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/error-report.h"
  16 #include "hw/boards.h"
  17 #include "sysemu/sysemu.h"
  18 #include "exec/address-spaces.h"
  19 #include "hw/core/cpu.h"
  20
  21 static void machine_none_init(MachineState *mch)
  22 {
  23     CPUState *cpu = NULL;
  24
  25     /* Initialize CPU (if user asked for it) */
  26     if (mch->cpu_type) {
  27         cpu = cpu_create(mch->cpu_type);
  28         if (!cpu) {
  29             error_report("Unable to initialize CPU");
  30             exit(1);
  31         }
  32     }
  33
  34     /* RAM at address zero */
  35     if (mch->ram_size) {
  36         MemoryRegion *ram = g_new(MemoryRegion, 1);
  37
  38         memory_region_allocate_system_memory(ram, NULL, "ram", mch->ram_size);
  39         memory_region_add_subregion(get_system_memory(), 0, ram);
  40     }
  41
  42     if (mch->kernel_filename) {
  43         error_report("The -kernel parameter is not supported "
  44                      "(use the generic 'loader' device instead).");
  45         exit(1);
  46     }
  47 }
  48
  49 static void machine_none_machine_init(MachineClass *mc)
  50 {
  51     mc->desc = "empty machine";
  52     mc->init = machine_none_init;
  53     mc->max_cpus = 1;
  54     mc->default_ram_size = 0;
  55 }
  56
  57 DEFINE_MACHINE("none", machine_none_machine_init)