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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
d8416665 21#include "qemu/osdep.h"
da34e65c 22#include "qapi/error.h"
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23#include "cpu.h"
24#include "qemu-common.h"
087fe4f8 25#include "migration/vmstate.h"
63c91552 26#include "exec/exec-all.h"
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27
28
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29static void m68k_cpu_set_pc(CPUState *cs, vaddr value)
30{
31 M68kCPU *cpu = M68K_CPU(cs);
32
33 cpu->env.pc = value;
34}
35
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36static bool m68k_cpu_has_work(CPUState *cs)
37{
38 return cs->interrupt_request & CPU_INTERRUPT_HARD;
39}
40
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41static void m68k_set_feature(CPUM68KState *env, int feature)
42{
43 env->features |= (1u << feature);
44}
45
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46/* CPUClass::reset() */
47static 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;
f83311e4 52 floatx80 nan = floatx80_default_nan(NULL);
f4a6ce51 53 int i;
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54
55 mcc->parent_reset(s);
56
1f5c00cf 57 memset(env, 0, offsetof(CPUM68KState, end_reset_fields));
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58#if !defined(CONFIG_USER_ONLY)
59 env->sr = 0x2700;
60#endif
61 m68k_switch_sp(env);
f4a6ce51 62 for (i = 0; i < 8; i++) {
f83311e4 63 env->fregs[i].d = nan;
f4a6ce51 64 }
ba624944 65 cpu_m68k_set_fpcr(env, 0);
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66 env->fpsr = 0;
67
620c6cf6 68 cpu_m68k_set_ccr(env, 0);
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69 /* TODO: We should set PC from the interrupt vector. */
70 env->pc = 0;
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71}
72
4d558f5d 73static void m68k_cpu_disas_set_info(CPUState *s, disassemble_info *info)
4f669905 74{
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75 M68kCPU *cpu = M68K_CPU(s);
76 CPUM68KState *env = &cpu->env;
4f669905 77 info->print_insn = print_insn_m68k;
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78 if (m68k_feature(env, M68K_FEATURE_M68000)) {
79 info->mach = bfd_mach_m68040;
80 }
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81}
82
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83/* CPU models */
84
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85static ObjectClass *m68k_cpu_class_by_name(const char *cpu_model)
86{
87 ObjectClass *oc;
7a9f812b 88 char *typename;
bc5b2da3 89
f61797bd 90 typename = g_strdup_printf(M68K_CPU_TYPE_NAME("%s"), cpu_model);
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91 oc = object_class_by_name(typename);
92 g_free(typename);
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93 if (oc != NULL && (object_class_dynamic_cast(oc, TYPE_M68K_CPU) == NULL ||
94 object_class_is_abstract(oc))) {
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95 return NULL;
96 }
97 return oc;
98}
99
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100static void m5206_cpu_initfn(Object *obj)
101{
102 M68kCPU *cpu = M68K_CPU(obj);
103 CPUM68KState *env = &cpu->env;
104
105 m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
106}
107
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108static void m68000_cpu_initfn(Object *obj)
