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/*
* Copyright (c) 2021 Arm Limited. All rights reserved.
* SPDX-License-Identifier: Apache-2.0
*
* Licensed 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 TIMER_MPS3_H
#define TIMER_MPS3_H
#include <stdint.h>
#include <time.h>
/* Container for timestamp up-counters. */
typedef struct _mps3_time_counter {
uint32_t counter_1Hz;
uint32_t counter_100Hz;
/* Running at FPGA clock rate. See GetMPS3CoreClock(). */
uint32_t counter_fpga;
/* Running at processor core's internal clock rate, triggered by SysTick. */
uint64_t counter_systick;
} mps3_time_counter;
/**
* @brief Resets the counters.
*/
void timer_reset(void);
/**
* @brief Gets the current counter values.
* @returns Mps3 timer counter.
**/
mps3_time_counter get_time_counter(void);
/**
* @brief Gets the duration elapsed between two counters in milliseconds.
* @param[in] start Pointer to mps3_time_counter value at start time.
* @param[in] end Pointer to mps3_time_counter value at end.
* @returns Difference in milliseconds between the two give counters
* expressed as an unsigned integer.
**/
uint32_t get_duration_milliseconds(mps3_time_counter *start,
mps3_time_counter *end);
/**
* @brief Gets the duration elapsed between two counters in microseconds.
* @param[in] start Pointer to mps3_time_counter value at start time.
* @param[in] end Pointer to mps3_time_counter value at end.
* @returns Difference in microseconds between the two give counters
* expressed as an unsigned integer.
**/
uint32_t get_duration_microseconds(mps3_time_counter *start,
mps3_time_counter *end);
/**
* @brief Gets the cycle counts elapsed between start and end.
* @param[in] start Pointer to mps3_time_counter value at start time.
* @param[in] end Pointer to mps3_time_counter value at end.
* @return Difference in counter values as 32 bit unsigned integer.
**/
uint64_t get_cycle_count_diff(mps3_time_counter *start,
mps3_time_counter *end);
/**
* @brief Enables or triggers cycle counting mechanism, if required
* by the platform.
**/
void start_cycle_counter(void);
/**
* @brief Stops cycle counting mechanism, if required by the platform.
**/
void stop_cycle_counter(void);
#endif /* TIMER_MPS3_H */
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