//=============================================================================
//
//      hal_misc.c
//
//      HAL miscellaneous functions
//
//=============================================================================
//####COPYRIGHTBEGIN####
//
// -------------------------------------------
// The contents of this file are subject to the Cygnus eCos Public License
// Version 1.0 (the "License"); you may not use this file except in
// compliance with the License.  You may obtain a copy of the License at
// http://sourceware.cygnus.com/ecos
// 
// 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 Cygnus Operating System, released
// September 30, 1998.
// 
// The Initial Developer of the Original Code is Cygnus.  Portions created
// by Cygnus are Copyright (C) 1998 Cygnus Solutions.  All Rights Reserved.
// -------------------------------------------
//
//####COPYRIGHTEND####
//=============================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s):   nickg
// Contributors:        nickg
// Date:        1997-11-12
// Purpose:     HAL miscellaneous functions
// Description: This file contains miscellaneous functions provided by the
//              HAL.
//
//####DESCRIPTIONEND####
//
//=============================================================================

#include <pkgconf/hal.h>

#include <cyg/infra/cyg_type.h>
#include <cyg/infra/cyg_trac.h>         // tracing macros
#include <cyg/infra/cyg_ass.h>          // assertion macros

#include <cyg/hal/hal_arch.h>           // HAL header

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

void cyg_hal_invoke_constructors (void)
{
    static int initialized = 0;

    if (! initialized)
    {
        typedef void (*pfunc) (void);
        extern pfunc __CTOR_LIST__[];
        extern pfunc __CTOR_END__[];
        pfunc *p;

        initialized = 1;

        for (p = &__CTOR_END__[0]-1; p >= __CTOR_LIST__; p--){
            (*p) ();
        }
    }
}

// Override any __eabi the compiler might generate. We don't want
// constructors to be called twice.
void __eabi (void) {}

//---------------------------------------------------------------------------
// First level C exception handler.

externC void __handle_exception (void);

externC HAL_SavedRegisters *_hal_registers;

void exception_handler(HAL_SavedRegisters *regs)
{
#ifdef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS

    // Set the pointer to the registers of the current exception
    // context. At entry the GDB stub will expand the
    // HAL_SavedRegisters structure into a (bigger) register array.
    _hal_registers = regs;

    __handle_exception();

#elif defined(CYGFUN_HAL_COMMON_KERNEL_SUPPORT) && defined(CYGPKG_HAL_EXCEPTIONS)

    // We should decode the vector and pass a more appropriate
    // value as the second argument. For now we simply pass a
    // pointer to the saved registers. We should also divert
    // breakpoint and other debug vectors into the debug stubs.

    deliver_exception( regs->vector>>8, (CYG_ADDRWORD)regs );

#else

    CYG_FAIL("Exception!!!");
    
#endif    
    
    return;
}

//---------------------------------------------------------------------------
// Default ISR

externC cyg_uint32 hal_default_isr(CYG_ADDRWORD vector, CYG_ADDRWORD data)
{
    CYG_TRACE1(true, "Interrupt: %d", vector);
    CYG_FAIL("Spurious Interrupt!!!");
    return 0;
}

//---------------------------------------------------------------------------
// Idle thread action

void hal_idle_thread_action( cyg_uint32 count )
{
}

//---------------------------------------------------------------------------
// End of hal_misc.c