kernel/tools/power/cpupower/utils/helpers/sysfs.h

   1 #ifndef __CPUPOWER_HELPERS_SYSFS_H__
   2 #define __CPUPOWER_HELPERS_SYSFS_H__
   3
   4 #define PATH_TO_CPU "/sys/devices/system/cpu/"
   5 #define MAX_LINE_LEN 255
   6 #define SYSFS_PATH_MAX 255
   7
   8 extern unsigned int sysfs_read_file(const char *path, char *buf, size_t buflen);
   9
  10 extern unsigned int sysfs_idlestate_file_exists(unsigned int cpu,
  11                                                 unsigned int idlestate,
  12                                                 const char *fname);
  13
  14 extern int sysfs_is_cpu_online(unsigned int cpu);
  15
  16 extern int sysfs_is_idlestate_disabled(unsigned int cpu,
  17                                        unsigned int idlestate);
  18 extern int sysfs_idlestate_disable(unsigned int cpu, unsigned int idlestate,
  19                                    unsigned int disable);
  20 extern unsigned long sysfs_get_idlestate_latency(unsigned int cpu,
  21                                                 unsigned int idlestate);
  22 extern unsigned long sysfs_get_idlestate_usage(unsigned int cpu,
  23                                         unsigned int idlestate);
  24 extern unsigned long long sysfs_get_idlestate_time(unsigned int cpu,
  25                                                 unsigned int idlestate);
  26 extern char *sysfs_get_idlestate_name(unsigned int cpu,
  27                                 unsigned int idlestate);
  28 extern char *sysfs_get_idlestate_desc(unsigned int cpu,
  29                                 unsigned int idlestate);
  30 extern unsigned int sysfs_get_idlestate_count(unsigned int cpu);
  31
  32 extern char *sysfs_get_cpuidle_governor(void);
  33 extern char *sysfs_get_cpuidle_driver(void);
  34
  35 extern int sysfs_get_sched(const char *smt_mc);
  36 extern int sysfs_set_sched(const char *smt_mc, int val);
  37
  38 #endif /* __CPUPOWER_HELPERS_SYSFS_H__ */