rte_cycles.h

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/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright(c) 2010-2014 Intel Corporation.
 * Copyright(c) 2013 6WIND S.A.
 */
 
#ifndef _RTE_CYCLES_H_
#define _RTE_CYCLES_H_

 
#include <stdint.h>
#include <rte_debug.h>
#include <rte_atomic.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
#define MS_PER_S 1000
#define US_PER_S 1000000
#define NS_PER_S 1000000000
 
enum timer_source {
    EAL_TIMER_TSC = 0,
    EAL_TIMER_HPET
};
extern enum timer_source eal_timer_source;

uint64_t
rte_get_tsc_hz(void);

static inline uint64_t
rte_get_tsc_cycles(void);
 
#ifdef RTE_LIBEAL_USE_HPET
uint64_t
rte_get_hpet_cycles(void);

uint64_t
rte_get_hpet_hz(void);

int rte_eal_hpet_init(int make_default);
 
#endif

static inline uint64_t
rte_get_timer_cycles(void)
{
#ifdef RTE_LIBEAL_USE_HPET
    switch(eal_timer_source) {
    case EAL_TIMER_TSC:
#endif
        return rte_get_tsc_cycles();
#ifdef RTE_LIBEAL_USE_HPET
    case EAL_TIMER_HPET:
        return rte_get_hpet_cycles();
    default: rte_panic("Invalid timer source specified\n");
    }
#endif
}

static inline uint64_t
rte_get_timer_hz(void)
{
#ifdef RTE_LIBEAL_USE_HPET
    switch(eal_timer_source) {
    case EAL_TIMER_TSC:
#endif
        return rte_get_tsc_hz();
#ifdef RTE_LIBEAL_USE_HPET
    case EAL_TIMER_HPET:
        return rte_get_hpet_hz();
    default: rte_panic("Invalid timer source specified\n");
    }
#endif
}

extern void
(*rte_delay_us)(unsigned int us);

static inline void
rte_delay_ms(unsigned ms)
{
    rte_delay_us(ms * 1000);
}

void rte_delay_us_block(unsigned int us);

void rte_delay_us_sleep(unsigned int us);

void rte_delay_us_callback_register(void(*userfunc)(unsigned int));
 
#ifdef __cplusplus
}
#endif
 
#endif /* _RTE_CYCLES_H_ */