These changes are the raw update to qemu-2.6.
[kvmfornfv.git] / qemu / target-alpha / cpu.c
1 /*
2  * QEMU Alpha CPU
3  *
4  * Copyright (c) 2007 Jocelyn Mayer
5  * Copyright (c) 2012 SUSE LINUX Products GmbH
6  *
7  * This library is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * This library is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with this library; if not, see
19  * <http://www.gnu.org/licenses/lgpl-2.1.html>
20  */
21
22 #include "qemu/osdep.h"
23 #include "qapi/error.h"
24 #include "cpu.h"
25 #include "qemu-common.h"
26 #include "migration/vmstate.h"
27
28
29 static void alpha_cpu_set_pc(CPUState *cs, vaddr value)
30 {
31     AlphaCPU *cpu = ALPHA_CPU(cs);
32
33     cpu->env.pc = value;
34 }
35
36 static bool alpha_cpu_has_work(CPUState *cs)
37 {
38     /* Here we are checking to see if the CPU should wake up from HALT.
39        We will have gotten into this state only for WTINT from PALmode.  */
40     /* ??? I'm not sure how the IPL state works with WTINT to keep a CPU
41        asleep even if (some) interrupts have been asserted.  For now,
42        assume that if a CPU really wants to stay asleep, it will mask
43        interrupts at the chipset level, which will prevent these bits
44        from being set in the first place.  */
45     return cs->interrupt_request & (CPU_INTERRUPT_HARD
46                                     | CPU_INTERRUPT_TIMER
47                                     | CPU_INTERRUPT_SMP
48                                     | CPU_INTERRUPT_MCHK);
49 }
50
51 static void alpha_cpu_disas_set_info(CPUState *cpu, disassemble_info *info)
52 {
53     info->mach = bfd_mach_alpha_ev6;
54     info->print_insn = print_insn_alpha;
55 }
56
57 static void alpha_cpu_realizefn(DeviceState *dev, Error **errp)
58 {
59     CPUState *cs = CPU(dev);
60     AlphaCPUClass *acc = ALPHA_CPU_GET_CLASS(dev);
61
62     qemu_init_vcpu(cs);
63
64     acc->parent_realize(dev, errp);
65 }
66
67 /* Sort alphabetically by type name. */
68 static gint alpha_cpu_list_compare(gconstpointer a, gconstpointer b)
69 {
70     ObjectClass *class_a = (ObjectClass *)a;
71     ObjectClass *class_b = (ObjectClass *)b;
72     const char *name_a, *name_b;
73
74     name_a = object_class_get_name(class_a);
75     name_b = object_class_get_name(class_b);
76     return strcmp(name_a, name_b);
77 }
78
79 static void alpha_cpu_list_entry(gpointer data, gpointer user_data)
80 {
81     ObjectClass *oc = data;
82     CPUListState *s = user_data;
83
84     (*s->cpu_fprintf)(s->file, "  %s\n",
85                       object_class_get_name(oc));
86 }
87
88 void alpha_cpu_list(FILE *f, fprintf_function cpu_fprintf)
89 {
90     CPUListState s = {
91         .file = f,
92         .cpu_fprintf = cpu_fprintf,
93     };
94     GSList *list;
95
96     list = object_class_get_list(TYPE_ALPHA_CPU, false);
97     list = g_slist_sort(list, alpha_cpu_list_compare);
98     (*cpu_fprintf)(f, "Available CPUs:\n");
99     g_slist_foreach(list, alpha_cpu_list_entry, &s);
100     g_slist_free(list);
101 }
102
103 /* Models */
104
105 #define TYPE(model) model "-" TYPE_ALPHA_CPU
106
107 typedef struct AlphaCPUAlias {
108     const char *alias;
109     const char *typename;
110 } AlphaCPUAlias;
111
112 static const AlphaCPUAlias alpha_cpu_aliases[] = {
113     { "21064",   TYPE("ev4") },
114     { "21164",   TYPE("ev5") },
115     { "21164a",  TYPE("ev56") },
