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

//

//      plf_stub.c

//

//      Platform specific code for GDB stub support.

//

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

//####ECOSGPLCOPYRIGHTBEGIN####

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

// This file is part of eCos, the Embedded Configurable Operating System.

// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, 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

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// 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

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// 59 Temple Place, Suite 330, Boston, MA 02111-1307 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

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//####ECOSGPLCOPYRIGHTEND####

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

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

//

// Author(s):   nickg, jskov (based on the old tx39 hal_stub.c)

// Contributors:nickg, jskov

// Date:        1999-02-12

// Purpose:     Platform specific code for GDB stub support.

//              

//####DESCRIPTIONEND####

//

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

#include <pkgconf/hal.h>

#ifdef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS

#include <cyg/hal/hal_stub.h>

#include <cyg/hal/hal_io.h>             // HAL IO macros

#include <cyg/hal/hal_diag.h>           // diag output. FIXME

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

// Serial definitions.

#define DIAG_BASE       0xfffff300

#define DIAG_SLCR       (DIAG_BASE+0x00)

#define DIAG_SLSR       (DIAG_BASE+0x04)

#define DIAG_SLDICR     (DIAG_BASE+0x08)

#define DIAG_SLDISR     (DIAG_BASE+0x0C)

#define DIAG_SFCR       (DIAG_BASE+0x10)

#define DIAG_SBRG       (DIAG_BASE+0x14)

#define DIAG_TFIFO      (DIAG_BASE+0x20)

#define DIAG_RFIFO      (DIAG_BASE+0x30)

#define BRG_T0          0x0000

#define BRG_T2          0x0100

#define BRG_T4          0x0200

#define BRG_T5          0x0300

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

// Initialize the current serial port.

void hal_jmr_init_serial( void )

{

//hal_diag_led(0x10);    

    HAL_WRITE_UINT16( DIAG_SLCR , 0x0020 );

    HAL_WRITE_UINT16( DIAG_SLDICR , 0x0000 );

    HAL_WRITE_UINT16( DIAG_SFCR , 0x0000 );

//    HAL_WRITE_UINT16( DIAG_SBRG , BRG_T2 | 20 );

//    HAL_WRITE_UINT16( DIAG_SBRG , BRG_T2 | 10 );

    HAL_WRITE_UINT16( DIAG_SBRG , BRG_T2 | 5 );

//hal_diag_led(0x10);

}

// Write C to the current serial port.

void hal_jmr_put_char( int c )

{

    CYG_WORD16 disr;

//hal_diag_led(0x20);

    for(;;)

    {

        HAL_READ_UINT16( DIAG_SLDISR , disr );

        if( disr & 0x0002 ) break;

    }

    disr = disr & ~0x0002;

    HAL_WRITE_UINT8( DIAG_TFIFO, c );

    HAL_WRITE_UINT16( DIAG_SLDISR , disr );

//hal_diag_led(0x20);

//    HAL_DIAG_WRITE_CHAR( c );

}

// Read one character from the current serial port.

int hal_jmr_get_char( void )

{

#ifdef CYGPKG_HAL_MIPS_SIM

    // FIXME: ask nickg if this can go to /dev/null

    static char input[] = "+$s#73";

    static int i = 0;

    return input[i++];

#else

    char c;

    CYG_WORD16 disr;

//hal_diag_led(0x40);        

    for(;;)

    {

        HAL_READ_UINT16( DIAG_SLDISR , disr );

        if( disr & 0x0001 ) break;

    }

    disr = disr & ~0x0001;

    HAL_READ_UINT8( DIAG_RFIFO, c );

    HAL_WRITE_UINT16( DIAG_SLDISR , disr );

//hal_diag_led(0x40);

//    HAL_DIAG_READ_CHAR(c);

//    diag_printf("<%02x:%c>",c);

    return c;

#endif    

}

#endif // ifdef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS

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

// End of plf_stub.c