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 #include "qemu/main-loop.h"
  25
  26 uintptr_t qemu_real_host_page_size;
  27 intptr_t qemu_real_host_page_mask;
  28
  29 #ifndef CONFIG_USER_ONLY
  30 /* mask must never be zero, except for A20 change call */
  31 static void tcg_handle_interrupt(CPUState *cpu, int mask)
  32 {
  33     int old_mask;
  34     g_assert(qemu_mutex_iothread_locked());
  35
  36     old_mask = cpu->interrupt_request;
  37     cpu->interrupt_request |= mask;
  38
  39     /*
  40      * If called from iothread context, wake the target cpu in
  41      * case its halted.
  42      */
  43     if (!qemu_cpu_is_self(cpu)) {
  44         qemu_cpu_kick(cpu);
  45     } else {
  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 }
  57
  58 CPUInterruptHandler cpu_interrupt_handler = tcg_handle_interrupt;
  59 #endif