116     { "21164pc", TYPE("pca56") },
117     { "21264",   TYPE("ev6") },
118     { "21264a",  TYPE("ev67") },
119 };
120
121 static ObjectClass *alpha_cpu_class_by_name(const char *cpu_model)
122 {
123     ObjectClass *oc = NULL;
124     char *typename;
125     int i;
126
127     if (cpu_model == NULL) {
128         return NULL;
129     }
130
131     oc = object_class_by_name(cpu_model);
132     if (oc != NULL && object_class_dynamic_cast(oc, TYPE_ALPHA_CPU) != NULL &&
133         !object_class_is_abstract(oc)) {
134         return oc;
135     }
136
137     for (i = 0; i < ARRAY_SIZE(alpha_cpu_aliases); i++) {
138         if (strcmp(cpu_model, alpha_cpu_aliases[i].alias) == 0) {
139             oc = object_class_by_name(alpha_cpu_aliases[i].typename);
140             assert(oc != NULL && !object_class_is_abstract(oc));
141             return oc;
142         }
143     }
144
145     typename = g_strdup_printf("%s-" TYPE_ALPHA_CPU, cpu_model);
146     oc = object_class_by_name(typename);
147     g_free(typename);
148     if (oc != NULL && object_class_is_abstract(oc)) {
149         oc = NULL;
150     }
151     return oc;
152 }
153
154 AlphaCPU *cpu_alpha_init(const char *cpu_model)
155 {
156     AlphaCPU *cpu;
157     ObjectClass *cpu_class;
158
159     cpu_class = alpha_cpu_class_by_name(cpu_model);
160     if (cpu_class == NULL) {
161         /* Default to ev67; no reason not to emulate insns by default.  */
162         cpu_class = object_class_by_name(TYPE("ev67"));
163     }
164     cpu = ALPHA_CPU(object_new(object_class_get_name(cpu_class)));
165
166     object_property_set_bool(OBJECT(cpu), true, "realized", NULL);
167
168     return cpu;
169 }
170
171 static void ev4_cpu_initfn(Object *obj)
172 {
173     AlphaCPU *cpu = ALPHA_CPU(obj);
174     CPUAlphaState *env = &cpu->env;
175
176     env->implver = IMPLVER_2106x;
177 }
178
179 static const TypeInfo ev4_cpu_type_info = {
180     .name = TYPE("ev4"),
181     .parent = TYPE_ALPHA_CPU,
182     .instance_init = ev4_cpu_initfn,
183 };
184
185 static void ev5_cpu_initfn(Object *obj)
186 {
187     AlphaCPU *cpu = ALPHA_CPU(obj);
188     CPUAlphaState *env = &cpu->env;
189
190     env->implver = IMPLVER_21164;
191 }
192
193 static const TypeInfo ev5_cpu_type_info = {
194     .name = TYPE("ev5"),
195     .parent = TYPE_ALPHA_CPU,
196     .instance_init = ev5_cpu_initfn,
197 };
198
199 static void ev56_cpu_initfn(Object *obj)
200 {
201     AlphaCPU *cpu = ALPHA_CPU(obj);
202     CPUAlphaState *env = &cpu->env;
203
204     env->amask |= AMASK_BWX;
205 }
206
207 static const TypeInfo ev56_cpu_type_info = {
208     .name = TYPE("ev56"),
209     .parent = TYPE("ev5"),
210     .instance_init = ev56_cpu_initfn,
211 };
212
213 static void pca56_cpu_initfn(Object *obj)
214 {
215     AlphaCPU *cpu = ALPHA_CPU(obj);
216     CPUAlphaState *env = &cpu->env;
217
218     env->amask |= AMASK_MVI;
219 }
220
221 static const TypeInfo pca56_cpu_type_info = {
222     .name = TYPE("pca56"),
223     .parent = TYPE("ev56"),
224     .instance_init = pca56_cpu_initfn,
225 };
226
227 static void ev6_cpu_initfn(Object *obj)
228 {
229     AlphaCPU *cpu = ALPHA_CPU(obj);
230     CPUAlphaState *env = &cpu->env;
231
232     env->implver = IMPLVER_21264;
233     env->amask = AMASK_BWX | AMASK_FIX | AMASK_MVI | AMASK_TRAP;
234 }
235
236 static const TypeInfo ev6_cpu_type_info = {
237     .name = TYPE("ev6"),
238     .parent = TYPE_ALPHA_CPU,
