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bsps/leon3: Make GPTIMER fall back mandatory

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Using the auto reload counter which generates the clock ticks for the
timecounter or CPU counter is quite difficult and only works in
uniprocessor configurations.

Update #4954.
This commit is contained in:
Sebastian Huber
2023-09-15 11:11:31 +02:00
parent b6dc4b4707
commit 3f03a6d2ef
5 changed files with 43 additions and 60 deletions
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35
bsps/sparc/leon3/clock/ckinit.c
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@@ -69,19 +69,6 @@ static struct timecounter leon3_tc;
static void leon3_tc_tick_default(void)
{
#if !defined(RTEMS_SMP)
SPARC_Counter *counter;
rtems_interrupt_level level;
counter = &_SPARC_Counter;
rtems_interrupt_local_disable(level);
grlib_store_32(&LEON3_IrqCtrl_Regs->iclear, counter->pending_mask);
counter->accumulated += counter->interval;
rtems_interrupt_local_enable(level);
#endif
rtems_timecounter_tick();
}
@@ -238,29 +225,11 @@ static void leon3_clock_use_gptimer(
gptimer_timer *timer
)
{
#ifdef RTEMS_SMP
/*
* The GR712RC for example has no timestamp unit in the interrupt
* controller. At least on SMP configurations we must use a second timer
* in free running mode for the timecounter. The timer is initialized by
* leon3_counter_initialize().
* As a fall back, use a second timer in free-running mode for the
* timecounter. The timer is initialized by leon3_counter_initialize().
*/
tc->tc_get_timecount = _SPARC_Get_timecount_down;
#else
SPARC_Counter *counter;
counter = &_SPARC_Counter;
counter->read_isr_disabled = _SPARC_Counter_read_clock_isr_disabled;
counter->read = _SPARC_Counter_read_clock;
counter->counter_register = &timer->tcntval;
counter->pending_register = &LEON3_IrqCtrl_Regs->ipend;
counter->pending_mask = UINT32_C(1) << clkirq;
counter->accumulated = rtems_configuration_get_microseconds_per_tick();
counter->interval = rtems_configuration_get_microseconds_per_tick();
tc->tc_get_timecount = _SPARC_Get_timecount_clock;
#endif
tc->tc_frequency = LEON3_GPTIMER_0_FREQUENCY_SET_BY_BOOT_LOADER,
rtems_timecounter_install(tc);