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 "exec/exec-all.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     Error *local_err = NULL;
  62
  63     cpu_exec_realizefn(cs, &local_err);
  64     if (local_err != NULL) {
  65         error_propagate(errp, local_err);
  66         return;
  67     }
  68
  69     qemu_init_vcpu(cs);
  70
  71     acc->parent_realize(dev, errp);
  72 }
  73
  74 /* Sort alphabetically by type name. */
  75 static gint alpha_cpu_list_compare(gconstpointer a, gconstpointer b)
  76 {
  77     ObjectClass *class_a = (ObjectClass *)a;
  78     ObjectClass *class_b = (ObjectClass *)b;
  79     const char *name_a, *name_b;
  80
  81     name_a = object_class_get_name(class_a);
  82     name_b = object_class_get_name(class_b);
  83     return strcmp(name_a, name_b);
  84 }
  85
  86 static void alpha_cpu_list_entry(gpointer data, gpointer user_data)
  87 {
  88     ObjectClass *oc = data;
  89     CPUListState *s = user_data;
  90
  91     (*s->cpu_fprintf)(s->file, "  %s\n",
  92                       object_class_get_name(oc));
  93 }
  94
  95 void alpha_cpu_list(FILE *f, fprintf_function cpu_fprintf)
  96 {
  97     CPUListState s = {
  98         .file = f,
  99         .cpu_fprintf = cpu_fprintf,
 100     };
 101     GSList *list;
 102
 103     list = object_class_get_list(TYPE_ALPHA_CPU, false);
 104     list = g_slist_sort(list, alpha_cpu_list_compare);
 105     (*cpu_fprintf)(f, "Available CPUs:\n");
 106     g_slist_foreach(list, alpha_cpu_list_entry, &s);
 107     g_slist_free(list);
 108 }
 109
 110 /* Models */
 111
 112 #define TYPE(model) model "-" TYPE_ALPHA_CPU
 113
 114 typedef struct AlphaCPUAlias {
 115     const char *alias;
 116     const char *typename;
 117 } AlphaCPUAlias;
 118
 119 static const AlphaCPUAlias alpha_cpu_aliases[] = {
 120     { "21064",   TYPE("ev4") },
 121     { "21164",   TYPE("ev5") },
 122     { "21164a",  TYPE("ev56") },
 123     { "21164pc", TYPE("pca56") },
 124     { "21264",   TYPE("ev6") },
 125     { "21264a",  TYPE("ev67") },
 126 };
 127
 128 static ObjectClass *alpha_cpu_class_by_name(const char *cpu_model)
 129 {
 130     ObjectClass *oc = NULL;
 131     char *typename;
 132     int i;
 133
 134     if (cpu_model == NULL) {
 135         return NULL;
 136     }
 137
 138     oc = object_class_by_name(cpu_model);
 139     if (oc != NULL && object_class_dynamic_cast(oc, TYPE_ALPHA_CPU) != NULL &&
 140         !object_class_is_abstract(oc)) {
 141         return oc;
 142     }
 143
 144     for (i = 0; i < ARRAY_SIZE(alpha_cpu_aliases); i++) {
 145         if (strcmp(cpu_model, alpha_cpu_aliases[i].alias) == 0) {
 146             oc = object_class_by_name(alpha_cpu_aliases[i].typename);
 147             assert(oc != NULL && !object_class_is_abstract(oc));
 148             return oc;
 149         }
 150     }
 151
 152     typename = g_strdup_printf("%s-" TYPE_ALPHA_CPU, cpu_model);
 153     oc = object_class_by_name(typename);
 154     g_free(typename);
 155     if (oc != NULL && object_class_is_abstract(oc)) {
 156         oc = NULL;
 157     }
 158
 159     /* TODO: remove match everything nonsense */
 160     /* Default to ev67; no reason not to emulate insns by default. */
 161     if (!oc) {
 162         oc = object_class_by_name(TYPE("ev67"));
 163     }
 164
 165     return oc;
 166 }
 167
 168 static void ev4_cpu_initfn(Object *obj)
 169 {
 170     AlphaCPU *cpu = ALPHA_CPU(obj);
 171     CPUAlphaState *env = &cpu->env;
 172
 173     env->implver = IMPLVER_2106x;
 174 }
 175
 176 static const TypeInfo ev4_cpu_type_info = {
 177     .name = TYPE("ev4"),
 178     .parent = TYPE_ALPHA_CPU,
 179     .instance_init = ev4_cpu_initfn,
 180 };
 181
 182 static void ev5_cpu_initfn(Object *obj)
 183 {
 184     AlphaCPU *cpu = ALPHA_CPU(obj);
 185     CPUAlphaState *env = &cpu->env;
 186
 187     env->implver = IMPLVER_21164;
 188 }
 189
 190 static const TypeInfo ev5_cpu_type_info = {
 191     .name = TYPE("ev5"),
 192     .parent = TYPE_ALPHA_CPU,
 193     .instance_init = ev5_cpu_initfn,
 194 };
 195
 196 static void ev56_cpu_initfn(Object *obj)
 197 {
 198     AlphaCPU *cpu = ALPHA_CPU(obj);
 199     CPUAlphaState *env = &cpu->env;
 200
