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1 /*
2  *  TriCore emulation for qemu: main translation routines.
3  *
4  *  Copyright (c) 2012-2014 Bastian Koppelmann C-Lab/University Paderborn
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 "cpu.h"
21 #include "qemu-common.h"
22
23 static inline void set_feature(CPUTriCoreState *env, int feature)
24 {
25     env->features |= 1ULL << feature;
26 }
27
28 static void tricore_cpu_set_pc(CPUState *cs, vaddr value)
29 {
30     TriCoreCPU *cpu = TRICORE_CPU(cs);
31     CPUTriCoreState *env = &cpu->env;
32
33     env->PC = value & ~(target_ulong)1;
34 }
35
36 static void tricore_cpu_synchronize_from_tb(CPUState *cs,
37                                             TranslationBlock *tb)
38 {
39     TriCoreCPU *cpu = TRICORE_CPU(cs);
40     CPUTriCoreState *env = &cpu->env;
41
42     env->PC = tb->pc;
43 }
44
45 static void tricore_cpu_reset(CPUState *s)
46 {
47     TriCoreCPU *cpu = TRICORE_CPU(s);
48     TriCoreCPUClass *tcc = TRICORE_CPU_GET_CLASS(cpu);
49     CPUTriCoreState *env = &cpu->env;
50
51     tcc->parent_reset(s);
52
53     tlb_flush(s, 1);
54
55     cpu_state_reset(env);
56 }
57
58 static bool tricore_cpu_has_work(CPUState *cs)
59 {
60     return true;
61 }
62
63 static void tricore_cpu_realizefn(DeviceState *dev, Error **errp)
64 {
65     CPUState *cs = CPU(dev);
66     TriCoreCPUClass *tcc = TRICORE_CPU_GET_CLASS(dev);
67
68     cpu_reset(cs);
69     qemu_init_vcpu(cs);
70
71     tcc->parent_realize(dev, errp);
72 }
73
74
75 static void tricore_cpu_initfn(Object *obj)
76 {
77     CPUState *cs = CPU(obj);
78     TriCoreCPU *cpu = TRICORE_CPU(obj);
79     CPUTriCoreState *env = &cpu->env;
80
81     cs->env_ptr = env;
82     cpu_exec_init(env);
83
84     if (tcg_enabled()) {
85         tricore_tcg_init();
86     }
87 }
88
89 static ObjectClass *tricore_cpu_class_by_name(const char *cpu_model)
90 {
91     ObjectClass *oc;
92     char *typename;
93
94     if (!cpu_model) {
95         return NULL;
96     }
97
98     typename = g_strdup_printf("%s-" TYPE_TRICORE_CPU, cpu_model);
99     oc = object_class_by_name(typename);
100     g_free(typename);
101     if (!oc || !object_class_dynamic_cast(oc, TYPE_TRICORE_CPU) ||
102         object_class_is_abstract(oc)) {
103         return NULL;
104     }
105     return oc;
106 }
107
108 static void tc1796_initfn(Object *obj)
109 {
110     TriCoreCPU *cpu = TRICORE_CPU(obj);
111
112     set_feature(&cpu->env, TRICORE_FEATURE_13);
113 }
114
115 static void aurix_initfn(Object *obj)
116 {
117     TriCoreCPU *cpu = TRICORE_CPU(obj);
118
119     set_feature(&cpu->env, TRICORE_FEATURE_16);
120 }
121
122 typedef struct TriCoreCPUInfo {
123     const char *name;
124     void (*initfn)(Object *obj);
125     void (*class_init)(ObjectClass *oc, void *data);
126 } TriCoreCPUInfo;
127
128 static const TriCoreCPUInfo tricore_cpus[] = {
129     { .name = "tc1796",      .initfn = tc1796_initfn },
130     { .name = "aurix",       .initfn = aurix_initfn },
131     { .name = NULL }
132 };
133
134 static void tricore_cpu_class_init(ObjectClass *c, void *data)
135 {
136     TriCoreCPUClass *mcc = TRICORE_CPU_CLASS(c);
137     CPUClass *cc = CPU_CLASS(c);
138     DeviceClass *dc = DEVICE_CLASS(c);
139
140     mcc->parent_realize = dc->realize;
141     dc->realize = tricore_cpu_realizefn;
142
143     mcc->parent_reset = cc->reset;
144     cc->reset = tricore_cpu_reset;
145     cc->class_by_name = tricore_cpu_class_by_name;
146     cc->has_work = tricore_cpu_has_work;
147
148     cc->dump_state = tricore_cpu_dump_state;
149     cc->set_pc = tricore_cpu_set_pc;
150     cc->synchronize_from_tb = tricore_cpu_synchronize_from_tb;
151
152 }
153
154 static void cpu_register(const TriCoreCPUInfo *info)
155 {
156     TypeInfo type_info = {
157         .parent = TYPE_TRICORE_CPU,
158         .instance_size = sizeof(TriCoreCPU),
159         .instance_init = info->initfn,
160         .class_size = sizeof(TriCoreCPUClass),
161         .class_init = info->class_init,
162     };
163
164     type_info.name = g_strdup_printf("%s-" TYPE_TRICORE_CPU, info->name);
165     type_register(&type_info);
166     g_free((void *)type_info.name);
167 }
168
169 static const TypeInfo tricore_cpu_type_info = {
170     .name = TYPE_TRICORE_CPU,
171     .parent = TYPE_CPU,
172     .instance_size = sizeof(TriCoreCPU),
173     .instance_init = tricore_cpu_initfn,
174     .abstract = true,
175     .class_size = sizeof(TriCoreCPUClass),
176     .class_init = tricore_cpu_class_init,
177 };
178
179 static void tricore_cpu_register_types(void)
180 {
181     const TriCoreCPUInfo *info = tricore_cpus;
182
183     type_register_static(&tricore_cpu_type_info);
184
185     while (info->name) {
186         cpu_register(info);
187         info++;
188     }
189 }
190
191 type_init(tricore_cpu_register_types)
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