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 "qemu/osdep.h"
  10 #include "qapi/error.h"
  11 #include "cpu.h"
  12 #include "hw/m68k/mcf.h"
  13 #include "hw/boards.h"
  14 #include "hw/loader.h"
  15 #include "elf.h"
  16 #include "qemu/error-report.h"
  17 #include "sysemu/qtest.h"
  18
  19 #define KERNEL_LOAD_ADDR 0x10000
  20 #define AN5206_MBAR_ADDR 0x10000000
  21 #define AN5206_RAMBAR_ADDR 0x20000000
  22
  23 static void mcf5206_init(M68kCPU *cpu, MemoryRegion *sysmem, uint32_t base)
  24 {
  25     DeviceState *dev;
  26     SysBusDevice *s;
  27
  28     dev = qdev_new(TYPE_MCF5206_MBAR);
  29     object_property_set_link(OBJECT(dev), "m68k-cpu",
  30                              OBJECT(cpu), &error_abort);
  31     s = SYS_BUS_DEVICE(dev);
  32     sysbus_realize_and_unref(s, &error_fatal);
  33
  34     memory_region_add_subregion(sysmem, base, sysbus_mmio_get_region(s, 0));
  35 }
  36
  37 static void an5206_init(MachineState *machine)
  38 {
  39     ram_addr_t ram_size = machine->ram_size;
  40     const char *kernel_filename = machine->kernel_filename;
  41     M68kCPU *cpu;
  42     CPUM68KState *env;
  43     int kernel_size;
  44     uint64_t elf_entry;
  45     hwaddr entry;
  46     MemoryRegion *address_space_mem = get_system_memory();
  47     MemoryRegion *sram = g_new(MemoryRegion, 1);
  48
  49     cpu = M68K_CPU(cpu_create(machine->cpu_type));
  50     env = &cpu->env;
  51
  52     /* Initialize CPU registers.  */
  53     env->vbr = 0;
  54     /* TODO: allow changing MBAR and RAMBAR.  */
  55     env->mbar = AN5206_MBAR_ADDR | 1;
  56     env->rambar0 = AN5206_RAMBAR_ADDR | 1;
  57
  58     /* DRAM at address zero */
  59     memory_region_add_subregion(address_space_mem, 0, machine->ram);
  60
  61     /* Internal SRAM.  */
  62     memory_region_init_ram(sram, NULL, "an5206.sram", 512, &error_fatal);
  63     memory_region_add_subregion(address_space_mem, AN5206_RAMBAR_ADDR, sram);
  64
  65     mcf5206_init(cpu, address_space_mem, AN5206_MBAR_ADDR);
  66
  67     /* Load kernel.  */
  68     if (!kernel_filename) {
  69         if (qtest_enabled()) {
  70             return;
  71         }
  72         error_report("Kernel image must be specified");
  73         exit(1);
  74     }
  75
  76     kernel_size = load_elf(kernel_filename, NULL, NULL, NULL, &elf_entry,
  77                            NULL, NULL, NULL, 1, EM_68K, 0, 0);
  78     entry = elf_entry;
  79     if (kernel_size < 0) {
  80         kernel_size = load_uimage(kernel_filename, &entry, NULL, NULL,
  81                                   NULL, NULL);
  82     }
  83     if (kernel_size < 0) {
  84         kernel_size = load_image_targphys(kernel_filename, KERNEL_LOAD_ADDR,
  85                                           ram_size - KERNEL_LOAD_ADDR);
  86         entry = KERNEL_LOAD_ADDR;
  87     }
  88     if (kernel_size < 0) {
  89         error_report("Could not load kernel '%s'", kernel_filename);
  90         exit(1);
  91     }
  92
  93     env->pc = entry;
  94 }
  95
  96 static void an5206_machine_init(MachineClass *mc)
  97 {
  98     mc->desc = "Arnewsh 5206";
  99     mc->init = an5206_init;
 100     mc->default_cpu_type = M68K_CPU_TYPE_NAME("m5206");
 101     mc->default_ram_id = "an5206.ram";
 102 }
 103
 104 DEFINE_MACHINE("an5206", an5206_machine_init)