[rtems commit] score: Add _Watchdog_Nanoseconds_per_tick

[Sebastian Huber]

Module:    rtems
Branch:    master
Commit:    cea5ff700166a24b5da300cf0aa6884164600ed3
Changeset: http://git.rtems.org/rtems/commit/?id=cea5ff700166a24b5da300cf0aa6884164600ed3

Author:    Sebastian Huber <sebastian.huber at embedded-brains.de>
Date:      Fri Oct 20 15:35:14 2017 +0200

score: Add _Watchdog_Nanoseconds_per_tick

Move it from the configuration to a separate variable.

Update #3117.
Update #3182.

---

 cpukit/sapi/include/confdefs.h              |  4 +++-
 cpukit/sapi/include/rtems/config.h          | 12 +++---------
 cpukit/score/include/rtems/score/watchdog.h |  8 ++++++++
 testsuites/sptests/spwatchdog/init.c        |  1 +
 4 files changed, 15 insertions(+), 10 deletions(-)

diff --git a/cpukit/sapi/include/confdefs.h b/cpukit/sapi/include/confdefs.h
index aed740b..219260e 100755
--- a/cpukit/sapi/include/confdefs.h
+++ b/cpukit/sapi/include/confdefs.h
@@ -3108,6 +3108,9 @@ extern rtems_initialization_tasks_table Initialization_tasks[];
   const size_t _Thread_Control_add_on_count =
     RTEMS_ARRAY_SIZE( _Thread_Control_add_ons );
 
+  const uint32_t _Watchdog_Nanoseconds_per_tick =
+    1000 * CONFIGURE_MICROSECONDS_PER_TICK;
+
   const uint32_t _Watchdog_Ticks_per_second = _CONFIGURE_TICKS_PER_SECOND;
 
   const uint64_t _Watchdog_Monotonic_max_seconds =
@@ -3167,7 +3170,6 @@ extern rtems_initialization_tasks_table Initialization_tasks[];
     _CONFIGURE_POSIX_KEYS,                     /* POSIX keys are always */
     CONFIGURE_MAXIMUM_POSIX_KEY_VALUE_PAIRS,  /*   enabled */
     CONFIGURE_MICROSECONDS_PER_TICK,          /* microseconds per clock tick */
-    1000 * CONFIGURE_MICROSECONDS_PER_TICK,   /* nanoseconds per clock tick */
     CONFIGURE_TICKS_PER_TIMESLICE,            /* ticks per timeslice quantum */
     CONFIGURE_IDLE_TASK_BODY,                 /* user's IDLE task */
     CONFIGURE_IDLE_TASK_STACK_SIZE,           /* IDLE task stack size */
diff --git a/cpukit/sapi/include/rtems/config.h b/cpukit/sapi/include/rtems/config.h
index 2993e70..6b97376 100644
--- a/cpukit/sapi/include/rtems/config.h
+++ b/cpukit/sapi/include/rtems/config.h
@@ -43,6 +43,8 @@ extern "C" {
 #define rtems_resource_maximum_per_allocation(resource) \
   _Objects_Maximum_per_allocation(resource)
 
+#include <rtems/score/watchdog.h>
+
 /*
  *  This is kind of kludgy but it allows targets to totally ignore the
  *  optional APIs like POSIX safely.
@@ -165,14 +167,6 @@ typedef struct {
   uint32_t                       microseconds_per_tick;
 
   /** 
-   * This field specifies the number of nanoseconds which elapse
-   * between clock ticks.  This value is derived from the
-   * microseconds_per_tick field and provided to avoid calculation at
-   * run-time.
-   */
-  uint32_t                       nanoseconds_per_tick;
-
-  /** 
    * This field specifies the number of ticks in each task's timeslice.
    */
   uint32_t                       ticks_per_timeslice;
@@ -308,7 +302,7 @@ extern const rtems_configuration_table Configuration;
 #define rtems_configuration_get_milliseconds_per_tick() \
         (Configuration.microseconds_per_tick / 1000)
 #define rtems_configuration_get_nanoseconds_per_tick() \
-        (Configuration.nanoseconds_per_tick)
+        (_Watchdog_Nanoseconds_per_tick)
 
 #define rtems_configuration_get_ticks_per_timeslice() \
         (Configuration.ticks_per_timeslice)
diff --git a/cpukit/score/include/rtems/score/watchdog.h b/cpukit/score/include/rtems/score/watchdog.h
index 8c37103..a379bf7 100644
--- a/cpukit/score/include/rtems/score/watchdog.h
+++ b/cpukit/score/include/rtems/score/watchdog.h
@@ -159,6 +159,14 @@ struct Watchdog_Control {
 extern volatile Watchdog_Interval _Watchdog_Ticks_since_boot;
 
 /**
+ * @brief The watchdog nanoseconds per tick.
+ *
+ * This constant is defined by the application configuration via
+ * <rtems/confdefs.h>.
+ */
+extern const uint32_t _Watchdog_Nanoseconds_per_tick;
+
+/**
  * @brief The watchdog ticks per second.
  *
  * This constant is defined by the application configuration via
diff --git a/testsuites/sptests/spwatchdog/init.c b/testsuites/sptests/spwatchdog/init.c
index 274def9..d212fbb 100644
--- a/testsuites/sptests/spwatchdog/init.c
+++ b/testsuites/sptests/spwatchdog/init.c
@@ -59,6 +59,7 @@ static void test_watchdog_static_init( void )
 
 static void test_watchdog_config( void )
 {
+  rtems_test_assert( _Watchdog_Nanoseconds_per_tick == 10000000 );
   rtems_test_assert( _Watchdog_Ticks_per_second == 100 );
   rtems_test_assert( _Watchdog_Monotonic_max_seconds == 184467440737095516 );
 }