/* int.c --- M32C interrupt handling.
-Copyright (C) 2005 Free Software Foundation, Inc.
+Copyright (C) 2005-2020 Free Software Foundation, Inc.
Contributed by Red Hat, Inc.
This file is part of the GNU simulators.
-The GNU simulators are free software; you can redistribute them and/or
-modify them under the terms of the GNU General Public License as
-published by the Free Software Foundation; either version 2 of the
-License, or (at your option) any later version.
+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.
-The GNU simulators are distributed in the hope that they 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.
+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 the GNU simulators; if not, write to the Free Software
-Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
-02110-1301, USA */
+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)
+static void
+trigger_interrupt (int addr, int clear_u)
{
int s = get_reg (sp);
int f = get_reg (flags);
int p = get_reg (pc);
+ if (clear_u)
+ set_flags (FLAGBIT_U, 0);
+ set_flags (FLAGBIT_I | FLAGBIT_D, 0);
+
if (A16)
{
s -= 4;
mem_put_hi (s + 4, f);
}
put_reg (pc, mem_get_psi (addr));
- set_flags (FLAGBIT_U | FLAGBIT_I | FLAGBIT_D, 0);
+}
+
+void
+trigger_fixed_interrupt (int addr)
+{
+ trigger_interrupt (addr, 1);
}
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);
+ trigger_interrupt (addr, vector <= 31);
+}
+
+void
+trigger_peripheral_interrupt (int vector, int icaddr)
+{
+ unsigned char old_ic = mem_get_qi (icaddr);
+ int addr = get_reg (intb) + vector * 4;
+ trigger_interrupt (addr, 1);
+ put_reg (flags, (get_reg (flags) & 0x8fff) | ((old_ic & 7) << 12));
+ mem_put_qi (icaddr, old_ic & ~ 0x08);
}