109{
110 M68kCPU *cpu = M68K_CPU(obj);
111 CPUM68KState *env = &cpu->env;
112
113 m68k_set_feature(env, M68K_FEATURE_M68000);
114 m68k_set_feature(env, M68K_FEATURE_USP);
115 m68k_set_feature(env, M68K_FEATURE_WORD_INDEX);
116}
117
118static void m68020_cpu_initfn(Object *obj)
119{
120 M68kCPU *cpu = M68K_CPU(obj);
121 CPUM68KState *env = &cpu->env;
122
123 m68k_set_feature(env, M68K_FEATURE_M68000);
124 m68k_set_feature(env, M68K_FEATURE_USP);
125 m68k_set_feature(env, M68K_FEATURE_WORD_INDEX);
126 m68k_set_feature(env, M68K_FEATURE_QUAD_MULDIV);
127 m68k_set_feature(env, M68K_FEATURE_BRAL);
128 m68k_set_feature(env, M68K_FEATURE_BCCL);
129 m68k_set_feature(env, M68K_FEATURE_BITFIELD);
130 m68k_set_feature(env, M68K_FEATURE_EXT_FULL);
131 m68k_set_feature(env, M68K_FEATURE_SCALED_INDEX);
132 m68k_set_feature(env, M68K_FEATURE_LONG_MULDIV);
133 m68k_set_feature(env, M68K_FEATURE_FPU);
134 m68k_set_feature(env, M68K_FEATURE_CAS);
135 m68k_set_feature(env, M68K_FEATURE_BKPT);
18059c9e 136 m68k_set_feature(env, M68K_FEATURE_RTD);
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137}
138#define m68030_cpu_initfn m68020_cpu_initfn
139#define m68040_cpu_initfn m68020_cpu_initfn
140
141static void m68060_cpu_initfn(Object *obj)
142{
143 M68kCPU *cpu = M68K_CPU(obj);
144 CPUM68KState *env = &cpu->env;
145
146 m68k_set_feature(env, M68K_FEATURE_M68000);
147 m68k_set_feature(env, M68K_FEATURE_USP);
148 m68k_set_feature(env, M68K_FEATURE_WORD_INDEX);
149 m68k_set_feature(env, M68K_FEATURE_BRAL);
150 m68k_set_feature(env, M68K_FEATURE_BCCL);
151 m68k_set_feature(env, M68K_FEATURE_BITFIELD);
152 m68k_set_feature(env, M68K_FEATURE_EXT_FULL);
153 m68k_set_feature(env, M68K_FEATURE_SCALED_INDEX);
154 m68k_set_feature(env, M68K_FEATURE_LONG_MULDIV);
155 m68k_set_feature(env, M68K_FEATURE_FPU);
156 m68k_set_feature(env, M68K_FEATURE_CAS);
157 m68k_set_feature(env, M68K_FEATURE_BKPT);
18059c9e 158 m68k_set_feature(env, M68K_FEATURE_RTD);
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159}
160
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161static void m5208_cpu_initfn(Object *obj)
162{
163 M68kCPU *cpu = M68K_CPU(obj);
164 CPUM68KState *env = &cpu->env;
165
166 m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
167 m68k_set_feature(env, M68K_FEATURE_CF_ISA_APLUSC);
168 m68k_set_feature(env, M68K_FEATURE_BRAL);
169 m68k_set_feature(env, M68K_FEATURE_CF_EMAC);
170 m68k_set_feature(env, M68K_FEATURE_USP);
171}
172
173static void cfv4e_cpu_initfn(Object *obj)
174{
175 M68kCPU *cpu = M68K_CPU(obj);
176 CPUM68KState *env = &cpu->env;
177
178 m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
179 m68k_set_feature(env, M68K_FEATURE_CF_ISA_B);
180 m68k_set_feature(env, M68K_FEATURE_BRAL);
181 m68k_set_feature(env, M68K_FEATURE_CF_FPU);
182 m68k_set_feature(env, M68K_FEATURE_CF_EMAC);
183 m68k_set_feature(env, M68K_FEATURE_USP);
184}
185
186static void any_cpu_initfn(Object *obj)
187{
188 M68kCPU *cpu = M68K_CPU(obj);
189 CPUM68KState *env = &cpu->env;
190
191 m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
192 m68k_set_feature(env, M68K_FEATURE_CF_ISA_B);
193 m68k_set_feature(env, M68K_FEATURE_CF_ISA_APLUSC);
194 m68k_set_feature(env, M68K_FEATURE_BRAL);
195 m68k_set_feature(env, M68K_FEATURE_CF_FPU);
196 /* MAC and EMAC are mututally exclusive, so pick EMAC.
