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1 | /* | |
2 | * QEMU Motorola 68k CPU | |
3 | * | |
4 | * Copyright (c) 2012 SUSE LINUX Products GmbH | |
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 2.1 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 | |
18 | * <http://www.gnu.org/licenses/lgpl-2.1.html> | |
19 | */ | |
20 | ||
21 | #include "cpu.h" | |
22 | #include "qemu-common.h" | |
23 | #include "migration/vmstate.h" | |
24 | ||
25 | ||
26 | static void m68k_set_feature(CPUM68KState *env, int feature) | |
27 | { | |
28 | env->features |= (1u << feature); | |
29 | } | |
30 | ||
31 | /* CPUClass::reset() */ | |
32 | static void m68k_cpu_reset(CPUState *s) | |
33 | { | |
34 | M68kCPU *cpu = M68K_CPU(s); | |
35 | M68kCPUClass *mcc = M68K_CPU_GET_CLASS(cpu); | |
36 | CPUM68KState *env = &cpu->env; | |
37 | ||
38 | if (qemu_loglevel_mask(CPU_LOG_RESET)) { | |
39 | qemu_log("CPU Reset (CPU %d)\n", s->cpu_index); | |
40 | log_cpu_state(env, 0); | |
41 | } | |
42 | ||
43 | mcc->parent_reset(s); | |
44 | ||
45 | memset(env, 0, offsetof(CPUM68KState, breakpoints)); | |
46 | #if !defined(CONFIG_USER_ONLY) | |
47 | env->sr = 0x2700; | |
48 | #endif | |
49 | m68k_switch_sp(env); | |
50 | /* ??? FP regs should be initialized to NaN. */ | |
51 | env->cc_op = CC_OP_FLAGS; | |
52 | /* TODO: We should set PC from the interrupt vector. */ | |
53 | env->pc = 0; | |
54 | tlb_flush(env, 1); | |
55 | } | |
56 | ||
57 | /* CPU models */ | |
58 | ||
59 | static ObjectClass *m68k_cpu_class_by_name(const char *cpu_model) | |
60 | { | |
61 | ObjectClass *oc; | |
62 | char *typename; | |
63 | ||
64 | if (cpu_model == NULL) { | |
65 | return NULL; | |
66 | } | |
67 | ||
68 | typename = g_strdup_printf("%s-" TYPE_M68K_CPU, cpu_model); | |
69 | oc = object_class_by_name(typename); | |
70 | g_free(typename); | |
71 | if (oc != NULL && (object_class_dynamic_cast(oc, TYPE_M68K_CPU) == NULL || | |
72 | object_class_is_abstract(oc))) { | |
73 | return NULL; | |
74 | } | |
75 | return oc; | |
76 | } | |
77 | ||
78 | static void m5206_cpu_initfn(Object *obj) | |
79 | { | |
80 | M68kCPU *cpu = M68K_CPU(obj); | |
81 | CPUM68KState *env = &cpu->env; | |
82 | ||
83 | m68k_set_feature(env, M68K_FEATURE_CF_ISA_A); | |
84 | } | |
85 | ||
86 | static void m5208_cpu_initfn(Object *obj) | |
87 | { | |
88 | M68kCPU *cpu = M68K_CPU(obj); | |
89 | CPUM68KState *env = &cpu->env; | |
90 | ||
91 | m68k_set_feature(env, M68K_FEATURE_CF_ISA_A); | |
92 | m68k_set_feature(env, M68K_FEATURE_CF_ISA_APLUSC); | |
93 | m68k_set_feature(env, M68K_FEATURE_BRAL); | |
94 | m68k_set_feature(env, M68K_FEATURE_CF_EMAC); | |
95 | m68k_set_feature(env, M68K_FEATURE_USP); | |
96 | } | |
97 | ||
98 | static void cfv4e_cpu_initfn(Object *obj) | |
99 | { | |
100 | M68kCPU *cpu = M68K_CPU(obj); | |
101 | CPUM68KState *env = &cpu->env; | |
102 | ||
103 | m68k_set_feature(env, M68K_FEATURE_CF_ISA_A); | |
104 | m68k_set_feature(env, M68K_FEATURE_CF_ISA_B); | |
105 | m68k_set_feature(env, M68K_FEATURE_BRAL); | |
106 | m68k_set_feature(env, M68K_FEATURE_CF_FPU); | |
107 | m68k_set_feature(env, M68K_FEATURE_CF_EMAC); | |
108 | m68k_set_feature(env, M68K_FEATURE_USP); | |
109 | } | |
110 | ||
111 | static void any_cpu_initfn(Object *obj) | |
112 | { | |
113 | M68kCPU *cpu = M68K_CPU(obj); | |
114 | CPUM68KState *env = &cpu->env; | |
115 | ||
116 | m68k_set_feature(env, M68K_FEATURE_CF_ISA_A); | |
117 | m68k_set_feature(env, M68K_FEATURE_CF_ISA_B); | |
118 | m68k_set_feature(env, M68K_FEATURE_CF_ISA_APLUSC); | |
