target-m68k/cpu.c

   1 /*
   2  * QEMU Motorola 68k 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 m68k_cpu_reset(CPUState *s)
  27 {
  28     M68kCPU *cpu = M68K_CPU(s);
  29     M68kCPUClass *mcc = M68K_CPU_GET_CLASS(cpu);
  30     CPUM68KState *env = &cpu->env;
  31
  32     if (qemu_loglevel_mask(CPU_LOG_RESET)) {
  33         qemu_log("CPU Reset (CPU %d)\n", env->cpu_index);
  34         log_cpu_state(env, 0);
  35     }
  36
  37     mcc->parent_reset(s);
  38
  39     memset(env, 0, offsetof(CPUM68KState, breakpoints));
  40 #if !defined(CONFIG_USER_ONLY)
  41     env->sr = 0x2700;
  42 #endif
  43     m68k_switch_sp(env);
  44     /* ??? FP regs should be initialized to NaN.  */
  45     env->cc_op = CC_OP_FLAGS;
  46     /* TODO: We should set PC from the interrupt vector.  */
  47     env->pc = 0;
  48     tlb_flush(env, 1);
  49 }
  50
  51 static void m68k_cpu_initfn(Object *obj)
  52 {
  53     M68kCPU *cpu = M68K_CPU(obj);
  54     CPUM68KState *env = &cpu->env;
  55
  56     cpu_exec_init(env);
  57 }
  58
  59 static void m68k_cpu_class_init(ObjectClass *c, void *data)
  60 {
  61     M68kCPUClass *mcc = M68K_CPU_CLASS(c);
  62     CPUClass *cc = CPU_CLASS(c);
  63
  64     mcc->parent_reset = cc->reset;
  65     cc->reset = m68k_cpu_reset;
  66 }
  67
  68 static const TypeInfo m68k_cpu_type_info = {
  69     .name = TYPE_M68K_CPU,
  70     .parent = TYPE_CPU,
  71     .instance_size = sizeof(M68kCPU),
  72     .instance_init = m68k_cpu_initfn,
  73     .abstract = false,
  74     .class_size = sizeof(M68kCPUClass),
  75     .class_init = m68k_cpu_class_init,
  76 };
  77
  78 static void m68k_cpu_register_types(void)
  79 {
  80     type_register_static(&m68k_cpu_type_info);
  81 }
  82
  83 type_init(m68k_cpu_register_types)