hw/core/null-machine.c

   1 /*
   2  * Empty machine
   3  *
   4  * Copyright IBM, Corp. 2012
   5  *
   6  * Authors:
   7  *  Anthony Liguori   <aliguori@us.ibm.com>
   8  *
   9  * This work is licensed under the terms of the GNU GPL, version 2 or later.
  10  * See the COPYING file in the top-level directory.
  11  *
  12  */
  13
  14 #include "qemu/osdep.h"
  15 #include "qemu-common.h"
  16 #include "qemu/error-report.h"
  17 #include "hw/hw.h"
  18 #include "hw/boards.h"
  19 #include "sysemu/sysemu.h"
  20 #include "exec/address-spaces.h"
  21 #include "cpu.h"
  22
  23 static void machine_none_init(MachineState *mch)
  24 {
  25     CPUState *cpu = NULL;
  26
  27     /* Initialize CPU (if a model has been specified) */
  28     if (mch->cpu_model) {
  29         cpu = cpu_init(mch->cpu_model);
  30         if (!cpu) {
  31             error_report("Unable to initialize CPU");
  32             exit(1);
  33         }
  34     }
  35
  36     /* RAM at address zero */
  37     if (mch->ram_size) {
  38         MemoryRegion *ram = g_new(MemoryRegion, 1);
  39
  40         memory_region_allocate_system_memory(ram, NULL, "ram", mch->ram_size);
  41         memory_region_add_subregion(get_system_memory(), 0, ram);
  42     }
  43 }
  44
  45 static void machine_none_machine_init(MachineClass *mc)
  46 {
  47     mc->desc = "empty machine";
  48     mc->init = machine_none_init;
  49     mc->max_cpus = 1;
  50     mc->default_ram_size = 0;
  51 }
  52
  53 DEFINE_MACHINE("none", machine_none_machine_init)