score: Create watchdog implementation header

Move implementation specific parts of watchdog.h and watchdog.inl into
new header file watchdogimpl.h.  The watchdog.h contains now only the
application visible API.

1 files changed, 476 insertions, 0 deletions

diff --git a/cpukit/score/include/rtems/score/watchdogimpl.h b/cpukit/score/include/rtems/score/watchdogimpl.h
new file mode 100644
index 0000000000..e0324ff257
--- /dev/null
+++ b/cpukit/score/include/rtems/score/watchdogimpl.h
@@ -0,0 +1,476 @@
+/**
+ * @file
+ *
+ * @brief Inlined Routines in the Watchdog Handler
+ *
+ * This file contains the static inline implementation of all inlined
+ * routines in the Watchdog Handler.
+ */
+
+/*
+ *  COPYRIGHT (c) 1989-2004.
+ *  On-Line Applications Research Corporation (OAR).
+ *
+ *  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.
+ */
+
+#ifndef _RTEMS_SCORE_WATCHDOGIMPL_H
+#define _RTEMS_SCORE_WATCHDOGIMPL_H
+
+#include <rtems/score/watchdog.h>
+#include <rtems/score/chainimpl.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ *  @addtogroup ScoreWatchdog
+ *  @{
+ */
+
+/**
+ *  @brief Control block used to manage intervals.
+ *
+ *  The following type defines the control block used to manage
+ *  intervals.
+ */
+#define WATCHDOG_MAXIMUM_INTERVAL ((Watchdog_Interval) 0xffffffff)
+
+/**
+ *  @brief the manner in which a watchdog chain may
+ *  be adjusted by the @ref _Watchdog_Adjust routine.
+ *
+ *  The following enumerated type details the manner in which
+ *  a watchdog chain may be adjusted by the @ref _Watchdog_Adjust
+ *  routine.  The direction indicates a movement FORWARD
+ *  or BACKWARD in time.
+ */
+typedef enum {
+  /** adjust delta value forward */
+  WATCHDOG_FORWARD,
+  /** adjust delta value backward */
+  WATCHDOG_BACKWARD
+} Watchdog_Adjust_directions;
+
+/**
+ *  @brief Watchdog synchronization level.
+ *
+ *  This used for synchronization purposes
+ *  during an insert on a watchdog delta chain.
+ */
+SCORE_EXTERN volatile uint32_t    _Watchdog_Sync_level;
+
+/**
+ *  @brief Watchdog synchronization count.
+ *
+ *  This used for synchronization purposes
+ *  during an insert on a watchdog delta chain.
+ */
+SCORE_EXTERN volatile uint32_t    _Watchdog_Sync_count;
+
+/**
+ *  @brief The number of ticks since the system was booted.
+ *
+ *  This contains the number of ticks since the system was booted.
+ */
+
+SCORE_EXTERN volatile Watchdog_Interval _Watchdog_Ticks_since_boot;
+
+/**
+ *  @brief The number of nanoseconds since the last clock tick.
+ *
+ *  This is a pointer to the optional BSP plugin to obtain the number
+ *  of nanoseconds since the last clock tick.
+ */
+extern Watchdog_Nanoseconds_since_last_tick_routine
+  _Watchdog_Nanoseconds_since_tick_handler;
+
+/**
+ *  @brief Watchdog chain which is managed at ticks.
+ *
+ *  This is the watchdog chain which is managed at ticks.
+ */
+SCORE_EXTERN Chain_Control _Watchdog_Ticks_chain;
+
+/**
+ *  @brief Watchdog chain which is managed at second boundaries.
+ *
+ *  This is the watchdog chain which is managed at second boundaries.
+ */
+SCORE_EXTERN Chain_Control _Watchdog_Seconds_chain;
+
+/**
+ *  @brief Initialize the watchdog handler.
+ *
+ *  This routine initializes the watchdog handler.  The watchdog
+ *  synchronization flag is initialized and the watchdog chains are
+ *  initialized and emptied.
+ */
+void _Watchdog_Handler_initialization( void );
+
+/**
+ *  @brief Removes @a the_watchdog from the watchdog chain.
+ *
+ *  This routine removes @a the_watchdog from the watchdog chain on which
+ *  it resides and returns the state @a the_watchdog timer was in.
+ *
+ *  @param[in] the_watchdog will be removed
+ *  @retval the state in which @a the_watchdog was in when removed
+ */
+Watchdog_States _Watchdog_Remove (
+  Watchdog_Control *the_watchdog
+);
+
+/**
+ *  @brief Adjusts the @a header watchdog chain in the forward
+ *  or backward @a direction for @a units ticks.
+ *
+ *  This routine adjusts the @a header watchdog chain in the forward
+ *  or backward @a direction for @a units ticks.
+ *
+ *  @param[in] header is the watchdog chain to adjust
+ *  @param[in] direction is the direction to adjust @a header
+ *  @param[in] units is the number of units to adjust @a header
+ */
+void _Watchdog_Adjust (
+  Chain_Control              *header,
+  Watchdog_Adjust_directions  direction,
+  Watchdog_Interval           units
+);
+
+/**
+ *  @brief Adjusts the @a header watchdog chain in the forward
+ *  @a direction for @a units_arg ticks.
