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