hw/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.h"
  10 #include "mcf.h"
  11 #include "boards.h"
  12 #include "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     CPUM68KState *env;
  28     int kernel_size;
  29     uint64_t elf_entry;
  30     hwaddr entry;
  31     MemoryRegion *address_space_mem = get_system_memory();
  32     MemoryRegion *ram = g_new(MemoryRegion, 1);
  33     MemoryRegion *sram = g_new(MemoryRegion, 1);
  34
  35     if (!cpu_model)
  36         cpu_model = "m5206";
  37     env = cpu_init(cpu_model);
  38     if (!env) {
  39         hw_error("Unable to find m68k CPU definition\n");
  40     }
  41
  42     /* Initialize CPU registers.  */
  43     env->vbr = 0;
  44     /* TODO: allow changing MBAR and RAMBAR.  */
  45     env->mbar = AN5206_MBAR_ADDR | 1;
  46     env->rambar0 = AN5206_RAMBAR_ADDR | 1;
  47
  48     /* DRAM at address zero */
  49     memory_region_init_ram(ram, "an5206.ram", ram_size);
  50     vmstate_register_ram_global(ram);
  51     memory_region_add_subregion(address_space_mem, 0, ram);
  52
  53     /* Internal SRAM.  */
  54     memory_region_init_ram(sram, "an5206.sram", 512);
  55     vmstate_register_ram_global(sram);
  56     memory_region_add_subregion(address_space_mem, AN5206_RAMBAR_ADDR, sram);
  57
  58     mcf5206_init(address_space_mem, AN5206_MBAR_ADDR, env);
  59
  60     /* Load kernel.  */
  61     if (!kernel_filename) {
  62         fprintf(stderr, "Kernel image must be specified\n");
  63         exit(1);
  64     }
  65
  66     kernel_size = load_elf(kernel_filename, NULL, NULL, &elf_entry,
  67                            NULL, NULL, 1, ELF_MACHINE, 0);
  68     entry = elf_entry;
  69     if (kernel_size < 0) {
  70         kernel_size = load_uimage(kernel_filename, &entry, NULL, NULL);
  71     }
  72     if (kernel_size < 0) {
  73         kernel_size = load_image_targphys(kernel_filename, KERNEL_LOAD_ADDR,
  74                                           ram_size - KERNEL_LOAD_ADDR);
  75         entry = KERNEL_LOAD_ADDR;
  76     }
  77     if (kernel_size < 0) {
  78         fprintf(stderr, "qemu: could not load kernel '%s'\n", kernel_filename);
  79         exit(1);
  80     }
  81
  82     env->pc = entry;
  83 }
  84
  85 static QEMUMachine an5206_machine = {
  86     .name = "an5206",
  87     .desc = "Arnewsh 5206",
  88     .init = an5206_init,
  89     DEFAULT_MACHINE_OPTIONS,
  90 };
  91
  92 static void an5206_machine_init(void)
  93 {
  94     qemu_register_machine(&an5206_machine);
  95 }
  96
  97 machine_init(an5206_machine_init);