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 "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
  78     qemu_printf("  %s\n", object_class_get_name(oc));
  79 }
  80
  81 void alpha_cpu_list(void)
  82 {
  83     GSList *list;
  84
  85     list = object_class_get_list_sorted(TYPE_ALPHA_CPU, false);
  86     qemu_printf("Available CPUs:\n");
  87     g_slist_foreach(list, alpha_cpu_list_entry, NULL);
  88     g_slist_free(list);
  89 }
  90
  91 /* Models */
  92 typedef struct AlphaCPUAlias {
  93     const char *alias;
  94     const char *typename;
  95 } AlphaCPUAlias;
  96
  97 static const AlphaCPUAlias alpha_cpu_aliases[] = {
  98     { "21064",   ALPHA_CPU_TYPE_NAME("ev4") },
  99     { "21164",   ALPHA_CPU_TYPE_NAME("ev5") },
 100     { "21164a",  ALPHA_CPU_TYPE_NAME("ev56") },
 101     { "21164pc", ALPHA_CPU_TYPE_NAME("pca56") },
 102     { "21264",   ALPHA_CPU_TYPE_NAME("ev6") },
 103     { "21264a",  ALPHA_CPU_TYPE_NAME("ev67") },
 104 };
 105
 106 static ObjectClass *alpha_cpu_class_by_name(const char *cpu_model)
 107 {
 108     ObjectClass *oc;
 109     char *typename;
 110     int i;
 111
 112     oc = object_class_by_name(cpu_model);
 113     if (oc != NULL && object_class_dynamic_cast(oc, TYPE_ALPHA_CPU) != NULL &&
 114         !object_class_is_abstract(oc)) {
 115         return oc;
 116     }
 117
 118     for (i = 0; i < ARRAY_SIZE(alpha_cpu_aliases); i++) {
 119         if (strcmp(cpu_model, alpha_cpu_aliases[i].alias) == 0) {
 120             oc = object_class_by_name(alpha_cpu_aliases[i].typename);
 121             assert(oc != NULL && !object_class_is_abstract(oc));
 122             return oc;
 123         }
 124     }
 125
 126     typename = g_strdup_printf(ALPHA_CPU_TYPE_NAME("%s"), cpu_model);
 127     oc = object_class_by_name(typename);
 128     g_free(typename);
 129     if (oc != NULL && object_class_is_abstract(oc)) {
 130         oc = NULL;
 131     }
 132
 133     /* TODO: remove match everything nonsense */
 134     /* Default to ev67; no reason not to emulate insns by default. */
 135     if (!oc) {
 136         oc = object_class_by_name(ALPHA_CPU_TYPE_NAME("ev67"));
 137     }
 138
 139     return oc;
 140 }
 141
 142 static void ev4_cpu_initfn(Object *obj)
 143 {
 144     AlphaCPU *cpu = ALPHA_CPU(obj);
 145     CPUAlphaState *env = &cpu->env;
 146
 147     env->implver = IMPLVER_2106x;
 148 }
 149
 150 static void ev5_cpu_initfn(Object *obj)
 151 {
 152     AlphaCPU *cpu = ALPHA_CPU(obj);
 153     CPUAlphaState *env = &cpu->env;
 154
 155     env->implver = IMPLVER_21164;
 156 }
 157
 158 static void ev56_cpu_initfn(Object *obj)
 159 {
 160     AlphaCPU *cpu = ALPHA_CPU(obj);
 161     CPUAlphaState *env = &cpu->env;
 162
 163     env->amask |= AMASK_BWX;
 164 }
 165
 166 static void pca56_cpu_initfn(Object *obj)
 167 {
 168     AlphaCPU *cpu = ALPHA_CPU(obj);
 169     CPUAlphaState *env = &cpu->env;
 170
 171     env->amask |= AMASK_MVI;
 172 }
 173
 174 static void ev6_cpu_initfn(Object *obj)
 175 {
 176     AlphaCPU *cpu = ALPHA_CPU(obj);
 177     CPUAlphaState *env = &cpu->env;
 178
 179     env->implver = IMPLVER_21264;
 180     env->amask = AMASK_BWX | AMASK_FIX | AMASK_MVI | AMASK_TRAP;
 181 }
 182
 183 static void ev67_cpu_initfn(Object *obj)
 184 {
 185     AlphaCPU *cpu = ALPHA_CPU(obj);
 186     CPUAlphaState *env = &cpu->env;
