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