xref: /qemu/target/i386/tcg/tcg-cpu.c (revision 222f3e6f190c01c764be51ec7e9beb695cd11e1c)
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 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_class_init(CPUClass *cc)
73 {
74     cc->tcg_ops = &x86_tcg_ops;
75 }
76 
77 /*
78  * TCG-specific defaults that override all CPU models when using TCG
79  */
80 static PropValue tcg_default_props[] = {
81     { "vme", "off" },
82     { NULL, NULL },
83 };
84 
85 static void tcg_cpu_instance_init(CPUState *cs)
86 {
87     X86CPU *cpu = X86_CPU(cs);
88     /* Special cases not set in the X86CPUDefinition structs: */
89     x86_cpu_apply_props(cpu, tcg_default_props);
90 }
91 
92 static void tcg_cpu_accel_class_init(ObjectClass *oc, void *data)
93 {
94     AccelCPUClass *acc = ACCEL_CPU_CLASS(oc);
95 
96 #ifndef CONFIG_USER_ONLY
97     acc->cpu_realizefn = tcg_cpu_realizefn;
98 #endif /* CONFIG_USER_ONLY */
99 
100     acc->cpu_class_init = tcg_cpu_class_init;
101     acc->cpu_instance_init = tcg_cpu_instance_init;
102 }
103 static const TypeInfo tcg_cpu_accel_type_info = {
104     .name = ACCEL_CPU_NAME("tcg"),
105 
106     .parent = TYPE_ACCEL_CPU,
107     .class_init = tcg_cpu_accel_class_init,
108     .abstract = true,
109 };
110 static void tcg_cpu_accel_register_types(void)
111 {
112     type_register_static(&tcg_cpu_accel_type_info);
113 }
114 type_init(tcg_cpu_accel_register_types);
115