Firmwares/benchmarks/coremark/core_portme.c

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2023-08-20 15:00:51 +02:00
/*
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
*/
#include "coremark.h"
#include "core_portme.h"
//Read cycle CSR
unsigned long long _read_cycle()
{
unsigned long long result;
unsigned long lower;
unsigned long upper1;
unsigned long upper2;
asm volatile (
"repeat_cycle_%=: csrr %0, cycleh;\n"
" csrr %1, cycle;\n"
" csrr %2, cycleh;\n"
" bne %0, %2, repeat_cycle_%=;\n"
: "=r" (upper1),"=r" (lower),"=r" (upper2) // Outputs : temp variable for load result
:
:
);
*(unsigned long *)(&result) = lower;
*((unsigned long *)(&result)+1) = upper1;
return result;
}
volatile int tohost;
volatile int fromhost;
void exit(int n){
tohost = 0x1;
for (;;);
}
void __libc_init_array (void) {
/*
size_t count;
size_t i;
count = __preinit_array_end - __preinit_array_start;
for (i = 0; i < count; i++)
__preinit_array_start[i] ();
#ifdef HAVE_INIT_FINI
_init ();
#endif
count = __init_array_end - __init_array_start;
for (i = 0; i < count; i++)
__init_array_start[i] ();
*/
}
#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()
{
return (CORETIMETYPE)_read_cycle();
}
/* 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 = barebones_clock())
#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)
{
secs_ret retval = ((secs_ret)ticks) / (secs_ret)EE_TICKS_PER_SEC;
return retval;
}
ee_u32 default_num_contexts = 1;
/* Function : portable_init
Target specific initialization code
Test for some common mistakes.
*/
void
portable_init(core_portable *p, int *argc, char *argv[])
{
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;
ee_printf("portable_init finished.\n");
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}
/* Function : portable_fini
Target specific final code
*/
void
portable_fini(core_portable *p)
{
p->portable_id = 0;
}