52 lines
1.0 KiB
C
52 lines
1.0 KiB
C
#include <gint/timer.h>
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#include <gint/clock.h>
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#include <gint/mpu/tmu.h>
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#include <gint/hardware.h>
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#include <libprof.h>
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/* Timer counter */
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uint32_t volatile *prof_tcnt = NULL;
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/* Timer ID */
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static int prof_timer = -1;
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/* prof_init(): Initialize the profiler's timer */
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int prof_init(void)
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{
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/* Get a TMU with the exact constant 0xffffffff */
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int timer = -1;
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for(int t = 2; t >= 0 && timer == -1; t--)
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{
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timer = timer_setup(t, 0xffffffff, NULL);
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}
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if(timer == -1)
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{
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prof_quit();
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return 1;
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}
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/* Keep the address of the TCNT register */
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prof_tcnt = isSH3()
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? &SH7705_TMU.TMU[timer].TCNT
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: &SH7305_TMU.TMU[timer].TCNT;
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timer_start(timer);
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prof_timer = timer;
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return 0;
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}
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/* prof_quit(): Free the profiler's timer */
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void prof_quit(void)
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{
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if(prof_timer >= 0) timer_stop(prof_timer);
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prof_timer = -1;
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}
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/* prof_time(): Time spent in a given context, in microseconds */
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uint32_t prof_time(prof_t prof)
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{
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int Pphi = clock_freq()->Pphi_f;
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return ((uint64_t)prof.elapsed * 4 * 1000000) / Pphi;
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}
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