LXR qemu/target/openrisc/exception

   1/*
   2 * OpenRISC exception helper routines
   3 *
   4 * Copyright (c) 2011-2012 Jia Liu <proljc@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 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 <http://www.gnu.org/licenses/>.
  18 */
  19
  20#include "qemu/osdep.h"
  21#include "cpu.h"
  22#include "exec/exec-all.h"
  23#include "exec/helper-proto.h"
  24#include "exception.h"
  25
  26void HELPER(exception)(CPUOpenRISCState *env, uint32_t excp)
  27{
  28    OpenRISCCPU *cpu = openrisc_env_get_cpu(env);
  29
  30    raise_exception(cpu, excp);
  31}
  32
  33static void QEMU_NORETURN do_range(CPUOpenRISCState *env, uintptr_t pc)
  34{
  35    OpenRISCCPU *cpu = openrisc_env_get_cpu(env);
  36    CPUState *cs = CPU(cpu);
  37
  38    cs->exception_index = EXCP_RANGE;
  39    cpu_loop_exit_restore(cs, pc);
  40}
  41
  42void HELPER(ove_cy)(CPUOpenRISCState *env)
  43{
  44    if (env->sr_cy) {
  45        do_range(env, GETPC());
  46    }
  47}
  48
  49void HELPER(ove_ov)(CPUOpenRISCState *env)
  50{
  51    if (env->sr_ov < 0) {
  52        do_range(env, GETPC());
  53    }
  54}
  55
  56void HELPER(ove_cyov)(CPUOpenRISCState *env)
  57{
  58    if (env->sr_cy || env->sr_ov < 0) {
  59        do_range(env, GETPC());
  60    }
  61}
  62