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[cputime] suuport perf_counter

This commit is contained in:
Meco Man 2022-06-14 06:50:31 -04:00 committed by guo
parent b010e434ed
commit 808259135f
2 changed files with 16 additions and 7 deletions
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8
components/drivers/Kconfig
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@ -79,12 +79,10 @@ config RT_USING_CPUTIME
if RT_USING_CPUTIME if RT_USING_CPUTIME
config RT_USING_CPUTIME_CORTEXM config RT_USING_CPUTIME_CORTEXM
bool "Use DWT for CPU time" bool "Support Cortex-M CPU"
default y default y
depends on ARCH_ARM_CORTEX_M3 || ARCH_ARM_CORTEX_M4 || ARCH_ARM_CORTEX_M7 depends on ARCH_ARM_CORTEX_M0 || ARCH_ARM_CORTEX_M3 || ARCH_ARM_CORTEX_M4 || ARCH_ARM_CORTEX_M7
help select PKG_USING_PERF_COUNTER
Some Cortex-M3/4/7 MCU has Data Watchpoint and Trace Register, use
the cycle counter in DWT for CPU time.
endif endif
config RT_USING_I2C config RT_USING_I2C

15
components/drivers/cputime/cputime_cortexm.c
View File

@ -6,6 +6,7 @@
* Change Logs: * Change Logs:
* Date Author Notes * Date Author Notes
* 2017-12-23 Bernard first version * 2017-12-23 Bernard first version
* 2022-06-14 Meco Man suuport pref_counter
*/ */
#include <rthw.h> #include <rthw.h>
@ -13,9 +14,11 @@
#include <rtthread.h> #include <rtthread.h>
#include <board.h> #include <board.h>
#ifdef PKG_USING_PERF_COUNTER
#include <perf_counter.h>
#endif
/* Use Cycle counter of Data Watchpoint and Trace Register for CPU time */ /* Use Cycle counter of Data Watchpoint and Trace Register for CPU time */
static float cortexm_cputime_getres(void) static float cortexm_cputime_getres(void)
{ {
float ret = 1000 * 1000 * 1000; float ret = 1000 * 1000 * 1000;
@ -26,7 +29,11 @@ static float cortexm_cputime_getres(void)
static uint64_t cortexm_cputime_gettime(void) static uint64_t cortexm_cputime_gettime(void)
{ {
#ifdef PKG_USING_PERF_COUNTER
return get_system_ticks();
#else
return DWT->CYCCNT; return DWT->CYCCNT;
#endif
} }
const static struct rt_clock_cputime_ops _cortexm_ops = const static struct rt_clock_cputime_ops _cortexm_ops =
@ -35,8 +42,12 @@ const static struct rt_clock_cputime_ops _cortexm_ops =
cortexm_cputime_gettime cortexm_cputime_gettime
}; };
int cortexm_cputime_init(void) int cortexm_cputime_init(void)
{ {
#ifdef PKG_USING_PERF_COUNTER
clock_cpu_setops(&_cortexm_ops);
#else
/* check support bit */ /* check support bit */
if ((DWT->CTRL & (1UL << DWT_CTRL_NOCYCCNT_Pos)) == 0) if ((DWT->CTRL & (1UL << DWT_CTRL_NOCYCCNT_Pos)) == 0)
{ {
@ -52,7 +63,7 @@ int cortexm_cputime_init(void)
clock_cpu_setops(&_cortexm_ops); clock_cpu_setops(&_cortexm_ops);
} }
#endif /* PKG_USING_PERF_COUNTER */
return 0; return 0;
} }
INIT_BOARD_EXPORT(cortexm_cputime_init); INIT_BOARD_EXPORT(cortexm_cputime_init);