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a02d7fa148
If the task scheduler hasn't started yet, use udelay() for any call to usleep(). This is what we do for real core now. BUG=chrome-os-partner:19235 TEST=Call usleep() in init hook BRANCH=None Change-Id: Ia5d14ee165ab25bfa231497af1aa8c87fbc324f0 Signed-off-by: Vic (Chun-Ju) Yang <victoryang@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/183271 Reviewed-by: Yung-chieh Lo <yjlou@chromium.org>
97 lines
1.7 KiB
C
97 lines
1.7 KiB
C
/* Copyright (c) 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 10 seconds, adjust
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* 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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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()) {
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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;
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return ret;
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}
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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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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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