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(int ram_size, int vga_ram_size,
  18                      const char *boot_device, DisplayState *ds,
  19                      const char **fd_filename, int snapshot,
  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_ulong 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(ram_size) | IO_MEM_RAM);
  42
  43     /* Load kernel.  */
  44     if (kernel_filename) {
  45         kernel_size = load_elf(kernel_filename, 0, &elf_entry, NULL, NULL);
  46         entry = elf_entry;
  47         if (kernel_size < 0) {
  48             kernel_size = load_uboot(kernel_filename, &entry, NULL);
  49         }
  50         if (kernel_size < 0) {
  51             kernel_size = load_image(kernel_filename,
  52                                      phys_ram_base + 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 QEMUMachine dummy_m68k_machine = {
  67     "dummy",
  68     "Dummy board",
  69     dummy_m68k_init,
  70 };