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 "hw/hw.h"
  10 #include "hw/m68k/mcf.h"
  11 #include "hw/boards.h"
  12 #include "hw/loader.h"
  13 #include "elf.h"
  14 #include "exec/address-spaces.h"
  15 #include "qemu/error-report.h"
  16 #include "sysemu/qtest.h"
  17
  18 #define KERNEL_LOAD_ADDR 0x10000
  19 #define AN5206_MBAR_ADDR 0x10000000
  20 #define AN5206_RAMBAR_ADDR 0x20000000
  21
  22 /* Board init.  */
  23
  24 static void an5206_init(MachineState *machine)
  25 {
  26     ram_addr_t ram_size = machine->ram_size;
  27     const char *cpu_model = machine->cpu_model;
  28     const char *kernel_filename = machine->kernel_filename;
  29     M68kCPU *cpu;
  30     CPUM68KState *env;
  31     int kernel_size;
  32     uint64_t elf_entry;
  33     hwaddr entry;
  34     MemoryRegion *address_space_mem = get_system_memory();
  35     MemoryRegion *ram = g_new(MemoryRegion, 1);
  36     MemoryRegion *sram = g_new(MemoryRegion, 1);
  37
  38     if (!cpu_model) {
  39         cpu_model = "m5206";
  40     }
  41     cpu = cpu_m68k_init(cpu_model);
  42     if (!cpu) {
  43         error_report("Unable to find m68k CPU definition");
  44         exit(1);
  45     }
  46     env = &cpu->env;
  47
  48     /* Initialize CPU registers.  */
  49     env->vbr = 0;
  50     /* TODO: allow changing MBAR and RAMBAR.  */
  51     env->mbar = AN5206_MBAR_ADDR | 1;
  52     env->rambar0 = AN5206_RAMBAR_ADDR | 1;
  53
  54     /* DRAM at address zero */
  55     memory_region_allocate_system_memory(ram, NULL, "an5206.ram", ram_size);
  56     memory_region_add_subregion(address_space_mem, 0, ram);
  57
  58     /* Internal SRAM.  */
  59     memory_region_init_ram(sram, NULL, "an5206.sram", 512, &error_fatal);
  60     vmstate_register_ram_global(sram);
  61     memory_region_add_subregion(address_space_mem, AN5206_RAMBAR_ADDR, sram);
  62
  63     mcf5206_init(address_space_mem, AN5206_MBAR_ADDR, cpu);
  64
  65     /* Load kernel.  */
  66     if (!kernel_filename) {
  67         if (qtest_enabled()) {
  68             return;
  69         }
  70         fprintf(stderr, "Kernel image must be specified\n");
  71         exit(1);
  72     }
  73
  74     kernel_size = load_elf(kernel_filename, NULL, NULL, &elf_entry,
  75                            NULL, NULL, 1, EM_68K, 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         fprintf(stderr, "qemu: could not load kernel '%s'\n", 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 }
  99
 100 DEFINE_MACHINE("an5206", an5206_machine_init)