1/*
2 * QEMU System Emulator, accelerator interfaces
3 *
4 * Copyright (c) 2003-2008 Fabrice Bellard
5 * Copyright (c) 2014 Red Hat Inc.
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a copy
8 * of this software and associated documentation files (the "Software"), to deal
9 * in the Software without restriction, including without limitation the rights
10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
11 * copies of the Software, and to permit persons to whom the Software is
12 * furnished to do so, subject to the following conditions:
13 *
14 * The above copyright notice and this permission notice shall be included in
15 * all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
23 * THE SOFTWARE.
24 */
25
26#include "qemu/osdep.h"
27#include "sysemu/accel.h"
28#include "sysemu/tcg.h"
29#include "qom/object.h"
30#include "cpu.h"
31#include "sysemu/cpus.h"
32#include "qemu/main-loop.h"
33
34unsigned long tcg_tb_size;
35
36/* mask must never be zero, except for A20 change call */
37static void tcg_handle_interrupt(CPUState *cpu, int mask)
38{
39 int old_mask;
40 g_assert(qemu_mutex_iothread_locked());
41
42 old_mask = cpu->interrupt_request;
43 cpu->interrupt_request |= mask;
44
45 /*
46 * If called from iothread context, wake the target cpu in
47 * case its halted.
48 */
49 if (!qemu_cpu_is_self(cpu)) {
50 qemu_cpu_kick(cpu);
51 } else {
52 atomic_set(&cpu_neg(cpu)->icount_decr.u16.high, -1);
53 if (use_icount &&
54 !cpu->can_do_io
55 && (mask & ~old_mask) != 0) {
56 cpu_abort(cpu, "Raised interrupt while not in I/O function");
57 }
58 }
59}
60
61static int tcg_init(MachineState *ms)
62{
63 tcg_exec_init(tcg_tb_size * 1024 * 1024);
64 cpu_interrupt_handler = tcg_handle_interrupt;
65 return 0;
66}
67
68static void tcg_accel_class_init(ObjectClass *oc, void *data)
69{
70 AccelClass *ac = ACCEL_CLASS(oc);
71 ac->name = "tcg";
72 ac->init_machine = tcg_init;
73 ac->allowed = &tcg_allowed;
74}
75
76#define TYPE_TCG_ACCEL ACCEL_CLASS_NAME("tcg")
77
78static const TypeInfo tcg_accel_type = {
79 .name = TYPE_TCG_ACCEL,
80 .parent = TYPE_ACCEL,
81 .class_init = tcg_accel_class_init,
82};
83
84static void register_accel_types(void)
85{
86 type_register_static(&tcg_accel_type);
87}
88
89type_init(register_accel_types);
90