147 lines
4.4 KiB
C
147 lines
4.4 KiB
C
/****************************************************************************
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* sched/clock/clock_systimer.c
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*
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* Copyright (C) 2011, 2014 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdint.h>
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#include <nuttx/arch.h>
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#include <nuttx/clock.h>
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#include "clock/clock.h"
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* See nuttx/clock.h */
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#undef clock_systimer
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: clock_systimer
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*
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* Description:
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* Return the current value of the 32-bit system timer counter
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*
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* Parameters:
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* None
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*
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* Return Value:
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* The current value of the system timer counter
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*
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* Assumptions:
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*
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****************************************************************************/
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uint32_t clock_systimer(void)
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{
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#ifdef CONFIG_SCHED_TICKLESS
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struct timespec ts;
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uint64_t tmp;
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/* Get the time from the platform specific hardware */
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(void)up_timer_gettime(&ts);
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/* Convert to a 64- then 32-bit value */
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tmp = MSEC2TICK(1000 * (uint64_t)ts.tv_sec + (uint64_t)ts.tv_nsec / 1000000);
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return (uint32_t)(tmp & 0x00000000ffffffff);
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#else
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#ifdef CONFIG_SYSTEM_TIME64
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/* Return the current system time truncated to 32-bits */
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return (uint32_t)(g_system_timer & 0x00000000ffffffff);
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#else
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/* Return the current system time */
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return g_system_timer;
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#endif
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#endif
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}
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/****************************************************************************
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* Name: clock_systimer64
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*
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* Description:
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* Return the current value of the 64-bit system timer counter
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*
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* Parameters:
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* None
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*
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* Return Value:
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* The current value of the system timer counter
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*
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* Assumptions:
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*
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****************************************************************************/
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#ifdef CONFIG_SYSTEM_TIME64
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uint64_t clock_systimer64(void)
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{
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#ifdef CONFIG_SCHED_TICKLESS
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struct timespec ts;
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/* Get the time from the platform specific hardware */
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(void)up_timer_gettime(&ts);
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/* Convert to a 64- then 32-bit value */
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return MSEC2TICK(1000 * (uint64_t)ts.tv_sec + (uint64_t)ts.tv_nsec / 1000000);
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#else
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/* Return the current system time */
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return g_system_timer;
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#endif
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}
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#endif
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