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 "boards.h"
  11 #include "loader.h"
  12 #include "elf.h"
  13
  14 #define KERNEL_LOAD_ADDR 0x10000
  15
  16 /* Board init.  */
  17
  18 static void dummy_m68k_init(ram_addr_t ram_size,
  19                      const char *boot_device,
  20                      const char *kernel_filename, const char *kernel_cmdline,
  21                      const char *initrd_filename, const char *cpu_model)
  22 {
  23     CPUState *env;
  24     int kernel_size;
  25     uint64_t elf_entry;
  26     target_phys_addr_t entry;
  27
  28     if (!cpu_model)
  29         cpu_model = "cfv4e";
  30     env = cpu_init(cpu_model);
  31     if (!env) {
  32         fprintf(stderr, "Unable to find m68k CPU definition\n");
  33         exit(1);
  34     }
  35
  36     /* Initialize CPU registers.  */
  37     env->vbr = 0;
  38
  39     /* RAM at address zero */
  40     cpu_register_physical_memory(0, ram_size,
  41         qemu_ram_alloc(NULL, "dummy_m68k.ram", ram_size) | IO_MEM_RAM);
  42
  43     /* Load kernel.  */
  44     if (kernel_filename) {
  45         kernel_size = load_elf(kernel_filename, NULL, NULL, &elf_entry,
  46                                NULL, NULL, 1, ELF_MACHINE, 0);
  47         entry = elf_entry;
  48         if (kernel_size < 0) {
  49             kernel_size = load_uimage(kernel_filename, &entry, NULL, NULL);
  50         }
  51         if (kernel_size < 0) {
  52             kernel_size = load_image_targphys(kernel_filename,
  53                                               KERNEL_LOAD_ADDR,
  54                                               ram_size - KERNEL_LOAD_ADDR);
  55             entry = KERNEL_LOAD_ADDR;
  56         }
  57         if (kernel_size < 0) {
  58             fprintf(stderr, "qemu: could not load kernel '%s'\n",
  59                     kernel_filename);
  60             exit(1);
  61         }
  62     } else {
  63         entry = 0;
  64     }
  65     env->pc = entry;
  66 }
  67
  68 static QEMUMachine dummy_m68k_machine = {
  69     .name = "dummy",
  70     .desc = "Dummy board",
  71     .init = dummy_m68k_init,
  72 };
  73
  74 static void dummy_m68k_machine_init(void)
  75 {
  76     qemu_register_machine(&dummy_m68k_machine);
  77 }
  78
  79 machine_init(dummy_m68k_machine_init);