62 lines
1.5 KiB
C
62 lines
1.5 KiB
C
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/* int.c --- M32C interrupt handling.
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Copyright (C) 2005 Free Software Foundation, Inc.
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Contributed by Red Hat, Inc.
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This file is part of the GNU simulators.
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The GNU simulators are free software; you can redistribute them and/or
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modify them under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU simulators are distributed in the hope that they will be
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useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with the GNU simulators; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301, USA */
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#include "int.h"
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#include "cpu.h"
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#include "mem.h"
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void
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trigger_fixed_interrupt (int addr)
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{
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int s = get_reg (sp);
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int f = get_reg (flags);
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int p = get_reg (pc);
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if (A16)
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{
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s -= 4;
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put_reg (sp, s);
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mem_put_hi (s, p);
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mem_put_qi (s + 2, f);
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mem_put_qi (s + 3, ((f >> 4) & 0x0f) | (p >> 16));
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}
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else
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{
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s -= 6;
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put_reg (sp, s);
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mem_put_si (s, p);
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mem_put_hi (s + 4, f);
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}
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put_reg (pc, mem_get_psi (addr));
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set_flags (FLAGBIT_U | FLAGBIT_I | FLAGBIT_D, 0);
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}
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void
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trigger_based_interrupt (int vector)
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{
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int addr = get_reg (intb) + vector * 4;
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if (vector <= 31)
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set_flags (FLAGBIT_U, 0);
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trigger_fixed_interrupt (addr);
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}
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