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//==========================================================================
//
//        intr0.c
//
//        Interrupt controls test
//
//==========================================================================
// ####ECOSGPLCOPYRIGHTBEGIN####                                            
// -------------------------------------------                              
// This file is part of eCos, the Embedded Configurable Operating System.   
// Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
//
// eCos is free software; you can redistribute it and/or modify it under    
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// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License    
// for more details.                                                        
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//
// As a special exception, if other files instantiate templates or use      
// macros or inline functions from this file, or you compile this file      
// and link it with other works to produce a work based on this file,       
// this file does not by itself cause the resulting work to be covered by   
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// must still be made available in accordance with section (3) of the GNU   
// General Public License v2.                                               
//
// This exception does not invalidate any other reasons why a work based    
// on this file might be covered by the GNU General Public License.         
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// ####ECOSGPLCOPYRIGHTEND####                                              
//==========================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s):     jskov
// Contributors:  jskov
// Date:          2001-01-18
//####DESCRIPTIONEND####
//==========================================================================
 
#include <pkgconf/system.h>
 
#include <cyg/infra/testcase.h>
 
#if defined(CYGPKG_KERNEL)
 
#include <pkgconf/kernel.h>
 
#if defined(CYGFUN_KERNEL_API_C)
 
#include <cyg/hal/hal_arch.h>           // CYGNUM_HAL_STACK_SIZE_TYPICAL
 
#include <cyg/kernel/kapi.h>
 
#include <cyg/hal/hal_intr.h>
 
// -------------------------------------------------------------------------
 
#define NTHREADS 1
#define STACKSIZE CYGNUM_HAL_STACK_SIZE_TYPICAL
 
static cyg_handle_t thread[NTHREADS];
 
static cyg_thread thread_obj[NTHREADS];
static char stack[NTHREADS][STACKSIZE];
 
// -------------------------------------------------------------------------
 
// This is (tick time * 1.5) 
#define TICK_DELAY (1500000 / CYGNUM_HAL_RTC_DENOMINATOR)
 
static void
entry0( cyg_addrword_t data )
{
    int tick;
 
    // Scheduler and thus timer interrupts are running by the
    // time we get here.
 
    // Wait for next tick
    tick = cyg_current_time();
    do {} while (cyg_current_time() == tick);
    tick = cyg_current_time();
 
    // Then mask timer interrupts
    HAL_INTERRUPT_MASK(CYGNUM_HAL_INTERRUPT_RTC);
 
    // and wait for the time when the next tick should have come
    // and check it didn't trigger an interrupt
    hal_delay_us(TICK_DELAY);
    CYG_TEST_CHECK(cyg_current_time() == tick, "Timer interrupt while masked");
 
    // Now change interrupt level, and make the check again. Changing
    // level should not affect interrupt mask state.
    HAL_INTERRUPT_SET_LEVEL(CYGNUM_HAL_INTERRUPT_RTC, 8);
    hal_delay_us(TICK_DELAY);
    CYG_TEST_CHECK(cyg_current_time() == tick, 
                   "Timer interrupt after changing level");
 
    // Finally unmask the interrupt and make sure it results in ticks.
    HAL_INTERRUPT_UNMASK(CYGNUM_HAL_INTERRUPT_RTC);
    hal_delay_us(TICK_DELAY);
    CYG_TEST_CHECK(cyg_current_time() != tick, 
                   "No timer interrupt after unmask");
 
    CYG_TEST_PASS_FINISH("SH intr0 test end");
}
 
// -------------------------------------------------------------------------
 
externC void
cyg_start( void )
{
    CYG_TEST_INIT();
 
    cyg_thread_create(4, entry0 , (cyg_addrword_t)0, "intr",
        (void *)stack[0], STACKSIZE, &thread[0], &thread_obj[0]);
    cyg_thread_resume(thread[0]);
 
    cyg_scheduler_start();
}
 
// -------------------------------------------------------------------------
 
#else // def CYGFUN_KERNEL_API_C
#define N_A_MSG "Kernel C API layer disabled"
#endif // def CYGFUN_KERNEL_API_C
#else // def CYGPKG_KERNEL
#define N_A_MSG "Needs kernel"
#endif // def CYGPKG_KERNEL
 
#ifdef N_A_MSG
externC void
cyg_start( void )
{
    CYG_TEST_INIT();
    CYG_TEST_NA( N_A_MSG );
}
#endif // N_A_MSG
 
// -------------------------------------------------------------------------
// EOF intr0.c