Michael Wei / Mbed 2 deprecated ClockControl

see http://mbed.org/users/no2chem/notebook/mbed-clock-control--benchmarks/

Dependencies:   mbed

CoreMark/core_portme.c@0:b5d3bd64d2dc, 2010-01-24 (annotated)

Committer:
no2chem
Date:
Sun Jan 24 15:46:26 2010 +0000
Revision:
0:b5d3bd64d2dc

        

        
Who changed what in which revision?

        

            
                
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/* 





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	File : core_portme.c





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*/





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/*





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	Author : Shay Gal-On, EEMBC





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	Legal : TODO!





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*/ 





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#include "coremark.h"





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#include "core_portme.h"





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#include "mbed.h"





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#if VALIDATION_RUN





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	volatile ee_s32 seed1_volatile=0x3415;





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	volatile ee_s32 seed2_volatile=0x3415;





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	volatile ee_s32 seed3_volatile=0x66;





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#endif





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#if PERFORMANCE_RUN





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	volatile ee_s32 seed1_volatile=0x0;





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	volatile ee_s32 seed2_volatile=0x0;





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	volatile ee_s32 seed3_volatile=0x66;





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#endif





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#if PROFILE_RUN





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	volatile ee_s32 seed1_volatile=0x8;





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	volatile ee_s32 seed2_volatile=0x8;





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	volatile ee_s32 seed3_volatile=0x8;





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#endif





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	volatile ee_s32 seed4_volatile=ITERATIONS;





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	volatile ee_s32 seed5_volatile=0;





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/* Porting : Timing functions





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	How to capture time and convert to seconds must be ported to whatever is supported by the platform.





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	e.g. Read value from on board RTC, read value from cpu clock cycles performance counter etc. 





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	Sample implementation for standard time.h and windows.h definitions included.





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*/





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CORETIMETYPE barebones_clock() {





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    return clock();





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}





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/* Define : TIMER_RES_DIVIDER





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





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	Use lower values to increase resolution, but make sure that overflow does not occur.





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	If there are issues with the return value overflowing, increase this value.





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	*/





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#define GETMYTIME(_t) (*_t=barebones_clock())





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





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#define TIMER_RES_DIVIDER 1





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#define SAMPLE_TIME_IMPLEMENTATION 1





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#define EE_TICKS_PER_SEC (CLOCKS_PER_SEC / TIMER_RES_DIVIDER)





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





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static CORETIMETYPE start_time_val, stop_time_val;





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/* Function : start_time





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





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





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	or zeroing some system parameters - e.g. setting the cpu clocks cycles to 0.





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*/





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void start_time(void) {





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	GETMYTIME(&start_time_val );      





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}





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/* Function : stop_time





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





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





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	or other system parameters - e.g. reading the current value of cpu cycles counter.





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*/





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void stop_time(void) {





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	GETMYTIME(&stop_time_val );





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}





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/* Function : get_time





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





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





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





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





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	The sample implementation returns millisecs by default, 





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	and the resolution is controlled by <TIMER_RES_DIVIDER>





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*/





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CORE_TICKS get_time(void) {





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





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	return elapsed;





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}





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/* Function : time_in_secs





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	Convert the value returned by get_time to seconds.





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





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	Default implementation implemented by the EE_TICKS_PER_SEC macro above.





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*/





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secs_ret time_in_secs(CORE_TICKS ticks) {





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





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	return retval;





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}





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ee_u32 default_num_contexts=1;





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/* Function : portable_init





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	Target specific initialization code 





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	Test for some common mistakes.





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*/





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





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{





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





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





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		ee_printf("ERROR! Please define ee_ptr_int to a type that holds a pointer!\n");





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	}





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	if (sizeof(ee_u32) != 4) {





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





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	}





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	p->portable_id=1;





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}





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/* Function : portable_fini





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	Target specific final code 





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*/





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void portable_fini(core_portable *p)





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{





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	p->portable_id=0;





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}





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