hw/dummy_m68k.c

   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 licenced under the GPL
   7  */
   8
   9 #include "vl.h"
  10
  11 #define KERNEL_LOAD_ADDR 0x10000
  12
  13 /* Board init.  */
  14
  15 static void dummy_m68k_init(int ram_size, int vga_ram_size, int boot_device,
  16                      DisplayState *ds, const char **fd_filename, int snapshot,
  17                      const char *kernel_filename, const char *kernel_cmdline,
  18                      const char *initrd_filename, const char *cpu_model)
  19 {
  20     CPUState *env;
  21     int kernel_size;
  22     uint64_t elf_entry;
  23     target_ulong entry;
  24
  25     env = cpu_init();
  26     if (!cpu_model)
  27         cpu_model = "cfv4e";
  28     if (cpu_m68k_set_model(env, cpu_model)) {
  29         cpu_abort(env, "Unable to find m68k CPU definition\n");
  30     }
  31
  32     /* Initialize CPU registers.  */
  33     env->vbr = 0;
  34
  35     /* RAM at address zero */
  36     cpu_register_physical_memory(0, ram_size,
  37         qemu_ram_alloc(ram_size) | IO_MEM_RAM);
  38
  39     /* Load kernel.  */
  40     if (kernel_filename) {
  41         kernel_size = load_elf(kernel_filename, 0, &elf_entry, NULL, NULL);
  42         entry = elf_entry;
  43         if (kernel_size < 0) {
  44             kernel_size = load_uboot(kernel_filename, &entry, NULL);
  45         }
  46         if (kernel_size < 0) {
  47             kernel_size = load_image(kernel_filename,
  48                                      phys_ram_base + KERNEL_LOAD_ADDR);
  49             entry = KERNEL_LOAD_ADDR;
  50         }
  51         if (kernel_size < 0) {
  52             fprintf(stderr, "qemu: could not load kernel '%s'\n",
  53                     kernel_filename);
  54             exit(1);
  55         }
  56     } else {
  57         entry = 0;
  58     }
  59     env->pc = entry;
  60 }
  61
  62 QEMUMachine dummy_m68k_machine = {
  63     "dummy",
  64     "Dummy board",
  65     dummy_m68k_init,
  66 };