rtems: Avoid <rtems/score/timecounter.h> in API

Use a real function for rtems_clock_get_uptime_seconds().

Update #3598.

cpukit/Makefile.am

@@ -675,6 +675,7 @@ librtemscpu_a_SOURCES += rtems/src/clockgettod.c
 librtemscpu_a_SOURCES += rtems/src/clockgettodtimeval.c
 librtemscpu_a_SOURCES += rtems/src/clockgetuptime.c
 librtemscpu_a_SOURCES += rtems/src/clockgetuptimenanoseconds.c
+librtemscpu_a_SOURCES += rtems/src/clockgetuptimeseconds.c
 librtemscpu_a_SOURCES += rtems/src/clockgetuptimetimeval.c
 librtemscpu_a_SOURCES += rtems/src/clockset.c
 librtemscpu_a_SOURCES += rtems/src/clocktick.c

cpukit/include/rtems/imfs.h

@@ -21,6 +21,7 @@
 
 #include <rtems/libio_.h>
 #include <rtems/pipe.h>
+#include <rtems/score/timecounter.h>
 
 /**
  * @brief In-Memory File System Support.

cpukit/include/rtems/rtems/clock.h

@@ -33,9 +33,6 @@
 #include <rtems/rtems/status.h>
 #include <rtems/rtems/types.h>
 #include <rtems/config.h>
-#include <rtems/score/timecounterimpl.h>
-
-#include <sys/time.h> /* struct timeval */
 
 /**
  *  @defgroup ClassicClock Clocks
@@ -265,10 +262,7 @@ void rtems_clock_get_uptime_timeval( struct timeval *uptime );
  *
  * @retval The system uptime in seconds.
  */
-RTEMS_INLINE_ROUTINE time_t rtems_clock_get_uptime_seconds( void )
-{
-  return _Timecounter_Time_uptime - 1;
-}
+time_t rtems_clock_get_uptime_seconds( void );
 
 /**
  * @brief Returns the system uptime in nanoseconds.

cpukit/include/rtems/rtems/types.h

@@ -23,6 +23,7 @@
  */
 
 #include <sys/_timespec.h>
+#include <sys/_timeval.h>
 #include <stdint.h>
 #include <rtems/score/heap.h>
 #include <rtems/score/object.h>

cpukit/rtems/src/clockgetuptimeseconds.c

@@ -0,0 +1,31 @@
+/**
+ * @file
+ *
+ * @ingroup ClassicClock
+ */
+
+/*
+ * Copyright (c) 2018 embedded brains GmbH.  All rights reserved.
+ *
+ *  embedded brains GmbH
+ *  Dornierstr. 4
+ *  82178 Puchheim
+ *  Germany
+ *  <rtems@embedded-brains.de>
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rtems.com/license/LICENSE.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <rtems/rtems/clock.h>
+#include <rtems/score/timecounter.h>
+
+time_t rtems_clock_get_uptime_seconds( void )
+{
+  return _Timecounter_Time_uptime - 1;
+}