/* int.c --- M32C interrupt handling. Copyright (C) 2005-2013 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 . */ #include "int.h" #include "cpu.h" #include "mem.h" 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; 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)); } void trigger_fixed_interrupt (int addr) { trigger_interrupt (addr, 1); } void trigger_based_interrupt (int vector) { int addr = get_reg (intb) + vector * 4; 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); }