mirror of
https://github.com/apache/nuttx.git
synced 2026-10-09 07:15:20 +00:00
6d69439f58
Call xxx_timer_initialize from clock subsystem to make timer ready for use as soon as possiblei and revert the workaround: commit0863e771a9Author: Gregory Nutt <gnutt@nuttx.org> Date: Fri Apr 26 07:24:57 2019 -0600 Revert "sched/clock/clock_initialize.c: clock_inittime() needs to be done with CONFIG_SCHED_TICKLESS and clock_initialize should skip clock_inittime() for external RTC case since the RTC isn't ready yet." This reverts commit2bc709d4b9. Commit2bc709d4b9was intended to handle the case where up_timer_gettime may not start from zero case. However, this change has the side-effect of breaking every implementation of tickless mode: After this change the tickless timer structures are used before they are initialized in clock_inittime(). Initialization happens later when up_initialize is called() when arm_timer_initialize(). Since the tickless mode timer is very special, one solution might be to 1. Rename xxx_timer_initialize to up_timer_initialize 2 Move up_timer_initialize to include/nuttx/arch.h 3. Call it from clock subsystem instead up_initialize Basically, this change make timer initialization almost same as rtc initialization(up_rtc_initialize). For now, however, we just need to revert the change.
109 lines
3.7 KiB
C
109 lines
3.7 KiB
C
/****************************************************************************
|
|
* arch/or1k/src/common/up_timer.c
|
|
*
|
|
* Copyright (C) 2018 Extent3D. All rights reserved.
|
|
* Author: Matt Thompson <matt@extent3d.com>
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in
|
|
* the documentation and/or other materials provided with the
|
|
* distribution.
|
|
* 3. Neither the name NuttX nor the names of its contributors may be
|
|
* used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
|
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
|
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
|
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
|
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
|
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
|
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
|
|
#include <stdint.h>
|
|
#include <time.h>
|
|
#include <debug.h>
|
|
|
|
#include <nuttx/arch.h>
|
|
#include <arch/board/board.h>
|
|
#include <arch/spr.h>
|
|
|
|
#include "clock/clock.h"
|
|
#include "up_internal.h"
|
|
#include "up_arch.h"
|
|
|
|
/****************************************************************************
|
|
* Pre-processor Definitions
|
|
****************************************************************************/
|
|
|
|
#define TTMR_MATCH (CONFIG_OR1K_CPU_FREQUENCY/100)
|
|
#define TTMR_LOAD (TTMR_MATCH | SPR_TTMR_IE | SPR_TTMR_M)
|
|
|
|
/****************************************************************************
|
|
* Private Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: or1k_timer_isr
|
|
*
|
|
* Description:
|
|
* Tick Timer interrupt handler
|
|
*
|
|
****************************************************************************/
|
|
|
|
static int or1k_timer_isr(int irq, uint32_t *regs, void *arg)
|
|
{
|
|
uint32_t ttmr = TTMR_LOAD;
|
|
/* Clear the TTMR interrupt */
|
|
mtspr(SPR_TICK_TTMR, ttmr);
|
|
|
|
nxsched_process_timer();
|
|
|
|
return OK;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: up_timer_initialize
|
|
*
|
|
* Description:
|
|
* Initialize the OpenRISC Tick Timer unit
|
|
*
|
|
****************************************************************************/
|
|
|
|
void up_timer_initialize(void)
|
|
{
|
|
uint32_t ttmr = TTMR_LOAD;
|
|
|
|
irq_attach(OR1K_IRQ_TICK, (xcpt_t)or1k_timer_isr, NULL);
|
|
|
|
/* Clear TTCR */
|
|
|
|
mtspr(SPR_TICK_TTCR, 0);
|
|
|
|
/* Write TTMR */
|
|
|
|
mtspr(SPR_TICK_TTMR, ttmr);
|
|
}
|