//==========================================================================////        watchdog.cxx////        Watchdog test////==========================================================================//####COPYRIGHTBEGIN####//                                                                          // -------------------------------------------                              // The contents of this file are subject to the Red Hat eCos Public License // Version 1.1 (the "License"); you may not use this file except in         // compliance with the License.  You may obtain a copy of the License at    // http://www.redhat.com/                                                   //                                                                          // Software distributed under the License is distributed on an "AS IS"      // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.  See the // License for the specific language governing rights and limitations under // the License.                                                             //                                                                          // The Original Code is eCos - Embedded Configurable Operating System,      // released September 30, 1998.                                             //                                                                          // The Initial Developer of the Original Code is Red Hat.                   // Portions created by Red Hat are                                          // Copyright (C) 1998, 1999, 2000 Red Hat, Inc.                             // All Rights Reserved.                                                     // -------------------------------------------                              //                                                                          //####COPYRIGHTEND####//==========================================================================//#####DESCRIPTIONBEGIN####//// Author(s):     nickg// Contributors:    nickg// Date:          1998-07-20// Description:   Tests the Kernel Wall Clock//                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/devs/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#endifchar 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 bodyvoid 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 voidcyg_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 voidcyg_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