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1da177e4 LT |
1 | #ifndef __ACPI_PROCESSOR_H |
2 | #define __ACPI_PROCESSOR_H | |
3 | ||
4 | #include <linux/kernel.h> | |
3b2d9942 | 5 | #include <linux/cpu.h> |
1da177e4 | 6 | |
02df8b93 VP |
7 | #include <asm/acpi.h> |
8 | ||
1da177e4 LT |
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 | ||
02df8b93 VP |
19 | #define ACPI_PDC_REVISION_ID 0x1 |
20 | ||
3b2d9942 VP |
21 | #define ACPI_PSD_REV0_REVISION 0 /* Support for _PSD as in ACPI 3.0 */ |
22 | #define ACPI_PSD_REV0_ENTRIES 5 | |
23 | ||
24 | /* | |
25 | * Types of coordination defined in ACPI 3.0. Same macros can be used across | |
26 | * P, C and T states | |
27 | */ | |
28 | #define DOMAIN_COORD_TYPE_SW_ALL 0xfc | |
29 | #define DOMAIN_COORD_TYPE_SW_ANY 0xfd | |
30 | #define DOMAIN_COORD_TYPE_HW_ALL 0xfe | |
31 | ||
1da177e4 LT |
32 | /* Power Management */ |
33 | ||
34 | struct acpi_processor_cx; | |
35 | ||
36 | struct acpi_power_register { | |
4be44fcd LB |
37 | u8 descriptor; |
38 | u16 length; | |
39 | u8 space_id; | |
40 | u8 bit_width; | |
41 | u8 bit_offset; | |
42 | u8 reserved; | |
43 | u64 address; | |
1da177e4 LT |
44 | } __attribute__ ((packed)); |
45 | ||
1da177e4 | 46 | struct acpi_processor_cx_policy { |
4be44fcd | 47 | u32 count; |
1da177e4 LT |
48 | struct acpi_processor_cx *state; |
49 | struct { | |
4be44fcd LB |
50 | u32 time; |
51 | u32 ticks; | |
52 | u32 count; | |
53 | u32 bm; | |
54 | } threshold; | |
1da177e4 LT |
55 | }; |
56 | ||
57 | struct acpi_processor_cx { | |
4be44fcd LB |
58 | u8 valid; |
59 | u8 type; | |
60 | u32 address; | |
61 | u32 latency; | |
62 | u32 latency_ticks; | |
63 | u32 power; | |
64 | u32 usage; | |
a3c6598f | 65 | u64 time; |
1da177e4 LT |
66 | struct acpi_processor_cx_policy promotion; |
67 | struct acpi_processor_cx_policy demotion; | |
68 | }; | |
69 | ||
70 | struct acpi_processor_power { | |
71 | struct acpi_processor_cx *state; | |
4be44fcd LB |
72 | unsigned long bm_check_timestamp; |
73 | u32 default_state; | |
74 | u32 bm_activity; | |
75 | int count; | |
1da177e4 LT |
76 | struct acpi_processor_cx states[ACPI_PROCESSOR_MAX_POWER]; |
77 | }; | |
78 | ||
79 | /* Performance Management */ | |
80 | ||
3b2d9942 VP |
81 | struct acpi_psd_package { |
82 | acpi_integer num_entries; | |
83 | acpi_integer revision; | |
84 | acpi_integer domain; | |
85 | acpi_integer coord_type; | |
86 | acpi_integer num_processors; | |
87 | } __attribute__ ((packed)); | |
88 | ||
1da177e4 | 89 | struct acpi_pct_register { |
4be44fcd LB |
90 | u8 descriptor; |
91 | u16 length; | |
92 | u8 space_id; | |
93 | u8 bit_width; | |
94 | u8 bit_offset; | |
95 | u8 reserved; | |
96 | u64 address; | |
1da177e4 LT |
97 | } __attribute__ ((packed)); |
98 | ||
99 | struct acpi_processor_px { | |
4be44fcd LB |
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 */ | |
1da177e4 LT |
106 | }; |
107 | ||
1da177e4 | 108 | struct acpi_processor_performance { |
4be44fcd LB |
109 | unsigned int state; |
110 | unsigned int platform_limit; | |
1da177e4 LT |
111 | struct acpi_pct_register control_register; |
112 | struct acpi_pct_register status_register; | |
4be44fcd | 113 | unsigned int state_count; |
1da177e4 | 114 | struct acpi_processor_px *states; |
3b2d9942 VP |
115 | struct acpi_psd_package domain_info; |
116 | cpumask_t shared_cpu_map; | |
117 | unsigned int shared_type; | |
1da177e4 LT |
118 | }; |
119 | ||
1da177e4 LT |
120 | /* Throttling Control */ |
121 | ||
122 | struct acpi_processor_tx { | |
4be44fcd LB |
123 | u16 power; |
124 | u16 performance; | |
1da177e4 LT |
125 | }; |
126 | ||
127 | struct acpi_processor_throttling { | |
4be44fcd LB |
128 | int state; |
129 | u32 address; | |
130 | u8 duty_offset; | |
131 | u8 duty_width; | |
132 | int state_count; | |
1da177e4 LT |
133 | struct acpi_processor_tx states[ACPI_PROCESSOR_MAX_THROTTLING]; |
134 | }; | |
135 | ||
136 | /* Limit Interface */ | |
137 | ||
138 | struct acpi_processor_lx { | |
4be44fcd LB |
139 | int px; /* performace state */ |
140 | int tx; /* throttle level */ | |
1da177e4 LT |
141 | }; |
142 | ||
143 | struct acpi_processor_limit { | |
4be44fcd | 144 | struct acpi_processor_lx state; /* current limit */ |
1da177e4 | 145 | struct acpi_processor_lx thermal; /* thermal limit */ |
