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xtensa: add perf counter

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Signed-off-by: zhuyanlin <zhuyanlin1@xiaomi.com>
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zhuyanlin 2022-04-25 14:52:35 +08:00 committed by Petro Karashchenko
parent d8b97d7ae8
commit b71a1f77c3
1 changed files with 63 additions and 0 deletions
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63
arch/xtensa/src/common/xtensa_perf.c Normal file
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/****************************************************************************
* arch/xtensa/src/common/xtensa_perf.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/arch.h>
#include <nuttx/clock.h>
#include "xtensa_counter.h"
#include "xtensa.h"
/****************************************************************************
* Private Data
****************************************************************************/
static uint32_t g_cpu_freq;
/****************************************************************************
* Public Functions
****************************************************************************/
void up_perf_init(void *arg)
{
g_cpu_freq = (uint32_t)(uintptr_t)arg;
}
uint32_t up_perf_getfreq(void)
{
return g_cpu_freq;
}
uint32_t up_perf_gettime(void)
{
return xtensa_getcount();
}
void up_perf_convert(uint32_t elapsed, struct timespec *ts)
{
uint32_t left;
ts->tv_sec = elapsed / g_cpu_freq;
left = elapsed - ts->tv_sec * g_cpu_freq;
ts->tv_nsec = NSEC_PER_SEC * (uint64_t)left / g_cpu_freq;
}