Unverified Commit 4cdc1b29 authored by Birte Kristina Friesel's avatar Birte Kristina Friesel
Browse files

POSIX counter: add TSC support

parent 6c60d211

include/arch/posix/driver/counter.h

+18 −1
Original line number Diff line number Diff line
@@ -9,13 +9,21 @@ 
#include <stdint.h>

#include <time.h>



typedef int64_t counter_value_t;

#ifdef CONFIG_arch_posix_driver_counter_tsc

#include <x86intrin.h>

#endif



typedef uint64_t counter_value_t;

typedef uint8_t counter_overflow_t;



class Counter {

	private:

		Counter(const Counter &copy);

#ifdef CONFIG_arch_posix_driver_counter_tsc

		uint64_t start_tsc;

#else

		int64_t start_sec, start_nsec;

#endif



	public:

		uint64_t value;
@@ -24,18 +32,27 @@ class Counter { 
		Counter() : overflow(0) {}



		inline void start() {

#ifdef CONFIG_arch_posix_driver_counter_tsc

			start_tsc = __rdtsc();

#else

			struct timespec ts;

			clock_gettime(CLOCK_MONOTONIC, &ts);

			start_sec = ts.tv_sec;

			start_nsec = ts.tv_nsec;

#endif

		}



		inline void stop() {

#ifdef CONFIG_arch_posix_driver_counter_tsc

			uint64_t stop_tsc = __rdtsc();

			value = stop_tsc - start_tsc;

#else

			struct timespec ts;

			clock_gettime(CLOCK_MONOTONIC, &ts);



			value = (ts.tv_sec - start_sec) * 1000000000L;

			value += ts.tv_nsec - start_nsec;

#endif

		}

};

src/arch/posix/Kconfig

+4 −0
Original line number Diff line number Diff line
@@ -8,6 +8,10 @@ config arch_posix_driver_counter 
bool "Cycle counter"

select meta_driver_counter



config arch_posix_driver_counter_tsc

bool "Use TSC (x86 only)"

depends on arch_posix_driver_counter



config arch_posix_driver_i2c

bool "I2C via /dev/i2c"

select meta_driver_hardware_i2c