1 #ifndef __ACPI_PROCESSOR_H
2 #define __ACPI_PROCESSOR_H
4 #include <linux/kernel.h>
5 #include <linux/config.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
26 * Types of coordination defined in ACPI 3.0. Same macros can be used across
29 #define DOMAIN_COORD_TYPE_SW_ALL 0xfc
30 #define DOMAIN_COORD_TYPE_SW_ANY 0xfd
31 #define DOMAIN_COORD_TYPE_HW_ALL 0xfe
33 /* Power Management */
35 struct acpi_processor_cx;
37 struct acpi_power_register {
45 } __attribute__ ((packed));
47 struct acpi_processor_cx_policy {
49 struct acpi_processor_cx *state;
58 struct acpi_processor_cx {
66 struct acpi_processor_cx_policy promotion;
67 struct acpi_processor_cx_policy demotion;
70 struct acpi_processor_power {
71 struct acpi_processor_cx *state;
72 unsigned long bm_check_timestamp;
76 struct acpi_processor_cx states[ACPI_PROCESSOR_MAX_POWER];
79 /* Performance Management */
81 struct acpi_psd_package {
82 acpi_integer num_entries;
83 acpi_integer revision;
85 acpi_integer coord_type;
86 acpi_integer num_processors;
87 } __attribute__ ((packed));
89 struct acpi_pct_register {
97 } __attribute__ ((packed));
99 struct acpi_processor_px {
100 acpi_integer core_frequency; /* megahertz */
101 acpi_integer power; /* milliWatts */
102 acpi_integer transition_latency; /* microseconds */
103 acpi_integer bus_master_latency; /* microseconds */
104 acpi_integer control; /* control value */
105 acpi_integer status; /* success indicator */
108 struct acpi_processor_performance {
110 unsigned int platform_limit;
111 struct acpi_pct_register control_register;
112 struct acpi_pct_register status_register;
113 unsigned int state_count;
114 struct acpi_processor_px *states;
115 struct acpi_psd_package domain_info;
116 cpumask_t shared_cpu_map;
117 unsigned int shared_type;
120 /* Throttling Control */
122 struct acpi_processor_tx {
127 struct acpi_processor_throttling {
133 struct acpi_processor_tx states[ACPI_PROCESSOR_MAX_THROTTLING];
136 /* Limit Interface */
138 struct acpi_processor_lx {
139 int px; /* performace state */
140 int tx; /* throttle level */
143 struct acpi_processor_limit {
144 struct acpi_processor_lx state; /* current limit */
145 struct acpi_processor_lx thermal; /* thermal limit */
146 struct acpi_processor_lx user; /* user limit */
149 struct acpi_processor_flags {
157 u8 power_setup_done:1;
160 struct acpi_processor {
165 int performance_platform_limit;
166 struct acpi_processor_flags flags;
167 struct acpi_processor_power power;
168 struct acpi_processor_performance *performance;
169 struct acpi_processor_throttling throttling;
170 struct acpi_processor_limit limit;
172 /* the _PDC objects for this processor, if any */
173 struct acpi_object_list *pdc;
176 struct acpi_processor_errata {
186 extern int acpi_processor_preregister_performance(
187 struct acpi_processor_performance **performance);
189 extern int acpi_processor_register_performance(struct acpi_processor_performance
190 *performance, unsigned int cpu);
191 extern void acpi_processor_unregister_performance(struct
192 acpi_processor_performance
196 /* note: this locks both the calling module and the processor module
197 if a _PPC object exists, rmmod is disallowed then */
198 int acpi_processor_notify_smm(struct module *calling_module);
200 /* for communication between multiple parts of the processor kernel module */
201 extern struct acpi_processor *processors[NR_CPUS];
202 extern struct acpi_processor_errata errata;
204 void arch_acpi_processor_init_pdc(struct acpi_processor *pr);
206 #ifdef ARCH_HAS_POWER_INIT
207 void acpi_processor_power_init_bm_check(struct acpi_processor_flags *flags,
210 static inline void acpi_processor_power_init_bm_check(struct
212 *flags, unsigned int cpu)
219 /* in processor_perflib.c */
221 #ifdef CONFIG_CPU_FREQ
222 void acpi_processor_ppc_init(void);
223 void acpi_processor_ppc_exit(void);
224 int acpi_processor_ppc_has_changed(struct acpi_processor *pr);
226 static inline void acpi_processor_ppc_init(void)
230 static inline void acpi_processor_ppc_exit(void)
234 static inline int acpi_processor_ppc_has_changed(struct acpi_processor *pr)
236 static unsigned int printout = 1;
239 "Warning: Processor Platform Limit event detected, but not handled.\n");
241 "Consider compiling CPUfreq support into your kernel.\n");
246 #endif /* CONFIG_CPU_FREQ */
248 /* in processor_throttling.c */
249 int acpi_processor_get_throttling_info(struct acpi_processor *pr);
250 int acpi_processor_set_throttling(struct acpi_processor *pr, int state);
251 extern struct file_operations acpi_processor_throttling_fops;
253 /* in processor_idle.c */
254 int acpi_processor_power_init(struct acpi_processor *pr,
255 struct acpi_device *device);
256 int acpi_processor_cst_has_changed(struct acpi_processor *pr);
257 int acpi_processor_power_exit(struct acpi_processor *pr,
258 struct acpi_device *device);
260 /* in processor_thermal.c */
261 int acpi_processor_get_limit_info(struct acpi_processor *pr);
262 extern struct file_operations acpi_processor_limit_fops;
264 #ifdef CONFIG_CPU_FREQ
265 void acpi_thermal_cpufreq_init(void);
266 void acpi_thermal_cpufreq_exit(void);
268 static inline void acpi_thermal_cpufreq_init(void)
272 static inline void acpi_thermal_cpufreq_exit(void)