LXR qemu/hw/dummy

   1/*
   2 * Dummy board with just RAM and CPU for use as an ISS.
   3 *
   4 * Copyright (c) 2007 CodeSourcery.
   5 *
   6 * This code is licensed under the GPL
   7 */
   8
   9#include "hw.h"
  10#include "boards.h"
  11#include "loader.h"
  12#include "elf.h"
  13#include "exec/address-spaces.h"
  14
  15#define KERNEL_LOAD_ADDR 0x10000
  16
  17/* Board init.  */
  18
  19static void dummy_m68k_init(QEMUMachineInitArgs *args)
  20{
  21    ram_addr_t ram_size = args->ram_size;
  22    const char *cpu_model = args->cpu_model;
  23    const char *kernel_filename = args->kernel_filename;
  24    CPUM68KState *env;
  25    MemoryRegion *address_space_mem =  get_system_memory();
  26    MemoryRegion *ram = g_new(MemoryRegion, 1);
  27    int kernel_size;
  28    uint64_t elf_entry;
  29    hwaddr entry;
  30
  31    if (!cpu_model)
  32        cpu_model = "cfv4e";
  33    env = cpu_init(cpu_model);
  34    if (!env) {
  35        fprintf(stderr, "Unable to find m68k CPU definition\n");
  36        exit(1);
  37    }
  38
  39    /* Initialize CPU registers.  */
  40    env->vbr = 0;
  41
  42    /* RAM at address zero */
  43    memory_region_init_ram(ram, "dummy_m68k.ram", ram_size);
  44    vmstate_register_ram_global(ram);
  45    memory_region_add_subregion(address_space_mem, 0, ram);
  46
  47    /* Load kernel.  */
  48    if (kernel_filename) {
  49        kernel_size = load_elf(kernel_filename, NULL, NULL, &elf_entry,
  50                               NULL, NULL, 1, ELF_MACHINE, 0);
  51        entry = elf_entry;
  52        if (kernel_size < 0) {
  53            kernel_size = load_uimage(kernel_filename, &entry, NULL, NULL);
  54        }
  55        if (kernel_size < 0) {
  56            kernel_size = load_image_targphys(kernel_filename,
  57                                              KERNEL_LOAD_ADDR,
  58                                              ram_size - KERNEL_LOAD_ADDR);
  59            entry = KERNEL_LOAD_ADDR;
  60        }
  61        if (kernel_size < 0) {
  62            fprintf(stderr, "qemu: could not load kernel '%s'\n",
  63                    kernel_filename);
  64            exit(1);
  65        }
  66    } else {
  67        entry = 0;
  68    }
  69    env->pc = entry;
  70}
  71
  72static QEMUMachine dummy_m68k_machine = {
  73    .name = "dummy",
  74    .desc = "Dummy board",
  75    .init = dummy_m68k_init,
  76    DEFAULT_MACHINE_OPTIONS,
  77};
  78
  79static void dummy_m68k_machine_init(void)
  80{
  81    qemu_register_machine(&dummy_m68k_machine);
  82}
  83
  84machine_init(dummy_m68k_machine_init);
  85