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,
  16                      const char *boot_device, DisplayState *ds,
  17                      const char **fd_filename, int snapshot,
  18                      const char *kernel_filename, const char *kernel_cmdline,
  19                      const char *initrd_filename, const char *cpu_model)
  20 {
  21     CPUState *env;
  22     int kernel_size;
  23     uint64_t elf_entry;
  24     target_ulong entry;
  25
  26     if (!cpu_model)
  27         cpu_model = "cfv4e";
  28     env = cpu_init(cpu_model);
  29     if (!env) {
  30         fprintf(stderr, "Unable to find m68k CPU definition\n");
  31         exit(1);
  32     }
  33
  34     /* Initialize CPU registers.  */
  35     env->vbr = 0;
  36
  37     /* RAM at address zero */
  38     cpu_register_physical_memory(0, ram_size,
  39         qemu_ram_alloc(ram_size) | IO_MEM_RAM);
  40
  41     /* Load kernel.  */
  42     if (kernel_filename) {
  43         kernel_size = load_elf(kernel_filename, 0, &elf_entry, NULL, NULL);
  44         entry = elf_entry;
  45         if (kernel_size < 0) {
  46             kernel_size = load_uboot(kernel_filename, &entry, NULL);
  47         }
  48         if (kernel_size < 0) {
  49             kernel_size = load_image(kernel_filename,
  50                                      phys_ram_base + KERNEL_LOAD_ADDR);
  51             entry = KERNEL_LOAD_ADDR;
  52         }
  53         if (kernel_size < 0) {
  54             fprintf(stderr, "qemu: could not load kernel '%s'\n",
  55                     kernel_filename);
  56             exit(1);
  57         }
  58     } else {
  59         entry = 0;
  60     }
  61     env->pc = entry;
  62 }
  63
  64 QEMUMachine dummy_m68k_machine = {
  65     "dummy",
  66     "Dummy board",
  67     dummy_m68k_init,
  68 };