1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _LINUX_SCHED_CPUFREQ_H
3 #define _LINUX_SCHED_CPUFREQ_H
4 
5 #include <linux/types.h>
6 
7 /*
8  * Interface between cpufreq drivers and the scheduler:
9  */
10 
11 #define SCHED_CPUFREQ_IOWAIT	(1U << 0)
12 
13 #ifdef CONFIG_CPU_FREQ
14 struct cpufreq_policy;
15 
16 struct update_util_data {
17        void (*func)(struct update_util_data *data, u64 time, unsigned int flags);
18 };
19 
20 void cpufreq_add_update_util_hook(int cpu, struct update_util_data *data,
21                        void (*func)(struct update_util_data *data, u64 time,
22 				    unsigned int flags));
23 void cpufreq_remove_update_util_hook(int cpu);
24 bool cpufreq_this_cpu_can_update(struct cpufreq_policy *policy);
25 
map_util_freq(unsigned long util,unsigned long freq,unsigned long cap)26 static inline unsigned long map_util_freq(unsigned long util,
27 					unsigned long freq, unsigned long cap)
28 {
29 	return freq * util / cap;
30 }
31 
map_util_perf(unsigned long util)32 static inline unsigned long map_util_perf(unsigned long util)
33 {
34 	return util + (util >> 2);
35 }
36 #endif /* CONFIG_CPU_FREQ */
37 
38 #endif /* _LINUX_SCHED_CPUFREQ_H */
39