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 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-memory.h"
  14
  15 #define KERNEL_LOAD_ADDR 0x10000
  16
  17 /* Board init.  */
  18
  19 static void dummy_m68k_init(ram_addr_t ram_size,
  20                      const char *boot_device,
  21                      const char *kernel_filename, const char *kernel_cmdline,
  22                      const char *initrd_filename, const char *cpu_model)
  23 {
  24     CPUState *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     target_phys_addr_t 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, NULL, "dummy_m68k.ram", ram_size);
  44     memory_region_add_subregion(address_space_mem, 0, ram);
  45
  46     /* Load kernel.  */
  47     if (kernel_filename) {
  48         kernel_size = load_elf(kernel_filename, NULL, NULL, &elf_entry,
  49                                NULL, NULL, 1, ELF_MACHINE, 0);
  50         entry = elf_entry;
  51         if (kernel_size < 0) {
  52             kernel_size = load_uimage(kernel_filename, &entry, NULL, NULL);
  53         }
  54         if (kernel_size < 0) {
  55             kernel_size = load_image_targphys(kernel_filename,
  56                                               KERNEL_LOAD_ADDR,
  57                                               ram_size - KERNEL_LOAD_ADDR);
  58             entry = KERNEL_LOAD_ADDR;
  59         }
  60         if (kernel_size < 0) {
  61             fprintf(stderr, "qemu: could not load kernel '%s'\n",
  62                     kernel_filename);
  63             exit(1);
  64         }
  65     } else {
  66         entry = 0;
  67     }
  68     env->pc = entry;
  69 }
  70
  71 static QEMUMachine dummy_m68k_machine = {
  72     .name = "dummy",
  73     .desc = "Dummy board",
  74     .init = dummy_m68k_init,
  75 };
  76
  77 static void dummy_m68k_machine_init(void)
  78 {
  79     qemu_register_machine(&dummy_m68k_machine);
  80 }
  81
  82 machine_init(dummy_m68k_machine_init);