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 "cpu.h"
  23 #include "qemu-common.h"
  24 #include "migration/vmstate.h"
  25
  26
  27 static void alpha_cpu_set_pc(CPUState *cs, vaddr value)
  28 {
  29     AlphaCPU *cpu = ALPHA_CPU(cs);
  30
  31     cpu->env.pc = value;
  32 }
  33
  34 static bool alpha_cpu_has_work(CPUState *cs)
  35 {
  36     /* Here we are checking to see if the CPU should wake up from HALT.
  37        We will have gotten into this state only for WTINT from PALmode.  */
  38     /* ??? I'm not sure how the IPL state works with WTINT to keep a CPU
  39        asleep even if (some) interrupts have been asserted.  For now,
  40        assume that if a CPU really wants to stay asleep, it will mask
  41        interrupts at the chipset level, which will prevent these bits
  42        from being set in the first place.  */
  43     return cs->interrupt_request & (CPU_INTERRUPT_HARD
  44                                     | CPU_INTERRUPT_TIMER
  45                                     | CPU_INTERRUPT_SMP
  46                                     | CPU_INTERRUPT_MCHK);
  47 }
  48
  49 static void alpha_cpu_realizefn(DeviceState *dev, Error **errp)
  50 {
  51     CPUState *cs = CPU(dev);
  52     AlphaCPUClass *acc = ALPHA_CPU_GET_CLASS(dev);
  53
  54     qemu_init_vcpu(cs);
  55
  56     acc->parent_realize(dev, errp);
  57 }
  58
  59 /* Sort alphabetically by type name. */
  60 static gint alpha_cpu_list_compare(gconstpointer a, gconstpointer b)
  61 {
  62     ObjectClass *class_a = (ObjectClass *)a;
  63     ObjectClass *class_b = (ObjectClass *)b;
  64     const char *name_a, *name_b;
  65
  66     name_a = object_class_get_name(class_a);
  67     name_b = object_class_get_name(class_b);
  68     return strcmp(name_a, name_b);
  69 }
  70
  71 static void alpha_cpu_list_entry(gpointer data, gpointer user_data)
  72 {
  73     ObjectClass *oc = data;
  74     CPUListState *s = user_data;
  75
  76     (*s->cpu_fprintf)(s->file, "  %s\n",
  77                       object_class_get_name(oc));
  78 }
  79
  80 void alpha_cpu_list(FILE *f, fprintf_function cpu_fprintf)
  81 {
  82     CPUListState s = {
  83         .file = f,
  84         .cpu_fprintf = cpu_fprintf,
  85     };
  86     GSList *list;
  87
  88     list = object_class_get_list(TYPE_ALPHA_CPU, false);
  89     list = g_slist_sort(list, alpha_cpu_list_compare);
  90     (*cpu_fprintf)(f, "Available CPUs:\n");
  91     g_slist_foreach(list, alpha_cpu_list_entry, &s);
  92     g_slist_free(list);
  93 }
  94
  95 /* Models */
  96
  97 #define TYPE(model) model "-" TYPE_ALPHA_CPU
  98
  99 typedef struct AlphaCPUAlias {
 100     const char *alias;
 101     const char *typename;
 102 } AlphaCPUAlias;
 103
 104 static const AlphaCPUAlias alpha_cpu_aliases[] = {
 105     { "21064",   TYPE("ev4") },
 106     { "21164",   TYPE("ev5") },
 107     { "21164a",  TYPE("ev56") },
 108     { "21164pc", TYPE("pca56") },
 109     { "21264",   TYPE("ev6") },
 110     { "21264a",  TYPE("ev67") },
 111 };
 112
 113 static ObjectClass *alpha_cpu_class_by_name(const char *cpu_model)
 114 {
 115     ObjectClass *oc = NULL;
 116     char *typename;
 117     int i;
 118