+ *
+ *  This routine adjusts the @a header watchdog chain in the forward
+ *  @a direction for @a units_arg ticks.
+ *
+ *  @param[in] header is the watchdog chain to adjust
+ *  @param[in] units_arg is the number of units to adjust @a header
+ *  @param[in] to_fire is a pointer to an initialized Chain_Control to which
+ *             all watchdog instances that are to be fired will be placed.
+ *
+ *  @note This always adjusts forward.
+ */
+void _Watchdog_Adjust_to_chain(
+  Chain_Control               *header,
+  Watchdog_Interval            units_arg,
+  Chain_Control               *to_fire
+
+);
+
+/**
+ *  @brief Inserts @a the_watchdog into the @a header watchdog chain
+ *  for a time of @a units.
+ *
+ *  This routine inserts @a the_watchdog into the @a header watchdog chain
+ *  for a time of @a units.
+ *  Update the delta interval counters.
+ *
+ *  @param[in] header is @a the_watchdog list to insert @a the_watchdog on
+ *  @param[in] the_watchdog is the watchdog to insert
+ */
+void _Watchdog_Insert (
+  Chain_Control         *header,
+  Watchdog_Control      *the_watchdog
+);
+
+/**
+ *  @brief This routine is invoked at appropriate intervals to update
+ *  the @a header watchdog chain.
+ *
+ *  This routine is invoked at appropriate intervals to update
+ *  the @a header watchdog chain.
+ *  This routine decrements the delta counter in response to a tick.
+ *
+ *  @param[in] header is the watchdog chain to tickle
+ */
+void _Watchdog_Tickle (
+  Chain_Control *header
+);
+
+/**
+ *  @brief Report information on a single watchdog instance.
+ *
+ *  This method prints a one line report on the watchdog instance
+ *  provided.  The @a name may be used to identify the watchdog and
+ *  a space will be printed after @a name if it is not NULL.
+ *
+ *  @param[in] name is a string to prefix the line with.  If NULL,
+ *             nothing is printed.
+ *  @param[in] watch is the watchdog instance to be printed.
+ *
+ *  @note This is a debug routine.  It uses printk() and prudence should
+ *        exercised when using it.
+ */
+void _Watchdog_Report(
+  const char        *name,
+  Watchdog_Control  *watch
+);
+
+/**
+ *  @brief Report information on a watchdog chain.
+ *
+ *  This method prints report on the watchdog chain provided.
+ *  The @a name may be used to identify the watchdog chain and
+ *  a space will be printed after @a name if it is not NULL.
+ *
+ *  @param[in] name is a string to prefix the line with.  If NULL,
+ *             nothing is printed.
+ *  @param[in] header is the watchdog chain to be printed.
+ *
+ *  @note This is a debug routine.  It uses printk() and prudence should
+ *        exercised when using it.  It also disables interrupts so the
+ *        chain can be traversed in a single atomic pass.
+ */
+void _Watchdog_Report_chain(
+  const char        *name,
+  Chain_Control     *header
+);
+
+/**
+ * @brief Handler for default nanoseconds since last tick.
+ *
+ * @retval 0 Always.
+ */
+uint32_t _Watchdog_Nanoseconds_since_tick_default_handler( void );
+
+/**
+ * This routine initializes the specified watchdog.  The watchdog is
+ * made inactive, the watchdog id and handler routine are set to the
+ * specified values.
+ */
+
+RTEMS_INLINE_ROUTINE void _Watchdog_Initialize(
+  Watchdog_Control               *the_watchdog,
+  Watchdog_Service_routine_entry  routine,
+  Objects_Id                      id,
+  void                           *user_data
+)
+{
+  the_watchdog->state     = WATCHDOG_INACTIVE;
+  the_watchdog->routine   = routine;
+  the_watchdog->id        = id;
+  the_watchdog->user_data = user_data;
+}
+
+/**
+ * This routine returns true if the watchdog timer is in the ACTIVE
+ * state, and false otherwise.
+ */
+
+RTEMS_INLINE_ROUTINE bool _Watchdog_Is_active(
+  Watchdog_Control *the_watchdog
+)
+{
+
+  return ( the_watchdog->state == WATCHDOG_ACTIVE );
+
+}
+
+/**
+ * This routine activates THE_WATCHDOG timer which is already
+ * on a watchdog chain.
+ */
+
+RTEMS_INLINE_ROUTINE void _Watchdog_Activate(
+  Watchdog_Control *the_watchdog
+)
+{
+
+  the_watchdog->state = WATCHDOG_ACTIVE;
+
+}
+
+/**
+ * This routine deactivates THE_WATCHDOG timer which will remain
+ * on a watchdog chain.
