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//==========================================================================

//

//        watchdog.cxx

//

//        Watchdog test

//

//==========================================================================

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// -------------------------------------------

// This file is part of eCos, the Embedded Configurable Operating System.

// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.

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// or inline functions from this file, or you compile this file and link it

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//####ECOSGPLCOPYRIGHTEND####

//==========================================================================

//#####DESCRIPTIONBEGIN####

//

// Author(s):     nickg

// Contributors:    nickg

// Date:          1998-07-20

// Description:   This test exercises the Watchdog class and checks that it

//                works as advertised.

//####DESCRIPTIONEND####

// -------------------------------------------------------------------------

#include <pkgconf/kernel.h>

#include <cyg/kernel/thread.hxx>

#include <cyg/kernel/thread.inl>

#include <cyg/kernel/sched.hxx>

#include <cyg/kernel/mutex.hxx>

#include <cyg/kernel/sema.hxx>

#include <cyg/kernel/clock.hxx>

#include <cyg/kernel/diag.h>

#include <cyg/io/watchdog.hxx>

#include <cyg/infra/testcase.h>

#include <cyg/infra/diag.h>

#if defined(CYGFUN_KERNEL_THREADS_TIMER) && \

    defined(CYGVAR_KERNEL_COUNTERS_CLOCK)

#include <cyg/kernel/sched.inl>

// -------------------------------------------------------------------------

// Data for the test

#ifdef CYGNUM_HAL_STACK_SIZE_TYPICAL

#define STACKSIZE CYGNUM_HAL_STACK_SIZE_TYPICAL

#else

#define STACKSIZE       (2*1024)        // size of thread stack

#endif

char thread_stack[STACKSIZE];

inline void *operator new(size_t size, void *ptr) { return ptr; };

// array of threads.

char thread[sizeof(Cyg_Thread)];

Cyg_Thread *th;

//cyg_tick_count one_sec;

cyg_tick_count watchdog_delay;

volatile bool watchdog_fired;

volatile cyg_tick_count watchdog_time;

#define WATCHDOG_LOOPS_HW               5

#define WATCHDOG_LOOPS_SIM              1

#define WATCHDOG_CYCLES_PER_LOOP_HW     10

#define WATCHDOG_CYCLES_PER_LOOP_SIM    2

#define WATCHDOG_TICKS_TILL_TIMEOUT     10

// -------------------------------------------------------------------------

// Action functions:

void watchdog_action1( CYG_ADDRWORD data )

{

    watchdog_fired = true;

    watchdog_time = Cyg_Clock::real_time_clock->current_value();

}

void watchdog_action2( CYG_ADDRWORD data )

{

    CYG_TEST_PASS_FINISH("Watchdog OK");

}

// -------------------------------------------------------------------------

// Thread body

void watchdog_thread( CYG_ADDRWORD id )

{

    cyg_tick_count watchdog_start_time;

    cyg_tick_count thread_start_time, thread_end_time;

    cyg_ucount8 watchdog_loops, watchdog_cycles_per_loop;

    if (cyg_test_is_simulator) {

        watchdog_loops = WATCHDOG_LOOPS_SIM;

        watchdog_cycles_per_loop = WATCHDOG_CYCLES_PER_LOOP_SIM;

    } else {

        watchdog_loops = WATCHDOG_LOOPS_HW;

        watchdog_cycles_per_loop = WATCHDOG_CYCLES_PER_LOOP_HW;

    }

    watchdog_fired = false;

    Cyg_Watchdog::watchdog.start();

    CYG_TEST_INFO("Testing that watchdog does not fire early");

    for (cyg_ucount8 tries = 0;  tries < watchdog_loops;  tries++) {

        diag_printf("Iteration #%d (testing over %d cycles)\n",

                    tries, watchdog_cycles_per_loop);

        // First test that the watchdog does not trigger when being reset.

        Cyg_Watchdog_Action wdaction( watchdog_action1, 0 );

        wdaction.install();

        Cyg_Watchdog::watchdog.reset();

        watchdog_start_time = Cyg_Clock::real_time_clock->current_value();

        watchdog_fired = false;

        for( cyg_ucount8 i = 0; i < watchdog_cycles_per_loop; i++ ) {

            thread_start_time = Cyg_Clock::real_time_clock->current_value();

            th->delay( watchdog_delay-2 );

            Cyg_Watchdog::watchdog.reset();

            if (watchdog_fired) {

                thread_end_time = Cyg_Clock::real_time_clock->current_value();

                diag_printf("Watchdog fired prematurely after %d ticks\n",

                            (int)(watchdog_time - watchdog_start_time));

                diag_printf("  Thread slept for %d ticks, loop #%d\n",

                            (int)(thread_end_time - thread_start_time), i);

                CYG_TEST_FAIL_FINISH("Watchdog triggered unexpectedly");

                break;

            } else {

                CYG_TEST_STILL_ALIVE(i, "Resetting watchdog...");

                Cyg_Watchdog::watchdog.reset();

                watchdog_fired = false;

                watchdog_start_time = Cyg_Clock::real_time_clock->current_value();

            }

        }

    }

    // Now check that it triggers when not reset

    CYG_TEST_INFO("Testing that watchdog fires");

    {

        Cyg_Watchdog_Action wdaction( watchdog_action2, 0 );

        wdaction.install();

        Cyg_Watchdog::watchdog.reset();

        th->delay( watchdog_delay*WATCHDOG_TICKS_TILL_TIMEOUT );

    }

    CYG_TEST_FAIL_FINISH("Watchdog failed to trigger");

}

// -------------------------------------------------------------------------

externC void

cyg_start( void )

{

    CYG_TEST_INIT();

#if !defined(CYGIMP_WATCHDOG_EMULATE) && defined(CYGPKG_HAL_MN10300_STDEVAL1)

    // Workaround for PR 17974

    if( cyg_test_is_simulator )

        CYG_TEST_NA("Watchdog device not implemented in MN10300 simulator.");

#endif

    Cyg_Clock::cyg_resolution res = Cyg_Clock::real_time_clock->get_resolution();

    cyg_uint64 wres = Cyg_Watchdog::watchdog.get_resolution();

    // Calculate how many clock ticks there are in a watchdog cycle.

    watchdog_delay = ((cyg_tick_count)wres * (cyg_tick_count)res.divisor );

    watchdog_delay /= res.dividend;

    th = new((void *)&thread) Cyg_Thread(CYG_SCHED_DEFAULT_INFO,

                                         watchdog_thread,

                                         0,

                                         "watchdog_thread",

                                         (CYG_ADDRESS)thread_stack,

                                         STACKSIZE

        );

    th->resume();

    // Get the world going

    Cyg_Scheduler::scheduler.start();

}

#else // if defined(CYGFUN_KERNEL_THREADS_TIMER) etc...

externC void

cyg_start( void )

{

    CYG_TEST_INIT();

    CYG_TEST_NA("Kernel real-time clock/threads timer disabled");

}

#endif // if defined(CYGFUN_KERNEL_THREADS_TIMER) etc...

// -------------------------------------------------------------------------

// EOF watchdog.cxx