hw/m68k/an5206.c

   1 /*
   2  * Arnewsh 5206 ColdFire system emulation.
   3  *
   4  * Copyright (c) 2007 CodeSourcery.
   5  *
   6  * This code is licensed under the GPL
   7  */
   8
   9 #include "hw/hw.h"
  10 #include "hw/mcf.h"
  11 #include "hw/boards.h"
  12 #include "hw/loader.h"
  13 #include "elf.h"
  14 #include "exec/address-spaces.h"
  15
  16 #define KERNEL_LOAD_ADDR 0x10000
  17 #define AN5206_MBAR_ADDR 0x10000000
  18 #define AN5206_RAMBAR_ADDR 0x20000000
  19
  20 /* Board init.  */
  21
  22 static void an5206_init(QEMUMachineInitArgs *args)
  23 {
  24     ram_addr_t ram_size = args->ram_size;
  25     const char *cpu_model = args->cpu_model;
  26     const char *kernel_filename = args->kernel_filename;
  27     M68kCPU *cpu;
  28     CPUM68KState *env;
  29     int kernel_size;
  30     uint64_t elf_entry;
  31     hwaddr entry;
  32     MemoryRegion *address_space_mem = get_system_memory();
  33     MemoryRegion *ram = g_new(MemoryRegion, 1);
  34     MemoryRegion *sram = g_new(MemoryRegion, 1);
  35
  36     if (!cpu_model) {
  37         cpu_model = "m5206";
  38     }
  39     cpu = cpu_m68k_init(cpu_model);
  40     if (!cpu) {
  41         hw_error("Unable to find m68k CPU definition\n");
  42     }
  43     env = &cpu->env;
  44
  45     /* Initialize CPU registers.  */
  46     env->vbr = 0;
  47     /* TODO: allow changing MBAR and RAMBAR.  */
  48     env->mbar = AN5206_MBAR_ADDR | 1;
  49     env->rambar0 = AN5206_RAMBAR_ADDR | 1;
  50
  51     /* DRAM at address zero */
  52     memory_region_init_ram(ram, "an5206.ram", ram_size);
  53     vmstate_register_ram_global(ram);
  54     memory_region_add_subregion(address_space_mem, 0, ram);
  55
  56     /* Internal SRAM.  */
  57     memory_region_init_ram(sram, "an5206.sram", 512);
  58     vmstate_register_ram_global(sram);
  59     memory_region_add_subregion(address_space_mem, AN5206_RAMBAR_ADDR, sram);
  60
  61     mcf5206_init(address_space_mem, AN5206_MBAR_ADDR, cpu);
  62
  63     /* Load kernel.  */
  64     if (!kernel_filename) {
  65         fprintf(stderr, "Kernel image must be specified\n");
  66         exit(1);
  67     }
  68
  69     kernel_size = load_elf(kernel_filename, NULL, NULL, &elf_entry,
  70                            NULL, NULL, 1, ELF_MACHINE, 0);
  71     entry = elf_entry;
  72     if (kernel_size < 0) {
  73         kernel_size = load_uimage(kernel_filename, &entry, NULL, NULL);
  74     }
  75     if (kernel_size < 0) {
  76         kernel_size = load_image_targphys(kernel_filename, KERNEL_LOAD_ADDR,
  77                                           ram_size - KERNEL_LOAD_ADDR);
  78         entry = KERNEL_LOAD_ADDR;
  79     }
  80     if (kernel_size < 0) {
  81         fprintf(stderr, "qemu: could not load kernel '%s'\n", kernel_filename);
  82         exit(1);
  83     }
  84
  85     env->pc = entry;
  86 }
  87
  88 static QEMUMachine an5206_machine = {
  89     .name = "an5206",
  90     .desc = "Arnewsh 5206",
  91     .init = an5206_init,
  92     DEFAULT_MACHINE_OPTIONS,
  93 };
  94
  95 static void an5206_machine_init(void)
  96 {
  97     qemu_register_machine(&an5206_machine);
  98 }
  99
 100 machine_init(an5206_machine_init);