target-lm32/cpu.c

   1 /*
   2  * QEMU LatticeMico32 CPU
   3  *
   4  * Copyright (c) 2012 SUSE LINUX Products GmbH
   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
  17  * License along with this library; if not, see
  18  * <http://www.gnu.org/licenses/lgpl-2.1.html>
  19  */
  20
  21 #include "cpu.h"
  22 #include "qemu-common.h"
  23
  24
  25 /* CPUClass::reset() */
  26 static void lm32_cpu_reset(CPUState *s)
  27 {
  28     LM32CPU *cpu = LM32_CPU(s);
  29     LM32CPUClass *lcc = LM32_CPU_GET_CLASS(cpu);
  30     CPULM32State *env = &cpu->env;
  31
  32     lcc->parent_reset(s);
  33
  34     /* reset cpu state */
  35     memset(env, 0, offsetof(CPULM32State, breakpoints));
  36
  37     tlb_flush(env, 1);
  38 }
  39
  40 static void lm32_cpu_realizefn(DeviceState *dev, Error **errp)
  41 {
  42     LM32CPU *cpu = LM32_CPU(dev);
  43     LM32CPUClass *lcc = LM32_CPU_GET_CLASS(dev);
  44
  45     cpu_reset(CPU(cpu));
  46
  47     lcc->parent_realize(dev, errp);
  48 }
  49
  50 static void lm32_cpu_initfn(Object *obj)
  51 {
  52     CPUState *cs = CPU(obj);
  53     LM32CPU *cpu = LM32_CPU(obj);
  54     CPULM32State *env = &cpu->env;
  55     static bool tcg_initialized;
  56
  57     cs->env_ptr = env;
  58     cpu_exec_init(env);
  59
  60     env->flags = 0;
  61
  62     if (tcg_enabled() && !tcg_initialized) {
  63         tcg_initialized = true;
  64         lm32_translate_init();
  65     }
  66 }
  67
  68 static void lm32_cpu_class_init(ObjectClass *oc, void *data)
  69 {
  70     LM32CPUClass *lcc = LM32_CPU_CLASS(oc);
  71     CPUClass *cc = CPU_CLASS(oc);
  72     DeviceClass *dc = DEVICE_CLASS(oc);
  73
  74     lcc->parent_realize = dc->realize;
  75     dc->realize = lm32_cpu_realizefn;
  76
  77     lcc->parent_reset = cc->reset;
  78     cc->reset = lm32_cpu_reset;
  79
  80     cc->do_interrupt = lm32_cpu_do_interrupt;
  81     cc->dump_state = lm32_cpu_dump_state;
  82     cpu_class_set_vmsd(cc, &vmstate_lm32_cpu);
  83 }
  84
  85 static const TypeInfo lm32_cpu_type_info = {
  86     .name = TYPE_LM32_CPU,
  87     .parent = TYPE_CPU,
  88     .instance_size = sizeof(LM32CPU),
  89     .instance_init = lm32_cpu_initfn,
  90     .abstract = false,
  91     .class_size = sizeof(LM32CPUClass),
  92     .class_init = lm32_cpu_class_init,
  93 };
  94
  95 static void lm32_cpu_register_types(void)
  96 {
  97     type_register_static(&lm32_cpu_type_info);
  98 }
  99
 100 type_init(lm32_cpu_register_types)