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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 "qemu/osdep.h"
22 #include "qapi/error.h"
23 #include "cpu.h"
24 #include "qemu-common.h"
25 #include "migration/vmstate.h"
26 #include "exec/exec-all.h"
27
28
29 static void m68k_cpu_set_pc(CPUState *cs, vaddr value)
30 {
31 M68kCPU *cpu = M68K_CPU(cs);
32
33 cpu->env.pc = value;
34 }
35
36 static bool m68k_cpu_has_work(CPUState *cs)
37 {
38 return cs->interrupt_request & CPU_INTERRUPT_HARD;
39 }
40
41 static void m68k_set_feature(CPUM68KState *env, int feature)
42 {
43 env->features |= (1u << feature);
44 }
45
46 /* CPUClass::reset() */
47 static void m68k_cpu_reset(CPUState *s)
48 {
49 M68kCPU *cpu = M68K_CPU(s);
50 M68kCPUClass *mcc = M68K_CPU_GET_CLASS(cpu);
51 CPUM68KState *env = &cpu->env;
52
53 mcc->parent_reset(s);
54
55 memset(env, 0, offsetof(CPUM68KState, features));
56 #if !defined(CONFIG_USER_ONLY)
57 env->sr = 0x2700;
58 #endif
59 m68k_switch_sp(env);
60 /* ??? FP regs should be initialized to NaN. */
61 cpu_m68k_set_ccr(env, 0);
62 /* TODO: We should set PC from the interrupt vector. */
63 env->pc = 0;
64 tlb_flush(s, 1);
65 }
66
67 static void m68k_cpu_disas_set_info(CPUState *s, disassemble_info *info)
68 {
69 M68kCPU *cpu = M68K_CPU(s);
70 CPUM68KState *env = &cpu->env;
71 info->print_insn = print_insn_m68k;
72 if (m68k_feature(env, M68K_FEATURE_M68000)) {
73 info->mach = bfd_mach_m68040;
74 }
75 }
76
77 /* CPU models */
78
79 static ObjectClass *m68k_cpu_class_by_name(const char *cpu_model)
80 {
81 ObjectClass *oc;
82 char *typename;
83
84 if (cpu_model == NULL) {
85 return NULL;
86 }
87
88 typename = g_strdup_printf("%s-" TYPE_M68K_CPU, cpu_model);
89 oc = object_class_by_name(typename);
90 g_free(typename);
91 if (oc != NULL && (object_class_dynamic_cast(oc, TYPE_M68K_CPU) == NULL ||
92 object_class_is_abstract(oc))) {
93 return NULL;
94 }
95 return oc;
96 }
97
98 static void m5206_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 }
105
106 static void m68000_cpu_initfn(Object *obj)
107 {
108 M68kCPU *cpu = M68K_CPU(obj);
109 CPUM68KState *env = &cpu->env;
110
111 m68k_set_feature(env, M68K_FEATURE_M68000);
112 m68k_set_feature(env, M68K_FEATURE_USP);
113 m68k_set_feature(env, M68K_FEATURE_WORD_INDEX);
114 }
115
116 static void m68020_cpu_initfn(Object *obj)
117 {
118 M68kCPU *cpu = M68K_CPU(obj);
119 CPUM68KState *env = &cpu->env;
120
121 m68k_set_feature(env, M68K_FEATURE_M68000);
122 m68k_set_feature(env, M68K_FEATURE_USP);
123 m68k_set_feature(env, M68K_FEATURE_WORD_INDEX);
