LXR qemu/target/nios2/op

   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 "exec/exec-all.h"
  26#include "qemu/main-loop.h"
  27
  28#if !defined(CONFIG_USER_ONLY)
  29void helper_mmu_read_debug(CPUNios2State *env, uint32_t rn)
  30{
  31    mmu_read_debug(env, rn);
  32}
  33
  34void helper_mmu_write(CPUNios2State *env, uint32_t rn, uint32_t v)
  35{
  36    mmu_write(env, rn, v);
  37}
  38
  39static void nios2_check_interrupts(CPUNios2State *env)
  40{
  41    if (env->irq_pending &&
  42        (env->regs[CR_STATUS] & CR_STATUS_PIE)) {
  43        env->irq_pending = 0;
  44        cpu_interrupt(env_cpu(env), CPU_INTERRUPT_HARD);
  45    }
  46}
  47
  48void helper_check_interrupts(CPUNios2State *env)
  49{
  50    qemu_mutex_lock_iothread();
  51    nios2_check_interrupts(env);
  52    qemu_mutex_unlock_iothread();
  53}
  54#endif /* !CONFIG_USER_ONLY */
  55
  56void helper_raise_exception(CPUNios2State *env, uint32_t index)
  57{
  58    CPUState *cs = env_cpu(env);
  59    cs->exception_index = index;
  60    cpu_loop_exit(cs);
  61}
  62