Projet_SETI_RISC-V/bandwidth_test/mem.c

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// #################################################################################################
// # << NEORV32 - "Hello World" Demo Program >> #
// # ********************************************************************************************* #
// # BSD 3-Clause License #
// # #
// # Copyright (c) 2022, Stephan Nolting. All rights reserved. #
// # #
// # 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 of the copyright holder 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 HOLDER 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. #
// # ********************************************************************************************* #
// # The NEORV32 Processor - https://github.com/stnolting/neorv32 (c) Stephan Nolting #
// #################################################################################################
/**********************************************************************//**
* @file hello_world/main.c
* @author Stephan Nolting
* @brief Classic 'hello world' demo program.
**************************************************************************/
#include <neorv32.h>
/**********************************************************************//**
* @name User configuration
**************************************************************************/
/**@{*/
/** UART BAUD rate */
#define BAUD_RATE 19200
/**@}*/
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void fn_mem(uint32_t N, uint32_t *y){
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for(uint32_t i=0; i<N; i++){
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y[i] = N;
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}
}
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void fn_copy(uint32_t N, uint32_t *x, uint32_t *y){
for(uint32_t i=0; i<N; i++){
*x = y[i];
}
}
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/**********************************************************************//**
* Main function; prints some fancy stuff via UART.
*
* @note This program requires the UART interface to be synthesized.
*
* @return 0 if execution was successful
**************************************************************************/
int main() {
long Begin_Time, End_Time, User_Time;
uint32_t n_max;
// capture all exceptions and give debug info via UART
// this is not required, but keeps us safe
neorv32_rte_setup();
// init UART at default baud rate, no parity bits, no HW flow control
neorv32_uart0_setup(BAUD_RATE, PARITY_NONE, FLOW_CONTROL_NONE);
// check available hardware extensions and compare with compiler flags
neorv32_rte_check_isa(0); // silent = 0 -> show message if isa mismatch
// say hello
neorv32_uart0_puts("Memory management cycles measure :\n");
neorv32_uart0_printf("NEORV32: Freq = %u\n",NEORV32_SYSINFO.CLK);
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uint32_t y[1024];
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uint32_t x;
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for(n_max=0; n_max<1024+1; n_max+=128){
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Begin_Time = (long)neorv32_mtime_get_time();
for(uint32_t j=0; j<10; j++){
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fn_mem(n_max, y);
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}
End_Time = (long)neorv32_mtime_get_time();
User_Time = End_Time - Begin_Time;
neorv32_uart0_printf("NEORV32: Memory mean cycles N = %u : %u\n",n_max, (uint32_t)User_Time/10);
Begin_Time = (long)neorv32_mtime_get_time();
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for(uint32_t j=0; j<10; j++){
fn_copy(n_max, &x, y);
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}
End_Time = (long)neorv32_mtime_get_time();
User_Time = End_Time - Begin_Time;
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neorv32_uart0_printf("NEORV32: Copy mean cycles N = %u : %u\n",n_max, (uint32_t)User_Time/10);
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}
neorv32_uart0_puts("end:\n");
return 0;
}