197 It's mostly backwards compatible. */
198 m68k_set_feature(env, M68K_FEATURE_CF_EMAC);
199 m68k_set_feature(env, M68K_FEATURE_CF_EMAC_B);
200 m68k_set_feature(env, M68K_FEATURE_USP);
201 m68k_set_feature(env, M68K_FEATURE_EXT_FULL);
202 m68k_set_feature(env, M68K_FEATURE_WORD_INDEX);
203}
204
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205static void m68k_cpu_realizefn(DeviceState *dev, Error **errp)
206{
14a10fc3 207 CPUState *cs = CPU(dev);
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208 M68kCPU *cpu = M68K_CPU(dev);
209 M68kCPUClass *mcc = M68K_CPU_GET_CLASS(dev);
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210 Error *local_err = NULL;
211
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212 register_m68k_insns(&cpu->env);
213
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214 cpu_exec_realizefn(cs, &local_err);
215 if (local_err != NULL) {
216 error_propagate(errp, local_err);
217 return;
218 }
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219
220 m68k_cpu_init_gdb(cpu);
221
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222 cpu_reset(cs);
223 qemu_init_vcpu(cs);
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224
225 mcc->parent_realize(dev, errp);
226}
227
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228static void m68k_cpu_initfn(Object *obj)
229{
c05efcb1 230 CPUState *cs = CPU(obj);
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231 M68kCPU *cpu = M68K_CPU(obj);
232 CPUM68KState *env = &cpu->env;
233
c05efcb1 234 cs->env_ptr = env;
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235}
236
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237static const VMStateDescription vmstate_m68k_cpu = {
238 .name = "cpu",
239 .unmigratable = 1,
240};
241
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242static void m68k_cpu_class_init(ObjectClass *c, void *data)
243{
244 M68kCPUClass *mcc = M68K_CPU_CLASS(c);
245 CPUClass *cc = CPU_CLASS(c);
087fe4f8 246 DeviceClass *dc = DEVICE_CLASS(c);
b9e7a234 247
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248 mcc->parent_realize = dc->realize;
249 dc->realize = m68k_cpu_realizefn;
250
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251 mcc->parent_reset = cc->reset;
252 cc->reset = m68k_cpu_reset;
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253
254 cc->class_by_name = m68k_cpu_class_by_name;
8c2e1b00 255 cc->has_work = m68k_cpu_has_work;
97a8ea5a 256 cc->do_interrupt = m68k_cpu_do_interrupt;
ab409bb3 257 cc->cpu_exec_interrupt = m68k_cpu_exec_interrupt;
878096ee 258 cc->dump_state = m68k_cpu_dump_state;
e700604d 259 cc->set_pc = m68k_cpu_set_pc;
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260 cc->gdb_read_register = m68k_cpu_gdb_read_register;
261 cc->gdb_write_register = m68k_cpu_gdb_write_register;
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262#ifdef CONFIG_USER_ONLY
263 cc->handle_mmu_fault = m68k_cpu_handle_mmu_fault;
264#else
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265 cc->get_phys_page_debug = m68k_cpu_get_phys_page_debug;
266#endif
4f669905 267 cc->disas_set_info = m68k_cpu_disas_set_info;
55c3ceef 268 cc->tcg_initialize = m68k_tcg_init;
00f3fd63 269
a0e372f0 270 cc->gdb_num_core_regs = 18;
5b24c641 271 cc->gdb_core_xml_file = "cf-core.xml";
4c315c27 272
4f669905 273 dc->vmsd = &vmstate_m68k_cpu;
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274}
275
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276#define DEFINE_M68K_CPU_TYPE(cpu_model, initfn) \
277 { \
278 .name = M68K_CPU_TYPE_NAME(cpu_model), \
279 .instance_init = initfn, \
280 .parent = TYPE_M68K_CPU, \
281 }
11150915 282
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283static const TypeInfo m68k_cpus_type_infos[] = {
284 { /* base class should be registered first */
285 .name = TYPE_M68K_CPU,
286 .parent = TYPE_CPU,
287 .instance_size = sizeof(M68kCPU),
288 .instance_init = m68k_cpu_initfn,
289 .abstract = true,
290 .class_size = sizeof(M68kCPUClass),
291 .class_init = m68k_cpu_class_init,
292 },
293 DEFINE_M68K_CPU_TYPE("m68000", m68000_cpu_initfn),
294 DEFINE_M68K_CPU_TYPE("m68020", m68020_cpu_initfn),
295 DEFINE_M68K_CPU_TYPE("m68030", m68030_cpu_initfn),
296 DEFINE_M68K_CPU_TYPE("m68040", m68040_cpu_initfn),
297 DEFINE_M68K_CPU_TYPE("m68060", m68060_cpu_initfn),
298 DEFINE_M68K_CPU_TYPE("m5206", m5206_cpu_initfn),
299 DEFINE_M68K_CPU_TYPE("m5208", m5208_cpu_initfn),
300 DEFINE_M68K_CPU_TYPE("cfv4e", cfv4e_cpu_initfn),
301 DEFINE_M68K_CPU_TYPE("any", any_cpu_initfn),
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302};
303
f61797bd 304DEFINE_TYPES(m68k_cpus_type_infos)