113 lines
2.3 KiB
C
113 lines
2.3 KiB
C
/* Copyright 2013 The Chromium OS Authors. All rights reserved.
|
|
* Use of this source code is governed by a BSD-style license that can be
|
|
* found in the LICENSE file.
|
|
*/
|
|
|
|
/* Timer module */
|
|
|
|
#include <stdint.h>
|
|
#include <stdio.h>
|
|
#include <time.h>
|
|
|
|
#include "task.h"
|
|
#include "test_util.h"
|
|
#include "timer.h"
|
|
#include "util.h"
|
|
|
|
/*
|
|
* For test that need to test for longer than the default time limit,
|
|
* adjust its time scale in test/build.mk by specifying
|
|
* <test_name>-scale=<new scale>.
|
|
*/
|
|
#ifndef TEST_TIME_SCALE
|
|
#define TEST_TIME_SCALE 1
|
|
#endif
|
|
|
|
/*
|
|
* To increase the stability of timing sensitive unit tests, slow
|
|
* down the time by 10x. This only affects active run time (including
|
|
* udelay() calls). To an unit test, the only effect is increased code
|
|
* execution speed. However, this comes at the cost of prolonged test
|
|
* run time for tests that use udelay(). Fortunately, most of our tests
|
|
* use usleep/msleep, and for tests that use udelay(), we can scale
|
|
* the time as mentioned above.
|
|
*/
|
|
#define TEST_TIME_SLOW_DOWN 10
|
|
|
|
static timestamp_t boot_time;
|
|
static int time_set;
|
|
|
|
void usleep(unsigned us)
|
|
{
|
|
if (!task_start_called() || task_get_current() == TASK_ID_INVALID) {
|
|
udelay(us);
|
|
return;
|
|
}
|
|
|
|
ASSERT(!in_interrupt_context() &&
|
|
task_get_current() != TASK_ID_INT_GEN);
|
|
|
|
task_wait_event(us);
|
|
}
|
|
|
|
timestamp_t _get_time(void)
|
|
{
|
|
struct timespec ts;
|
|
timestamp_t ret;
|
|
clock_gettime(CLOCK_MONOTONIC, &ts);
|
|
ret.val = (1000000000 * (uint64_t)ts.tv_sec + ts.tv_nsec) *
|
|
TEST_TIME_SCALE / 1000 / TEST_TIME_SLOW_DOWN;
|
|
return ret;
|
|
}
|
|
|
|
test_mockable timestamp_t get_time(void)
|
|
{
|
|
timestamp_t ret = _get_time();
|
|
ret.val -= boot_time.val;
|
|
return ret;
|
|
}
|
|
|
|
uint32_t __hw_clock_source_read(void)
|
|
{
|
|
return get_time().le.lo;
|
|
}
|
|
|
|
void force_time(timestamp_t ts)
|
|
{
|
|
timestamp_t now = _get_time();
|
|
boot_time.val = now.val - ts.val;
|
|
time_set = 1;
|
|
}
|
|
|
|
void udelay(unsigned us)
|
|
{
|
|
timestamp_t deadline;
|
|
|
|
if (!in_interrupt_context() && task_get_current() == TASK_ID_INT_GEN) {
|
|
interrupt_generator_udelay(us);
|
|
return;
|
|
}
|
|
|
|
deadline.val = get_time().val + us;
|
|
while (get_time().val < deadline.val)
|
|
;
|
|
}
|
|
|
|
int timestamp_expired(timestamp_t deadline, const timestamp_t *now)
|
|
{
|
|
timestamp_t now_val;
|
|
|
|
if (!now) {
|
|
now_val = get_time();
|
|
now = &now_val;
|
|
}
|
|
|
|
return ((int64_t)(now->val - deadline.val) >= 0);
|
|
}
|
|
|
|
void timer_init(void)
|
|
{
|
|
if (!time_set)
|
|
boot_time = _get_time();
|
|
}
|