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 "qemu/qemu-print.h"
  25 #include "cpu.h"
  26 #include "qemu-common.h"
  27 #include "exec/exec-all.h"
  28
  29
  30 static void alpha_cpu_set_pc(CPUState *cs, vaddr value)
  31 {
  32     AlphaCPU *cpu = ALPHA_CPU(cs);
  33
  34     cpu->env.pc = value;
  35 }
  36
  37 static bool alpha_cpu_has_work(CPUState *cs)
  38 {
  39     /* Here we are checking to see if the CPU should wake up from HALT.
  40        We will have gotten into this state only for WTINT from PALmode.  */
  41     /* ??? I'm not sure how the IPL state works with WTINT to keep a CPU
  42        asleep even if (some) interrupts have been asserted.  For now,
  43        assume that if a CPU really wants to stay asleep, it will mask
  44        interrupts at the chipset level, which will prevent these bits
  45        from being set in the first place.  */
  46     return cs->interrupt_request & (CPU_INTERRUPT_HARD
  47                                     | CPU_INTERRUPT_TIMER
  48                                     | CPU_INTERRUPT_SMP
  49                                     | CPU_INTERRUPT_MCHK);
  50 }
  51
  52 static void alpha_cpu_disas_set_info(CPUState *cpu, disassemble_info *info)
  53 {
  54     info->mach = bfd_mach_alpha_ev6;
  55     info->print_insn = print_insn_alpha;
  56 }
  57
  58 static void alpha_cpu_realizefn(DeviceState *dev, Error **errp)
  59 {
  60     CPUState *cs = CPU(dev);
  61     AlphaCPUClass *acc = ALPHA_CPU_GET_CLASS(dev);
  62     Error *local_err = NULL;
  63
  64     cpu_exec_realizefn(cs, &local_err);
  65     if (local_err != NULL) {
  66         error_propagate(errp, local_err);
  67         return;
  68     }
  69
  70     qemu_init_vcpu(cs);
  71
  72     acc->parent_realize(dev, errp);
  73 }
  74
  75 static void alpha_cpu_list_entry(gpointer data, gpointer user_data)
  76 {
  77     ObjectClass *oc = data;
  78
  79     qemu_printf("  %s\n", object_class_get_name(oc));
  80 }
  81
  82 void alpha_cpu_list(void)
  83 {
  84     GSList *list;
  85
  86     list = object_class_get_list_sorted(TYPE_ALPHA_CPU, false);
  87     qemu_printf("Available CPUs:\n");
  88     g_slist_foreach(list, alpha_cpu_list_entry, NULL);
  89     g_slist_free(list);
  90 }
  91
  92 /* Models */
  93 typedef struct AlphaCPUAlias {
  94     const char *alias;
  95     const char *typename;
  96 } AlphaCPUAlias;
  97
  98 static const AlphaCPUAlias alpha_cpu_aliases[] = {
  99     { "21064",   ALPHA_CPU_TYPE_NAME("ev4") },
 100     { "21164",   ALPHA_CPU_TYPE_NAME("ev5") },
 101     { "21164a",  ALPHA_CPU_TYPE_NAME("ev56") },
 102     { "21164pc", ALPHA_CPU_TYPE_NAME("pca56") },
 103     { "21264",   ALPHA_CPU_TYPE_NAME("ev6") },
 104     { "21264a",  ALPHA_CPU_TYPE_NAME("ev67") },
 105 };
 106
 107 static ObjectClass *alpha_cpu_class_by_name(const char *cpu_model)
 108 {
 109     ObjectClass *oc;
 110     char *typename;
 111     int i;
 112
 113     oc = object_class_by_name(cpu_model);
 114     if (oc != NULL && object_class_dynamic_cast(oc, TYPE_ALPHA_CPU) != NULL &&
 115         !object_class_is_abstract(oc)) {
 116         return oc;
 117     }
 118
 119     for (i = 0; i < ARRAY_SIZE(alpha_cpu_aliases); i++) {
 120         if (strcmp(cpu_model, alpha_cpu_aliases[i].alias) == 0) {
 121             oc = object_class_by_name(alpha_cpu_aliases[i].typename);
 122             assert(oc != NULL && !object_class_is_abstract(oc));
 123             return oc;
 124         }
 125     }
 126
 127     typename = g_strdup_printf(ALPHA_CPU_TYPE_NAME("%s"), cpu_model);
 128     oc = object_class_by_name(typename);
 129     g_free(typename);
 130     if (oc != NULL && object_class_is_abstract(oc)) {
 131         oc = NULL;
 132     }
 133
 134     /* TODO: remove match everything nonsense */
 135     /* Default to ev67; no reason not to emulate insns by default. */
 136     if (!oc) {
 137         oc = object_class_by_name(ALPHA_CPU_TYPE_NAME("ev67"));
 138     }
 139
 140     return oc;
 141 }
 142
 143 static void ev4_cpu_initfn(Object *obj)
 144 {
 145     AlphaCPU *cpu = ALPHA_CPU(obj);
 146     CPUAlphaState *env = &cpu->env;
 147
 148     env->implver = IMPLVER_2106x;
 149 }
 150
 151 static void ev5_cpu_initfn(Object *obj)
 152 {