 187
 188     env->amask |= AMASK_CIX | AMASK_PREFETCH;
 189 }
 190
 191 static void alpha_cpu_initfn(Object *obj)
 192 {
 193     AlphaCPU *cpu = ALPHA_CPU(obj);
 194     CPUAlphaState *env = &cpu->env;
 195
 196     cpu_set_cpustate_pointers(cpu);
 197
 198     env->lock_addr = -1;
 199 #if defined(CONFIG_USER_ONLY)
 200     env->flags = ENV_FLAG_PS_USER | ENV_FLAG_FEN;
 201     cpu_alpha_store_fpcr(env, (uint64_t)(FPCR_INVD | FPCR_DZED | FPCR_OVFD
 202                                          | FPCR_UNFD | FPCR_INED | FPCR_DNOD
 203                                          | FPCR_DYN_NORMAL) << 32);
 204 #else
 205     env->flags = ENV_FLAG_PAL_MODE | ENV_FLAG_FEN;
 206 #endif
 207 }
 208
 209 static void alpha_cpu_class_init(ObjectClass *oc, void *data)
 210 {
 211     DeviceClass *dc = DEVICE_CLASS(oc);
 212     CPUClass *cc = CPU_CLASS(oc);
 213     AlphaCPUClass *acc = ALPHA_CPU_CLASS(oc);
 214
 215     device_class_set_parent_realize(dc, alpha_cpu_realizefn,
 216                                     &acc->parent_realize);
 217
 218     cc->class_by_name = alpha_cpu_class_by_name;
 219     cc->has_work = alpha_cpu_has_work;
 220     cc->do_interrupt = alpha_cpu_do_interrupt;
 221     cc->cpu_exec_interrupt = alpha_cpu_exec_interrupt;
 222     cc->dump_state = alpha_cpu_dump_state;
 223     cc->set_pc = alpha_cpu_set_pc;
 224     cc->gdb_read_register = alpha_cpu_gdb_read_register;
 225     cc->gdb_write_register = alpha_cpu_gdb_write_register;
 226     cc->tlb_fill = alpha_cpu_tlb_fill;
 227 #ifndef CONFIG_USER_ONLY
 228     cc->do_transaction_failed = alpha_cpu_do_transaction_failed;
 229     cc->do_unaligned_access = alpha_cpu_do_unaligned_access;
 230     cc->get_phys_page_debug = alpha_cpu_get_phys_page_debug;
 231     dc->vmsd = &vmstate_alpha_cpu;
 232 #endif
 233     cc->disas_set_info = alpha_cpu_disas_set_info;
 234     cc->tcg_initialize = alpha_translate_init;
 235
 236     cc->gdb_num_core_regs = 67;
 237 }
 238
 239 #define DEFINE_ALPHA_CPU_TYPE(base_type, cpu_model, initfn) \
 240      {                                                      \
 241          .parent = base_type,                               \
 242          .instance_init = initfn,                           \
 243          .name = ALPHA_CPU_TYPE_NAME(cpu_model),            \
 244      }
 245
 246 static const TypeInfo alpha_cpu_type_infos[] = {
 247     {
 248         .name = TYPE_ALPHA_CPU,
 249         .parent = TYPE_CPU,
 250         .instance_size = sizeof(AlphaCPU),
 251         .instance_init = alpha_cpu_initfn,
 252         .abstract = true,
 253         .class_size = sizeof(AlphaCPUClass),
 254         .class_init = alpha_cpu_class_init,
 255     },
 256     DEFINE_ALPHA_CPU_TYPE(TYPE_ALPHA_CPU, "ev4", ev4_cpu_initfn),
 257     DEFINE_ALPHA_CPU_TYPE(TYPE_ALPHA_CPU, "ev5", ev5_cpu_initfn),
 258     DEFINE_ALPHA_CPU_TYPE(ALPHA_CPU_TYPE_NAME("ev5"), "ev56", ev56_cpu_initfn),
 259     DEFINE_ALPHA_CPU_TYPE(ALPHA_CPU_TYPE_NAME("ev56"), "pca56",
 260                           pca56_cpu_initfn),
 261     DEFINE_ALPHA_CPU_TYPE(TYPE_ALPHA_CPU, "ev6", ev6_cpu_initfn),
 262     DEFINE_ALPHA_CPU_TYPE(ALPHA_CPU_TYPE_NAME("ev6"), "ev67", ev67_cpu_initfn),
 263     DEFINE_ALPHA_CPU_TYPE(ALPHA_CPU_TYPE_NAME("ev67"), "ev68", NULL),
 264 };
 265
 266 DEFINE_TYPES(alpha_cpu_type_infos)