Merge remote-tracking branch 'remotes/jsnow-gitlab/tags/python-pull-request' into...
[qemu.git] / target / i386 / tcg / tcg-cpu.c
1 /*
2 * i386 TCG cpu class initialization
3 *
4 * Copyright (c) 2003 Fabrice Bellard
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 "cpu.h"
22 #include "helper-tcg.h"
23 #include "qemu/accel.h"
24 #include "hw/core/accel-cpu.h"
25
26 #include "tcg-cpu.h"
27
28 /* Frob eflags into and out of the CPU temporary format. */
29
30 static void x86_cpu_exec_enter(CPUState *cs)
31 {
32 X86CPU *cpu = X86_CPU(cs);
33 CPUX86State *env = &cpu->env;
34
35 CC_SRC = env->eflags & (CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C);
36 env->df = 1 - (2 * ((env->eflags >> 10) & 1));
37 CC_OP = CC_OP_EFLAGS;
38 env->eflags &= ~(DF_MASK | CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C);
39 }
40
41 static void x86_cpu_exec_exit(CPUState *cs)
42 {
43 X86CPU *cpu = X86_CPU(cs);
44 CPUX86State *env = &cpu->env;
45
46 env->eflags = cpu_compute_eflags(env);
47 }
48
49 static void x86_cpu_synchronize_from_tb(CPUState *cs,
50 const TranslationBlock *tb)
51 {
52 X86CPU *cpu = X86_CPU(cs);
53
54 cpu->env.eip = tb->pc - tb->cs_base;
55 }
56
57 #include "hw/core/tcg-cpu-ops.h"
58
59 static const struct TCGCPUOps x86_tcg_ops = {
60 .initialize = tcg_x86_init,
61 .synchronize_from_tb = x86_cpu_synchronize_from_tb,
62 .cpu_exec_enter = x86_cpu_exec_enter,
63 .cpu_exec_exit = x86_cpu_exec_exit,
64 .cpu_exec_interrupt = x86_cpu_exec_interrupt,
65 .do_interrupt = x86_cpu_do_interrupt,
66 .tlb_fill = x86_cpu_tlb_fill,
67 #ifndef CONFIG_USER_ONLY
68 .debug_excp_handler = breakpoint_handler,
69 #endif /* !CONFIG_USER_ONLY */
70 };
71
72 static void tcg_cpu_init_ops(AccelCPUClass *accel_cpu, CPUClass *cc)
73 {
74 /* for x86, all cpus use the same set of operations */
75 cc->tcg_ops = &x86_tcg_ops;
76 }
77
78 static void tcg_cpu_class_init(CPUClass *cc)
79 {
80 cc->init_accel_cpu = tcg_cpu_init_ops;
81 }
82
83 /*
84 * TCG-specific defaults that override all CPU models when using TCG
85 */
86 static PropValue tcg_default_props[] = {
87 { "vme", "off" },
88 { NULL, NULL },
89 };
90
91 static void tcg_cpu_instance_init(CPUState *cs)
92 {
93 X86CPU *cpu = X86_CPU(cs);
94 /* Special cases not set in the X86CPUDefinition structs: */
95 x86_cpu_apply_props(cpu, tcg_default_props);
96 }
97
98 static void tcg_cpu_accel_class_init(ObjectClass *oc, void *data)
99 {
100 AccelCPUClass *acc = ACCEL_CPU_CLASS(oc);
101
102 #ifndef CONFIG_USER_ONLY
103 acc->cpu_realizefn = tcg_cpu_realizefn;
104 #endif /* CONFIG_USER_ONLY */
105
106 acc->cpu_class_init = tcg_cpu_class_init;
107 acc->cpu_instance_init = tcg_cpu_instance_init;
108 }
109 static const TypeInfo tcg_cpu_accel_type_info = {
110 .name = ACCEL_CPU_NAME("tcg"),
111
112 .parent = TYPE_ACCEL_CPU,
113 .class_init = tcg_cpu_accel_class_init,
114 .abstract = true,
115 };
116 static void tcg_cpu_accel_register_types(void)
117 {
118 type_register_static(&tcg_cpu_accel_type_info);
119 }
120 type_init(tcg_cpu_accel_register_types);