124 m68k_set_feature(env, M68K_FEATURE_QUAD_MULDIV);
125 m68k_set_feature(env, M68K_FEATURE_BRAL);
126 m68k_set_feature(env, M68K_FEATURE_BCCL);
127 m68k_set_feature(env, M68K_FEATURE_BITFIELD);
128 m68k_set_feature(env, M68K_FEATURE_EXT_FULL);
129 m68k_set_feature(env, M68K_FEATURE_SCALED_INDEX);
130 m68k_set_feature(env, M68K_FEATURE_LONG_MULDIV);
131 m68k_set_feature(env, M68K_FEATURE_FPU);
132 m68k_set_feature(env, M68K_FEATURE_CAS);
133 m68k_set_feature(env, M68K_FEATURE_BKPT);
134 }
135 #define m68030_cpu_initfn m68020_cpu_initfn
136 #define m68040_cpu_initfn m68020_cpu_initfn
137
138 static void m68060_cpu_initfn(Object *obj)
139 {
140 M68kCPU *cpu = M68K_CPU(obj);
141 CPUM68KState *env = &cpu->env;
142
143 m68k_set_feature(env, M68K_FEATURE_M68000);
144 m68k_set_feature(env, M68K_FEATURE_USP);
145 m68k_set_feature(env, M68K_FEATURE_WORD_INDEX);
146 m68k_set_feature(env, M68K_FEATURE_BRAL);
147 m68k_set_feature(env, M68K_FEATURE_BCCL);
148 m68k_set_feature(env, M68K_FEATURE_BITFIELD);
149 m68k_set_feature(env, M68K_FEATURE_EXT_FULL);
150 m68k_set_feature(env, M68K_FEATURE_SCALED_INDEX);
151 m68k_set_feature(env, M68K_FEATURE_LONG_MULDIV);
152 m68k_set_feature(env, M68K_FEATURE_FPU);
153 m68k_set_feature(env, M68K_FEATURE_CAS);
154 m68k_set_feature(env, M68K_FEATURE_BKPT);
155 }
156
157 static void m5208_cpu_initfn(Object *obj)
158 {
159 M68kCPU *cpu = M68K_CPU(obj);
160 CPUM68KState *env = &cpu->env;
161
162 m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
163 m68k_set_feature(env, M68K_FEATURE_CF_ISA_APLUSC);
164 m68k_set_feature(env, M68K_FEATURE_BRAL);
165 m68k_set_feature(env, M68K_FEATURE_CF_EMAC);
166 m68k_set_feature(env, M68K_FEATURE_USP);
167 }
168
169 static void cfv4e_cpu_initfn(Object *obj)
170 {
171 M68kCPU *cpu = M68K_CPU(obj);
172 CPUM68KState *env = &cpu->env;
173
174 m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
175 m68k_set_feature(env, M68K_FEATURE_CF_ISA_B);
176 m68k_set_feature(env, M68K_FEATURE_BRAL);
177 m68k_set_feature(env, M68K_FEATURE_CF_FPU);
178 m68k_set_feature(env, M68K_FEATURE_CF_EMAC);
179 m68k_set_feature(env, M68K_FEATURE_USP);
180 }
181
182 static void any_cpu_initfn(Object *obj)
183 {
184 M68kCPU *cpu = M68K_CPU(obj);
185 CPUM68KState *env = &cpu->env;
186
187 m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
188 m68k_set_feature(env, M68K_FEATURE_CF_ISA_B);
189 m68k_set_feature(env, M68K_FEATURE_CF_ISA_APLUSC);
190 m68k_set_feature(env, M68K_FEATURE_BRAL);
191 m68k_set_feature(env, M68K_FEATURE_CF_FPU);
192 /* MAC and EMAC are mututally exclusive, so pick EMAC.