 119     if (cpu_model == NULL) {
 120         return NULL;
 121     }
 122
 123     oc = object_class_by_name(cpu_model);
 124     if (oc != NULL && object_class_dynamic_cast(oc, TYPE_ALPHA_CPU) != NULL &&
 125         !object_class_is_abstract(oc)) {
 126         return oc;
 127     }
 128
 129     for (i = 0; i < ARRAY_SIZE(alpha_cpu_aliases); i++) {
 130         if (strcmp(cpu_model, alpha_cpu_aliases[i].alias) == 0) {
 131             oc = object_class_by_name(alpha_cpu_aliases[i].typename);
 132             assert(oc != NULL && !object_class_is_abstract(oc));
 133             return oc;
 134         }
 135     }
 136
 137     typename = g_strdup_printf("%s-" TYPE_ALPHA_CPU, cpu_model);
 138     oc = object_class_by_name(typename);
 139     g_free(typename);
 140     if (oc != NULL && object_class_is_abstract(oc)) {
 141         oc = NULL;
 142     }
 143     return oc;
 144 }
 145
 146 AlphaCPU *cpu_alpha_init(const char *cpu_model)
 147 {
 148     AlphaCPU *cpu;
 149     ObjectClass *cpu_class;
 150
 151     cpu_class = alpha_cpu_class_by_name(cpu_model);
 152     if (cpu_class == NULL) {
 153         /* Default to ev67; no reason not to emulate insns by default.  */
 154         cpu_class = object_class_by_name(TYPE("ev67"));
 155     }
 156     cpu = ALPHA_CPU(object_new(object_class_get_name(cpu_class)));
 157
 158     object_property_set_bool(OBJECT(cpu), true, "realized", NULL);
 159
 160     return cpu;
 161 }
 162
 163 static void ev4_cpu_initfn(Object *obj)
 164 {
 165     AlphaCPU *cpu = ALPHA_CPU(obj);
 166     CPUAlphaState *env = &cpu->env;
 167
 168     env->implver = IMPLVER_2106x;
 169 }
 170
 171 static const TypeInfo ev4_cpu_type_info = {
 172     .name = TYPE("ev4"),
 173     .parent = TYPE_ALPHA_CPU,
 174     .instance_init = ev4_cpu_initfn,
 175 };
 176
 177 static void ev5_cpu_initfn(Object *obj)
 178 {
 179     AlphaCPU *cpu = ALPHA_CPU(obj);
 180     CPUAlphaState *env = &cpu->env;
 181
 182     env->implver = IMPLVER_21164;
 183 }
 184
 185 static const TypeInfo ev5_cpu_type_info = {
 186     .name = TYPE("ev5"),
 187     .parent = TYPE_ALPHA_CPU,
 188     .instance_init = ev5_cpu_initfn,
 189 };
 190
 191 static void ev56_cpu_initfn(Object *obj)
 192 {
 193     AlphaCPU *cpu = ALPHA_CPU(obj);
 194     CPUAlphaState *env = &cpu->env;
 195
 196     env->amask |= AMASK_BWX;
 197 }
 198
 199 static const TypeInfo ev56_cpu_type_info = {
 200     .name = TYPE("ev56"),
 201     .parent = TYPE("ev5"),
 202     .instance_init = ev56_cpu_initfn,
 203 };
 204
 205 static void pca56_cpu_initfn(Object *obj)
 206 {
 207     AlphaCPU *cpu = ALPHA_CPU(obj);
 208     CPUAlphaState *env = &cpu->env;
 209
 210     env->amask |= AMASK_MVI;
 211 }
 212
 213 static const TypeInfo pca56_cpu_type_info = {
 214     .name = TYPE("pca56"),
 215     .parent = TYPE("ev56"),
 216     .instance_init = pca56_cpu_initfn,
 217 };
 218
 219 static void ev6_cpu_initfn(Object *obj)
 220 {
 221     AlphaCPU *cpu = ALPHA_CPU(obj);
 222     CPUAlphaState *env = &cpu->env;
 223
 224     env->implver = IMPLVER_21264;
 225     env->amask = AMASK_BWX | AMASK_FIX | AMASK_MVI | AMASK_TRAP;
 226 }
 227
 228 static const TypeInfo ev6_cpu_type_info = {
 229     .name = TYPE("ev6"),
