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#include "sysemu/cpus.h"
  24
  25uintptr_t qemu_real_host_page_size;
  26intptr_t qemu_real_host_page_mask;
  27
  28#ifndef CONFIG_USER_ONLY
  29/* mask must never be zero, except for A20 change call */
  30static void tcg_handle_interrupt(CPUState *cpu, int mask)
  31{
  32    int old_mask;
  33
  34    old_mask = cpu->interrupt_request;
  35    cpu->interrupt_request |= mask;
  36
  37    /*
  38     * If called from iothread context, wake the target cpu in
  39     * case its halted.
  40     */
  41    if (!qemu_cpu_is_self(cpu)) {
  42        qemu_cpu_kick(cpu);
  43        return;
  44    }
  45
  46    if (use_icount) {
  47        cpu->icount_decr.u16.high = 0xffff;
  48        if (!cpu->can_do_io
  49            && (mask & ~old_mask) != 0) {
  50            cpu_abort(cpu, "Raised interrupt while not in I/O function");
  51        }
  52    } else {
  53        cpu->tcg_exit_req = 1;
  54    }
  55}
  56
  57CPUInterruptHandler cpu_interrupt_handler = tcg_handle_interrupt;
  58#endif
  59