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/* Copyright (c) 2013, Linaro Limited
* All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <odp_posix_extensions.h>
#include <time.h>
#include <odp/api/time.h>
#include <odp/api/hints.h>
#include <odp_debug_internal.h>
#include <odp_time_internal.h>
#include <string.h>
#include <inttypes.h>
typedef struct time_global_t {
struct timespec spec_start;
int use_hw;
uint64_t hw_start;
uint64_t hw_freq_hz;
} time_global_t;
static time_global_t global;
/*
* Posix timespec based functions
*/
static inline uint64_t time_spec_diff_nsec(struct timespec *t2,
struct timespec *t1)
{
struct timespec diff;
uint64_t nsec;
diff.tv_sec = t2->tv_sec - t1->tv_sec;
diff.tv_nsec = t2->tv_nsec - t1->tv_nsec;
if (diff.tv_nsec < 0) {
diff.tv_nsec += ODP_TIME_SEC_IN_NS;
diff.tv_sec -= 1;
}
nsec = (diff.tv_sec * ODP_TIME_SEC_IN_NS) + diff.tv_nsec;
return nsec;
}
static inline odp_time_t time_spec_cur(void)
{
int ret;
odp_time_t time;
struct timespec sys_time;
ret = clock_gettime(CLOCK_MONOTONIC_RAW, &sys_time);
if (odp_unlikely(ret != 0))
ODP_ABORT("clock_gettime failed\n");
time.nsec = time_spec_diff_nsec(&sys_time, &global.spec_start);
return time;
}
static inline uint64_t time_spec_res(void)
{
int ret;
struct timespec tres;
ret = clock_getres(CLOCK_MONOTONIC_RAW, &tres);
if (odp_unlikely(ret != 0))
ODP_ABORT("clock_getres failed\n");
return ODP_TIME_SEC_IN_NS / (uint64_t)tres.tv_nsec;
}
static inline uint64_t time_spec_to_ns(odp_time_t time)
{
return time.nsec;
}
static inline odp_time_t time_spec_from_ns(uint64_t ns)
{
odp_time_t time;
time.nsec = ns;
return time;
}
/*
* HW time counter based functions
*/
static inline odp_time_t time_hw_cur(void)
{
odp_time_t time;
time.count = cpu_global_time() - global.hw_start;
return time;
}
static inline uint64_t time_hw_res(void)
{
return global.hw_freq_hz;
}
static inline uint64_t time_hw_to_ns(odp_time_t time)
{
uint64_t nsec;
uint64_t freq_hz = global.hw_freq_hz;
uint64_t count = time.count;
uint64_t sec = 0;
if (count >= freq_hz) {
sec = count / freq_hz;
count = count - sec * freq_hz;
}
nsec = (ODP_TIME_SEC_IN_NS * count) / freq_hz;
return (sec * ODP_TIME_SEC_IN_NS) + nsec;
}
static inline odp_time_t time_hw_from_ns(uint64_t ns)
{
odp_time_t time;
uint64_t count;
uint64_t freq_hz = global.hw_freq_hz;
uint64_t sec = 0;
if (ns >= ODP_TIME_SEC_IN_NS) {
sec = ns / ODP_TIME_SEC_IN_NS;
ns = ns - sec * ODP_TIME_SEC_IN_NS;
}
count = sec * freq_hz;
count += (ns * freq_hz) / ODP_TIME_SEC_IN_NS;
time.count = count;
return time;
}
/*
* Common functions
*/
static inline odp_time_t time_cur(void)
{
if (global.use_hw)
return time_hw_cur();
return time_spec_cur();
}
static inline uint64_t time_res(void)
{
if (global.use_hw)
return time_hw_res();
return time_spec_res();
}
static inline int time_cmp(odp_time_t t2, odp_time_t t1)
{
if (odp_likely(t2.u64 > t1.u64))
return 1;
if (t2.u64 < t1.u64)
return -1;
return 0;
}
static inline odp_time_t time_sum(odp_time_t t1, odp_time_t t2)
{
odp_time_t time;
time.u64 = t1.u64 + t2.u64;
return time;
}
static inline uint64_t time_to_ns(odp_time_t time)
{
if (global.use_hw)
return time_hw_to_ns(time);
return time_spec_to_ns(time);
}
static inline odp_time_t time_from_ns(uint64_t ns)
{
if (global.use_hw)
return time_hw_from_ns(ns);
return time_spec_from_ns(ns);
}
static inline void time_wait_until(odp_time_t time)
{
odp_time_t cur;
do {
cur = time_cur();
} while (time_cmp(time, cur) > 0);
}
odp_time_t odp_time_local(void)
{
return time_cur();
}
odp_time_t odp_time_global(void)
{
return time_cur();
}
odp_time_t odp_time_diff(odp_time_t t2, odp_time_t t1)
{
odp_time_t time;
time.u64 = t2.u64 - t1.u64;
return time;
}
uint64_t odp_time_to_ns(odp_time_t time)
{
return time_to_ns(time);
}
odp_time_t odp_time_local_from_ns(uint64_t ns)
{
return time_from_ns(ns);
}
odp_time_t odp_time_global_from_ns(uint64_t ns)
{
return time_from_ns(ns);
}
int odp_time_cmp(odp_time_t t2, odp_time_t t1)
{
return time_cmp(t2, t1);
}
odp_time_t odp_time_sum(odp_time_t t1, odp_time_t t2)
{
return time_sum(t1, t2);
}
uint64_t odp_time_local_res(void)
{
return time_res();
}
uint64_t odp_time_global_res(void)
{
return time_res();
}
void odp_time_wait_ns(uint64_t ns)
{
odp_time_t cur = time_cur();
odp_time_t wait = time_from_ns(ns);
odp_time_t end_time = time_sum(cur, wait);
time_wait_until(end_time);
}
void odp_time_wait_until(odp_time_t time)
{
return time_wait_until(time);
}
int odp_time_init_global(void)
{
int ret = 0;
memset(&global, 0, sizeof(time_global_t));
if (cpu_has_global_time()) {
global.use_hw = 1;
global.hw_freq_hz = cpu_global_time_freq();
if (global.hw_freq_hz == 0)
return -1;
printf("HW time counter freq: %" PRIu64 " hz\n\n",
global.hw_freq_hz);
global.hw_start = cpu_global_time();
return 0;
}
global.spec_start.tv_sec = 0;
global.spec_start.tv_nsec = 0;
ret = clock_gettime(CLOCK_MONOTONIC_RAW, &global.spec_start);
return ret;
}
int odp_time_term_global(void)
{
return 0;
}
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