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/* int.c --- M32C interrupt handling.

Copyright (C) 2005, 2007, 2008 Free Software Foundation, Inc.

Contributed by Red Hat, Inc.

This file is part of the GNU simulators.

This program 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 3 of the License, or

(at your option) any later version.

This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.  */

#include "int.h"

#include "cpu.h"

#include "mem.h"

void

trigger_fixed_interrupt (int addr)

{

  int s = get_reg (sp);

  int f = get_reg (flags);

  int p = get_reg (pc);

  if (A16)

    {

      s -= 4;

      put_reg (sp, s);

      mem_put_hi (s, p);

      mem_put_qi (s + 2, f);

      mem_put_qi (s + 3, ((f >> 4) & 0x0f) | (p >> 16));

    }

  else

    {

      s -= 6;

      put_reg (sp, s);

      mem_put_si (s, p);

      mem_put_hi (s + 4, f);

    }

  put_reg (pc, mem_get_psi (addr));

  set_flags (FLAGBIT_U | FLAGBIT_I | FLAGBIT_D, 0);

}

void

trigger_based_interrupt (int vector)

{

  int addr = get_reg (intb) + vector * 4;

  if (vector <= 31)

    set_flags (FLAGBIT_U, 0);

  trigger_fixed_interrupt (addr);

}