LXR qemu/translate-common.c

   1/*
   2 *  Host code generation common components
   3 *
   4 *  Copyright (c) 2015 Peter Crosthwaite <crosthwaite.peter@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 "qemu-common.h"
  22#include "qom/cpu.h"
  23
  24uintptr_t qemu_real_host_page_size;
  25intptr_t qemu_real_host_page_mask;
  26
  27#ifndef CONFIG_USER_ONLY
  28/* mask must never be zero, except for A20 change call */
  29static void tcg_handle_interrupt(CPUState *cpu, int mask)
  30{
  31    int old_mask;
  32
  33    old_mask = cpu->interrupt_request;
  34    cpu->interrupt_request |= mask;
  35
  36    /*
  37     * If called from iothread context, wake the target cpu in
  38     * case its halted.
  39     */
  40    if (!qemu_cpu_is_self(cpu)) {
  41        qemu_cpu_kick(cpu);
  42        return;
  43    }
  44
  45    if (use_icount) {
  46        cpu->icount_decr.u16.high = 0xffff;
  47        if (!cpu->can_do_io
  48            && (mask & ~old_mask) != 0) {
  49            cpu_abort(cpu, "Raised interrupt while not in I/O function");
  50        }
  51    } else {
  52        cpu->tcg_exit_req = 1;
  53    }
  54}
  55
  56CPUInterruptHandler cpu_interrupt_handler = tcg_handle_interrupt;
  57#endif
  58