include/linux/sched_energy.h

#ifndef _LINUX_SCHED_ENERGY_H
#define _LINUX_SCHED_ENERGY_H

#include <linux/sched.h>
#include <linux/slab.h>

/*
 * There doesn't seem to be an NR_CPUS style max number of sched domain
 * levels so here's an arbitrary constant one for the moment.
 *
 * The levels alluded to here correspond to entries in struct
 * sched_domain_topology_level that are meant to be populated by arch
 * specific code (topology.c).
 */
#define NR_SD_LEVELS 8

#define SD_LEVEL0   0
#define SD_LEVEL1   1
#define SD_LEVEL2   2
#define SD_LEVEL3   3
#define SD_LEVEL4   4
#define SD_LEVEL5   5
#define SD_LEVEL6   6
#define SD_LEVEL7   7

/*
 * Convenience macro for iterating through said sd levels.
 */
#define for_each_possible_sd_level(level)		    \
	for (level = 0; level < NR_SD_LEVELS; level++)

extern struct sched_group_energy *sge_array[NR_CPUS][NR_SD_LEVELS];

#ifdef CONFIG_GENERIC_ARCH_TOPOLOGY
void init_sched_energy_costs(void);
int sched_energy_installed(int cpu);
#else
void init_sched_energy_costs(void) {}
#endif

#endif