sched/sched: Remove nxsched_alarm_expiration

This commit removed nxsched_alarm_expiration to simplify the timer
expiration.

Signed-off-by: ouyangxiangzhen <ouyangxiangzhen@xiaomi.com>

Documentation/reference/os/nuttx.rst

@@ -32,16 +32,6 @@ OS List Management APIs
   **Assumptions**: Base code implementation assumes that this
   function is called from interrupt handling logic with interrupts disabled.
 
-.. c:function:: void nxsched_alarm_expiration(void);
-
-  If ``CONFIG_SCHED_TICKLESS`` is defined, then this
-  function is provided by the RTOS base code and called from
-  platform-specific code when the interval timer used to implemented
-  the tick-less OS expires.
-
-  **Assumptions**: Base code implementation assumes that this
-  function is called from interrupt handling logic with interrupts disabled.
-
 .. c:function:: void irq_dispatch(int irq, FAR void *context)
 
   This function must be called from the

Documentation/reference/os/time_clock.rst

@@ -372,7 +372,6 @@ In addition to these imported interfaces, the RTOS will export the
 following interfaces for use by the platform-specific interval
 timer implementation:
 
-- ``nxsched_alarm_expiration()``: called by the platform-specific logic when the alarm expires.
 - ``nxsched_timer_expiration()``: called by the platform-specific logic when the interval time expires.
 
 .. c:function:: void archname_timer_initialize(void)

arch/arm/src/imxrt/imxrt_tickless.c

@@ -168,7 +168,6 @@ static uint64_t imxrt_get_counter(void)
 
 static void imxrt_interval_handler(void)
 {
-  struct timespec tv;
   uint32_t regval;
 
   /* Disable the compare interrupt for now */
@@ -184,8 +183,7 @@ static void imxrt_interval_handler(void)
 
   g_tickless.pending = false;
 
-  up_timer_gettime(&tv);
-  nxsched_alarm_expiration(&tv);
+  nxsched_timer_expiration();
 }
 
 /****************************************************************************
@@ -479,7 +477,7 @@ int up_timer_gettime(struct timespec *ts)
  * Name: up_alarm_start
  *
  * Description:
- *   Start the alarm.  nxsched_alarm_expiration() will be called when the
+ *   Start the alarm.  nxsched_timer_expiration() will be called when the
  *   alarm occurs (unless up_alaram_cancel is called to stop it).
  *
  *   Provided by platform-specific code and called from the RTOS base code.
@@ -487,7 +485,7 @@ int up_timer_gettime(struct timespec *ts)
  * Input Parameters:
  *   ts - The time in the future at the alarm is expected to occur.  When
  *        the alarm occurs the timer logic will call
- *        nxsched_alarm_expiration().
+ *        nxsched_timer_expiration().
  *
  * Returned Value:
  *   Zero (OK) is returned on success; a negated errno value is returned on
@@ -555,7 +553,7 @@ int up_alarm_start(const struct timespec *ts)
  * Description:
  *   Cancel the alarm and return the time of cancellation of the alarm.
  *   These two steps need to be as nearly atomic as possible.
- *   nxsched_alarm_expiration() will not be called unless the alarm is
+ *   nxsched_timer_expiration() will not be called unless the alarm is
  *   restarted with up_alarm_start().
  *
  *   If, as a race condition, the alarm has already expired when this

arch/arm/src/lpc43xx/lpc43_rit.c

@@ -68,7 +68,6 @@
 static double sec_per_tick;
 static uint64_t g_internal_timer;
 static uint64_t g_alarm;
-struct timespec g_ts;
 
 /****************************************************************************
  * Private Functions
@@ -87,9 +86,7 @@ static int lpc43_rit_isr(int irq, void *context, void *arg)
     {
       /* handle expired alarm */
 
-      g_ts.tv_sec = (uint32_t)(g_internal_timer / 1000000000);
-      g_ts.tv_nsec = (uint32_t)(g_internal_timer % 1000000000);
-      nxsched_alarm_expiration(&g_ts);
+      nxsched_timer_expiration();
     }
 
   leave_critical_section(flags);

arch/arm/src/lpc43xx/lpc43_tickless_rit.c

@@ -496,13 +496,7 @@ static inline void lpc43_tl_alarm(uint32_t curr)
   lpc43_tl_init_timer_vars();
   lpc43_tl_set_default_compare(curr);
 
-#ifdef CONFIG_SCHED_TICKLESS_ALARM
-  struct timespec ts;
-  up_timer_gettime(&ts);
-  nxsched_alarm_expiration(&ts);
-#else
   nxsched_timer_expiration();
-#endif
 }
 