 153     AlphaCPU *cpu = ALPHA_CPU(obj);
 154     CPUAlphaState *env = &cpu->env;
 155
 156     env->implver = IMPLVER_21164;
 157 }
 158
 159 static void ev56_cpu_initfn(Object *obj)
 160 {
 161     AlphaCPU *cpu = ALPHA_CPU(obj);
 162     CPUAlphaState *env = &cpu->env;
 163
 164     env->amask |= AMASK_BWX;
 165 }
 166
 167 static void pca56_cpu_initfn(Object *obj)
 168 {
 169     AlphaCPU *cpu = ALPHA_CPU(obj);
 170     CPUAlphaState *env = &cpu->env;
 171
 172     env->amask |= AMASK_MVI;
 173 }
 174
 175 static void ev6_cpu_initfn(Object *obj)
 176 {
 177     AlphaCPU *cpu = ALPHA_CPU(obj);
 178     CPUAlphaState *env = &cpu->env;
 179
 180     env->implver = IMPLVER_21264;
 181     env->amask = AMASK_BWX | AMASK_FIX | AMASK_MVI | AMASK_TRAP;
 182 }
 183
 184 static void ev67_cpu_initfn(Object *obj)
 185 {
 186     AlphaCPU *cpu = ALPHA_CPU(obj);
 187     CPUAlphaState *env = &cpu->env;
 188
 189     env->amask |= AMASK_CIX | AMASK_PREFETCH;
 190 }
 191
 192 static void alpha_cpu_initfn(Object *obj)
 193 {
 194     CPUState *cs = CPU(obj);
 195     AlphaCPU *cpu = ALPHA_CPU(obj);
 196     CPUAlphaState *env = &cpu->env;
 197
 198     cs->env_ptr = env;
 199
 200     env->lock_addr = -1;
 201 #if defined(CONFIG_USER_ONLY)
 202     env->flags = ENV_FLAG_PS_USER | ENV_FLAG_FEN;
 203     cpu_alpha_store_fpcr(env, (uint64_t)(FPCR_INVD | FPCR_DZED | FPCR_OVFD
 204                                          | FPCR_UNFD | FPCR_INED | FPCR_DNOD
 205                                          | FPCR_DYN_NORMAL) << 32);
 206 #else
 207     env->flags = ENV_FLAG_PAL_MODE | ENV_FLAG_FEN;
 208 #endif
 209 }
 210
 211 static void alpha_cpu_class_init(ObjectClass *oc, void *data)
 212 {
 213     DeviceClass *dc = DEVICE_CLASS(oc);
 214     CPUClass *cc = CPU_CLASS(oc);
 215     AlphaCPUClass *acc = ALPHA_CPU_CLASS(oc);
 216
 217     device_class_set_parent_realize(dc, alpha_cpu_realizefn,
 218                                     &acc->parent_realize);
 219
 220     cc->class_by_name = alpha_cpu_class_by_name;
 221     cc->has_work = alpha_cpu_has_work;
 222     cc->do_interrupt = alpha_cpu_do_interrupt;
 223     cc->cpu_exec_interrupt = alpha_cpu_exec_interrupt;
 224     cc->dump_state = alpha_cpu_dump_state;
 225     cc->set_pc = alpha_cpu_set_pc;
 226     cc->gdb_read_register = alpha_cpu_gdb_read_register;
 227     cc->gdb_write_register = alpha_cpu_gdb_write_register;
 228     cc->tlb_fill = alpha_cpu_tlb_fill;
 229 #ifndef CONFIG_USER_ONLY
 230     cc->do_transaction_failed = alpha_cpu_do_transaction_failed;
 231     cc->do_unaligned_access = alpha_cpu_do_unaligned_access;
 232     cc->get_phys_page_debug = alpha_cpu_get_phys_page_debug;
 233     dc->vmsd = &vmstate_alpha_cpu;
 234 #endif
 235     cc->disas_set_info = alpha_cpu_disas_set_info;
 236     cc->tcg_initialize = alpha_translate_init;
 237
 238     cc->gdb_num_core_regs = 67;
 239 }
 240
 241 #define DEFINE_ALPHA_CPU_TYPE(base_type, cpu_model, initfn) \
 242      {                                                      \
 243          .parent = base_type,                               \
 244          .instance_init = initfn,                           \
 245          .name = ALPHA_CPU_TYPE_NAME(cpu_model),            \
 246      }
 247
 248 static const TypeInfo alpha_cpu_type_infos[] = {
 249     {
 250         .name = TYPE_ALPHA_CPU,
 251         .parent = TYPE_CPU,
 252         .instance_size = sizeof(AlphaCPU),
 253         .instance_init = alpha_cpu_initfn,
 254         .abstract = true,
 255         .class_size = sizeof(AlphaCPUClass),
 256         .class_init = alpha_cpu_class_init,
 257     },
 258     DEFINE_ALPHA_CPU_TYPE(TYPE_ALPHA_CPU, "ev4", ev4_cpu_initfn),
 259     DEFINE_ALPHA_CPU_TYPE(TYPE_ALPHA_CPU, "ev5", ev5_cpu_initfn),
 260     DEFINE_ALPHA_CPU_TYPE(ALPHA_CPU_TYPE_NAME("ev5"), "ev56", ev56_cpu_initfn),
 261     DEFINE_ALPHA_CPU_TYPE(ALPHA_CPU_TYPE_NAME("ev56"), "pca56",
 262                           pca56_cpu_initfn),
 263     DEFINE_ALPHA_CPU_TYPE(TYPE_ALPHA_CPU, "ev6", ev6_cpu_initfn),
 264     DEFINE_ALPHA_CPU_TYPE(ALPHA_CPU_TYPE_NAME("ev6"), "ev67", ev67_cpu_initfn),
 265     DEFINE_ALPHA_CPU_TYPE(ALPHA_CPU_TYPE_NAME("ev67"), "ev68", NULL),
 266 };
 267
 268 DEFINE_TYPES(alpha_cpu_type_infos)