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