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 "qemu-common.h"
  12 #include "cpu.h"
  13 #include "hw/hw.h"
  14 #include "hw/m68k/mcf.h"
  15 #include "hw/boards.h"
  16 #include "hw/loader.h"
  17 #include "elf.h"
  18 #include "exec/address-spaces.h"
  19 #include "qemu/error-report.h"
  20 #include "sysemu/qtest.h"
  21
  22 #define KERNEL_LOAD_ADDR 0x10000
  23 #define AN5206_MBAR_ADDR 0x10000000
  24 #define AN5206_RAMBAR_ADDR 0x20000000
  25
  26 /* Board init.  */
  27
  28 static void an5206_init(MachineState *machine)
  29 {
  30     ram_addr_t ram_size = machine->ram_size;
  31     const char *cpu_model = machine->cpu_model;
  32     const char *kernel_filename = machine->kernel_filename;
  33     M68kCPU *cpu;
  34     CPUM68KState *env;
  35     int kernel_size;
  36     uint64_t elf_entry;
  37     hwaddr entry;
  38     MemoryRegion *address_space_mem = get_system_memory();
  39     MemoryRegion *ram = g_new(MemoryRegion, 1);
  40     MemoryRegion *sram = g_new(MemoryRegion, 1);
  41
  42     if (!cpu_model) {
  43         cpu_model = "m5206";
  44     }
  45     cpu = cpu_m68k_init(cpu_model);
  46     if (!cpu) {
  47         error_report("Unable to find m68k CPU definition");
  48         exit(1);
  49     }
  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_allocate_system_memory(ram, NULL, "an5206.ram", ram_size);
  60     memory_region_add_subregion(address_space_mem, 0, ram);
  61
  62     /* Internal SRAM.  */
  63     memory_region_init_ram(sram, NULL, "an5206.sram", 512, &error_fatal);
  64     vmstate_register_ram_global(sram);
  65     memory_region_add_subregion(address_space_mem, AN5206_RAMBAR_ADDR, sram);
  66
  67     mcf5206_init(address_space_mem, AN5206_MBAR_ADDR, cpu);
  68
  69     /* Load kernel.  */
  70     if (!kernel_filename) {
  71         if (qtest_enabled()) {
  72             return;
  73         }
  74         fprintf(stderr, "Kernel image must be specified\n");
  75         exit(1);
  76     }
  77
  78     kernel_size = load_elf(kernel_filename, NULL, NULL, &elf_entry,
  79                            NULL, NULL, 1, EM_68K, 0, 0);
  80     entry = elf_entry;
  81     if (kernel_size < 0) {
  82         kernel_size = load_uimage(kernel_filename, &entry, NULL, NULL,
  83                                   NULL, NULL);
  84     }
  85     if (kernel_size < 0) {
  86         kernel_size = load_image_targphys(kernel_filename, KERNEL_LOAD_ADDR,
  87                                           ram_size - KERNEL_LOAD_ADDR);
  88         entry = KERNEL_LOAD_ADDR;
  89     }
  90     if (kernel_size < 0) {
  91         fprintf(stderr, "qemu: could not load kernel '%s'\n", kernel_filename);
  92         exit(1);
  93     }
  94
  95     env->pc = entry;
  96 }
  97
  98 static void an5206_machine_init(MachineClass *mc)
  99 {
 100     mc->desc = "Arnewsh 5206";
 101     mc->init = an5206_init;
 102 }
 103
 104 DEFINE_MACHINE("an5206", an5206_machine_init)