#ifndef KERNEL_CPU_H_
#define KERNEL_CPU_H_

#include <kernel/types.h>
#include <kernel/machine/cpu.h>
#include <stdint.h>
#include <kernel/sched.h>

#ifdef __cplusplus
extern "C" {
#endif

enum cpu_flags {
	CPU_ONLINE = 0x01u,
};

struct cpu_data {
	enum cpu_flags c_flags;
	unsigned int c_id;
	int c_preempt_count;

	struct runqueue c_rq;
	struct workqueue c_wq;
	struct queue c_timers;
};

/* maximum number of processor cores that the kernel can support.
   TODO move to build config option */
#define CPU_MAX 128

#define this_cpu() (ml_cpu_block_get_id(ml_this_cpu()))

extern struct cpu_data *get_this_cpu(void);
extern struct cpu_data *get_cpu(unsigned int id);
extern void put_cpu(struct cpu_data *cpu);

extern bool cpu_is_available(unsigned int cpu_id);
extern bool cpu_is_online(unsigned int cpu_id);

extern void cpu_set_available(unsigned int cpu_id);
extern void cpu_set_online(unsigned int cpu_id);

extern unsigned int cpu_nr_available(void);
extern unsigned int cpu_nr_online(void);

extern cycles_t get_cycles(void);
static inline cycles_t cycles_diff(cycles_t then, cycles_t now)
{
	return now >= then ? now - then : (CYCLES_MAX - then) + now;
}

#define irq_enable() ml_int_enable()
#define irq_disable() ml_int_disable()

extern void preempt_disable(void);
extern void preempt_enable(void);
extern int preempt_count(void);

extern unsigned int cpu_get_highest_available(void);

#ifdef __cplusplus
}
#endif

#endif