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 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 "qemu-common.h"
  24 #include "migration/vmstate.h"
  25 #include "machine.h"
  26
  27 static void moxie_cpu_set_pc(CPUState *cs, vaddr value)
  28 {
  29     MoxieCPU *cpu = MOXIE_CPU(cs);
  30
  31     cpu->env.pc = value;
  32 }
  33
  34 static bool moxie_cpu_has_work(CPUState *cs)
  35 {
  36     return cs->interrupt_request & CPU_INTERRUPT_HARD;
  37 }
  38
  39 static void moxie_cpu_reset(CPUState *s)
  40 {
  41     MoxieCPU *cpu = MOXIE_CPU(s);
  42     MoxieCPUClass *mcc = MOXIE_CPU_GET_CLASS(cpu);
  43     CPUMoxieState *env = &cpu->env;
  44
  45     mcc->parent_reset(s);
  46
  47     memset(env, 0, offsetof(CPUMoxieState, end_reset_fields));
  48     env->pc = 0x1000;
  49 }
  50
  51 static void moxie_cpu_disas_set_info(CPUState *cpu, disassemble_info *info)
  52 {
  53     info->mach = bfd_arch_moxie;
  54     info->print_insn = print_insn_moxie;
  55 }
  56
  57 static void moxie_cpu_realizefn(DeviceState *dev, Error **errp)
  58 {
  59     CPUState *cs = CPU(dev);
  60     MoxieCPUClass *mcc = MOXIE_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     cpu_reset(cs);
  71
  72     mcc->parent_realize(dev, errp);
  73 }
  74
  75 static void moxie_cpu_initfn(Object *obj)
  76 {
  77     CPUState *cs = CPU(obj);
  78     MoxieCPU *cpu = MOXIE_CPU(obj);
  79
  80     cs->env_ptr = &cpu->env;
  81 }
  82
  83 static ObjectClass *moxie_cpu_class_by_name(const char *cpu_model)
  84 {
  85     ObjectClass *oc;
  86     char *typename;
  87
  88     typename = g_strdup_printf(MOXIE_CPU_TYPE_NAME("%s"), cpu_model);
  89     oc = object_class_by_name(typename);
  90     g_free(typename);
  91     if (oc != NULL && (!object_class_dynamic_cast(oc, TYPE_MOXIE_CPU) ||
  92                        object_class_is_abstract(oc))) {
  93         return NULL;
  94     }
  95     return oc;
  96 }
  97
  98 static void moxie_cpu_class_init(ObjectClass *oc, void *data)
  99 {
 100     DeviceClass *dc = DEVICE_CLASS(oc);
 101     CPUClass *cc = CPU_CLASS(oc);
 102     MoxieCPUClass *mcc = MOXIE_CPU_CLASS(oc);
 103
 104     device_class_set_parent_realize(dc, moxie_cpu_realizefn,
 105                                     &mcc->parent_realize);
 106     mcc->parent_reset = cc->reset;
 107     cc->reset = moxie_cpu_reset;
 108
 109     cc->class_by_name = moxie_cpu_class_by_name;
 110
 111     cc->has_work = moxie_cpu_has_work;
 112     cc->do_interrupt = moxie_cpu_do_interrupt;
 113     cc->dump_state = moxie_cpu_dump_state;
 114     cc->set_pc = moxie_cpu_set_pc;
 115 #ifdef CONFIG_USER_ONLY
 116     cc->handle_mmu_fault = moxie_cpu_handle_mmu_fault;
 117 #else
 118     cc->get_phys_page_debug = moxie_cpu_get_phys_page_debug;
 119     cc->vmsd = &vmstate_moxie_cpu;
 120 #endif
 121     cc->disas_set_info = moxie_cpu_disas_set_info;
 122     cc->tcg_initialize = moxie_translate_init;
 123 }
 124
 125 static void moxielite_initfn(Object *obj)
 126 {
 127     /* Set cpu feature flags */
 128 }
 129
 130 static void moxie_any_initfn(Object *obj)
 131 {
 132     /* Set cpu feature flags */
 133 }
 134
 135 #define DEFINE_MOXIE_CPU_TYPE(cpu_model, initfn) \
 136     {                                            \
 137         .parent = TYPE_MOXIE_CPU,                \
 138         .instance_init = initfn,                 \
 139         .name = MOXIE_CPU_TYPE_NAME(cpu_model),  \
 140     }
 141
 142 static const TypeInfo moxie_cpus_type_infos[] = {
 143     { /* base class should be registered first */
 144         .name = TYPE_MOXIE_CPU,
 145         .parent = TYPE_CPU,
 146         .instance_size = sizeof(MoxieCPU),
 147         .instance_init = moxie_cpu_initfn,
 148         .class_size = sizeof(MoxieCPUClass),
 149         .class_init = moxie_cpu_class_init,
 150     },
 151     DEFINE_MOXIE_CPU_TYPE("MoxieLite", moxielite_initfn),
 152     DEFINE_MOXIE_CPU_TYPE("any", moxie_any_initfn),
 153 };
 154
 155 DEFINE_TYPES(moxie_cpus_type_infos)