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Diffstat (limited to 'sim/m32c/int.c')
-rw-r--r-- | sim/m32c/int.c | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/sim/m32c/int.c b/sim/m32c/int.c new file mode 100644 index 0000000..8f03515 --- /dev/null +++ b/sim/m32c/int.c @@ -0,0 +1,61 @@ +/* int.c --- M32C interrupt handling. + +Copyright (C) 2005 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. + +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. + +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 */ + + +#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); +} |