 /* Interrupt handler */

arch/arm/src/lpc54xx/lpc54_tickless.c

@@ -539,13 +539,7 @@ static inline void lpc54_tl_alarm(uint64_t curr)
   lpc54_init_timer_vars();
   lpc54_set_default_compare(curr);
 
-#ifdef CONFIG_SCHED_TICKLESS_ALARM
-  struct timespec ts;
-  up_timer_gettime(&ts);
-  nxsched_alarm_expiration(&ts);
-#else
   nxsched_timer_expiration();
-#endif
 }
 
 /* Interrupt handler */

arch/arm/src/nrf52/nrf52_tickless_rtc.c

@@ -187,6 +187,25 @@ static void rtc_prepare_alarm(void)
     }
 }
 
+/****************************************************************************
+ * Name: rtc_cancel_ack
+ ****************************************************************************/
+
+static void rtc_cancel_ack(void)
+{
+  irqstate_t flags;
+
+  flags = enter_critical_section();
+
+  NRF52_RTC_DISABLEINT(g_tickless_dev.rtc, NRF52_RTC_EVT_COMPARE0);
+  NRF52_RTC_ACKINT(g_tickless_dev.rtc, NRF52_RTC_EVT_COMPARE0);
+  g_tickless_dev.alarm_set = false;
+
+  leave_critical_section(flags);
+
+  return OK;
+}
+
 /****************************************************************************
  * Name: rtc_handler
  ****************************************************************************/
@@ -221,15 +240,13 @@ static int rtc_handler(int irq, void *context, void *arg)
 
   if (NRF52_RTC_CHECKINT(g_tickless_dev.rtc, NRF52_RTC_EVT_COMPARE0))
     {
-      struct timespec now;
+      /* cancel the alarm and ack the event */
 
-      /* cancel alarm and get current time */
-
-      up_alarm_cancel(&now);
+      rtc_cancel_ack();
 
       /* let scheduler now of alarm firing */
 
-      nxsched_alarm_expiration(&now);
+      nxsched_timer_expiration();
     }
 
   leave_critical_section(flags);
@@ -254,13 +271,14 @@ int up_alarm_cancel(struct timespec *ts)
 
   NRF52_RTC_DISABLEINT(g_tickless_dev.rtc, NRF52_RTC_EVT_COMPARE0);
   NRF52_RTC_GETCOUNTER(g_tickless_dev.rtc, &counter);
-  rtc_counter_to_ts(counter, ts);
 
   NRF52_RTC_ACKINT(g_tickless_dev.rtc, NRF52_RTC_EVT_COMPARE0);
   g_tickless_dev.alarm_set = false;
 
   leave_critical_section(flags);
 
+  rtc_counter_to_ts(counter, ts);
+
   return OK;
 }
 
@@ -310,8 +328,6 @@ int up_timer_gettime(struct timespec *ts)
 
 void up_timer_initialize(void)
 {
-  struct timespec ts;
-
   memset(&g_tickless_dev, 0, sizeof(struct nrf52_tickless_dev_s));
 
   g_tickless_dev.rtc = nrf52_rtc_init(CONFIG_NRF52_SYSTIMER_RTC_INSTANCE);
@@ -341,6 +357,5 @@ void up_timer_initialize(void)
 
   /* kick off alarm scheduling */
 
-  ts.tv_sec = ts.tv_nsec = 0;
-  nxsched_alarm_expiration(&ts);
+  nxsched_timer_expiration();
 }

arch/arm/src/nrf53/nrf53_tickless_rtc.c

@@ -185,6 +185,25 @@ static void rtc_prepare_alarm(void)
     }
 }
 
+/****************************************************************************
+ * Name: rtc_cancel_ack
+ ****************************************************************************/
+
+static void rtc_cancel_ack(void)
+{
+  irqstate_t flags;
+
+  flags = enter_critical_section();
+
+  NRF53_RTC_DISABLEINT(g_tickless_dev.rtc, NRF53_RTC_EVT_COMPARE0);
+  NRF53_RTC_ACKINT(g_tickless_dev.rtc, NRF53_RTC_EVT_COMPARE0);
+  g_tickless_dev.alarm_set = false;
+
+  leave_critical_section(flags);
+
+  return OK;
+}
+
 /****************************************************************************
  * Name: rtc_handler
  ****************************************************************************/
@@ -219,15 +238,13 @@ static int rtc_handler(int irq, void *context, void *arg)
 
   if (NRF53_RTC_CHECKINT(g_tickless_dev.rtc, NRF53_RTC_EVT_COMPARE0))
     {
-      struct timespec now;
+      /* cancel the alarm and ack the event */
 
