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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_cpu_set_pc(CPUState *cs, vaddr value) | |
27 | { | |
28 | M68kCPU *cpu = M68K_CPU(cs); | |
29 | ||
30 | cpu->env.pc = value; | |
31 | } | |
32 | ||
33 | static void m68k_set_feature(CPUM68KState *env, int feature) | |
34 | { | |
35 | env->features |= (1u << feature); | |
36 | } | |
37 | ||
38 | /* CPUClass::reset() */ | |
39 | static void m68k_cpu_reset(CPUState *s) | |
40 | { | |
41 | M68kCPU *cpu = M68K_CPU(s); | |
42 | M68kCPUClass *mcc = M68K_CPU_GET_CLASS(cpu); | |
43 | CPUM68KState *env = &cpu->env; | |
44 | ||
45 | mcc->parent_reset(s); | |
46 | ||
47 | memset(env, 0, offsetof(CPUM68KState, breakpoints)); | |
48 | #if !defined(CONFIG_USER_ONLY) | |
49 | env->sr = 0x2700; | |
50 | #endif | |
51 | m68k_switch_sp(env); | |
52 | /* ??? FP regs should be initialized to NaN. */ | |
53 | env->cc_op = CC_OP_FLAGS; | |
54 | /* TODO: We should set PC from the interrupt vector. */ | |
55 | env->pc = 0; | |
56 | tlb_flush(env, 1); | |
57 | } | |
58 | ||
59 | /* CPU models */ | |
60 | ||
61 | static ObjectClass *m68k_cpu_class_by_name(const char *cpu_model) | |
62 | { | |
63 | ObjectClass *oc; | |
64 | char *typename; | |
65 | ||
66 | if (cpu_model == NULL) { | |
67 | return NULL; | |
68 | } | |
69 | ||
70 | typename = g_strdup_printf("%s-" TYPE_M68K_CPU, cpu_model); | |
71 | oc = object_class_by_name(typename); | |
72 | g_free(typename); | |
73 | if (oc != NULL && (object_class_dynamic_cast(oc, TYPE_M68K_CPU) == NULL || | |
74 | object_class_is_abstract(oc))) { | |
75 | return NULL; | |
76 | } | |
77 | return oc; | |
78 | } | |
79 | ||
80 | static void m5206_cpu_initfn(Object *obj) | |
81 | { | |
82 | M68kCPU *cpu = M68K_CPU(obj); | |
83 | CPUM68KState *env = &cpu->env; | |
84 | ||
85 | m68k_set_feature(env, M68K_FEATURE_CF_ISA_A); | |
86 | } | |
87 | ||
88 | static void m5208_cpu_initfn(Object *obj) | |
89 | { | |
90 | M68kCPU *cpu = M68K_CPU(obj); | |
91 | CPUM68KState *env = &cpu->env; | |
92 | ||
93 | m68k_set_feature(env, M68K_FEATURE_CF_ISA_A); | |
94 | m68k_set_feature(env, M68K_FEATURE_CF_ISA_APLUSC); | |
95 | m68k_set_feature(env, M68K_FEATURE_BRAL); | |
96 | m68k_set_feature(env, M68K_FEATURE_CF_EMAC); | |
97 | m68k_set_feature(env, M68K_FEATURE_USP); | |
98 | } | |
99 | ||
100 | static void cfv4e_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 | m68k_set_feature(env, M68K_FEATURE_CF_ISA_B); | |
107 | m68k_set_feature(env, M68K_FEATURE_BRAL); | |
108 | m68k_set_feature(env, M68K_FEATURE_CF_FPU); | |
109 | m68k_set_feature(env, M68K_FEATURE_CF_EMAC); | |
110 | m68k_set_feature(env, M68K_FEATURE_USP); | |
111 | } | |
112 | ||
113 | static void any_cpu_initfn(Object *obj) | |
114 | { | |
115 | M68kCPU *cpu = M68K_CPU(obj); | |
116 | CPUM68KState *env = &cpu->env; | |
117 | ||
118 | m68k_set_feature(env, M68K_FEATURE_CF_ISA_A); | |
119 | m68k_set_feature(env, M68K_FEATURE_CF_ISA_B); | |
120 | m68k_set_feature(env, M68K_FEATURE_CF_ISA_APLUSC); | |
121 | m68k_set_feature(env, M68K_FEATURE_BRAL); | |
122 | m68k_set_feature(env, M68K_FEATURE_CF_FPU); | |
123 | /* MAC and EMAC are mututally exclusive, so pick EMAC. | |
124 | It's mostly backwards compatible. */ | |
125 | m68k_set_feature(env, M68K_FEATURE_CF_EMAC); | |
126 | m68k_set_feature(env, M68K_FEATURE_CF_EMAC_B); | |
127 | m68k_set_feature(env, M68K_FEATURE_USP); | |
128 | m68k_set_feature(env, M68K_FEATURE_EXT_FULL); | |
129 | m68k_set_feature(env, M68K_FEATURE_WORD_INDEX); | |