 201     env->amask |= AMASK_BWX;
 202 }
 203
 204 static const TypeInfo ev56_cpu_type_info = {
 205     .name = TYPE("ev56"),
 206     .parent = TYPE("ev5"),
 207     .instance_init = ev56_cpu_initfn,
 208 };
 209
 210 static void pca56_cpu_initfn(Object *obj)
 211 {
 212     AlphaCPU *cpu = ALPHA_CPU(obj);
 213     CPUAlphaState *env = &cpu->env;
 214
 215     env->amask |= AMASK_MVI;
 216 }
 217
 218 static const TypeInfo pca56_cpu_type_info = {
 219     .name = TYPE("pca56"),
 220     .parent = TYPE("ev56"),
 221     .instance_init = pca56_cpu_initfn,
 222 };
 223
 224 static void ev6_cpu_initfn(Object *obj)
 225 {
 226     AlphaCPU *cpu = ALPHA_CPU(obj);
 227     CPUAlphaState *env = &cpu->env;
 228
 229     env->implver = IMPLVER_21264;
 230     env->amask = AMASK_BWX | AMASK_FIX | AMASK_MVI | AMASK_TRAP;
 231 }
 232
 233 static const TypeInfo ev6_cpu_type_info = {
 234     .name = TYPE("ev6"),
 235     .parent = TYPE_ALPHA_CPU,
 236     .instance_init = ev6_cpu_initfn,
 237 };
 238
 239 static void ev67_cpu_initfn(Object *obj)
 240 {
 241     AlphaCPU *cpu = ALPHA_CPU(obj);
 242     CPUAlphaState *env = &cpu->env;
 243
 244     env->amask |= AMASK_CIX | AMASK_PREFETCH;
 245 }
 246
 247 static const TypeInfo ev67_cpu_type_info = {
 248     .name = TYPE("ev67"),
 249     .parent = TYPE("ev6"),
 250     .instance_init = ev67_cpu_initfn,
 251 };
 252
 253 static const TypeInfo ev68_cpu_type_info = {
 254     .name = TYPE("ev68"),
 255     .parent = TYPE("ev67"),
 256 };
 257
 258 static void alpha_cpu_initfn(Object *obj)
 259 {
 260     CPUState *cs = CPU(obj);
 261     AlphaCPU *cpu = ALPHA_CPU(obj);
 262     CPUAlphaState *env = &cpu->env;
 263
 264     cs->env_ptr = env;
 265     tlb_flush(cs);
 266
 267     alpha_translate_init();
 268
 269     env->lock_addr = -1;
 270 #if defined(CONFIG_USER_ONLY)
 271     env->flags = ENV_FLAG_PS_USER | ENV_FLAG_FEN;
 272     cpu_alpha_store_fpcr(env, (FPCR_INVD | FPCR_DZED | FPCR_OVFD
 273                                | FPCR_UNFD | FPCR_INED | FPCR_DNOD
 274                                | FPCR_DYN_NORMAL));
 275 #else
 276     env->flags = ENV_FLAG_PAL_MODE | ENV_FLAG_FEN;
 277 #endif
 278 }
 279
 280 static void alpha_cpu_class_init(ObjectClass *oc, void *data)
 281 {
 282     DeviceClass *dc = DEVICE_CLASS(oc);
 283     CPUClass *cc = CPU_CLASS(oc);
 284     AlphaCPUClass *acc = ALPHA_CPU_CLASS(oc);
 285
 286     acc->parent_realize = dc->realize;
 287     dc->realize = alpha_cpu_realizefn;
 288
 289     cc->class_by_name = alpha_cpu_class_by_name;
 290     cc->has_work = alpha_cpu_has_work;
 291     cc->do_interrupt = alpha_cpu_do_interrupt;
 292     cc->cpu_exec_interrupt = alpha_cpu_exec_interrupt;
 293     cc->dump_state = alpha_cpu_dump_state;
 294     cc->set_pc = alpha_cpu_set_pc;
 295     cc->gdb_read_register = alpha_cpu_gdb_read_register;
 296     cc->gdb_write_register = alpha_cpu_gdb_write_register;
 297 #ifdef CONFIG_USER_ONLY
 298     cc->handle_mmu_fault = alpha_cpu_handle_mmu_fault;
 299 #else
 300     cc->do_transaction_failed = alpha_cpu_do_transaction_failed;
 301     cc->do_unaligned_access = alpha_cpu_do_unaligned_access;
 302     cc->get_phys_page_debug = alpha_cpu_get_phys_page_debug;
 303     dc->vmsd = &vmstate_alpha_cpu;
 304 #endif
 305     cc->disas_set_info = alpha_cpu_disas_set_info;
 306
 307     cc->gdb_num_core_regs = 67;
 308 }
 309
 310 static const TypeInfo alpha_cpu_type_info = {
 311     .name = TYPE_ALPHA_CPU,
 312     .parent = TYPE_CPU,
 313     .instance_size = sizeof(AlphaCPU),
 314     .instance_init = alpha_cpu_initfn,
 315     .abstract = true,
 316     .class_size = sizeof(AlphaCPUClass),
 317     .class_init = alpha_cpu_class_init,
 318 };
 319
 320 static void alpha_cpu_register_types(void)
 321 {
 322     type_register_static(&alpha_cpu_type_info);
 323     type_register_static(&ev4_cpu_type_info);
 324     type_register_static(&ev5_cpu_type_info);
 325     type_register_static(&ev56_cpu_type_info);
 326     type_register_static(&pca56_cpu_type_info);
 327     type_register_static(&ev6_cpu_type_info);
 328     type_register_static(&ev67_cpu_type_info);
 329     type_register_static(&ev68_cpu_type_info);
 330 }
 331
 332 type_init(alpha_cpu_register_types)