-      /* cancel alarm and get current time */
-
-      up_alarm_cancel(&now);
+      rtc_cancel_ack();
 
       /* let scheduler now of alarm firing */
 
-      nxsched_alarm_expiration(&now);
+      nxsched_timer_expiration();
     }
 
   leave_critical_section(flags);
@@ -252,13 +269,14 @@ int up_alarm_cancel(struct timespec *ts)
 
   NRF53_RTC_DISABLEINT(g_tickless_dev.rtc, NRF53_RTC_EVT_COMPARE0);
   NRF53_RTC_GETCOUNTER(g_tickless_dev.rtc, &counter);
-  rtc_counter_to_ts(counter, ts);
 
   NRF53_RTC_ACKINT(g_tickless_dev.rtc, NRF53_RTC_EVT_COMPARE0);
   g_tickless_dev.alarm_set = false;
 
   leave_critical_section(flags);
 
+  rtc_counter_to_ts(counter, ts);
+
   return OK;
 }
 
@@ -308,8 +326,6 @@ int up_timer_gettime(struct timespec *ts)
 
 void up_timer_initialize(void)
 {
-  struct timespec ts;
-
   memset(&g_tickless_dev, 0, sizeof(struct nrf53_tickless_dev_s));
 
   g_tickless_dev.rtc = nrf53_rtc_init(CONFIG_NRF53_SYSTIMER_RTC_INSTANCE);
@@ -339,6 +355,5 @@ void up_timer_initialize(void)
 
   /* kick off alarm scheduling */
 
-  ts.tv_sec = ts.tv_nsec = 0;
-  nxsched_alarm_expiration(&ts);
+  nxsched_timer_expiration();
 }

arch/arm/src/nrf91/nrf91_tickless_rtc.c

@@ -185,6 +185,21 @@ static void rtc_prepare_alarm(void)
     }
 }
 
+static void rtc_cancel_ack(void)
+{
+  irqstate_t flags;
+
+  flags = enter_critical_section();
+
+  NRF91_RTC_DISABLEINT(g_tickless_dev.rtc, NRF91_RTC_EVT_COMPARE0);
+  NRF91_RTC_ACKINT(g_tickless_dev.rtc, NRF91_RTC_EVT_COMPARE0);
+  g_tickless_dev.alarm_set = false;
+
+  leave_critical_section(flags);
+
+  return OK;
+}
+
 /****************************************************************************
  * Name: rtc_handler
  ****************************************************************************/
@@ -219,15 +234,13 @@ static int rtc_handler(int irq, void *context, void *arg)
 
   if (NRF91_RTC_CHECKINT(g_tickless_dev.rtc, NRF91_RTC_EVT_COMPARE0))
     {
-      struct timespec now;
+      /* cancel the alarm and ack the event */
 
-      /* cancel alarm and get current time */
-
-      up_alarm_cancel(&now);
+      rtc_cancel_ack();
 
       /* let scheduler now of alarm firing */
 
-      nxsched_alarm_expiration(&now);
+      nxsched_timer_expiration();
     }
 
   leave_critical_section(flags);
@@ -252,13 +265,14 @@ int up_alarm_cancel(struct timespec *ts)
 
   NRF91_RTC_DISABLEINT(g_tickless_dev.rtc, NRF91_RTC_EVT_COMPARE0);
   NRF91_RTC_GETCOUNTER(g_tickless_dev.rtc, &counter);
-  rtc_counter_to_ts(counter, ts);
 
   NRF91_RTC_ACKINT(g_tickless_dev.rtc, NRF91_RTC_EVT_COMPARE0);
   g_tickless_dev.alarm_set = false;
 
   leave_critical_section(flags);
 
+  rtc_counter_to_ts(counter, ts);
+
   return OK;
 }
 
@@ -308,8 +322,6 @@ int up_timer_gettime(struct timespec *ts)
 
 void up_timer_initialize(void)
 {
-  struct timespec ts;
-
   memset(&g_tickless_dev, 0, sizeof(struct nrf91_tickless_dev_s));
 
   g_tickless_dev.rtc = nrf91_rtc_init(CONFIG_NRF91_SYSTIMER_RTC_INSTANCE);
@@ -339,6 +351,5 @@ void up_timer_initialize(void)
 
