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