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e24fa592d2
source files mainly done by Vincent. Signed-off-by: Vincent Palatin <vpalatin@chromium.org> Change-Id: Ic2d1becd400c9b4b4a14d4a243af1bdf77d9c1e2
61 lines
1.3 KiB
C
61 lines
1.3 KiB
C
/* Copyright (c) 2011 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 for Chrome EC operating system */
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#ifndef __EC_TIMER_H
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#define __EC_TIMER_H
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#include "common.h"
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#include "task_id.h"
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/* Micro-second timestamp. */
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typedef union {
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uint64_t val;
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struct {
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uint32_t lo;
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uint32_t hi;
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} le /* little endian words */;
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} timestamp_t;
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/* Initializes the Timer module. */
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int timer_init(void);
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/**
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* Launches a one-shot timer.
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*
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* tstamp : timestamp in micro-seconds when the timer expires
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* tskid : identifier of the task owning the timer
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*/
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int timer_arm(timestamp_t tstamp, task_id_t tskid);
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/**
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* Cancels a running timer.
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*
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* tskid : identifier of the task owning the timer
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*/
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int timer_cancel(task_id_t tskid);
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/**
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* Busy wait the selected number of micro-seconds
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*/
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void udelay(unsigned us);
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/**
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* Sleep during the selected number of micro-seconds
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*
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* The current task will be de-scheduled until the delay expired
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*
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* Note: if an event happens before the end of sleep, the function will return.
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*/
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void usleep(unsigned us);
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/**
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* Get the current timestamp from the system timer
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*/
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timestamp_t get_time(void);
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#endif /* __EC_TIMER_H */
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