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
,
180 unsigned int shared_type
;
181 struct acpi_processor_tx states
[ACPI_PROCESSOR_MAX_THROTTLING
];
184 /* Limit Interface */
186 struct acpi_processor_lx
{
187 int px
; /* performace state */
188 int tx
; /* throttle level */
191 struct acpi_processor_limit
{
192 struct acpi_processor_lx state
; /* current limit */
193 struct acpi_processor_lx thermal
; /* thermal limit */
194 struct acpi_processor_lx user
; /* user limit */
197 struct acpi_processor_flags
{
205 u8 power_setup_done
:1;
209 struct acpi_processor
{
214 int performance_platform_limit
;
215 int throttling_platform_limit
;
216 /* 0 - states 0..n-th state available */
218 struct acpi_processor_flags flags
;
219 struct acpi_processor_power power
;
220 struct acpi_processor_performance
*performance
;
221 struct acpi_processor_throttling throttling
;
222 struct acpi_processor_limit limit
;
224 /* the _PDC objects for this processor, if any */
225 struct acpi_object_list
*pdc
;
228 struct acpi_processor_errata
{
238 extern int acpi_processor_preregister_performance(struct
239 acpi_processor_performance
242 extern int acpi_processor_register_performance(struct acpi_processor_performance
243 *performance
, unsigned int cpu
);
244 extern void acpi_processor_unregister_performance(struct
245 acpi_processor_performance
249 /* note: this locks both the calling module and the processor module
250 if a _PPC object exists, rmmod is disallowed then */
251 int acpi_processor_notify_smm(struct module
*calling_module
);
253 /* for communication between multiple parts of the processor kernel module */
254 extern struct acpi_processor
*processors
[NR_CPUS
];
255 extern struct acpi_processor_errata errata
;
257 void arch_acpi_processor_init_pdc(struct acpi_processor
*pr
);
259 #ifdef ARCH_HAS_POWER_INIT
260 void acpi_processor_power_init_bm_check(struct acpi_processor_flags
*flags
,
262 int acpi_processor_ffh_cstate_probe(unsigned int cpu
,
263 struct acpi_processor_cx
*cx
,
264 struct acpi_power_register
*reg
);
265 void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx
*cstate
);
267 static inline void acpi_processor_power_init_bm_check(struct
269 *flags
, unsigned int cpu
)
274 static inline int acpi_processor_ffh_cstate_probe(unsigned int cpu
,
275 struct acpi_processor_cx
*cx
,
276 struct acpi_power_register
281 static inline void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx
288 /* in processor_perflib.c */
290 #ifdef CONFIG_CPU_FREQ
291 void acpi_processor_ppc_init(void);
292 void acpi_processor_ppc_exit(void);
293 int acpi_processor_ppc_has_changed(struct acpi_processor
*pr
);
295 static inline void acpi_processor_ppc_init(void)
299 static inline void acpi_processor_ppc_exit(void)
303 static inline int acpi_processor_ppc_has_changed(struct acpi_processor
*pr
)
305 static unsigned int printout
= 1;
308 "Warning: Processor Platform Limit event detected, but not handled.\n");
310 "Consider compiling CPUfreq support into your kernel.\n");
315 #endif /* CONFIG_CPU_FREQ */
317 /* in processor_throttling.c */
318 int acpi_processor_get_throttling_info(struct acpi_processor
*pr
);
319 extern int acpi_processor_set_throttling(struct acpi_processor
*pr
, int state
);
320 extern struct file_operations acpi_processor_throttling_fops
;
321 extern void acpi_processor_throttling_init(void);
322 /* in processor_idle.c */
323 int acpi_processor_power_init(struct acpi_processor
*pr
,
324 struct acpi_device
*device
);
325 int acpi_processor_cst_has_changed(struct acpi_processor
*pr
);
326 int acpi_processor_power_exit(struct acpi_processor
*pr
,
327 struct acpi_device
*device
);
328 int acpi_processor_suspend(struct acpi_device
* device
, pm_message_t state
);
329 int acpi_processor_resume(struct acpi_device
* device
);
330 extern struct cpuidle_driver acpi_idle_driver
;
332 /* in processor_thermal.c */
333 int acpi_processor_get_limit_info(struct acpi_processor
*pr
);
334 extern struct file_operations acpi_processor_limit_fops
;
336 #ifdef CONFIG_CPU_FREQ
337 void acpi_thermal_cpufreq_init(void);
338 void acpi_thermal_cpufreq_exit(void);
340 static inline void acpi_thermal_cpufreq_init(void)
344 static inline void acpi_thermal_cpufreq_exit(void)