LXR qemu/hw/m68k/dummy

   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 "qemu/osdep.h"
  10#include "qemu-common.h"
  11#include "cpu.h"
  12#include "hw/hw.h"
  13#include "hw/boards.h"
  14#include "hw/loader.h"
  15#include "elf.h"
  16#include "exec/address-spaces.h"
  17
  18#define KERNEL_LOAD_ADDR 0x10000
  19
  20/* Board init.  */
  21
  22static void dummy_m68k_init(MachineState *machine)
  23{
  24    ram_addr_t ram_size = machine->ram_size;
  25    const char *cpu_model = machine->cpu_model;
  26    const char *kernel_filename = machine->kernel_filename;
  27    M68kCPU *cpu;
  28    CPUM68KState *env;
  29    MemoryRegion *address_space_mem =  get_system_memory();
  30    MemoryRegion *ram = g_new(MemoryRegion, 1);
  31    int kernel_size;
  32    uint64_t elf_entry;
  33    hwaddr entry;
  34
  35    if (!cpu_model)
  36        cpu_model = "cfv4e";
  37    cpu = cpu_m68k_init(cpu_model);
  38    if (!cpu) {
  39        fprintf(stderr, "Unable to find m68k CPU definition\n");
  40        exit(1);
  41    }
  42    env = &cpu->env;
  43
  44    /* Initialize CPU registers.  */
  45    env->vbr = 0;
  46
  47    /* RAM at address zero */
  48    memory_region_allocate_system_memory(ram, NULL, "dummy_m68k.ram",
  49                                         ram_size);
  50    memory_region_add_subregion(address_space_mem, 0, ram);
  51
  52    /* Load kernel.  */
  53    if (kernel_filename) {
  54        kernel_size = load_elf(kernel_filename, NULL, NULL, &elf_entry,
  55                               NULL, NULL, 1, EM_68K, 0, 0);
  56        entry = elf_entry;
  57        if (kernel_size < 0) {
  58            kernel_size = load_uimage(kernel_filename, &entry, NULL, NULL,
  59                                      NULL, NULL);
  60        }
  61        if (kernel_size < 0) {
  62            kernel_size = load_image_targphys(kernel_filename,
  63                                              KERNEL_LOAD_ADDR,
  64                                              ram_size - KERNEL_LOAD_ADDR);
  65            entry = KERNEL_LOAD_ADDR;
  66        }
  67        if (kernel_size < 0) {
  68            fprintf(stderr, "qemu: could not load kernel '%s'\n",
  69                    kernel_filename);
  70            exit(1);
  71        }
  72    } else {
  73        entry = 0;
  74    }
  75    env->pc = entry;
  76}
  77
  78static void dummy_m68k_machine_init(MachineClass *mc)
  79{
  80    mc->desc = "Dummy board";
  81    mc->init = dummy_m68k_init;
  82}
  83
  84DEFINE_MACHINE("dummy", dummy_m68k_machine_init)
  85