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 "hw.h"
  10 #include "sysemu.h"
  11 #include "boards.h"
  12
  13 #define KERNEL_LOAD_ADDR 0x10000
  14
  15 /* Board init.  */
  16
  17 static void dummy_m68k_init(ram_addr_t ram_size,
  18                      const char *boot_device,
  19                      const char *kernel_filename, const char *kernel_cmdline,
  20                      const char *initrd_filename, const char *cpu_model)
  21 {
  22     CPUState *env;
  23     int kernel_size;
  24     uint64_t elf_entry;
  25     target_ulong entry;
  26
  27     if (!cpu_model)
  28         cpu_model = "cfv4e";
  29     env = cpu_init(cpu_model);
  30     if (!env) {
  31         fprintf(stderr, "Unable to find m68k CPU definition\n");
  32         exit(1);
  33     }
  34
  35     /* Initialize CPU registers.  */
  36     env->vbr = 0;
  37
  38     /* RAM at address zero */
  39     cpu_register_physical_memory(0, ram_size,
  40         qemu_ram_alloc(ram_size) | IO_MEM_RAM);
  41
  42     /* Load kernel.  */
  43     if (kernel_filename) {
  44         kernel_size = load_elf(kernel_filename, 0, &elf_entry, NULL, NULL);
  45         entry = elf_entry;
  46         if (kernel_size < 0) {
  47             kernel_size = load_uimage(kernel_filename, &entry, NULL, NULL);
  48         }
  49         if (kernel_size < 0) {
  50             kernel_size = load_image_targphys(kernel_filename,
  51                                               KERNEL_LOAD_ADDR,
  52                                               ram_size - KERNEL_LOAD_ADDR);
  53             entry = KERNEL_LOAD_ADDR;
  54         }
  55         if (kernel_size < 0) {
  56             fprintf(stderr, "qemu: could not load kernel '%s'\n",
  57                     kernel_filename);
  58             exit(1);
  59         }
  60     } else {
  61         entry = 0;
  62     }
  63     env->pc = entry;
  64 }
  65
  66 static QEMUMachine dummy_m68k_machine = {
  67     .name = "dummy",
  68     .desc = "Dummy board",
  69     .init = dummy_m68k_init,
  70 };
  71
  72 static void dummy_m68k_machine_init(void)
  73 {
  74     qemu_register_machine(&dummy_m68k_machine);
  75 }
  76
  77 machine_init(dummy_m68k_machine_init);