watchdog_reset.cxx

移植到WLIT项目的redboot源代码

//==========================================================================
//
//        watchdog_reset.cxx
//
//        Watchdog reset 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):     jskov (based on watchdog.cxx)
// Contributors:  jskov, nickg
// Date:          1999-08-27
// Description:   Tests that the watchdog timer resets the board.
//                This test needs to be run by an operator - automatic
//                testing not possible.
//####DESCRIPTIONEND####
// -------------------------------------------------------------------------

#include <pkgconf/system.h>

#include <cyg/infra/testcase.h>
#include <cyg/infra/diag.h>

// Package requirements
#if defined(CYGPKG_KERNEL)

#include <pkgconf/kernel.h>

// Package option requirements
#if defined(CYGFUN_KERNEL_THREADS_TIMER) && \
    defined(CYGVAR_KERNEL_COUNTERS_CLOCK)


#include <cyg/kernel/thread.inl>

#include <cyg/hal/hal_cache.h>

#include <cyg/io/watchdog.hxx>          // watchdog API


// -------------------------------------------------------------------------
// 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;

// -------------------------------------------------------------------------
// Thread body

volatile int watchdog_accuracy = 50;

void watchdog_thread( CYG_ADDRWORD id )
{
    diag_printf("Test of watchdog timer accuracy. Expect the test to run\n"
                "for at least 10 times the watchdog timeout time. After\n"
                "that time you may have to reset the board manually and/or\n"
                "restart GDB which tends to get a little confused.\n");
    diag_printf("When you get contact with the board again, read the value\n"
                "in watchdog_accuracy - it should be close to 100 if the\n"
                "watchdog timer is accurate.\n");
                
    // Disable data cache so the variable in memory gets updated.
    HAL_DCACHE_SYNC();
    HAL_DCACHE_DISABLE();

    Cyg_Watchdog::watchdog.start();
    Cyg_Watchdog::watchdog.reset();

    while (watchdog_accuracy < 400) {
        Cyg_Watchdog::watchdog.reset();
        th->delay( watchdog_delay*watchdog_accuracy/100 );
        watchdog_accuracy += 5;
    }

    CYG_TEST_FAIL_FINISH("Watchdog failed to reset board. "
                         "Timer value is off by at least a factor of 4!");    
}

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

    
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 // CYGFUN_KERNEL_THREADS_TIMER etc...
#define N_A_MSG "Needs kernel RTC/threads timer"
#endif

#else // CYGPKG_KERNEL
#define N_A_MSG "Needs Kernel"
#endif

#ifdef N_A_MSG
void
cyg_start( void )
{
    CYG_TEST_INIT();
    CYG_TEST_NA( N_A_MSG);
}
#endif // N_A_MSG

// -------------------------------------------------------------------------
// EOF watchdog_reset.cxx