target/moxie/cpu.c

   1 /*
   2  * QEMU Moxie CPU
   3  *
   4  * Copyright (c) 2013 Anthony Green
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public License
  17  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include "qemu/osdep.h"
  21 #include "qapi/error.h"
  22 #include "cpu.h"
  23 #include "migration/vmstate.h"
  24 #include "machine.h"
  25
  26 static void moxie_cpu_set_pc(CPUState *cs, vaddr value)
  27 {
  28     MoxieCPU *cpu = MOXIE_CPU(cs);
  29
  30     cpu->env.pc = value;
  31 }
  32
  33 static bool moxie_cpu_has_work(CPUState *cs)
  34 {
  35     return cs->interrupt_request & CPU_INTERRUPT_HARD;
  36 }
  37
  38 static void moxie_cpu_reset(CPUState *s)
  39 {
  40     MoxieCPU *cpu = MOXIE_CPU(s);
  41     MoxieCPUClass *mcc = MOXIE_CPU_GET_CLASS(cpu);
  42     CPUMoxieState *env = &cpu->env;
  43
  44     mcc->parent_reset(s);
  45
  46     memset(env, 0, offsetof(CPUMoxieState, end_reset_fields));
  47     env->pc = 0x1000;
  48 }
  49
  50 static void moxie_cpu_disas_set_info(CPUState *cpu, disassemble_info *info)
  51 {
  52     info->mach = bfd_arch_moxie;
  53     info->print_insn = print_insn_moxie;
  54 }
  55
  56 static void moxie_cpu_realizefn(DeviceState *dev, Error **errp)
  57 {
  58     CPUState *cs = CPU(dev);
  59     MoxieCPUClass *mcc = MOXIE_CPU_GET_CLASS(dev);
  60     Error *local_err = NULL;
  61
  62     cpu_exec_realizefn(cs, &local_err);
  63     if (local_err != NULL) {
  64         error_propagate(errp, local_err);
  65         return;
  66     }
  67
  68     qemu_init_vcpu(cs);
  69     cpu_reset(cs);
  70
  71     mcc->parent_realize(dev, errp);
  72 }
  73
  74 static void moxie_cpu_initfn(Object *obj)
  75 {
  76     MoxieCPU *cpu = MOXIE_CPU(obj);
  77
  78     cpu_set_cpustate_pointers(cpu);
  79 }
  80
  81 static ObjectClass *moxie_cpu_class_by_name(const char *cpu_model)
  82 {
  83     ObjectClass *oc;
  84     char *typename;
  85
  86     typename = g_strdup_printf(MOXIE_CPU_TYPE_NAME("%s"), cpu_model);
  87     oc = object_class_by_name(typename);
  88     g_free(typename);
  89     if (oc != NULL && (!object_class_dynamic_cast(oc, TYPE_MOXIE_CPU) ||
  90                        object_class_is_abstract(oc))) {
  91         return NULL;
  92     }
  93     return oc;
  94 }
  95
  96 static void moxie_cpu_class_init(ObjectClass *oc, void *data)
  97 {
  98     DeviceClass *dc = DEVICE_CLASS(oc);
  99     CPUClass *cc = CPU_CLASS(oc);
 100     MoxieCPUClass *mcc = MOXIE_CPU_CLASS(oc);
 101
 102     device_class_set_parent_realize(dc, moxie_cpu_realizefn,
 103                                     &mcc->parent_realize);
 104     mcc->parent_reset = cc->reset;
 105     cc->reset = moxie_cpu_reset;
 106
 107     cc->class_by_name = moxie_cpu_class_by_name;
 108
 109     cc->has_work = moxie_cpu_has_work;
 110     cc->do_interrupt = moxie_cpu_do_interrupt;
 111     cc->dump_state = moxie_cpu_dump_state;
 112     cc->set_pc = moxie_cpu_set_pc;
 113     cc->tlb_fill = moxie_cpu_tlb_fill;
 114 #ifndef CONFIG_USER_ONLY
 115     cc->get_phys_page_debug = moxie_cpu_get_phys_page_debug;
 116     cc->vmsd = &vmstate_moxie_cpu;
 117 #endif
 118     cc->disas_set_info = moxie_cpu_disas_set_info;
 119     cc->tcg_initialize = moxie_translate_init;
 120 }
 121
 122 static void moxielite_initfn(Object *obj)
 123 {
 124     /* Set cpu feature flags */
 125 }
 126
 127 static void moxie_any_initfn(Object *obj)
 128 {
 129     /* Set cpu feature flags */
 130 }
 131
 132 #define DEFINE_MOXIE_CPU_TYPE(cpu_model, initfn) \
 133     {                                            \
 134         .parent = TYPE_MOXIE_CPU,                \
 135         .instance_init = initfn,                 \
 136         .name = MOXIE_CPU_TYPE_NAME(cpu_model),  \
 137     }
 138
 139 static const TypeInfo moxie_cpus_type_infos[] = {
 140     { /* base class should be registered first */
 141         .name = TYPE_MOXIE_CPU,
 142         .parent = TYPE_CPU,
 143         .instance_size = sizeof(MoxieCPU),
 144         .instance_init = moxie_cpu_initfn,
 145         .class_size = sizeof(MoxieCPUClass),
 146         .class_init = moxie_cpu_class_init,
 147     },
 148     DEFINE_MOXIE_CPU_TYPE("MoxieLite", moxielite_initfn),
 149     DEFINE_MOXIE_CPU_TYPE("any", moxie_any_initfn),
 150 };
 151
 152 DEFINE_TYPES(moxie_cpus_type_infos)