130 | } | |
131 | ||
132 | typedef struct M68kCPUInfo { | |
133 | const char *name; | |
134 | void (*instance_init)(Object *obj); | |
135 | } M68kCPUInfo; | |
136 | ||
137 | static const M68kCPUInfo m68k_cpus[] = { | |
138 | { .name = "m5206", .instance_init = m5206_cpu_initfn }, | |
139 | { .name = "m5208", .instance_init = m5208_cpu_initfn }, | |
140 | { .name = "cfv4e", .instance_init = cfv4e_cpu_initfn }, | |
141 | { .name = "any", .instance_init = any_cpu_initfn }, | |
142 | }; | |
143 | ||
144 | static void m68k_cpu_realizefn(DeviceState *dev, Error **errp) | |
145 | { | |
146 | CPUState *cs = CPU(dev); | |
147 | M68kCPU *cpu = M68K_CPU(dev); | |
148 | M68kCPUClass *mcc = M68K_CPU_GET_CLASS(dev); | |
149 | ||
150 | m68k_cpu_init_gdb(cpu); | |
151 | ||
152 | cpu_reset(cs); | |
153 | qemu_init_vcpu(cs); | |
154 | ||
155 | mcc->parent_realize(dev, errp); | |
156 | } | |
157 | ||
158 | static void m68k_cpu_initfn(Object *obj) | |
159 | { | |
160 | CPUState *cs = CPU(obj); | |
161 | M68kCPU *cpu = M68K_CPU(obj); | |
162 | CPUM68KState *env = &cpu->env; | |
163 | static bool inited; | |
164 | ||
165 | cs->env_ptr = env; | |
166 | cpu_exec_init(env); | |
167 | ||
168 | if (tcg_enabled() && !inited) { | |
169 | inited = true; | |
170 | m68k_tcg_init(); | |
171 | } | |
172 | } | |
173 | ||
174 | static const VMStateDescription vmstate_m68k_cpu = { | |
175 | .name = "cpu", | |
176 | .unmigratable = 1, | |
177 | }; | |
178 | ||
179 | static void m68k_cpu_class_init(ObjectClass *c, void *data) | |
180 | { | |
181 | M68kCPUClass *mcc = M68K_CPU_CLASS(c); | |
182 | CPUClass *cc = CPU_CLASS(c); | |
183 | DeviceClass *dc = DEVICE_CLASS(c); | |
184 | ||
185 | mcc->parent_realize = dc->realize; | |
186 | dc->realize = m68k_cpu_realizefn; | |
187 | ||
188 | mcc->parent_reset = cc->reset; | |
189 | cc->reset = m68k_cpu_reset; | |
190 | ||
191 | cc->class_by_name = m68k_cpu_class_by_name; | |
192 | cc->do_interrupt = m68k_cpu_do_interrupt; | |
193 | cc->dump_state = m68k_cpu_dump_state; | |
194 | cc->set_pc = m68k_cpu_set_pc; | |
195 | cc->gdb_read_register = m68k_cpu_gdb_read_register; | |
196 | cc->gdb_write_register = m68k_cpu_gdb_write_register; | |
197 | #ifndef CONFIG_USER_ONLY | |
198 | cc->get_phys_page_debug = m68k_cpu_get_phys_page_debug; | |
199 | #endif | |
200 | dc->vmsd = &vmstate_m68k_cpu; | |
201 | cc->gdb_num_core_regs = 18; | |
202 | cc->gdb_core_xml_file = "cf-core.xml"; | |
203 | } | |
204 | ||
205 | static void register_cpu_type(const M68kCPUInfo *info) | |
206 | { | |
207 | TypeInfo type_info = { | |
208 | .parent = TYPE_M68K_CPU, | |
209 | .instance_init = info->instance_init, | |
210 | }; | |
211 | ||
212 | type_info.name = g_strdup_printf("%s-" TYPE_M68K_CPU, info->name); | |
213 | type_register(&type_info); | |
214 | g_free((void *)type_info.name); | |
215 | } | |
216 | ||
217 | static const TypeInfo m68k_cpu_type_info = { | |
218 | .name = TYPE_M68K_CPU, | |
219 | .parent = TYPE_CPU, | |
220 | .instance_size = sizeof(M68kCPU), | |
221 | .instance_init = m68k_cpu_initfn, | |
222 | .abstract = true, | |
223 | .class_size = sizeof(M68kCPUClass), | |
224 | .class_init = m68k_cpu_class_init, | |
225 | }; | |
226 | ||
227 | static void m68k_cpu_register_types(void) | |
228 | { | |
229 | int i; | |
230 | ||
231 | type_register_static(&m68k_cpu_type_info); | |
232 | for (i = 0; i < ARRAY_SIZE(m68k_cpus); i++) { | |
233 | register_cpu_type(&m68k_cpus[i]); | |
234 | } | |
235 | } | |
236 | ||
237 | type_init(m68k_cpu_register_types) |