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/*

Copyright 2018 Embedded Microprocessor Benchmark Consortium (EEMBC)

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.

Original Author: Shay Gal-on

*/

/* Modified for the NEORV32 Processor - by Stephan Nolting */

#include "coremark.h"

#include "core_portme.h"

#if VALIDATION_RUN

volatile ee_s32 seed1_volatile = 0x3415;

volatile ee_s32 seed2_volatile = 0x3415;

volatile ee_s32 seed3_volatile = 0x66;

#endif

#if PERFORMANCE_RUN

volatile ee_s32 seed1_volatile = 0x0;

volatile ee_s32 seed2_volatile = 0x0;

volatile ee_s32 seed3_volatile = 0x66;

#endif

#if PROFILE_RUN

volatile ee_s32 seed1_volatile = 0x8;

volatile ee_s32 seed2_volatile = 0x8;

volatile ee_s32 seed3_volatile = 0x8;

#endif

volatile ee_s32 seed4_volatile = ITERATIONS;

volatile ee_s32 seed5_volatile = 0;

/* Porting : Timing functions

        How to capture time and convert to seconds must be ported to whatever is

   supported by the platform. e.g. Read value from on board RTC, read value from

   cpu clock cycles performance counter etc. Sample implementation for standard

   time.h and windows.h definitions included.

*/

CORETIMETYPE

barebones_clock()

{

/*

#error \

    "You must implement a method to measure time in barebones_clock()! This function should return current time.\n"

*/

  return 0;

}

/* Define : TIMER_RES_DIVIDER

        Divider to trade off timer resolution and total time that can be

   measured.

        Use lower values to increase resolution, but make sure that overflow

   does not occur. If there are issues with the return value overflowing,

   increase this value.

        */

#define GETMYTIME(_t)              (*_t = (CORETIMETYPE)neorv32_cpu_get_cycle())

#define MYTIMEDIFF(fin, ini)       ((fin) - (ini))

#define TIMER_RES_DIVIDER          1

#define SAMPLE_TIME_IMPLEMENTATION 1

#define EE_TICKS_PER_SEC           (CLOCKS_PER_SEC / TIMER_RES_DIVIDER)

/** Define Host specific (POSIX), or target specific global time variables. */

static CORETIMETYPE start_time_val, stop_time_val;

/* Function : start_time

        This function will be called right before starting the timed portion of

   the benchmark.

        Implementation may be capturing a system timer (as implemented in the

   example code) or zeroing some system parameters - e.g. setting the cpu clocks

   cycles to 0.

*/

void

start_time(void)

{

    GETMYTIME(&start_time_val);

}

/* Function : stop_time

        This function will be called right after ending the timed portion of the

   benchmark.

        Implementation may be capturing a system timer (as implemented in the

   example code) or other system parameters - e.g. reading the current value of

   cpu cycles counter.

*/

void

stop_time(void)

{

    GETMYTIME(&stop_time_val);

}

/* Function : get_time

        Return an abstract "ticks" number that signifies time on the system.

        Actual value returned may be cpu cycles, milliseconds or any other

   value, as long as it can be converted to seconds by <time_in_secs>. This

   methodology is taken to accomodate any hardware or simulated platform. The

   sample implementation returns millisecs by default, and the resolution is

   controlled by <TIMER_RES_DIVIDER>

*/

CORE_TICKS

get_time(void)

{

    CORE_TICKS elapsed

        = (CORE_TICKS)(MYTIMEDIFF(stop_time_val, start_time_val));

    return elapsed;

}

/* Function : time_in_secs

        Convert the value returned by get_time to seconds.

        The <secs_ret> type is used to accomodate systems with no support for

   floating point. Default implementation implemented by the EE_TICKS_PER_SEC

   macro above.

*/

secs_ret

time_in_secs(CORE_TICKS ticks)

{

    /* NEORV32-specific */

    secs_ret retval = ((secs_ret)ticks) / (secs_ret)SYSINFO_CLK;

    return retval;

}

ee_u32 default_num_contexts = 1;

/* Function : portable_init

        Target specific initialization code

        Test for some common mistakes.

*/

#ifndef RUN_COREMARK

void

__attribute__((__noreturn__))

portable_init(core_portable *p, int *argc, char *argv[])

#else

void

portable_init(core_portable *p, int *argc, char *argv[])

#endif

{

  /* NEORV32-specific */

  neorv32_cpu_dint(); // no interrupt, thanks

  neorv32_rte_setup(); // capture all exceptions and give debug information

  neorv32_uart_setup(BAUD_RATE, 0, 0); // setup UART

// Disable coremark compilation by default

#ifndef RUN_COREMARK

  #warning COREMARK HAS NOT BEEN COMPILED! Use >>make USER_FLAGS+=-DRUN_COREMARK clean_all exe<< to compile it.

  // inform the user if you are actually executing this

  neorv32_uart_printf("ERROR! CoreMark has not been compiled. Use >>make USER_FLAGS+=-DRUN_COREMARK clean_all exe<< to compile it.\n");

  while(1);

#endif

  neorv32_uart_printf("NEORV32: Processor running at %u Hz\n", (uint32_t)SYSINFO_CLK);

  neorv32_uart_printf("NEORV32: Executing coremark (%u iterations). This may take some time...\n\n", (uint32_t)ITERATIONS);

/*

#error \

    "Call board initialization routines in portable init (if needed), in particular initialize UART!\n"

*/

    if (sizeof(ee_ptr_int) != sizeof(ee_u8 *))

    {

        ee_printf(

            "ERROR! Please define ee_ptr_int to a type that holds a "

            "pointer!\n");

    }

    if (sizeof(ee_u32) != 4)

    {

        ee_printf("ERROR! Please define ee_u32 to a 32b unsigned type!\n");

    }

    p->portable_id = 1;

#ifndef RUN_COREMARK

  while(1);

#endif

}

/* Function : portable_fini

        Target specific final code

*/

void

portable_fini(core_portable *p)

{

    p->portable_id = 0;

  /* NORV§"-specific */

  // show executed instructions, required cycles and resulting average CPI

  union {

    uint64_t uint64;

    uint32_t  uint32[sizeof(uint64_t)/2];

  } exe_instructions, exe_time;

  exe_time.uint64 = (uint64_t)get_time();

  exe_instructions.uint64 = neorv32_cpu_get_instret();

  neorv32_uart_printf("\nNEORV32: All reported numbers only show the integer results.\n\n");

  neorv32_uart_printf("NEORV32: Executed instructions      0x%x_%x\n", (uint32_t)exe_instructions.uint32[1], (uint32_t)exe_instructions.uint32[0]);

  neorv32_uart_printf("NEORV32: CoreMark core clock cycles 0x%x_%x\n", (uint32_t)exe_time.uint32[1], (uint32_t)exe_time.uint32[0]);

  uint64_t average_cpi_int = exe_time.uint64 / exe_instructions.uint64;

  neorv32_uart_printf("NEORV32: Average CPI (integer part only): %u cycles/instruction\n", (uint32_t)average_cpi_int);

}