Linux kernel mirror (for testing)
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1#ifndef __ACPI_PROCESSOR_H
2#define __ACPI_PROCESSOR_H
3
4#include <linux/kernel.h>
5#include <linux/config.h>
6
7#include <asm/acpi.h>
8
9#define ACPI_PROCESSOR_BUSY_METRIC 10
10
11#define ACPI_PROCESSOR_MAX_POWER 8
12#define ACPI_PROCESSOR_MAX_C2_LATENCY 100
13#define ACPI_PROCESSOR_MAX_C3_LATENCY 1000
14
15#define ACPI_PROCESSOR_MAX_THROTTLING 16
16#define ACPI_PROCESSOR_MAX_THROTTLE 250 /* 25% */
17#define ACPI_PROCESSOR_MAX_DUTY_WIDTH 4
18
19#define ACPI_PDC_REVISION_ID 0x1
20
21/* Power Management */
22
23struct acpi_processor_cx;
24
25struct acpi_power_register {
26 u8 descriptor;
27 u16 length;
28 u8 space_id;
29 u8 bit_width;
30 u8 bit_offset;
31 u8 reserved;
32 u64 address;
33} __attribute__ ((packed));
34
35struct acpi_processor_cx_policy {
36 u32 count;
37 struct acpi_processor_cx *state;
38 struct {
39 u32 time;
40 u32 ticks;
41 u32 count;
42 u32 bm;
43 } threshold;
44};
45
46struct acpi_processor_cx {
47 u8 valid;
48 u8 type;
49 u32 address;
50 u32 latency;
51 u32 latency_ticks;
52 u32 power;
53 u32 usage;
54 struct acpi_processor_cx_policy promotion;
55 struct acpi_processor_cx_policy demotion;
56};
57
58struct acpi_processor_power {
59 struct acpi_processor_cx *state;
60 unsigned long bm_check_timestamp;
61 u32 default_state;
62 u32 bm_activity;
63 int count;
64 struct acpi_processor_cx states[ACPI_PROCESSOR_MAX_POWER];
65};
66
67/* Performance Management */
68
69struct acpi_pct_register {
70 u8 descriptor;
71 u16 length;
72 u8 space_id;
73 u8 bit_width;
74 u8 bit_offset;
75 u8 reserved;
76 u64 address;
77} __attribute__ ((packed));
78
79struct acpi_processor_px {
80 acpi_integer core_frequency; /* megahertz */
81 acpi_integer power; /* milliWatts */
82 acpi_integer transition_latency; /* microseconds */
83 acpi_integer bus_master_latency; /* microseconds */
84 acpi_integer control; /* control value */
85 acpi_integer status; /* success indicator */
86};
87
88struct acpi_processor_performance {
89 unsigned int state;
90 unsigned int platform_limit;
91 struct acpi_pct_register control_register;
92 struct acpi_pct_register status_register;
93 unsigned int state_count;
94 struct acpi_processor_px *states;
95
96};
97
98/* Throttling Control */
99
100struct acpi_processor_tx {
101 u16 power;
102 u16 performance;
103};
104
105struct acpi_processor_throttling {
106 int state;
107 u32 address;
108 u8 duty_offset;
109 u8 duty_width;
110 int state_count;
111 struct acpi_processor_tx states[ACPI_PROCESSOR_MAX_THROTTLING];
112};
113
114/* Limit Interface */
115
116struct acpi_processor_lx {
117 int px; /* performace state */
118 int tx; /* throttle level */
119};
120
121struct acpi_processor_limit {
122 struct acpi_processor_lx state; /* current limit */
123 struct acpi_processor_lx thermal; /* thermal limit */
124 struct acpi_processor_lx user; /* user limit */
125};
126
127struct acpi_processor_flags {
128 u8 power:1;
129 u8 performance:1;
130 u8 throttling:1;
131 u8 limit:1;
132 u8 bm_control:1;
133 u8 bm_check:1;
134 u8 has_cst:1;
135 u8 power_setup_done:1;
136};
137
138struct acpi_processor {
139 acpi_handle handle;
140 u32 acpi_id;
141 u32 id;
142 u32 pblk;
143 int performance_platform_limit;
