target/nios2/op_helper.c

   1 /*
   2  * Altera Nios II helper routines.
   3  *
   4  * Copyright (C) 2012 Chris Wulff <crwulff@gmail.com>
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, see
  18  * <http://www.gnu.org/licenses/lgpl-2.1.html>
  19  */
  20
  21 #include "qemu/osdep.h"
  22 #include "cpu.h"
  23 #include "exec/helper-proto.h"
  24 #include "exec/cpu_ldst.h"
  25 #include "qemu/main-loop.h"
  26
  27 #if !defined(CONFIG_USER_ONLY)
  28 void helper_mmu_read_debug(CPUNios2State *env, uint32_t rn)
  29 {
  30     mmu_read_debug(env, rn);
  31 }
  32
  33 void helper_mmu_write(CPUNios2State *env, uint32_t rn, uint32_t v)
  34 {
  35     mmu_write(env, rn, v);
  36 }
  37
  38 void helper_check_interrupts(CPUNios2State *env)
  39 {
  40     qemu_mutex_lock_iothread();
  41     nios2_check_interrupts(env);
  42     qemu_mutex_unlock_iothread();
  43 }
  44 #endif /* !CONFIG_USER_ONLY */
  45
  46 void helper_raise_exception(CPUNios2State *env, uint32_t index)
  47 {
  48     CPUState *cs = ENV_GET_CPU(env);
  49     cs->exception_index = index;
  50     cpu_loop_exit(cs);
  51 }