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