   /* kick off alarm scheduling */
 
-  ts.tv_sec = ts.tv_nsec = 0;
-  nxsched_alarm_expiration(&ts);
+  nxsched_timer_expiration();
 }

arch/arm/src/stm32f7/stm32_tickless.c

@@ -313,9 +313,6 @@ static int stm32_tickless_setchannel(uint8_t channel)
 
 static void stm32_interval_handler(void)
 {
-#ifdef CONFIG_SCHED_TICKLESS_ALARM
-  struct timespec tv;
-#endif
   tmrinfo("Expired...\n");
 
   /* Disable the compare interrupt now. */
@@ -325,12 +322,7 @@ static void stm32_interval_handler(void)
 
   g_tickless.pending = false;
 
-#ifndef CONFIG_SCHED_TICKLESS_ALARM
   nxsched_timer_expiration();
-#else
-  up_timer_gettime(&tv);
-  nxsched_alarm_expiration(&tv);
-#endif
 }
 
 /****************************************************************************

arch/arm/src/stm32h7/stm32_tickless.c

@@ -300,9 +300,6 @@ static int stm32_tickless_setchannel(uint8_t channel)
 
 static void stm32_interval_handler(void)
 {
-#ifdef CONFIG_SCHED_TICKLESS_ALARM
-  struct timespec tv;
-#endif
   tmrinfo("Expired...\n");
 
   /* Disable the compare interrupt now. */
@@ -312,12 +309,7 @@ static void stm32_interval_handler(void)
 
   g_tickless.pending = false;
 
-#ifndef CONFIG_SCHED_TICKLESS_ALARM
   nxsched_timer_expiration();
-#else
-  up_timer_gettime(&tv);
-  nxsched_alarm_expiration(&tv);
-#endif
 }
 
 /****************************************************************************

arch/arm/src/xmc4/xmc4_tickless.c

@@ -385,7 +385,7 @@ int up_timer_gettime(struct timespec *ts)
  * Name: up_alarm_start
  *
  * Description:
- *   Start the alarm.  nxsched_alarm_expiration() will be called when the
+ *   Start the alarm.  nxsched_timer_expiration() will be called when the
  *   alarm occurs (unless up_alaram_cancel is called to stop it).
  *
  *   Provided by platform-specific code and called from the RTOS base code.
@@ -393,7 +393,7 @@ int up_timer_gettime(struct timespec *ts)
  * Input Parameters:
  *   ts - The time in the future at the alarm is expected to occur.  When
  *        the alarm occurs the timer logic will call
- *        nxsched_alarm_expiration().
+ *        nxsched_timer_expiration().
  *
  * Returned Value:
  *   Zero (OK) is returned on success; a negated errno value is returned on
@@ -466,7 +466,7 @@ int up_timer_start(const struct timespec *ts)
  * Description:
  *   Cancel the alarm and return the time of cancellation of the alarm.
  *   These two steps need to be as nearly atomic as possible.
- *   nxsched_alarm_expiration() will not be called unless the alarm is
+ *   nxsched_timer_expiration() will not be called unless the alarm is
  *   restarted with up_alarm_start().
  *
  *   If, as a race condition, the alarm has already expired when this

arch/avr/src/avrdx/avrdx_timerisr_tickless_alarm.c

@@ -277,8 +277,7 @@ static void avrdx_check_alarm_expired(uint8_t context)
        */
 
       avrdx_deactivate_alarm();
-      up_timer_gettime(&tv);
-      nxsched_alarm_expiration(&tv);
+      nxsched_timer_expiration();
     }
   else
     {

drivers/timers/arch_alarm.c

@@ -301,7 +301,7 @@ int weak_function up_timer_gettime(struct timespec *ts)
  * Description:
  *   Cancel the alarm and return the time of cancellation of the alarm.
  *   These two steps need to be as nearly atomic as possible.
- *   nxsched_alarm_expiration() will not be called unless the alarm is
+ *   nxsched_timer_expiration() will not be called unless the alarm is
  *   restarted with up_alarm_start().
  *
  *   If, as a race condition, the alarm has already expired when this
@@ -348,14 +348,14 @@ int weak_function up_alarm_tick_cancel(FAR clock_t *ticks)
  * Name: up_alarm_start
  *
  * Description:
- *   Start the alarm.  nxsched_alarm_expiration() will be called when the
+ *   Start the alarm.  nxsched_timer_expiration() will be called when the
  *   alarm occurs (unless up_alaram_cancel is called to stop it).
  *
  *   Provided by platform-specific code and called from the RTOS base code.
  *
  * Input Parameters:
  *   ts - The time in the future at the alarm is expected to occur. When the
- *        alarm occurs the timer logic will call nxsched_alarm_expiration().
+ *        alarm occurs the timer logic will call nxsched_timer_expiration().
  *
  * Returned Value:
  *   Zero (OK) is returned on success; a negated errno value is returned on