193 It's mostly backwards compatible. */
194 m68k_set_feature(env, M68K_FEATURE_CF_EMAC);
195 m68k_set_feature(env, M68K_FEATURE_CF_EMAC_B);
196 m68k_set_feature(env, M68K_FEATURE_USP);
197 m68k_set_feature(env, M68K_FEATURE_EXT_FULL);
198 m68k_set_feature(env, M68K_FEATURE_WORD_INDEX);
199 }
200
201 typedef struct M68kCPUInfo {
202 const char *name;
203 void (*instance_init)(Object *obj);
204 } M68kCPUInfo;
205
206 static const M68kCPUInfo m68k_cpus[] = {
207 { .name = "m68000", .instance_init = m68000_cpu_initfn },
208 { .name = "m68020", .instance_init = m68020_cpu_initfn },
209 { .name = "m68030", .instance_init = m68030_cpu_initfn },
210 { .name = "m68040", .instance_init = m68040_cpu_initfn },
211 { .name = "m68060", .instance_init = m68060_cpu_initfn },
212 { .name = "m5206", .instance_init = m5206_cpu_initfn },
213 { .name = "m5208", .instance_init = m5208_cpu_initfn },
214 { .name = "cfv4e", .instance_init = cfv4e_cpu_initfn },
215 { .name = "any", .instance_init = any_cpu_initfn },
216 };
217
218 static void m68k_cpu_realizefn(DeviceState *dev, Error **errp)
219 {
220 CPUState *cs = CPU(dev);
221 M68kCPU *cpu = M68K_CPU(dev);
222 M68kCPUClass *mcc = M68K_CPU_GET_CLASS(dev);
223 Error *local_err = NULL;
224
225 cpu_exec_realizefn(cs, &local_err);
226 if (local_err != NULL) {
227 error_propagate(errp, local_err);
228 return;
229 }
230
231 m68k_cpu_init_gdb(cpu);
232
233 cpu_reset(cs);
234 qemu_init_vcpu(cs);
235
236 mcc->parent_realize(dev, errp);
237 }
238
239 static void m68k_cpu_initfn(Object *obj)
240 {
241 CPUState *cs = CPU(obj);
242 M68kCPU *cpu = M68K_CPU(obj);
243 CPUM68KState *env = &cpu->env;
244 static bool inited;
245
246 cs->env_ptr = env;
247
248 if (tcg_enabled() && !inited) {
249 inited = true;
250 m68k_tcg_init();
251 }
252 }
253
254 static const VMStateDescription vmstate_m68k_cpu = {
255 .name = "cpu",
256 .unmigratable = 1,
257 };
258
259 static void m68k_cpu_class_init(ObjectClass *c, void *data)
260 {
261 M68kCPUClass *mcc = M68K_CPU_CLASS(c);
262 CPUClass *cc = CPU_CLASS(c);
263 DeviceClass *dc = DEVICE_CLASS(c);
264
265 mcc->parent_realize = dc->realize;
266 dc->realize = m68k_cpu_realizefn;
267
268 mcc->parent_reset = cc->reset;
269 cc->reset = m68k_cpu_reset;
270
271 cc->class_by_name = m68k_cpu_class_by_name;
272 cc->has_work = m68k_cpu_has_work;
273 cc->do_interrupt = m68k_cpu_do_interrupt;
274 cc->cpu_exec_interrupt = m68k_cpu_exec_interrupt;
275 cc->dump_state = m68k_cpu_dump_state;
276 cc->set_pc = m68k_cpu_set_pc;
277 cc->gdb_read_register = m68k_cpu_gdb_read_register;
278 cc->gdb_write_register = m68k_cpu_gdb_write_register;
279 #ifdef CONFIG_USER_ONLY
280 cc->handle_mmu_fault = m68k_cpu_handle_mmu_fault;
281 #else
282 cc->get_phys_page_debug = m68k_cpu_get_phys_page_debug;
283 #endif
284 cc->disas_set_info = m68k_cpu_disas_set_info;
285
286 cc->gdb_num_core_regs = 18;
287 cc->gdb_core_xml_file = "cf-core.xml";
288
289 dc->vmsd = &vmstate_m68k_cpu;
290 }
291
292 static void register_cpu_type(const M68kCPUInfo *info)
293 {
294 TypeInfo type_info = {
295 .parent = TYPE_M68K_CPU,
296 .instance_init = info->instance_init,
297 };
298
299 type_info.name = g_strdup_printf("%s-" TYPE_M68K_CPU, info->name);
300 type_register(&type_info);
301 g_free((void *)type_info.name);
302 }
303
304 static const TypeInfo m68k_cpu_type_info = {
305 .name = TYPE_M68K_CPU,
306 .parent = TYPE_CPU,
307 .instance_size = sizeof(M68kCPU),
308 .instance_init = m68k_cpu_initfn,
309 .abstract = true,
310 .class_size = sizeof(M68kCPUClass),
311 .class_init = m68k_cpu_class_init,
312 };
313
314 static void m68k_cpu_register_types(void)
315 {
316 int i;
317
318 type_register_static(&m68k_cpu_type_info);
319 for (i = 0; i < ARRAY_SIZE(m68k_cpus); i++) {
320 register_cpu_type(&m68k_cpus[i]);
321 }
322 }
323
324 type_init(m68k_cpu_register_types)