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//==========================================================================

//

//      hal_boot.c

//

//      SPARClite Architecture specific interrupt dispatch tables

//

//==========================================================================

// ####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    

// the terms of the GNU General Public License as published by the Free     

// Software Foundation; either version 2 or (at your option) any later      

// version.                                                                 

//

// eCos is distributed in the hope that it will be useful, but WITHOUT      

// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or    

// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License    

// for more details.                                                        

//

// You should have received a copy of the GNU General Public License        

// along with eCos; if not, write to the Free Software Foundation, Inc.,    

// 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.            

//

// 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   

// the GNU General Public License. However the source code for this file    

// 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.         

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

// ####ECOSGPLCOPYRIGHTEND####                                              

//==========================================================================

//#####DESCRIPTIONBEGIN####

//

// Author(s):    hmt

// Contributors: hmt

// Date:         1998-12-10

// Purpose:      Interrupt handler tables for SPARClite.

//              

//####DESCRIPTIONEND####

//

//==========================================================================

#include <pkgconf/hal.h>

#include <cyg/infra/cyg_type.h>

/*------------------------------------------------------------------------*/

/* calling this is our raison d'etre: */

extern void cyg_start( void );

/*------------------------------------------------------------------------*/

/* data copy and bss zero functions                                       */

typedef void (CYG_ROM_ADDRESS)(void);

#ifdef CYG_HAL_STARTUP_ROM      

void hal_copy_data(void)

{

    extern char __ram_data_start;

    extern char __ram_data_end;

    extern CYG_ROM_ADDRESS __rom_data_start;

    long *p = (long *)&__ram_data_start;

    long *q = (long *)&__rom_data_start;

    while( p <= (long *)&__ram_data_end )

        *p++ = *q++;

}

#endif

void hal_zero_bss(void)

{

    extern CYG_ROM_ADDRESS __bss_start;

    extern CYG_ROM_ADDRESS __bss_end;

    register long long zero = 0;

    register long long *end = (long long *)&__bss_end;

    register long long *p = (long long *)&__bss_start;

    while( p <= end )

        *p++ = zero;

}

#ifdef CYGSEM_HAL_STOP_CONSTRUCTORS_ON_FLAG

cyg_bool cyg_hal_stop_constructors;

#endif

void

cyg_hal_invoke_constructors (void)

{

    typedef void (*pfunc) (void);

    extern pfunc __CTOR_LIST__[];

    extern pfunc __CTOR_END__[];

#ifdef CYGSEM_HAL_STOP_CONSTRUCTORS_ON_FLAG

    static pfunc *p = &__CTOR_END__[-1];

    cyg_hal_stop_constructors = 0;

    for (; p >= __CTOR_LIST__; p--) {

        (*p) ();

        if (cyg_hal_stop_constructors) {

            p--;

            break;

        }

    }

#else

    pfunc *p;

    for (p = &__CTOR_END__[-1]; p >= __CTOR_LIST__; p--)

        (*p) ();

#endif

}

// Override any __gccmain the compiler might generate. We don't want

// constructors to be called twice.

void  __gccmain(void) {}

/*------------------------------------------------------------------------*/

/*   CYG_HAL_START - pre-main-entrypoint                                  */

#ifdef CYGPKG_HAL_SPARCLITE_SLEB

#define SLEB_LED (*(volatile char *)(0x02000003))

#define LED( _x_ ) SLEB_LED = (char)(0xff & ~(_x_))

#else

#define LED( _x_ ) CYG_EMPTY_STATEMENT

#endif

extern void hal_board_prestart( void );

extern void hal_board_poststart( void );

// This is called with traps enabled, but interrupts masked out:

// Be sure to enable them in hal_board_poststart() at the latest.

void cyg_hal_start( void )

{

    /* Board specific prestart that's best done in C */

    hal_board_prestart();

    LED( 0xd0 );

#ifdef CYG_HAL_STARTUP_ROM

    /* Copy data from ROM to RAM */

    hal_copy_data();

#endif

    LED( 0xd4 );

    /* Zero BSS */

    hal_zero_bss();

    LED( 0xd8 );

    /* Call constructors */

    cyg_hal_invoke_constructors();

    LED( 0xdc );

    /* Board specific late startup that's best done in C */

    hal_board_poststart();

    LED( 0xf8 );

    /* Call cyg_start */

    cyg_start(); /* does not return */

}

// EOF hal_boot.c