239     .instance_init = ev6_cpu_initfn,
240 };
241
242 static void ev67_cpu_initfn(Object *obj)
243 {
244     AlphaCPU *cpu = ALPHA_CPU(obj);
245     CPUAlphaState *env = &cpu->env;
246
247     env->amask |= AMASK_CIX | AMASK_PREFETCH;
248 }
249
250 static const TypeInfo ev67_cpu_type_info = {
251     .name = TYPE("ev67"),
252     .parent = TYPE("ev6"),
253     .instance_init = ev67_cpu_initfn,
254 };
255
256 static const TypeInfo ev68_cpu_type_info = {
257     .name = TYPE("ev68"),
258     .parent = TYPE("ev67"),
259 };
260
261 static void alpha_cpu_initfn(Object *obj)
262 {
263     CPUState *cs = CPU(obj);
264     AlphaCPU *cpu = ALPHA_CPU(obj);
265     CPUAlphaState *env = &cpu->env;
266
267     cs->env_ptr = env;
268     cpu_exec_init(cs, &error_abort);
269     tlb_flush(cs, 1);
270
271     alpha_translate_init();
272
273 #if defined(CONFIG_USER_ONLY)
274     env->ps = PS_USER_MODE;
275     cpu_alpha_store_fpcr(env, (FPCR_INVD | FPCR_DZED | FPCR_OVFD
276                                | FPCR_UNFD | FPCR_INED | FPCR_DNOD
277                                | FPCR_DYN_NORMAL));
278 #endif
279     env->lock_addr = -1;
280     env->fen = 1;
281 }
282
283 static void alpha_cpu_class_init(ObjectClass *oc, void *data)
284 {
285     DeviceClass *dc = DEVICE_CLASS(oc);
286     CPUClass *cc = CPU_CLASS(oc);
287     AlphaCPUClass *acc = ALPHA_CPU_CLASS(oc);
288
289     acc->parent_realize = dc->realize;
290     dc->realize = alpha_cpu_realizefn;
291
292     cc->class_by_name = alpha_cpu_class_by_name;
293     cc->has_work = alpha_cpu_has_work;
294     cc->do_interrupt = alpha_cpu_do_interrupt;
295     cc->cpu_exec_interrupt = alpha_cpu_exec_interrupt;
296     cc->dump_state = alpha_cpu_dump_state;
297     cc->set_pc = alpha_cpu_set_pc;
298     cc->gdb_read_register = alpha_cpu_gdb_read_register;
299     cc->gdb_write_register = alpha_cpu_gdb_write_register;
300 #ifdef CONFIG_USER_ONLY
301     cc->handle_mmu_fault = alpha_cpu_handle_mmu_fault;
302 #else
303     cc->do_unassigned_access = alpha_cpu_unassigned_access;
304     cc->do_unaligned_access = alpha_cpu_do_unaligned_access;
305     cc->get_phys_page_debug = alpha_cpu_get_phys_page_debug;
306     dc->vmsd = &vmstate_alpha_cpu;
307 #endif
308     cc->disas_set_info = alpha_cpu_disas_set_info;
309
310     cc->gdb_num_core_regs = 67;
311
312     /*
313      * Reason: alpha_cpu_initfn() calls cpu_exec_init(), which saves
314      * the object in cpus -> dangling pointer after final
315      * object_unref().
316      */
317     dc->cannot_destroy_with_object_finalize_yet = true;
318 }
319
320 static const TypeInfo alpha_cpu_type_info = {
321     .name = TYPE_ALPHA_CPU,
322     .parent = TYPE_CPU,
323     .instance_size = sizeof(AlphaCPU),
324     .instance_init = alpha_cpu_initfn,
325     .abstract = true,
326     .class_size = sizeof(AlphaCPUClass),
327     .class_init = alpha_cpu_class_init,
328 };
329
330 static void alpha_cpu_register_types(void)
331 {
332     type_register_static(&alpha_cpu_type_info);
333     type_register_static(&ev4_cpu_type_info);
334     type_register_static(&ev5_cpu_type_info);
335     type_register_static(&ev56_cpu_type_info);
336     type_register_static(&pca56_cpu_type_info);
337     type_register_static(&ev6_cpu_type_info);
338     type_register_static(&ev67_cpu_type_info);
339     type_register_static(&ev68_cpu_type_info);
340 }
341
342 type_init(alpha_cpu_register_types)