* arch/xtensa/src/common/xtensa_counter.h
*
* 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.
*
****************************************************************************/
#ifndef __ARCH_XTENSA_SRC_COMMON_XTENSA_COUNTER_H
#define __ARCH_XTENSA_SRC_COMMON_XTENSA_COUNTER_H
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdint.h>
#include "xtensa_timer.h"
* Inline functions
****************************************************************************/
* Name: xtensa_getcount
*
* Description:
* Get the current value of the cycle count register.
*
****************************************************************************/
static inline uint32_t xtensa_getcount(void)
{
uint32_t count;
__asm__ __volatile__
(
"rsr %0, CCOUNT" : "=r"(count)
);
return count;
}
* Name: xtensa_setcount
*
* Description:
* Set the value of the cycle count register.
*
****************************************************************************/
static inline void xtensa_setcount(uint32_t ticks)
{
__asm__ __volatile__
(
"wsr %0, ccount\n"
:
: "a"(ticks)
: "memory"
);
}
* Name: xtensa_getcompare
*
* Description:
* Get the old value of the compare register.
*
****************************************************************************/
static inline uint32_t xtensa_getcompare(void)
{
uint32_t compare;
__asm__ __volatile__
(
"rsr %0, %1" : "=r"(compare) : "i"(XT_CCOMPARE)
);
return compare;
}
* Name: xtensa_getcompare
*
* Description:
* Set the value of the compare register.
*
****************************************************************************/
static inline void xtensa_setcompare(uint32_t compare)
{
__asm__ __volatile__
(
"wsr %0, %1" : : "r"(compare), "i"(XT_CCOMPARE)
);
}
#endif