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