* arch/risc-v/src/sg2000/sg2000_timerisr.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <assert.h>
#include <stdint.h>
#include <time.h>
#include <debug.h>
#include <nuttx/timers/arch_alarm.h>
#include "riscv_internal.h"
#include "riscv_mtimer.h"
* Pre-processor Definitions
****************************************************************************/
#define MTIMER_FREQ 25000000ul
* Public Functions
****************************************************************************/
* Name: up_timer_initialize
*
* Description:
* This function is called during start-up to initialize
* the timer interrupt.
*
****************************************************************************/
void up_timer_initialize(void)
{
struct oneshot_lowerhalf_s *lower;
* OpenSBI.
*/
lower = riscv_mtimer_initialize(0, 0, RISCV_IRQ_STIMER, MTIMER_FREQ);
DEBUGASSERT(lower != NULL);
up_alarm_set_lowerhalf(lower);
}