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

//

//      breakpoints.c

//

//      Support aribtrary set of breakpoints.

//

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

//####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

// 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.,

// 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

// 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.

//

// This exception does not invalidate any other reasons why a work based on

// this file might be covered by the GNU General Public License.

//

// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.

// at http://sources.redhat.com/ecos/ecos-license/

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

//####ECOSGPLCOPYRIGHTEND####

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

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

//

// Author(s):    

// Contributors: gthomas

// Date:         1999-10-20

// Purpose:      

// Description:  

//               

//

//####DESCRIPTIONEND####

//

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

#include "board.h"

#ifndef USE_ECOS_HAL_BREAKPOINTS

#include <stdlib.h>

#ifdef HAVE_BSP

#include <bsp/bsp.h>

#include <bsp/cpu.h>

#endif

#include "monitor.h"

#include "tservice.h"

#include "stub-tservice.h"

#include "fmt_util.h"

static struct bp *last_bp_ptr;

static struct bp *first_bp_ptr;

#ifdef NO_MALLOC

static struct bp *free_bp_list;

static struct bp bp_list[MAX_NUM_BP];

static int       curr_bp_num;

#endif

int

add_mon_breakpoint (mem_addr_t location)

{

  struct bp *ptr;

  struct bp *new_bp_ptr;

  for (ptr = first_bp_ptr; ptr != NULL; ptr = ptr->next)

    {

      if (MEM_ADDR_EQ_P (ptr->address, location))

        return 1;

    }

#ifdef NO_MALLOC

  if (free_bp_list != NULL)

    {

      new_bp_ptr = free_bp_list;

      free_bp_list = new_bp_ptr->next;

    }

  else

    {

      if (curr_bp_num < MAX_NUM_BP)

        {

          new_bp_ptr = &bp_list[curr_bp_num++];

        }

      else

        {

          xprintf ("No more breakpoints\n");

          return 1;

        }

    }

#else

  new_bp_ptr = (struct bp *)malloc (sizeof (struct bp));

#endif

  if (first_bp_ptr == NULL)

    {

      first_bp_ptr = new_bp_ptr;

    }

  else

    {

      last_bp_ptr->next = new_bp_ptr;

    }

  last_bp_ptr = new_bp_ptr;

  last_bp_ptr->next = NULL;

  last_bp_ptr->address = location;

  last_bp_ptr->in_memory = 0;

  return 0;

}

void

install_breakpoints (void)

{

  struct bp *ptr = first_bp_ptr;

  while (ptr != NULL)

    {

      set_breakpoint (ptr);

      ptr = ptr->next;

    }

}

void

clear_breakpoints (void)

{

  struct bp *ptr = first_bp_ptr;

  while (ptr != NULL)

    {

      clear_breakpoint (ptr);

      ptr = ptr->next;

    }

}

int

show_breakpoints (void)

{

  struct bp *ptr;

  for (ptr = first_bp_ptr; ptr != NULL; ptr = ptr->next)

    {

      char buf[20];

      addr2str (&ptr->address, buf);

      xprintf ("%s\n", buf);

    }

  return 0;

}

int

clear_mon_breakpoint (mem_addr_t location)

{

  int error = 0;

  struct bp *ptr = first_bp_ptr;

  struct bp *prev_ptr = NULL;

  /* Scan the list looking for the address to clear */

  while (ptr != NULL && !MEM_ADDR_EQ_P (ptr->address, location))

    {

      /* keep a pointer one behind the current position */

      prev_ptr = ptr;

      ptr = ptr->next;

    }

  if (ptr == NULL)

    {

      xprintf ("That address has no breakpoint on it.\n");

      error = 1;

    }

  else

    {

      /* Just in case it's still in memory. */

      clear_breakpoint (ptr);

      /* now we'll point the previous bp->next at the one after the one

         we're deleting, unless there is no previous bp. */

      if (prev_ptr != NULL)

        {

          prev_ptr->next = ptr->next;

        }

      if (first_bp_ptr == ptr)

        first_bp_ptr = ptr->next;

      if (last_bp_ptr == ptr)

        last_bp_ptr = prev_ptr;

      /* eliminate the offending bp struct */

#ifdef NO_MALLOC

      ptr->next = free_bp_list;

      free_bp_list = ptr;

#else

      free (ptr);

#endif

    }

  return error;

}

#endif /* USE_ECOS_HAL_BREAKPOINTS */