119 | m68k_set_feature(env, M68K_FEATURE_BRAL); | |
120 | m68k_set_feature(env, M68K_FEATURE_CF_FPU); | |
121 | /* MAC and EMAC are mututally exclusive, so pick EMAC. | |
122 | It's mostly backwards compatible. */ | |
123 | m68k_set_feature(env, M68K_FEATURE_CF_EMAC); | |
124 | m68k_set_feature(env, M68K_FEATURE_CF_EMAC_B); | |
125 | m68k_set_feature(env, M68K_FEATURE_USP); | |
126 | m68k_set_feature(env, M68K_FEATURE_EXT_FULL); | |
127 | m68k_set_feature(env, M68K_FEATURE_WORD_INDEX); | |
128 | } | |
129 | ||
130 | typedef struct M68kCPUInfo { | |
131 | const char *name; | |
132 | void (*instance_init)(Object *obj); | |
133 | } M68kCPUInfo; | |
134 | ||
135 | static const M68kCPUInfo m68k_cpus[] = { | |
136 | { .name = "m5206", .instance_init = m5206_cpu_initfn }, | |
137 | { .name = "m5208", .instance_init = m5208_cpu_initfn }, | |
138 | { .name = "cfv4e", .instance_init = cfv4e_cpu_initfn }, | |
139 | { .name = "any", .instance_init = any_cpu_initfn }, | |
140 | }; | |
141 | ||
142 | static void m68k_cpu_realizefn(DeviceState *dev, Error **errp) | |
143 | { | |
144 | M68kCPU *cpu = M68K_CPU(dev); | |
145 | M68kCPUClass *mcc = M68K_CPU_GET_CLASS(dev); | |
146 | ||
147 | m68k_cpu_init_gdb(cpu); | |
148 | ||
149 | cpu_reset(CPU(cpu)); | |
150 | qemu_init_vcpu(&cpu->env); | |
151 | ||
152 | mcc->parent_realize(dev, errp); | |
153 | } | |
154 | ||
155 | static void m68k_cpu_initfn(Object *obj) | |
156 | { | |
157 | CPUState *cs = CPU(obj); | |
158 | M68kCPU *cpu = M68K_CPU(obj); | |
159 | CPUM68KState *env = &cpu->env; | |
160 | static bool inited; | |
161 | ||
162 | cs->env_ptr = env; | |
163 | cpu_exec_init(env); | |
164 | ||
165 | if (tcg_enabled() && !inited) { | |
166 | inited = true; | |
167 | m68k_tcg_init(); | |
168 | } | |
169 | } | |
170 | ||
171 | static const VMStateDescription vmstate_m68k_cpu = { | |
172 | .name = "cpu", | |
173 | .unmigratable = 1, | |
174 | }; | |
175 | ||
176 | static void m68k_cpu_class_init(ObjectClass *c, void *data) | |
177 | { | |
178 | M68kCPUClass *mcc = M68K_CPU_CLASS(c); | |
179 | CPUClass *cc = CPU_CLASS(c); | |
180 | DeviceClass *dc = DEVICE_CLASS(c); | |
181 | ||
182 | mcc->parent_realize = dc->realize; | |
183 | dc->realize = m68k_cpu_realizefn; | |
184 | ||
185 | mcc->parent_reset = cc->reset; | |
186 | cc->reset = m68k_cpu_reset; | |
187 | ||
188 | cc->class_by_name = m68k_cpu_class_by_name; | |
189 | cc->do_interrupt = m68k_cpu_do_interrupt; | |
190 | dc->vmsd = &vmstate_m68k_cpu; | |
191 | } | |
192 | ||
193 | static void register_cpu_type(const M68kCPUInfo *info) | |
194 | { | |
195 | TypeInfo type_info = { | |
196 | .parent = TYPE_M68K_CPU, | |
197 | .instance_init = info->instance_init, | |
198 | }; | |
199 | ||
200 | type_info.name = g_strdup_printf("%s-" TYPE_M68K_CPU, info->name); | |
201 | type_register(&type_info); | |
202 | g_free((void *)type_info.name); | |
203 | } | |
204 | ||
205 | static const TypeInfo m68k_cpu_type_info = { | |
206 | .name = TYPE_M68K_CPU, | |
207 | .parent = TYPE_CPU, | |
208 | .instance_size = sizeof(M68kCPU), | |
209 | .instance_init = m68k_cpu_initfn, | |
210 | .abstract = true, | |
211 | .class_size = sizeof(M68kCPUClass), | |
212 | .class_init = m68k_cpu_class_init, | |
213 | }; | |
214 | ||
215 | static void m68k_cpu_register_types(void) | |
216 | { | |
217 | int i; | |
218 | ||
219 | type_register_static(&m68k_cpu_type_info); | |
220 | for (i = 0; i < ARRAY_SIZE(m68k_cpus); i++) { | |
221 | register_cpu_type(&m68k_cpus[i]); | |
222 | } | |
223 | } | |
224 | ||
225 | type_init(m68k_cpu_register_types) |