4be44fcd | 146 | struct acpi_processor_lx user; /* user limit */ |
1da177e4 LT |
147 | }; |
148 | ||
1da177e4 | 149 | struct acpi_processor_flags { |
4be44fcd LB |
150 | u8 power:1; |
151 | u8 performance:1; | |
152 | u8 throttling:1; | |
153 | u8 limit:1; | |
154 | u8 bm_control:1; | |
155 | u8 bm_check:1; | |
156 | u8 has_cst:1; | |
157 | u8 power_setup_done:1; | |
1da177e4 LT |
158 | }; |
159 | ||
160 | struct acpi_processor { | |
4be44fcd LB |
161 | acpi_handle handle; |
162 | u32 acpi_id; | |
163 | u32 id; | |
164 | u32 pblk; | |
165 | int performance_platform_limit; | |
1da177e4 LT |
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; | |
05131ecc VP |
171 | |
172 | /* the _PDC objects for this processor, if any */ | |
173 | struct acpi_object_list *pdc; | |
1da177e4 LT |
174 | }; |
175 | ||
176 | struct acpi_processor_errata { | |
4be44fcd | 177 | u8 smp; |
1da177e4 | 178 | struct { |
4be44fcd LB |
179 | u8 throttle:1; |
180 | u8 fdma:1; | |
181 | u8 reserved:6; | |
182 | u32 bmisx; | |
183 | } piix4; | |
1da177e4 LT |
184 | }; |
185 | ||
3b2d9942 VP |
186 | extern int acpi_processor_preregister_performance( |
187 | struct acpi_processor_performance **performance); | |
188 | ||
4be44fcd LB |
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 | |
193 | *performance, | |
194 | unsigned int cpu); | |
1da177e4 LT |
195 | |
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); | |
199 | ||
1da177e4 | 200 | /* for communication between multiple parts of the processor kernel module */ |
4be44fcd | 201 | extern struct acpi_processor *processors[NR_CPUS]; |
1da177e4 LT |
202 | extern struct acpi_processor_errata errata; |
203 | ||
05131ecc | 204 | void arch_acpi_processor_init_pdc(struct acpi_processor *pr); |
02df8b93 | 205 | |
05131ecc | 206 | #ifdef ARCH_HAS_POWER_INIT |
02df8b93 | 207 | void acpi_processor_power_init_bm_check(struct acpi_processor_flags *flags, |
4be44fcd | 208 | unsigned int cpu); |
02df8b93 | 209 | #else |
4be44fcd LB |
210 | static inline void acpi_processor_power_init_bm_check(struct |
211 | acpi_processor_flags | |
212 | *flags, unsigned int cpu) | |
02df8b93 VP |
213 | { |
214 | flags->bm_check = 1; | |
215 | return; | |
216 | } | |
217 | #endif | |
218 | ||
1da177e4 | 219 | /* in processor_perflib.c */ |
02df8b93 | 220 | |
1da177e4 LT |
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); | |
225 | #else | |
4be44fcd LB |
226 | static inline void acpi_processor_ppc_init(void) |
227 | { | |
228 | return; | |
229 | } | |
230 | static inline void acpi_processor_ppc_exit(void) | |
231 | { | |
232 | return; | |
233 | } | |
234 | static inline int acpi_processor_ppc_has_changed(struct acpi_processor *pr) | |
235 | { | |
1da177e4 LT |
236 | static unsigned int printout = 1; |
237 | if (printout) { | |
4be44fcd LB |
238 | printk(KERN_WARNING |
239 | "Warning: Processor Platform Limit event detected, but not handled.\n"); | |
240 | printk(KERN_WARNING | |
241 | "Consider compiling CPUfreq support into your kernel.\n"); | |
1da177e4 LT |
242 | printout = 0; |
243 | } | |
244 | return 0; | |
245 | } | |
4be44fcd | 246 | #endif /* CONFIG_CPU_FREQ */ |
1da177e4 LT |
247 | |
248 | /* in processor_throttling.c */ | |
4be44fcd LB |
249 | int acpi_processor_get_throttling_info(struct acpi_processor *pr); |
250 | int acpi_processor_set_throttling(struct acpi_processor *pr, int state); | |
1da177e4 LT |
251 | extern struct file_operations acpi_processor_throttling_fops; |
252 | ||
253 | /* in processor_idle.c */ | |
4be44fcd LB |
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); | |
1da177e4 LT |
259 | |
260 | /* in processor_thermal.c */ | |
4be44fcd | 261 | int acpi_processor_get_limit_info(struct acpi_processor *pr); |
1da177e4 LT |
262 | extern struct file_operations acpi_processor_limit_fops; |
263 | ||
264 | #ifdef CONFIG_CPU_FREQ | |
265 | void acpi_thermal_cpufreq_init(void); | |
266 | void acpi_thermal_cpufreq_exit(void); | |
267 | #else | |
4be44fcd LB |
268 | static inline void acpi_thermal_cpufreq_init(void) |
269 | { | |
270 | return; | |
271 | } | |
272 | static inline void acpi_thermal_cpufreq_exit(void) | |
273 | { | |
274 | return; | |
275 | } | |
1da177e4 LT |
276 | #endif |
277 | ||
1da177e4 | 278 | #endif |