/*=================================================================
//
//        kintr0.c
//
//        Kernel C API Intr test 0
//
//==========================================================================
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//
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// 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,       
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//==========================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s):     dsm
// Contributors:  dsm, jlarmour
// Date:          1999-02-16
// Description:   Very basic test of interrupt objects
// Options:
//     CYGIMP_KERNEL_INTERRUPTS_DSRS_TABLE
//     CYGNUM_KERNEL_INTERRUPTS_DSRS_TABLE_SIZE
//     CYGIMP_KERNEL_INTERRUPTS_DSRS_LIST
//     CYGSEM_KERNEL_INTERRUPTS_DSRS_LIST_FIFO
//####DESCRIPTIONEND####
*/

#include <cyg/kernel/kapi.h>
#include <cyg/hal/hal_intr.h>

#include <cyg/infra/testcase.h>

#ifdef CYGFUN_KERNEL_API_C

#include "testaux.h"

#ifdef HAL_INTR_TEST_PRIO_A
# define PRIO_A HAL_INTR_TEST_PRIO_A
#else
# define PRIO_A 0
#endif

#ifdef HAL_INTR_TEST_PRIO_B
# define PRIO_B HAL_INTR_TEST_PRIO_B
#else
# define PRIO_B 1
#endif

#ifdef HAL_INTR_TEST_PRIO_C
# define PRIO_C HAL_INTR_TEST_PRIO_C
#else
# define PRIO_C 1
#endif

static cyg_interrupt intr_obj[2];

static cyg_handle_t intr0, intr1;


static cyg_ISR_t isr0, isr1;
static cyg_DSR_t dsr0, dsr1;

static cyg_uint32 isr0(cyg_vector_t vector, cyg_addrword_t data)
{
    CYG_UNUSED_PARAM(cyg_addrword_t, data);

    cyg_interrupt_acknowledge(vector);
    return 0;
}

static void dsr0(cyg_vector_t vector, cyg_ucount32 count, cyg_addrword_t data)
{
    CYG_UNUSED_PARAM(cyg_vector_t, vector);
    CYG_UNUSED_PARAM(cyg_ucount32, count);
    CYG_UNUSED_PARAM(cyg_addrword_t, data);
}

static cyg_uint32 isr1(cyg_vector_t vector, cyg_addrword_t data)
{
    CYG_UNUSED_PARAM(cyg_vector_t, vector);
    CYG_UNUSED_PARAM(cyg_addrword_t, data);
    return 0;
}

static void dsr1(cyg_vector_t vector, cyg_ucount32 count, cyg_addrword_t data)
{
    CYG_UNUSED_PARAM(cyg_vector_t, vector);
    CYG_UNUSED_PARAM(cyg_ucount32, count);
    CYG_UNUSED_PARAM(cyg_addrword_t, data);
}

static bool flash( void )
{
    cyg_handle_t handle;
    cyg_interrupt intr;

    cyg_interrupt_create(CYGNUM_HAL_ISR_MIN, PRIO_A, (cyg_addrword_t)333,
                         isr0, dsr0, &handle, &intr );
    cyg_interrupt_delete(handle);

    return true;
}

/* IMPORTANT: The calling convention for VSRs is target dependent.  It is
 * unlikely that a plain C or C++ routine would function correctly on any
 * particular platform, even if it could correctly access the system
 * resources necessary to handle the event that caused it to be called.
 * VSRs usually must be written in assembly language.
 * 
 * This is just a test program.  The routine vsr0() below is defined simply
 * to define an address that will be in executable memory.  If an event
 * causes this VSR to be called, all bets are off.  If it is accidentally
 * installed in the vector for the realtime clock, the system will likely
 * freeze.
 */

static cyg_VSR_t vsr0;

static void vsr0(void)
{
}

static void (*vsr0_p)(void) = vsr0;

void kintr0_main( void )
{
    cyg_vector_t v = (CYGNUM_HAL_VSR_MIN + 11) % CYGNUM_HAL_VSR_COUNT;
    cyg_vector_t v1;
    cyg_vector_t lvl1 = CYGNUM_HAL_ISR_MIN + (1 % CYGNUM_HAL_ISR_COUNT);
    cyg_vector_t lvl2 = CYGNUM_HAL_ISR_MIN + (15 % CYGNUM_HAL_ISR_COUNT);
    int in_use;

    cyg_VSR_t *old_vsr, *new_vsr;

    CYG_TEST_INIT();
 
#ifdef CYGPKG_HAL_MIPS_TX39    
    // This can be removed when PR 17831 is fixed
    if ( cyg_test_is_simulator )
        v1 = 12 % CYGNUM_HAL_ISR_COUNT;
    else /* NOTE TRAILING ELSE... */
#endif
    v1 = CYGNUM_HAL_ISR_MIN + ( 6 % CYGNUM_HAL_ISR_COUNT);

    CHECK(flash());
    CHECK(flash());

    // Make sure the chosen levels are not already in use.
    HAL_INTERRUPT_IN_USE( lvl1, in_use );
    intr0 = 0;
    if (!in_use)
        cyg_interrupt_create(lvl1, PRIO_B, (cyg_addrword_t)777,
                             isr0, dsr0, &intr0, &intr_obj[0]);
    
    HAL_INTERRUPT_IN_USE( lvl2, in_use );
    intr1 = 0;
    if (!in_use && lvl1 != lvl2)
        cyg_interrupt_create(lvl2, PRIO_C, 888,
                             isr1, dsr1, &intr1, &intr_obj[1]);

    // Check these functions at least exist

    cyg_interrupt_disable();
    cyg_interrupt_enable();

    if (intr0)
        cyg_interrupt_attach(intr0);
    if (intr1)
        cyg_interrupt_attach(intr1);
    if (intr0)
        cyg_interrupt_detach(intr0);
    if (intr1)
        cyg_interrupt_detach(intr1);

    // If this attaching interrupt replaces the previous interrupt
    // instead of adding to it we could be in a big mess if the
    // vector is being used by something important.
        
    cyg_interrupt_get_vsr( v, &old_vsr );
    cyg_interrupt_set_vsr( v, vsr0 );
    cyg_interrupt_get_vsr( v, &new_vsr );
    CHECK( vsr0 == new_vsr );

    new_vsr = NULL;
    cyg_interrupt_get_vsr( v, &new_vsr );
    cyg_interrupt_set_vsr( v, old_vsr );
    CHECK( new_vsr == vsr0 );

    cyg_interrupt_set_vsr( v, new_vsr );
    new_vsr = NULL;
    cyg_interrupt_get_vsr( v, &new_vsr );       
    CHECK( vsr0 == new_vsr );

    cyg_interrupt_set_vsr( v, old_vsr );
    CHECK( vsr0 == new_vsr );
    new_vsr = NULL;
    cyg_interrupt_get_vsr( v, &new_vsr );
    CHECK( old_vsr == new_vsr );
        
    CHECK( NULL != *vsr0_p );

    cyg_interrupt_mask(v1);
    cyg_interrupt_unmask(v1);
        
    cyg_interrupt_configure(v1, true, true);

    CYG_TEST_PASS_FINISH("Kernel C API Intr 0 OK");
}

externC void
cyg_start( void )
{ 
    kintr0_main();
}

#else /* def CYGFUN_KERNEL_API_C */
externC void
cyg_start( void )
{
    CYG_TEST_INIT();
    CYG_TEST_NA("Kernel C API layer disabled");
}
#endif /* def CYGFUN_KERNEL_API_C */

/* EOF kintr0.c */
