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 static void alpha_cpu_list_entry(gpointer data, gpointer user_data)
  75 {
  76     ObjectClass *oc = data;
  77     CPUListState *s = user_data;
  78
  79     (*s->cpu_fprintf)(s->file, "  %s\n",
  80                       object_class_get_name(oc));
  81 }
  82
  83 void alpha_cpu_list(FILE *f, fprintf_function cpu_fprintf)
  84 {
  85     CPUListState s = {
  86         .file = f,
  87         .cpu_fprintf = cpu_fprintf,
  88     };
  89     GSList *list;
  90
  91     list = object_class_get_list_sorted(TYPE_ALPHA_CPU, false);
  92     (*cpu_fprintf)(f, "Available CPUs:\n");
  93     g_slist_foreach(list, alpha_cpu_list_entry, &s);
  94     g_slist_free(list);
  95 }
  96
  97 /* Models */
  98 typedef struct AlphaCPUAlias {
  99     const char *alias;
 100     const char *typename;
 101 } AlphaCPUAlias;
 102
 103 static const AlphaCPUAlias alpha_cpu_aliases[] = {
 104     { "21064",   ALPHA_CPU_TYPE_NAME("ev4") },
 105     { "21164",   ALPHA_CPU_TYPE_NAME("ev5") },
 106     { "21164a",  ALPHA_CPU_TYPE_NAME("ev56") },
 107     { "21164pc", ALPHA_CPU_TYPE_NAME("pca56") },
 108     { "21264",   ALPHA_CPU_TYPE_NAME("ev6") },
 109     { "21264a",  ALPHA_CPU_TYPE_NAME("ev67") },
 110 };
 111
 112 static ObjectClass *alpha_cpu_class_by_name(const char *cpu_model)
 113 {
 114     ObjectClass *oc;
 115     char *typename;
 116     int i;
 117
 118     oc = object_class_by_name(cpu_model);
 119     if (oc != NULL && object_class_dynamic_cast(oc, TYPE_ALPHA_CPU) != NULL &&
 120         !object_class_is_abstract(oc)) {
 121         return oc;
 122     }
 123
 124     for (i = 0; i < ARRAY_SIZE(alpha_cpu_aliases); i++) {
 125         if (strcmp(cpu_model, alpha_cpu_aliases[i].alias) == 0) {
 126             oc = object_class_by_name(alpha_cpu_aliases[i].typename);
 127             assert(oc != NULL && !object_class_is_abstract(oc));
 128             return oc;
 129         }
 130     }
 131
 132     typename = g_strdup_printf(ALPHA_CPU_TYPE_NAME("%s"), cpu_model);
 133     oc = object_class_by_name(typename);
 134     g_free(typename);
 135     if (oc != NULL && object_class_is_abstract(oc)) {
 136         oc = NULL;
 137     }
 138
 139     /* TODO: remove match everything nonsense */
 140     /* Default to ev67; no reason not to emulate insns by default. */
 141     if (!oc) {
 142         oc = object_class_by_name(ALPHA_CPU_TYPE_NAME("ev67"));
 143     }
 144
 145     return oc;
 146 }
 147
 148 static void ev4_cpu_initfn(Object *obj)
 149 {
 150     AlphaCPU *cpu = ALPHA_CPU(obj);
 151     CPUAlphaState *env = &cpu->env;
 152
 153     env->implver = IMPLVER_2106x;
 154 }
 155
 156 static void ev5_cpu_initfn(Object *obj)
 157 {
 158     AlphaCPU *cpu = ALPHA_CPU(obj);
 159     CPUAlphaState *env = &cpu->env;
 160
 161     env->implver = IMPLVER_21164;
 162 }
 163
 164 static void ev56_cpu_initfn(Object *obj)
 165 {
 166     AlphaCPU *cpu = ALPHA_CPU(obj);
 167     CPUAlphaState *env = &cpu->env;
 168
 169     env->amask |= AMASK_BWX;
 170 }
 171
 172 static void pca56_cpu_initfn(Object *obj)
 173 {
 174     AlphaCPU *cpu = ALPHA_CPU(obj);
 175     CPUAlphaState *env = &cpu->env;
 176
 177     env->amask |= AMASK_MVI;
 178 }
 179
 180 static void ev6_cpu_initfn(Object *obj)
 181 {
 182     AlphaCPU *cpu = ALPHA_CPU(obj);
 183     CPUAlphaState *env = &cpu->env;
 184
 185     env->implver = IMPLVER_21264;
 186     env->amask = AMASK_BWX | AMASK_FIX | AMASK_MVI | AMASK_TRAP;
 187 }