 230     .parent = TYPE_ALPHA_CPU,
 231     .instance_init = ev6_cpu_initfn,
 232 };
 233
 234 static void ev67_cpu_initfn(Object *obj)
 235 {
 236     AlphaCPU *cpu = ALPHA_CPU(obj);
 237     CPUAlphaState *env = &cpu->env;
 238
 239     env->amask |= AMASK_CIX | AMASK_PREFETCH;
 240 }
 241
 242 static const TypeInfo ev67_cpu_type_info = {
 243     .name = TYPE("ev67"),
 244     .parent = TYPE("ev6"),
 245     .instance_init = ev67_cpu_initfn,
 246 };
 247
 248 static const TypeInfo ev68_cpu_type_info = {
 249     .name = TYPE("ev68"),
 250     .parent = TYPE("ev67"),
 251 };
 252
 253 static void alpha_cpu_initfn(Object *obj)
 254 {
 255     CPUState *cs = CPU(obj);
 256     AlphaCPU *cpu = ALPHA_CPU(obj);
 257     CPUAlphaState *env = &cpu->env;
 258
 259     cs->env_ptr = env;
 260     cpu_exec_init(env);
 261     tlb_flush(cs, 1);
 262
 263     alpha_translate_init();
 264
 265 #if defined(CONFIG_USER_ONLY)
 266     env->ps = PS_USER_MODE;
 267     cpu_alpha_store_fpcr(env, (FPCR_INVD | FPCR_DZED | FPCR_OVFD
 268                                | FPCR_UNFD | FPCR_INED | FPCR_DNOD
 269                                | FPCR_DYN_NORMAL));
 270 #endif
 271     env->lock_addr = -1;
 272     env->fen = 1;
 273 }
 274
 275 static void alpha_cpu_class_init(ObjectClass *oc, void *data)
 276 {
 277     DeviceClass *dc = DEVICE_CLASS(oc);
 278     CPUClass *cc = CPU_CLASS(oc);
 279     AlphaCPUClass *acc = ALPHA_CPU_CLASS(oc);
 280
 281     acc->parent_realize = dc->realize;
 282     dc->realize = alpha_cpu_realizefn;
 283
 284     cc->class_by_name = alpha_cpu_class_by_name;
 285     cc->has_work = alpha_cpu_has_work;
 286     cc->do_interrupt = alpha_cpu_do_interrupt;
 287     cc->cpu_exec_interrupt = alpha_cpu_exec_interrupt;
 288     cc->dump_state = alpha_cpu_dump_state;
 289     cc->set_pc = alpha_cpu_set_pc;
 290     cc->gdb_read_register = alpha_cpu_gdb_read_register;
 291     cc->gdb_write_register = alpha_cpu_gdb_write_register;
 292 #ifdef CONFIG_USER_ONLY
 293     cc->handle_mmu_fault = alpha_cpu_handle_mmu_fault;
 294 #else
 295     cc->do_unassigned_access = alpha_cpu_unassigned_access;
 296     cc->do_unaligned_access = alpha_cpu_do_unaligned_access;
 297     cc->get_phys_page_debug = alpha_cpu_get_phys_page_debug;
 298     dc->vmsd = &vmstate_alpha_cpu;
 299 #endif
 300     cc->gdb_num_core_regs = 67;
 301 }
 302
 303 static const TypeInfo alpha_cpu_type_info = {
 304     .name = TYPE_ALPHA_CPU,
 305     .parent = TYPE_CPU,
 306     .instance_size = sizeof(AlphaCPU),
 307     .instance_init = alpha_cpu_initfn,
 308     .abstract = true,
 309     .class_size = sizeof(AlphaCPUClass),
 310     .class_init = alpha_cpu_class_init,
 311 };
 312
 313 static void alpha_cpu_register_types(void)
 314 {
 315     type_register_static(&alpha_cpu_type_info);
 316     type_register_static(&ev4_cpu_type_info);
 317     type_register_static(&ev5_cpu_type_info);
 318     type_register_static(&ev56_cpu_type_info);
 319     type_register_static(&pca56_cpu_type_info);
 320     type_register_static(&ev6_cpu_type_info);
 321     type_register_static(&ev67_cpu_type_info);
 322     type_register_static(&ev68_cpu_type_info);
 323 }
 324
 325 type_init(alpha_cpu_register_types)