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sched: Support adding timers to the start of timer_list

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If sched_add_timer() is called on a timer that would make it the new
head of the list, then add it and signal the board code that the timer
should be rescheduled.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor
2017-07-27 12:19:09 -04:00
parent 62f77f6bc5
commit 6a63c27542
7 changed files with 62 additions and 45 deletions
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26
src/pru/main.c
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@@ -51,24 +51,37 @@ irq_wait(void)
asm("slp 1");
}
// Set the next timer wake up time
static void
timer_set(uint32_t value)
{
CT_IEP.TMR_CMP0 = value;
}
// Return the next scheduled wake up time
uint32_t
timer_get_next(void)
{
return CT_IEP.TMR_CMP0;
}
// Return the current time (in absolute clock ticks).
uint32_t
timer_read_time(void)
{
return CT_IEP.TMR_CNT;
}
// Activate timer dispatch as soon as possible
void
timer_kick(void)
{
timer_set(timer_read_time() + 50);
CT_IEP.TMR_CMP_STS = 0xff;
__delay_cycles(4);
CT_INTC.SECR0 = 1 << IEP_EVENT;
}
static void
_irq_poll(void)
{
@@ -86,24 +99,13 @@ irq_poll(void)
_irq_poll();
}
void
timer_shutdown(void)
{
// Reenable timer irq
timer_set(timer_read_time() + 50);
CT_IEP.TMR_CMP_STS = 0xff;
__delay_cycles(4);
CT_INTC.SECR0 = 1 << IEP_EVENT;
}
DECL_SHUTDOWN(timer_shutdown);
void
timer_init(void)
{
CT_IEP.TMR_CMP_CFG = 0x01 << 1;
CT_IEP.TMR_GLB_CFG = 0x11;
CT_IEP.TMR_CNT = 0;
timer_shutdown();
timer_kick();
}
DECL_INIT(timer_init);