 188
 189 static void ev67_cpu_initfn(Object *obj)
 190 {
 191     AlphaCPU *cpu = ALPHA_CPU(obj);
 192     CPUAlphaState *env = &cpu->env;
 193
 194     env->amask |= AMASK_CIX | AMASK_PREFETCH;
 195 }
 196
 197 static void alpha_cpu_initfn(Object *obj)
 198 {
 199     CPUState *cs = CPU(obj);
 200     AlphaCPU *cpu = ALPHA_CPU(obj);
 201     CPUAlphaState *env = &cpu->env;
 202
 203     cs->env_ptr = env;
 204     tlb_flush(cs);
 205
 206     env->lock_addr = -1;
 207 #if defined(CONFIG_USER_ONLY)
 208     env->flags = ENV_FLAG_PS_USER | ENV_FLAG_FEN;
 209     cpu_alpha_store_fpcr(env, (FPCR_INVD | FPCR_DZED | FPCR_OVFD
 210                                | FPCR_UNFD | FPCR_INED | FPCR_DNOD
 211                                | FPCR_DYN_NORMAL));
 212 #else
 213     env->flags = ENV_FLAG_PAL_MODE | ENV_FLAG_FEN;
 214 #endif
 215 }
 216
 217 static void alpha_cpu_class_init(ObjectClass *oc, void *data)
 218 {
 219     DeviceClass *dc = DEVICE_CLASS(oc);
 220     CPUClass *cc = CPU_CLASS(oc);
 221     AlphaCPUClass *acc = ALPHA_CPU_CLASS(oc);
 222
 223     device_class_set_parent_realize(dc, alpha_cpu_realizefn,
 224                                     &acc->parent_realize);
 225
 226     cc->class_by_name = alpha_cpu_class_by_name;
 227     cc->has_work = alpha_cpu_has_work;
 228     cc->do_interrupt = alpha_cpu_do_interrupt;
 229     cc->cpu_exec_interrupt = alpha_cpu_exec_interrupt;
 230     cc->dump_state = alpha_cpu_dump_state;
 231     cc->set_pc = alpha_cpu_set_pc;
 232     cc->gdb_read_register = alpha_cpu_gdb_read_register;
 233     cc->gdb_write_register = alpha_cpu_gdb_write_register;
 234 #ifdef CONFIG_USER_ONLY
 235     cc->handle_mmu_fault = alpha_cpu_handle_mmu_fault;
 236 #else
 237     cc->do_transaction_failed = alpha_cpu_do_transaction_failed;
 238     cc->do_unaligned_access = alpha_cpu_do_unaligned_access;
 239     cc->get_phys_page_debug = alpha_cpu_get_phys_page_debug;
 240     dc->vmsd = &vmstate_alpha_cpu;
 241 #endif
 242     cc->disas_set_info = alpha_cpu_disas_set_info;
 243     cc->tcg_initialize = alpha_translate_init;
 244
 245     cc->gdb_num_core_regs = 67;
 246 }
 247
 248 #define DEFINE_ALPHA_CPU_TYPE(base_type, cpu_model, initfn) \
 249      {                                                      \
 250          .parent = base_type,                               \
 251          .instance_init = initfn,                           \
 252          .name = ALPHA_CPU_TYPE_NAME(cpu_model),            \
 253      }
 254
 255 static const TypeInfo alpha_cpu_type_infos[] = {
 256     {
 257         .name = TYPE_ALPHA_CPU,
 258         .parent = TYPE_CPU,
 259         .instance_size = sizeof(AlphaCPU),
 260         .instance_init = alpha_cpu_initfn,
 261         .abstract = true,
 262         .class_size = sizeof(AlphaCPUClass),
 263         .class_init = alpha_cpu_class_init,
 264     },
 265     DEFINE_ALPHA_CPU_TYPE(TYPE_ALPHA_CPU, "ev4", ev4_cpu_initfn),
 266     DEFINE_ALPHA_CPU_TYPE(TYPE_ALPHA_CPU, "ev5", ev5_cpu_initfn),
 267     DEFINE_ALPHA_CPU_TYPE(ALPHA_CPU_TYPE_NAME("ev5"), "ev56", ev56_cpu_initfn),
 268     DEFINE_ALPHA_CPU_TYPE(ALPHA_CPU_TYPE_NAME("ev56"), "pca56",
 269                           pca56_cpu_initfn),
 270     DEFINE_ALPHA_CPU_TYPE(TYPE_ALPHA_CPU, "ev6", ev6_cpu_initfn),
 271     DEFINE_ALPHA_CPU_TYPE(ALPHA_CPU_TYPE_NAME("ev6"), "ev67", ev67_cpu_initfn),
 272     DEFINE_ALPHA_CPU_TYPE(ALPHA_CPU_TYPE_NAME("ev67"), "ev68", NULL),
 273 };
 274
 275 DEFINE_TYPES(alpha_cpu_type_infos)