include/nuttx/arch.h

@@ -1885,13 +1885,8 @@ void up_timer_initialize(void);
  * The RTOS will provide the following interfaces for use by the platform-
  * specific interval timer implementation:
  *
- * #ifdef CONFIG_SCHED_TICKLESS_ALARM
- *   void nxsched_alarm_expiration(FAR const struct timespec *ts):  Called
- *     by the platform-specific logic when the alarm expires.
- * #else
  *   void nxsched_timer_expiration(void):  Called by the platform-specific
  *     logic when the interval timer expires.
- * #endif
  *
  ****************************************************************************/
 
@@ -1938,7 +1933,7 @@ void up_timer_getmask(FAR clock_t *mask);
  * Description:
  *   Cancel the alarm and return the time of cancellation of the alarm.
  *   These two steps need to be as nearly atomic as possible.
- *   nxsched_alarm_expiration() will not be called unless the alarm is
+ *   nxsched_timer_expiration() will not be called unless the alarm is
  *   restarted with up_alarm_start().
  *
  *   If, as a race condition, the alarm has already expired when this
@@ -1978,7 +1973,7 @@ int up_alarm_tick_cancel(FAR clock_t *ticks);
  * Name: up_alarm_start
  *
  * Description:
- *   Start the alarm.  nxsched_alarm_expiration() will be called when the
+ *   Start the alarm.  nxsched_timer_expiration() will be called when the
  *   alarm occurs (unless up_alaram_cancel is called to stop it).
  *
  *   Provided by platform-specific code and called from the RTOS base code.
@@ -1986,7 +1981,7 @@ int up_alarm_tick_cancel(FAR clock_t *ticks);
  * Input Parameters:
  *   ts - The time in the future at the alarm is expected to occur.  When
  *        the alarm occurs the timer logic will call
- *        nxsched_alarm_expiration().
+ *        nxsched_timer_expiration().
  *
  * Returned Value:
  *   Zero (OK) is returned on success; a negated errno value is returned on
@@ -2466,30 +2461,6 @@ void nxsched_process_timer(void);
 void nxsched_timer_expiration(void);
 #endif
 
-/****************************************************************************
- * Name:  nxsched_alarm_expiration
- *
- * Description:
- *   if CONFIG_SCHED_TICKLESS is defined, then this function is provided by
- *   the RTOS base code and called from platform-specific code when the
- *   alarm used to implement the tick-less OS expires.
- *
- * Input Parameters:
- *   ts - The time that the alarm expired
- *
- * Returned Value:
- *   None
- *
- * Assumptions/Limitations:
- *   Base code implementation assumes that this function is called from
- *   interrupt handling logic with interrupts disabled.
- *
- ****************************************************************************/
-
-#if defined(CONFIG_SCHED_TICKLESS) && defined(CONFIG_SCHED_TICKLESS_ALARM)
-void nxsched_alarm_expiration(FAR const struct timespec *ts);
-#endif
-
 /****************************************************************************
  * Name:  nxsched_get_next_expired
  *

sched/sched/sched_timerexpiration.c

@@ -451,38 +451,6 @@ clock_t nxsched_timer_update(clock_t ticks, bool noswitches)
  * Public Functions
  ****************************************************************************/
 
-/****************************************************************************
- * Name:  nxsched_alarm_expiration
- *
- * Description:
- *   if CONFIG_SCHED_TICKLESS is defined, then this function is provided by
- *   the RTOS base code and called from platform-specific code when the
- *   alarm used to implement the tick-less OS expires.
- *
- * Input Parameters:
- *   ts - The time that the alarm expired
- *
- * Returned Value:
- *   None
- *
- * Assumptions/Limitations:
- *   Base code implementation assumes that this function is called from
- *   interrupt handling logic with interrupts disabled.
- *
- ****************************************************************************/
-
-#ifdef CONFIG_SCHED_TICKLESS_ALARM
-void nxsched_alarm_expiration(FAR const struct timespec *ts)
-{
-  clock_t ticks;
-
-  DEBUGASSERT(ts);
-
-  ticks = clock_time2ticks_floor(ts);
-  nxsched_timer_update(ticks, false);
-}
-#endif
-
 /****************************************************************************
  * Name: nxsched_timer_expiration
  *