+ */
+
+RTEMS_INLINE_ROUTINE void _Watchdog_Deactivate(
+  Watchdog_Control *the_watchdog
+)
+{
+
+  the_watchdog->state = WATCHDOG_REMOVE_IT;
+
+}
+
+/**
+ * This routine is invoked at each clock tick to update the ticks
+ * watchdog chain.
+ */
+
+RTEMS_INLINE_ROUTINE void _Watchdog_Tickle_ticks( void )
+{
+
+  _Watchdog_Tickle( &_Watchdog_Ticks_chain );
+
+}
+
+/**
+ * This routine is invoked at each clock tick to update the seconds
+ * watchdog chain.
+ */
+
+RTEMS_INLINE_ROUTINE void _Watchdog_Tickle_seconds( void )
+{
+
+  _Watchdog_Tickle( &_Watchdog_Seconds_chain );
+
+}
+
+/**
+ * This routine inserts THE_WATCHDOG into the ticks watchdog chain
+ * for a time of UNITS ticks.  The INSERT_MODE indicates whether
+ * THE_WATCHDOG is to be activated automatically or later, explicitly
+ * by the caller.
+ */
+
+RTEMS_INLINE_ROUTINE void _Watchdog_Insert_ticks(
+  Watchdog_Control      *the_watchdog,
+  Watchdog_Interval      units
+)
+{
+
+  the_watchdog->initial = units;
+
+  _Watchdog_Insert( &_Watchdog_Ticks_chain, the_watchdog );
+
+}
+
+/**
+ * This routine inserts THE_WATCHDOG into the seconds watchdog chain
+ * for a time of UNITS seconds.  The INSERT_MODE indicates whether
+ * THE_WATCHDOG is to be activated automatically or later, explicitly
+ * by the caller.
+ */
+
+RTEMS_INLINE_ROUTINE void _Watchdog_Insert_seconds(
+  Watchdog_Control      *the_watchdog,
+  Watchdog_Interval      units
+)
+{
+
+  the_watchdog->initial = units;
+
+  _Watchdog_Insert( &_Watchdog_Seconds_chain, the_watchdog );
+
+}
+
+/**
+ * This routine adjusts the seconds watchdog chain in the forward
+ * or backward DIRECTION for UNITS seconds.  This is invoked when the
+ * current time of day is changed.
+ */
+
+RTEMS_INLINE_ROUTINE void _Watchdog_Adjust_seconds(
+  Watchdog_Adjust_directions direction,
+  Watchdog_Interval          units
+)
+{
+
+  _Watchdog_Adjust( &_Watchdog_Seconds_chain, direction, units );
+
+}
+
+/**
+ * This routine adjusts the ticks watchdog chain in the forward
+ * or backward DIRECTION for UNITS ticks.
+ */
+
+RTEMS_INLINE_ROUTINE void _Watchdog_Adjust_ticks(
+  Watchdog_Adjust_directions direction,
+  Watchdog_Interval          units
+)
+{
+
+  _Watchdog_Adjust( &_Watchdog_Ticks_chain, direction, units );
+
+}
+
+/**
+ * This routine resets THE_WATCHDOG timer to its state at INSERT
+ * time.  This routine is valid only on interval watchdog timers
+ * and is used to make an interval watchdog timer fire "every" so
+ * many ticks.
+ */
+
+RTEMS_INLINE_ROUTINE void _Watchdog_Reset(
+  Watchdog_Control *the_watchdog
+)
+{
+
+  (void) _Watchdog_Remove( the_watchdog );
+
+  _Watchdog_Insert( &_Watchdog_Ticks_chain, the_watchdog );
+
+}
+
+/**
+ * This routine returns a pointer to the watchdog timer following
+ * THE_WATCHDOG on the watchdog chain.
+ */
+
+RTEMS_INLINE_ROUTINE Watchdog_Control *_Watchdog_Next(
+  Watchdog_Control *the_watchdog
+)
+{
+
+  return ( (Watchdog_Control *) the_watchdog->Node.next );
+
+}
+
+/**
+ * This routine returns a pointer to the watchdog timer preceding
+ * THE_WATCHDOG on the watchdog chain.
+ */
+
+RTEMS_INLINE_ROUTINE Watchdog_Control *_Watchdog_Previous(
+  Watchdog_Control *the_watchdog
+)
+{
+
+  return ( (Watchdog_Control *) the_watchdog->Node.previous );
+
+}
+
+/**
+ * This routine returns a pointer to the first watchdog timer
+ * on the watchdog chain HEADER.
+ */
+
+RTEMS_INLINE_ROUTINE Watchdog_Control *_Watchdog_First(
+  Chain_Control *header
+)
+{
+
+  return ( (Watchdog_Control *) _Chain_First( header ) );
+
+}
+
+/**
+ * This routine returns a pointer to the last watchdog timer
+ * on the watchdog chain HEADER.
+ */
+
+RTEMS_INLINE_ROUTINE Watchdog_Control *_Watchdog_Last(
+  Chain_Control *header
+)
+{
+
+  return ( (Watchdog_Control *) _Chain_Last( header ) );
+
+}
+
+/** @} */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
+/* end of include file */