rte_cycles.h

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/*-
 *   BSD LICENSE
 *
 *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
 *   Copyright(c) 2013 6WIND.
 *   All rights reserved.
 *
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 *   modification, are permitted provided that the following conditions
 *   are met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
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 *       notice, this list of conditions and the following disclaimer in
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 *       distribution.
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#ifndef _RTE_CYCLES_H_
#define _RTE_CYCLES_H_

#include <stdint.h>
#include <rte_debug.h>
#include <rte_atomic.h>

#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_callback_register(void(*userfunc)(unsigned int));

#endif /* _RTE_CYCLES_H_ */