struct acpi_processor *pr);
249 int acpi_processor_set_throttling(struct acpi_processor *pr, int state);
250 extern struct file_operations acpi_processor_throttling_fops;
252 /* in processor_idle.c */
253 int acpi_processor_power_init(struct acpi_processor *pr,
254 struct acpi_device *device);
255 int acpi_processor_cst_has_changed(struct acpi_processor *pr);
256 int acpi_processor_power_exit(struct acpi_processor *pr,
257 struct acpi_device *device);
259 /* in processor_thermal.c */
260 int acpi_processor_get_limit_info(struct acpi_processor *pr);
261 extern struct file_operations acpi_processor_limit_fops;
263 #ifdef CONFIG_CPU_FREQ
264 void acpi_thermal_cpufreq_init(void);
265 void acpi_thermal_cpufreq_exit(void);
267 static inline void acpi_thermal_cpufreq_init(void)
271 static inline void acpi_thermal_cpufreq_exit(void)