144 struct acpi_processor_flags flags;
145 struct acpi_processor_power power;
146 struct acpi_processor_performance *performance;
147 struct acpi_processor_throttling throttling;
148 struct acpi_processor_limit limit;
149
150 /* the _PDC objects for this processor, if any */
151 struct acpi_object_list *pdc;
152};
153
154struct acpi_processor_errata {
155 u8 smp;
156 struct {
157 u8 throttle:1;
158 u8 fdma:1;
159 u8 reserved:6;
160 u32 bmisx;
161 } piix4;
162};
163
164extern int acpi_processor_register_performance(struct acpi_processor_performance
165 *performance, unsigned int cpu);
166extern void acpi_processor_unregister_performance(struct
167 acpi_processor_performance
168 *performance,
169 unsigned int cpu);
170
171/* note: this locks both the calling module and the processor module
172 if a _PPC object exists, rmmod is disallowed then */
173int acpi_processor_notify_smm(struct module *calling_module);
174
175/* for communication between multiple parts of the processor kernel module */
176extern struct acpi_processor *processors[NR_CPUS];
177extern struct acpi_processor_errata errata;
178
179void arch_acpi_processor_init_pdc(struct acpi_processor *pr);
180
181#ifdef ARCH_HAS_POWER_INIT
182void acpi_processor_power_init_bm_check(struct acpi_processor_flags *flags,
183 unsigned int cpu);
184#else
185static inline void acpi_processor_power_init_bm_check(struct
186 acpi_processor_flags
187 *flags, unsigned int cpu)
188{
189 flags->bm_check = 1;
190 return;
191}
192#endif
193
194/* in processor_perflib.c */
195
196#ifdef CONFIG_CPU_FREQ
197void acpi_processor_ppc_init(void);
198void acpi_processor_ppc_exit(void);
199int acpi_processor_ppc_has_changed(struct acpi_processor *pr);
200#else
201static inline void acpi_processor_ppc_init(void)
202{
203 return;
204}
205static inline void acpi_processor_ppc_exit(void)
206{
207 return;
208}
209static inline int acpi_processor_ppc_has_changed(struct acpi_processor *pr)
210{
211 static unsigned int printout = 1;
212 if (printout) {
213 printk(KERN_WARNING
214 "Warning: Processor Platform Limit event detected, but not handled.\n");
215 printk(KERN_WARNING
216 "Consider compiling CPUfreq support into your kernel.\n");
217 printout = 0;
218 }
219 return 0;
220}
221#endif /* CONFIG_CPU_FREQ */
222
223/* in processor_throttling.c */
224int acpi_processor_get_throttling_info(struct acpi_processor *pr);
225int acpi_processor_set_throttling(struct acpi_processor *pr, int state);
226extern struct file_operations acpi_processor_throttling_fops;
227
228/* in processor_idle.c */
229int acpi_processor_power_init(struct acpi_processor *pr,
230 struct acpi_device *device);
231int acpi_processor_cst_has_changed(struct acpi_processor *pr);
232int acpi_processor_power_exit(struct acpi_processor *pr,
233 struct acpi_device *device);
234
235/* in processor_thermal.c */
236int acpi_processor_get_limit_info(struct acpi_processor *pr);
237extern struct file_operations acpi_processor_limit_fops;
238
239#ifdef CONFIG_CPU_FREQ
240void acpi_thermal_cpufreq_init(void);
241void acpi_thermal_cpufreq_exit(void);
242#else
243static inline void acpi_thermal_cpufreq_init(void)
244{
245 return;
246}
247static inline void acpi_thermal_cpufreq_exit(void)
248{
249 return;
250}
251#endif
252
253#endif